JP7315914B2 - SIMPLE SOIL IMPROVEMENT SYSTEM AND SIMPLE SOIL IMPROVEMENT METHOD - Google Patents

Description

TECHNICAL FIELD The present invention relates to a simple soil improvement system for producing improved soil by mixing fluid soil and improvement material, excluding cohesive soil. It relates to a simple soil improvement method.

In conventional soil improvement work, after examining various conditions such as the conditions of the construction site where the construction is performed, the environment of the surrounding area adjacent to the construction site, and the soil quality of the construction site, Selection of soil improvement method (method) and selection of improvement materials suitable for soil improvement are being carried out. Here, as conventional soil improvement methods, for example, a backhoe method, a stabilizer method, a self-propelled soil improvement method, and the like have been proposed.

In the backhoe method, a backhoe equipped with a special mixing bucket is used to mix and agitate the soft soil and improvement material in the area up to about 2m from the surface layer of the soft ground, which is the target area for soil improvement. This is a construction method for improving the target area. A backhoe is a construction machine equipped with a shovel (bucket) for scooping up earth and sand, and is generically called a so-called hydraulic excavator.

In the stabilizer method, a stabilizer is used to spray the soil improvement material on the surface of the soft ground up to about 1.2m from the surface of the soil improvement target area, and the stabilizer is used to mix and stir the soil. This is a construction method for improving the areas to be improved. The stabilizer is a construction machine equipped with a stirrer having rotary blades for stirring earth and sand, and the running mechanism of the base machine includes a crawler type and a wheel type.

The self-propelled soil improvement machine method is a construction method that uses a self-propelled soil improvement machine to agitate and mix soil and improvement material inside the device to generate improved soil. The self-propelled soil improvement machine measures the volume of the earth and sand put into its hopper inside the device, and puts in an amount of improvement material corresponding to the measured volume of the earth and sand to generate improved soil. It is said that there is little error in adding the improvement material, and because the soil and sand and the improvement material are stirred and mixed inside the device, the mixing efficiency is higher than the backhoe method and the stabilizer method, and the additional rate of the improvement material is small. It is

Japanese Patent Application Laid-Open No. 2014-40704

Hiroshi Suzuki, Junji Fukuda, ``Examples of improvement work using a mobile soil improvement machine'', [online], October 29, 2009, Ministry of Land, Infrastructure, Transport and Tourism National Land Technology Study Group, [March 5, 2019] Search], Internet (URL: http://www.mlit.go.jp/chosahokoku/h21giken/program/kadai/pdf/innovation/inno1-01.pdf)

However, in the above-described backhoe method and stabilizer method, the improvement material is directly sprinkled on the soft ground that is the target soil improvement site, and the soft soil and the improvement material are mixed by the backhoe or stabilizer, so the outdoor area is the target soil improvement site. In this case, there is a problem that the improvement material becomes dust and scatters, the mixing efficiency of the improvement soil is low, and the premium rate of the improvement material becomes high.

In particular, the backhoe method scoops up a large amount of soil and improvement material when mixing the soil and improvement material, and mixes them while dropping them on the ground. Since a large amount of dust scatters around the construction site, there is a problem that the dust damage to the surrounding area of the construction site becomes serious. Moreover, in the backhoe construction method, since the soil and improvement material are mixed by scooping them up with the backhoe bucket operated by the operator, it is difficult to mix the earth and sand and the improvement material uniformly. There was a problem that it was difficult to produce a large amount of good quality improved soil because the quality of the soil is greatly affected.

On the other hand, in the stabilizer construction method, since the soil and improvement material are stirred and mixed by a stirrer whose rotary blades rotate at high speed, the improved soil can be stirred and mixed more efficiently than in the backhoe method. For this reason, the soil and improvement material can be uniformly mixed with each other, and the quality of the improvement soil is stabilized. In addition, there is a problem that a large amount of the improvement material turns into dust and is likely to be blown up in the air, and as a result, the dust damage to the surrounding area of the construction site cannot be eliminated.

On the other hand, in the self-propelled soil improvement machine method, the inside of the self-propelled soil improvement machine is not completely sealed. Compared to the construction method and the stabilizer construction method, the generation of dust is suppressed, but a stockyard is required to temporarily store the improved soil generated by the self-propelled soil improvement machine. Moreover, since this stockyard requires a large area of land, it was not possible to secure a sufficiently large stockyard near the soil improvement site where the improved soil was provided, and A stockyard is often set up in a remote location, and the improved soil temporarily placed in such a distant stockyard is loaded onto a freight vehicle such as a dump truck by a backhoe, providing a soil improvement location. It needs to be transported to a location.

In the self-propelled soil improvement machine method, a large amount of improved soil is continuously generated by the self-propelled soil improvement machine, so it is necessary to secure sufficient time for stirring and mixing the soil and improvement material. In some cases, the earth and sand and the improvement material cannot be uniformly mixed with each other, and there is a problem that uneven mixing of the earth and sand and the improvement material occurs due to insufficient stirring. In addition, since the improved soil temporarily placed in the stockyard is transported using cargo vehicles such as dump trucks, when the improved soil is unloaded from the dump truck, the improved soil is scattered and the surrounding soil is removed. There is a problem that it becomes impossible to separate it by being mixed with the soil, and wastefully loses the expensive improved soil.

Moreover, when the improved soil generated by the self-propelled soil improvement machine method is temporarily placed in an outdoor stockyard, it cannot be distinguished from mere surplus soil. However, there is a problem that a large amount of money is lost due to the possibility of discarding it without permission. For example, improved soil, which is a mixture of bakelite and sand, looks like soil, so it is often discarded without knowing that it is improved soil, and such improved soil is priced like cement. It is equivalent and costs about 20,000 yen per 1 cubic meter. Assuming that the price of the improved soil used in the entire construction is 200 million yen, about 20 to 30% of the improved soil generated in the construction is wastefully disposed of, and the price is 20 to 30 million yen. , the economic loss will be large.

Moreover, the rental fee for the self-propelled soil improvement machine is, for example, 2.5 million yen per month, and the total annual rental fee is 30 million yen, which is extremely high. For this reason, it is extremely difficult to use a self-propelled soil improvement machine for construction work with a small construction budget. However, there is still the problem that various problems associated with the use of these conventional construction methods cannot be resolved.

The present invention has been made to solve the above-mentioned problems, it can suppress the dust scattering of soil and improvement material compared to the backhoe method and the stabilizer method, and the budget is lower than the self-propelled soil improvement machine method. A simple soil improvement system and a simple soil improvement method capable of generating improved soil of higher quality and suitable for appropriately generating improved soil according to a required amount without temporarily placing the improved soil in a stockyard. is intended to provide

In order to achieve this object, the simple earth and sand improvement system of the first invention generates improved earth and sand by mixing fluid earth and sand except cohesive soil with an improvement material. A running and moving type agitating device having a closed agitating vessel mounted on a traveling body for accommodating and agitating a material to be agitated containing earth and sand and an improvement material, and the agitation of the agitating device from a position away from the agitating vessel. A transfer device for transferring a material to be stirred to a container, a supply mechanism for supplying earth and sand to the transfer device on the upstream side in the transfer direction from the position of the agitating container, and the earth and sand supplied by the supply mechanism can be accommodated. a soil supply device having a container, a supply mechanism for supplying the improving material to the transfer device to which the soil is supplied by the soil supply device upstream in the transfer direction from the position of the stirring container, and the supply mechanism. an improvement material supply device having a storage container capable of accommodating the improvement material to be treated; an improvement material weighing device for weighing the improvement material contained in the storage container of the improvement material supply device; and an earth and sand weighing device for weighing the earth and sand contained in the container.

According to the simple soil improvement system of the first invention, when a predetermined weight of improved soil is to be generated, the same volume of the material to be stirred as the predetermined weight is put into the closed stirring container of the stirring device. When producing a predetermined weight of improved soil containing soil and an improvement material at a predetermined mixing weight ratio, an object to be agitated containing the soil and an improvement material at the same mixing weight ratio as the improved soil is required. In other words, when generating a predetermined weight of improved soil, the required weight of soil and sand obtained by multiplying this predetermined weight by the mixing weight ratio of the soil and the required mixing obtained by multiplying this predetermined weight by the mixing weight ratio of the improving material It must be mixed with a weight improver.

Therefore, first, a required mixing weight of earth and sand is put into a storage container of the earth and sand supply device, and then an improvement material of the required mixing weight is put into the improvement material supply device. At this time, put the earth and sand into the container of the earth and sand supply device, measure the weight of the earth and sand contained in the container of the earth and sand supply device with the earth and sand weighing device, and check that the container contains the required weight of the earth and sand. When confirmed, the earth and sand weight weighing process by the earth and sand weighing device is terminated.

In addition, when the required mixing weight of the improving material is put into the improving material supply device, the weight of the improving material contained in the storage container of the improving material supply device is measured by the improving material weighing device, and the required mixing weight in the storage container is measured. When it is confirmed that the improver has entered, the improver weighing process by the improver weighing device is terminated. Incidentally, the measured value of the weight obtained by each weighing device may be output and displayed on a display unit or the like.

When the required mixing weight of soil and improvement material enters the storage container of the soil supply device and improvement material supply device, the supply mechanism of the soil supply device and improvement material supply device feeds the earth and sand and improvement material. Feed the transfer device in small increments relative to the required compounding weight from the device's container. The supply mechanism of the earth and sand supply device and the improvement material supply device is such that the earth and sand are fed to the transfer device upstream in the direction of transfer by the transfer device relative to the position at which the transfer device supplies the earth and sand and the improvement material to the stirring container of the agitation device. and supply improved materials.

By transferring the earth and sand and the improvement material to the stirring vessel by the transfer device, the stirring vessel, the earth and sand supply device, and the improvement material supply device can be installed at positions separated from each other. When doing so, it is possible to prevent the presence of the earth and sand supply device and the improvement material supply device from being an obstacle, and it is easy to prevent the agitating device from being an obstacle to travel, and the workability of the entire construction site can be improved. In addition, for example, the earth and sand supply device and the improvement material supply device do not interfere with the stirring operation of the stirring vessel due to their proximity to the stirring device, so that the operator of the stirring device can secure a space for working around the stirring device.

When the earth and sand supply device and the improvement material supply device have supplied the soil and the improvement material by the required mixing weight, respectively, the step of supplying the material to be stirred by the earth and sand supply device and the improvement material supply device is completed, and the transfer device reaches the required mixing weight. When all of the earth and sand and the improving material are carried into the stirring container of the stirring device, the step of transporting the material to be stirred by the transporting device is completed.

After a predetermined weight of material to be stirred is placed in the stirring vessel, the stirring device causes the stirring vessel to perform a stirring operation, and the traveling body is driven by the power source to travel toward the improved soil providing site. do. During the travel to the providing location, the agitating device agitates the material to be agitated by causing the agitating vessel to agitate, so that the earth and sand and the improvement material are uniformly dispersed and mixed in a state with less unevenness. to generate a predetermined weight of improved soil.

Therefore, according to the agitating device provided with this traveling body, the time for agitating the material to be agitated to generate the improved soil can be utilized as the time for transporting the improved soil to the supply location. Then, when the agitating device arrives at the place where the improved soil is provided, the improved soil is discharged from the agitating container of the agitating device and provided to the soil improvement location. After discharging the improved earth and sand, the agitating device travels back to the downstream side of the transfer device in the transfer direction by the traveling body, and waits until the material to be agitated is again thrown in by the transfer device.

In addition, a plurality of stirring devices may be used. In such a case, when one stirring device is traveling to the place of provision and is absent, the material to be stirred can be put into the stirring container of the other stirring device, so the material to be stirred is carried into the stirring device. It is possible to prevent the process from being interrupted or stagnant.

<Stirring effect due to falling>
The simple soil improvement system of the second invention is the simple soil improvement system of the first invention, wherein the transfer device receives the earth and sand and the improvement material supplied by the supply mechanisms of the earth and sand supply device and the improvement material supply device and transfers them in a transfer direction. An upstream transfer device that transfers to the downstream side, and a downstream transfer device that receives the earth and sand and the improvement material that have fallen from the transfer direction downstream side of the upstream transfer device and transfers them as a material to be stirred toward the agitation container of the agitation device. I have.

According to the simple soil improvement system of the second invention, in addition to having the same functions and effects as the simple soil improvement system of the first invention, earth and sand are supplied from the container of the earth and sand supply device to the upstream transfer device by the supply mechanism. , the improving material is supplied from the storage container of the improving material supply device to the upstream transfer device by the supply mechanism. The earth and sand and the improvement material are transferred toward the downstream side in the transfer direction by the upstream transfer device, and are dropped from the upstream transfer device to the upstream side in the transfer direction of the next downstream transfer device. The earth and sand and improvement material transferred to the downstream transfer device are transferred downstream in the transfer direction by the downstream transfer device, and are put into the stirring container of the stirring device from the downstream end of the downstream transfer device.

Since the earth and sand and improvement material contained in the material to be stirred that is transferred to the agitation vessel fall from the upstream transfer device to the downstream transfer device in the process of being transferred to the agitation container by the transfer device, they are transferred to the downstream transfer device. Preliminary mixing occurs prior to being mixed in the agitating vessel by intermingling with each other as they fall toward and as they are received by the downstream transfer device. Moreover, since the improvement material is caught in the earth and sand by this mixing, the improvement material becomes dust and becomes difficult to scatter.

In particular, when the transfer device is a belt conveyor device, the transfer device feeds and moves a conveyor belt on which the material to be stirred can be placed from the upstream side to the downstream side by the drive device. Since the earth and sand and the improvement material are placed and transferred, the improvement material may easily become dust and scatter. can be suppressed.

<A pair of upstream transfer devices and two sets of earth and sand supply devices and improvement material supply devices>
A simple soil improvement system according to a third aspect of the invention is the simple soil improvement system according to the second aspect of the invention, wherein the transfer device is a pair of upstream transfer devices to which the soil and improvement material are respectively supplied from the earth and sand supply device and the improvement material supply device. The earth and sand supply device and the improvement material supply device include a set of earth and sand supply device and improvement material supply device for supplying earth and improvement material to one of the pair of upstream transfer devices, and the pair of Another set of soil and improvement material feeders is provided for supplying earth and improvement material to the other of the upstream transfer devices.

According to the simple soil improvement system of the third invention, in addition to having the same functions and effects as the simple soil improvement system of the second invention, one of the pair of upstream transfer devices has one for supplying soil and improvement material. A set of earth and sand supply device and improvement material supply device are arranged, and another set of earth and sand supply device and improvement material supply device for similarly supplying earth and improvement material is arranged in the other of the pair of upstream transfer devices. is set. In such a case, one set of soil supply device and improvement material supply device continues to supply soil and improvement material to one upstream transfer device, while another set of soil supply device and improvement material supply device is used to transfer the other upstream transfer device. It is possible to suspend the supply of earth and sand and improvement material to the agitator and replenish them with earth and sand and improvement material. can be continued continuously.

According to the first modified example of the third aspect of the invention, the simple soil improvement system supplies soil and improvement material to each of the pair of upstream transfer devices by a set of earth and sand supply device and improvement material supply device. can be According to the second modified example of the third invention, in the simple soil improvement system, the upstream transfer device transfers only the earth and sand supplied from the earth and sand supply device, and the improvement material supply device transfers only the earth and sand supplied from the upstream transfer device to the downstream transfer device. By supplying the improvement material toward the earth and sand falling to the ground, the earth and sand and the improvement material may be mixed together as they fall. Further, according to the third modified example of the third invention, the simple soil improvement system separately transfers the soil from one upstream transfer device and the improvement material from the other upstream transfer device to the downstream transfer device. It is also possible to mix the earth and sand with the improvement material in the middle of the fall or on the downstream transfer device.

<Continuous transfer of material to be agitated including earth and sand and improvement material>
A simple soil improvement system according to a fourth invention is the simple soil improvement system according to any one of the first to third inventions, wherein the transferring device continuously transfers the material to be stirred to the stirring container of the stirring device. The earth and sand supply device and the improvement material supply device continuously supply the earth and sand and the improvement material to the transfer device by the supply mechanism.

According to the simple soil improvement system of the fourth invention, in addition to having the same effects and effects as the simple soil improvement system of any one of the first to third inventions, the earth and sand and the improvement material are supplied by the earth and sand supply device and the improvement material supply device. The material is continuously supplied to the transfer device by the device, and is continuously transferred and carried into the stirring container of the stirring device by the transfer device as the material to be stirred. For this reason, when generating a prescribed weight of improved earth and sand, it is not necessary to put all of the required mixing weight of the soil and improving material corresponding to the prescribed weight into the stirring container at once. It is continuously supplied to the transfer device by the earth and sand supply device and the improvement material supply device little by little, and is continuously transferred to the stirring container of the stirring device.

This continuous transfer allows the earth and sand and improvement material to be continuously put into the stirring vessel even in small amounts. Compared to the conventional construction method (see Patent Document 1), it is possible to simplify the process required to put the required weight of the soil and the improvement material into the stirring vessel, and to improve the work efficiency. In addition, when the earth and sand and the improvement material are put into the stirring vessel little by little, by performing the stirring operation of the stirring vessel together before all the earth and sand and the improvement material enter the stirring vessel, the earth and sand and the Since the material to be stirred can be continuously stirred in the process in which the amount of the improvement material is gradually increased from a small amount, the stirring process performed after all the required weight of the soil and the improvement material is put into the stirring device. The execution time can be shortened, and the earth and sand and the improvement material can be evenly stirred and mixed in a shorter time.

<Feeding device equipped with a load sensor>
A simple soil improvement system of a fifth invention is the simple soil improvement system of any one of the first to fourth inventions, wherein the earth and sand weighing device comprises a loading section for receiving the weight of the storage container of the earth and sand supply device, and and a load sensor having a detecting portion for detecting the weight applied to the portion. and a load sensor that detects the applied weight, the earth and sand supply device is equipped with the load sensor of the earth and sand weighing device, and the improvement material supply device is equipped with the improvement material weighing device. is mounted with the load sensor.

According to the simple soil improvement system of the fifth invention, in addition to having the same functions and effects as those of the simple soil improvement system of any one of the first to fourth inventions, the earth and sand supply device is attached to the earth and sand supply mechanism and the container. In addition, the soil weighing device is equipped with a load sensor, and the improving material supply device is equipped with a load sensor provided in the improving material weighing device in addition to the improving material supply mechanism and container. The earth and sand weighing device can measure the weight of the earth and sand via the load sensor when the earth and sand is placed in the storage container of the earth and sand supply device. Further, when the improving material is placed in the storage container of the improving material supply device, the improving material weighing device can measure the weight of the improving material via the load sensor.

In this way, the earth and sand supply device and the improvement material supply device can measure the weight of the objects contained in the container via the load sensors mounted on these devices, so that the weight of the earth and sand and the improvement material can be weighed separately in advance. After that, it is not necessary to put it in the soil supply device and the improvement material supply device. It is possible to simultaneously perform the earth and sand charging step and the improvement material charging step and the weighing step of weighing the replenished earth and sand and the improvement material. Moreover, there is no need to separately prepare a sediment weighing device and an improvement material weighing device, unlike the case of using a sediment weighing device and an improvement material weighing device that do not have a weighing function.

Here, according to the earth and sand weighing device, when the weight of the earth and sand is measured, the load sensor mounted on the earth and sand supply device receives the weight of the container of the earth and sand supply device by the loading section, and measures the received weight. It is weighed by its detection part. For example, according to the earth and sand weighing device, when weighing the earth and sand using the load sensor, first, the weight (unloaded weight) of the container of the earth and sand supply device in the unloaded state (unstored state) of the earth and sand is measured. and weighing the weight (already loaded weight) of the container in the loaded state (stored state) of the earth and sand, calculating the difference value between the unloaded weight and the already loaded weight as the measured value of the weight of the earth and sand, By displaying the calculation result, it can be presented to an operator or the like. Then, by putting the earth and sand into the storage container of the earth and sand supply device until the measured value of the weight of the displayed earth and sand reaches the required mixing weight, the earth and sand of the required mixing weight can be accurately put into the earth and sand supply device. .

Further, according to the improving material weighing device, when the weight of the improving material is measured, the load sensor mounted on the improving material supply device receives the weight of the storage container of the improving material supply device by its loading portion. The weight is measured by the detector. For example, according to the improving material weighing device, when the weight of the improving material is measured using the load sensor, first, the weight of the storage container of the improving material supply device in the state where the improving material is not loaded (unloaded state) (unloaded state) The weight of the improved material is measured, and the weight of the container in which the improved material is loaded (accommodated state) (already loaded weight) is measured, and the difference between the unloaded weight and the already loaded weight is the weight of the improved material. By calculating the measurement value and displaying the result of the calculation, it is possible to present it to the operator or the like. Then, by putting the improving material into the storage container of the improving material supply device until the measured value of the displayed weight of the improving material reaches the required mixing weight, the improving material of the required mixing weight is accurately supplied to the improving material supply device. can be put in

<Stirrer using mixer truck>
A simple soil improvement system according to a sixth invention is the simple soil improvement system according to any one of the first to fifth inventions, wherein the agitating device comprises an automobile as the traveling body and the sealing device rotatably mounted on the automobile. a mixing drum that is a stirring container of a mold; an inlet for charging the material to be stirred into the mixing drum by the transfer device; a discharge port for discharging the improved soil from the mixing drum; and a driving device for rotating the mixing drum in the forward direction to stir the material to be stirred and driving the mixing drum in the reverse direction to discharge the material to be stirred from the discharge port.

According to the simple soil improvement system of the sixth invention, in addition to having the same function and effect as the simple soil improvement system of any one of the first to fifth inventions, the mixing drum of the mixer truck is reversely driven by the driving device. When the material to be stirred is discharged from the discharge port, if the soil contained in the material to be stirred is cohesive, the material to be stirred will stick to the inside of the mixing drum, making it impossible to discharge the material to be stirred from the discharge port. However, since the soil contained in the material to be stirred is soil excluding cohesive soil, the soil becomes sticky in the mixing drum. As a result, the improved earth and sand can be discharged through the discharge port, and the material to be stirred can be sufficiently stirred in the mixing drum.

<Prevention of dust due to the narrow opening of the stirring vessel>
A simple soil improvement system according to a seventh invention is the simple soil improvement system according to any one of the first to sixth inventions, wherein the stirring container of the stirring device has an inlet for charging the material to be stirred into the stirring container. However, the opening area of the inlet is narrower than the maximum cross-sectional area of the stirring vessel.

According to the simple soil improvement system of the seventh invention, in addition to having the same actions and effects as the simple soil improvement system of any one of the first to sixth inventions, the stirring vessel of the stirring device is placed inside the stirring vessel. Since the opening area of the inlet into which the material to be stirred is introduced is narrower than the maximum cross-sectional area of the stirring vessel, the material to be stirred contained in the stirring vessel can be prevented from scattering outside as dust. . In addition, even if the opening area of the input port is formed narrower than the maximum cross-sectional area of the stirring vessel, the earth and sand and the improving material can be smoothly added to the input port by introducing the soil and improvement material little by little by the transfer device. be able to.

<Mixing by drop collision from a pair of upstream transfer devices>
A simple soil improvement system according to an eighth invention is the simple soil improvement system according to the second invention, the third invention, or any one of the fourth to seventh inventions dependent on the second or third invention, wherein the transfer device comprises: A pair of upstream transfer devices to which the soil and improvement material are respectively supplied from the earth and sand supply device and the improvement material supply device are provided, and the fall path of the earth and improvement material falling from the pair of upstream transfer devices to the downstream transfer device intersect or overlap each other.

According to the simple soil improvement system of the eighth invention, the simple soil improvement system of the second invention, the third invention, or any of the fourth to seventh inventions subordinate to the second or third invention has the same function and In addition to the effect, since the fall paths of the earth and sand and the improvement material falling from each of the pair of upstream transfer devices to the downstream transfer device intersect or overlap each other, the earth and sand and the improvement material falling from one of the upstream transfer devices, The soil and improvement material falling from the other upstream transfer device collide with each other in the middle of the drop path toward the downstream transfer device, and the impact accompanying the collision further promotes the mixing of the earth and sand and the improvement material, resulting in the improvement material. is more likely to be mixed into the earth and sand, so that the improvement material is more difficult to scatter.

<Stirring effect by fall obstruction member>
A simple soil improvement system of a ninth invention is the simple soil improvement system of any one of the second invention, the third invention, or the fourth to eighth inventions dependent on the second or third invention, wherein the upstream transfer device transfers A drop obstructing member is provided on the downstream side in the direction and part of the drop path of the object to be stirred that drops from the upstream transfer device, and collides with the object to be stirred passing through the drop route.

According to the simple soil improvement system of the ninth invention, the simple soil improvement system of the second invention, the third invention, or any of the fourth to eighth inventions subordinate to the second or third invention has the same function and In addition to the effect, in the process of transferring the material to be agitated containing the earth and sand and the improvement material by the transfer device, the earth and sand and the improvement material are dropped from the upstream transfer device to the downstream transfer device, and the earth and sand are dropped in the middle of the dropping path. And by making the improvement material collide with the fall inhibition member, mixing of the earth and sand with the improvement material is further promoted, and the improvement material is more easily mixed into the earth and sand, so that the improvement material is more difficult to scatter.

Note that the drop obstruction member is, for example, a net-like body provided in the path for the earth and sand and the improvement material to fall. It may be provided with a mesh through which the earth and sand and the improvement material pass and fall. In addition, the drop obstruction member is a rod-shaped or plate-shaped member that the earth and sand and the improvement material collide with, and after colliding with these rod-shaped or plate-shaped members, the earth and sand and the improvement material fall again to the downstream transfer device. can be

<Weighing device is a portable load sensor such as a truck scale>
A simple soil improvement system according to a tenth invention is the simple soil improvement system according to any one of the first to ninth inventions, wherein the earth and sand weighing device comprises a loading section on which the earth and sand supply device is placed, and and a detector for detecting the applied weight, and the improving material weighing device includes a loading section on which the improving material supply device is placed and the weight applied on the loading section. and a portable load sensor that detects the

According to the simple soil improvement system of the tenth invention, in addition to having the same functions and effects as the simple soil improvement system of any one of the first to ninth inventions, both the soil weighing device and the improvement material weighing device are portable. By placing the earth and sand supply device and the improvement material supply device on the loading parts of these load sensors, the weight of the earth and sand supply device and the improvement material supply device can be detected by the detection part of the load sensor. detectable. Therefore, a general-purpose soil hopper or improvement material hopper without a weighing function can be used as the soil supply device and the improvement material supply device, and a simple simple soil improvement system can be easily configured.

Here, the earth and sand supply device is placed on the loading portion of the portable load sensor, and the weight of the earth and sand supply device on the load portion is measured by the detection portion of the load sensor. For example, according to the earth and sand weighing device, when measuring the weight of earth and sand using a load sensor, first, the weight of the earth and sand supply device (unloaded weight) is measured with no earth and sand loaded (unaccommodated state), , the weight of the earth and sand supply device (already loaded weight) is weighed in the earth and sand loaded state (accommodated state), and the difference value between the unloaded weight and the already loaded weight is calculated as the weighed value of the earth and sand weight, and the result of this calculation is can be presented to a worker or the like by displaying . Then, by putting the earth and sand into the storage container of the earth and sand supply device until the measured value of the weight of the displayed earth and sand reaches the required weight of the earth and sand, the earth and sand can be accurately put into the earth and sand supply device for the required weight of the mixture. can be done.

The improving material supply device is placed on the loading portion of the portable load sensor, and the weight of the improving material supply device on the loading portion is measured by the detection portion of the load sensor. For example, according to the improvement material weighing device, when measuring the weight of the improvement material using the load sensor, first, the weight (unloaded weight) of the improvement material supply device is measured while the improvement material is not loaded (unaccommodated state). In addition, the weight of the improvement material supply device (already loaded weight) is weighed in the loading state (accommodated state) of the improvement material, and the difference value between the unloaded weight and the already loaded weight is the measured value of the weight of the improvement material. , and the result of the calculation can be displayed to the operator or the like. Then, by putting the improving material into the storage container of the improving material supply device until the measured value of the displayed weight of the improving material reaches the required mixing weight of the improving material, the improving material supply device is improved by the required mixing weight. Materials can be inserted accurately.

<Insert sand and improvement materials together>
A simple soil improvement system of an eleventh invention is the simple soil improvement system of any one of the first to tenth inventions, instead of the earth and sand supply device and the improvement material supply device, A raw material supply device having a supply mechanism for supplying a material to be stirred on an upstream side and a storage container capable of collectively storing the soil and improvement material contained in the material to be stirred supplied by the supply mechanism, wherein the soil and sand. Instead of the weighing device and the improving material weighing device, a raw material weighing device for weighing the soil and improved soil contained in the container of the raw material supply device is provided.

According to the simple soil improvement system of the eleventh invention, the same functions and effects as the simple soil improvement systems of the first to tenth inventions can be obtained. It is put into a storage container, and the earth and sand and the improvement material are supplied together from the storage container to the transfer device by the supply mechanism. In such a case, the weight of the earth and sand and the improvement material contained in the container of the raw material supply device can be collectively weighed by one raw material weighing device. For example, the difference value between the weight of the storage container of the raw material supply device without soil and improvement material (unloaded weight) and the weight of the storage container with soil and sand (soil loaded weight) The weight of earth and sand is taken as a measured value, and earth and sand are put into the storage container until the measured value of the weight of earth and sand reaches the required mixing weight. Then, the difference between the weight of the container containing the required mixing weight of earth and sand (required mixing weight of earth and sand) and the weight of the container containing the improvement material (improving material loading weight) is calculated. The weight of the improver is measured, and the improver is added to the container until the weight of the improver reaches the required compounding weight. As a result, it is possible to store the earth and sand and the improvement material by their required mixing weights in one container.

<Simple soil improvement method>
A simple soil improvement method according to a twelfth invention is a simple soil improvement method for generating improved soil of a predetermined weight by mixing fluid soil other than cohesive soil and an improvement material by the required mixing weight, wherein the soil is stored in a supply device. A sediment weighing process in which the required mixing weight of soil is measured by a weighing device while it is contained in a container, and an improvement in which the required mixing weight of improved material is measured by a weighing device while the improved material is contained in the storage container of the supply device. The material weighing process, the soil weighing process, and the improvement material weighing process, and the required blended weight of earth and sand and the improved material weighed are supplied to the transfer device by the supply device, and gradually smaller than the required blended weight by the transfer device. a step of putting the material into a closed stirring container of a stirring device; and a transporting step of transporting the agitating device to the location where the agitating device is provided by moving the traveling body provided in the agitating device to the location where the agitating device is provided during the agitating step. there is

A simple soil improvement method of a thirteenth aspect of the invention is the simple soil improvement method of the twelfth aspect of the invention, wherein the earth and sand weighing step measures the weight of the earth and sand contained in the container while filling the container of the supply device with the earth and sand. It is weighed by the weighing device, and when the weight of the weighed soil and sand reaches the required blending weight, the loading of the soil and sand is stopped, and the improving material weighing step includes the storage container of the supply device. While adding the improving material to the storage container, the weight of the improving material contained in the container is weighed by the weighing device, and when the weighed weight of the improving material reaches the required blending weight, the improving material is added. to stop

According to the simple soil improvement system of the present invention, the agitating device travels to the location where improved soil is provided by means of its traveling body, so only the material to be agitated of a predetermined weight that can be accommodated in the agitating vessel is transported at one time. Since it can only be transported, the amount of improved soil produced per time can be limited to a predetermined weight that can be accommodated in the agitating vessel. It is possible for field workers who do not know that improved soil is extremely expensive to dispose of it without knowing it, just like cheap unnecessary soil such as construction surplus soil. There is an effect that it can be prevented, and the loss of construction cost accompanying disposal of such improved earth and sand can be suppressed.

Moreover, according to the agitating device provided with the traveling body, the time for agitating the material to be agitated to generate the improved soil can be utilized as the time for transporting the improved soil to the supply location. In other words, while the agitating device is moving toward the supply location by traveling the traveling body, the agitating process of the material to be agitated necessary for generating the improved soil can be simultaneously progressed, so that the improved soil can be supplied to the location. There is an effect that the lead time associated with the process can be shortened.

In addition, since the earth and sand and the improvement material are stirred in a closed stirring container, there is an effect that it is possible to prevent the earth and sand and the improvement material from turning into dust and scattering during the stirring. Furthermore, since the earth and sand and the improvement material are transferred by the transfer device and sequentially transferred to the agitating vessel of the agitating device, the earth and sand and the improvement material cannot be put into the agitating vessel at once, and the earth and sand and the improvement material are not required. It will be transferred toward the stirring vessel little by little compared to the blending weight. Therefore, compared to the case where a large amount of soil and improvement material is put into the stirring vessel at once, for example, when the soil and improvement material are dropped into the inlet of the stirring vessel, the scattering amount of the soil and improvement material can be reduced. There is

BRIEF DESCRIPTION OF THE DRAWINGS It is the front view which showed the structure of the soil improvement system which is one Embodiment of this invention. FIG. 2 is an enlarged view of FIG. 1; 1 is a plan view showing the configuration of a soil improvement system; FIG. It is a side view which shows the structure of a soil improvement system. 1 is a flowchart of a soil improvement method using a soil improvement system; FIG. 10 is an explanatory diagram relating to the soil improvement system of the second embodiment, and is a plan view showing a modified part of the soil improvement system of the first embodiment; FIG. 10 is an explanatory diagram relating to the soil improvement system of the second embodiment, and is a side view showing a modified part of the soil improvement system of the first embodiment; FIG. 10 is an explanatory diagram relating to the soil improvement system of the third embodiment, and is a plan view showing a modified part of the soil improvement system of the first embodiment; FIG. 10 is an explanatory diagram relating to the soil improvement system of the third embodiment, and is a side view showing a modified part of the soil improvement system of the first embodiment; FIG. 10 is an explanatory diagram relating to the soil improvement system of the fourth embodiment, and is a plan view showing a modified part of the soil improvement system of the first embodiment; FIG. 10 is an explanatory diagram relating to the soil improvement system of the fourth embodiment, and is a side view showing a modified part of the soil improvement system of the first embodiment; FIG. 10 is an explanatory diagram relating to the soil improvement system of the fifth embodiment, and is a plan view showing a modified part of the soil improvement system of the first embodiment; FIG. 10 is an explanatory diagram relating to the soil improvement system of the fifth embodiment, and is a side view showing a modified part of the soil improvement system of the first embodiment;

<First embodiment>
BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. First, a first embodiment of the present invention will be described with reference to FIGS. 1 to 5. FIG. FIG. 1 is a front view showing the configuration of a soil improvement system 1 that is an embodiment of the present invention, FIG. 2 is an enlarged view of FIG. 1, and FIG. 3 shows the configuration of the soil improvement system 1. 4 is a side view showing the configuration of the soil improvement system 1, and FIG. 5 is a flow chart of a soil improvement method using the soil improvement system 1. FIG. 1 to 4, some parts are appropriately omitted for the sake of simplification of the drawings.

As shown in FIGS. 1 to 4, the soil improvement system 1 of the first embodiment generates improved soil by mixing fluid soil and improvement material except for cohesive soil. It has a stirring device 2 , a transfer device 3 , a soil supply device 4 , an improvement material supply device 5 , a soil weighing device 6 , and an improvement material weighing device 7 . This soil improvement system 1 is installed in a soil improvement base. Soil improvement bases are provided, for example, at various construction sites such as construction sites, and at surrounding areas adjacent to construction sites. The soil improvement base is mainly equipped with a transfer device 3, a soil supply device 4, an improvement material supply device 5, a soil measurement device 6, and an improvement material measurement device 7. The agitating device 2 is In order to transport the improved soil, it makes a round trip between the soil improvement base and the soil improvement location where the improved soil is provided.

<Stirring measures>
As shown in FIGS. 1 to 3, the running-moving stirring device 2 contains a running body 21 having an engine as a power source, and an object to be stirred that is mounted on the running body 21 and contains soil and improvement material. and a closed stirring container 22 for mixing and stirring. For example, the stirring device 2 is a mixer truck, the traveling body 21 is an automobile such as a cargo truck, and the stirring container 22 is a mixing drum rotatably mounted on the automobile. In addition, the mixer truck, which is the stirring device 2, has an inlet 23 for charging the material to be stirred into the stirring container 22 by the transfer device 3, an outlet 24 for discharging the improved soil from the stirring container 22, and A stirring drive device 25 drives the stirring vessel 22 in the forward direction to stir the charged material to be stirred and reversely drives the stirring vessel 22 to discharge the material to be stirred from the outlet 24 .

In the stirring vessel 22 of the stirring device 2 using this mixer track, the opening area of the inlet 23 is formed narrower than the maximum cross-sectional area of the stirring vessel 22 (see FIG. 3). Even if the material to be agitated is stirred and moved around by the , the material to be agitated becomes dust and is difficult to scatter outside from the agitating container 22 . Therefore, even if the opening area is narrower than the maximum cross-sectional area of the agitating vessel 22 and the sand and the improvement material are hard to enter, the earth and sand and the improvement material can be put in smoothly.

<Transfer device>
As shown in FIGS. 1 to 4, the transfer device 3 transfers the material to be stirred to the stirring container 22 of the stirring device 2 from a position away from the stirring container 22 . For example, the transport device 3 is a belt conveyor device, and includes a transport belt 3a on which an object to be stirred can be placed, and a drive motor and a transmission mechanism for feeding and moving the transport belt 3a from the upstream side to the downstream side. and a belt driving device 3b.

<Earth and sand supply device>
As shown in FIG. 4 , the earth and sand supply device 4 is a device that supplies earth and sand to the transfer device 3 at a position on the upstream side in the transfer direction of the installation position of the stirring vessel 22 in the transfer device 3 . The earth and sand supply device 4 includes a container 41 capable of containing earth and sand, and a supply mechanism 42 for supplying the earth and sand in the container 41 to the transfer device 3 . For example, the earth and sand supply device 4 is an earth and sand hopper, the container 41 is a container tank having an earth and sand input port 41a and an earth and sand discharge port 41b, and the supply mechanism 42 opens and closes to adjust the opening of the discharge port 41b of the container 41. It has a valve (not shown) and an operation handle 42a for opening and closing the valve. As with the supply mechanism 52 of the improvement material supply device 5, the supply mechanism 42 may use a screw valve 52a, which will be described later.

<Improving material supply device>
The improving material supply device 5 is a device that supplies the improving material to the transfer device 3 at a position on the upstream side in the transfer direction from the installation position of the stirring vessel 22 in the transfer device 3 . The improving material supply device 5 includes a container 51 capable of containing the improving material, and a supply mechanism 52 for supplying the improving material in the containing container 51 to the transfer device 3 . For example, the improving material supply device 5 is an improving material hopper, the container 51 is a tank having an inlet 51a and an outlet 51b for the improving material. and a screw valve 52a for adjusting the weight of the improving material by adjusting the amount of rotation of the screw rotated by the drive motor.

The earth/sand supply device 4 and the improvement material supply device 5 each have containers 41 and 51 held by a frame, which is an outer housing thereof, and this frame is laid on the ground at a site serving as a soil improvement base. It is installed on a base member 8 such as a steel plate. The foundation member 8 is a foundation structure that supports the soil supply device 4 and the improvement material supply device 5 on the installation ground, and reinforces the ground bearing capacity of the installation site.

<Earth and sand weighing device/Improvement material weighing device>
The earth and sand weighing device 6 is a device for weighing the earth and sand contained in the container 41 of the earth and sand supply device 4 . The improver weighing device 7 is a device that measures the weight of the improver contained in the container 51 of the improver supply device 5 . In addition, the stirring device 2, the transfer device 3 (including the upstream transfer device 31 and the downstream transfer device 32), the earth and sand supply device 4, and the improvement material supply device 5 can be transported and moved, or can run by themselves. It is a portable device that can be moved by In addition, the earth and sand weighing device 6 and the improvement material weighing device 7 may be mounted on the earth and sand supply device 4 and the improvement material supply device 5 as will be described later. It may be a portable device that can be moved by

<Temporary mixing by falling transfer device>
As shown in FIGS. 3 and 4 , the transfer device 3 includes an upstream transfer device 31 and a downstream transfer device 32 . The upstream transfer device 31 is a device that receives the earth and sand and the improvement material supplied by the supply mechanisms 52 of the earth and sand supply device 4 and the improvement material supply device 5 and transfers them downstream in the transfer direction. The downstream transfer device 32 is a device that receives the earth and sand and the improvement material that have fallen from the transfer direction downstream side of the upstream transfer device 31 and transfers them toward the stirring container 22 of the stirring device 2 as the material to be stirred. Each of these transfer devices 3 is a belt conveyor device, and includes a transport belt 3a on which an object to be stirred can be placed, and a belt driving device 3b that feeds and moves the transport belt 3a from the upstream side toward the downstream side. and Since the transfer device 3 drops and transfers the material to be stirred containing earth and sand and the improvement material from the upstream transfer device 31 to the downstream transfer device 32, the earth and sand and the improvement material are falling toward the downstream transfer device 32. and when received by the downstream transfer device 32, they mix with each other.

<A pair of upstream transfer devices>
The transfer device 3 includes a pair of upstream transfer devices 31, 31 to which the soil and the improvement material are supplied from the earth and sand supply device 4 and the improvement material supply device 5, respectively. The pair of upstream transfer devices 31, 31 have their transfer directions perpendicular to the transfer direction of the downstream transfer device 32, and each upstream transfer device 31 is perpendicular to the transfer direction of the downstream transfer device 32. It is provided in a state in which the downstream transfer device 32 is sandwiched on both sides in the direction. The pair of upstream transfer devices 31 , 31 are arranged with their transfer direction downstream ends separated from each other, and their transfer direction downstream ends are arranged in the transfer direction of the downstream transfer device 32 . They are located at positions shifted by the same amount as the width of the transport belts 3a, 3a. Therefore, the downstream end in the transfer direction of one upstream transfer device 31 is arranged downstream in the transfer direction of the downstream transfer device 32 compared to the downstream end in the transfer direction of the other upstream transfer device 31. The earth and sand and the improvement material separately dropped from the pair of upstream transfer devices 31, 31 are transferred to the downstream transfer device 32 without colliding in the air while they are falling.

For example, the belt conveyor device used for the downstream transfer device 32 may have a belt moving speed of 50 m/min and a conveying capacity of 4.5 cubic meters/min. , 31 to the downstream transfer device 32 is preferably set within a range that does not exceed the transfer capacity of the downstream transfer device 32 . In both the upstream transfer devices 31, 31 and the downstream transfer device 32, the transfer belt 3a is inclined upward in the transfer direction from the downstream side to the upstream side, and the earth and sand and the improvement material are transferred from the bottom to the top. It is designed to be

In addition, the weight and capacity of the soil and improvement material transferred per unit time by the transfer device 3 can be loaded on the transfer belt 3a of the transfer device 3, that is, the upstream transfer devices 31, 31 and the downstream transfer device 32. Since the weight and volume are limited, it is naturally much smaller than the allowable weight and allowable capacity of the material to be stirred that can be accommodated in the stirring container 22 (mixing drum) of the stirring device 2 (mixer truck). Become. In addition, since the opening area of the inlet 23 of the stirring container 22 is also small, the amount of soil and improvement material supplied by the transfer device 3 is limited to the capacity that can pass through the opening area.

<Two sets of earth and sand supply equipment/improvement material supply equipment>
A set of the soil supply device 4 and the improvement material supply device 5 are arranged in one upstream transfer device 31 , and another set of the soil supply device 4 and the improvement material supply device 5 are arranged in the other upstream transfer device 31 . is set. For this reason, while continuing to supply earth and sand and improvement material to one upstream transfer device 31 by a set of earth and sand supply device 4 and improvement material supply device 5, the other set of earth and sand supply device 4 and improvement material supply device 5 It is also possible to stop the supply of earth and sand and improvement material to the other upstream transfer device 31 and replenish the earth and sand and improvement material. Therefore, by alternately repeating the supply and replenishment of two sets of the earth and sand supply device 4 and the improvement material supply device 5, when supplying the earth and sand and the improvement material to the earth and sand supply device 4 and the improvement material supply device 5, The supply of earth and sand and improvement material to the stirring device 2 by the transfer device 3 can be continuously continued without interruption.

<Continuous Transfer of Transfer Device>
Each of the pair of upstream transfer devices 31 , 31 and downstream transfer device 32 of the transfer device 3 continuously transfers the material to be stirred to the stirring vessel 22 of the stirring device 2 . A pair of upstream transfer devices 31, 31 and a downstream transfer device 32 are configured such that the transfer belt 3a is continuously moved from the upstream side to the downstream side in the transfer direction by the belt driving device 3b, thereby The object to be agitated placed on the is transferred from the upstream side in the transfer direction to the downstream side. The soil supply device 4 and the improvement material supply device 5 are arranged one by one for each upstream transfer device 31, and continuously supply the soil and improvement material to the upstream transfer device 31. .

When generating a predetermined weight of improved soil, the transfer device 3 does not put all of the necessary blended weight of soil and improvement material required for generating the predetermined weight of improved soil into the stirring container 22 at once. It is continuously supplied from the earth and sand supply device 4 and the improvement material supply device 5 in small amounts compared to the required blended weight of the material, and a small amount of the earth and sand and the improvement material is supplied to the stirring container 22 of the stirring device 2. It can be carried in continuously over a period of time. Since the earth and sand and the improvement material can be charged little by little into the inlet 23 of the stirring device 2 in this manner, the amount of the earth and sand and the improvement material that scatters as dust during charging can be reduced.

<Earth and sand weighing device/improvement material weighing device having a weight sensor mounted on the supply device>
The soil weighing device 6 includes a weight sensor 61 having a loading portion 61a for receiving the weight of the container 41 of the soil supplying device 4 and a detecting portion 61b for detecting the weight applied to the loading portion 61a. A sensor 61 is mounted on the sand supply device 4 . The improving material weighing device 7 includes a weight sensor 71 having a loading portion 71a for receiving the weight of the container 51 of the improving material supply device 5 and a detecting portion 71b for detecting the weight applied to the loading portion 71a. The weight sensor 71 is mounted on the improving material supply device 5 . The weight sensor is a load transducer such as a load cell that converts the weight or force applied to the loading part into an electric signal corresponding to the weight or force by the detection part and outputs the signal.・There are some that use various detection (conversion) methods such as piezoelectric, capacitive, electromagnetic, and tuning fork (same below).

Furthermore, the earth and sand weighing device 6 and the improvement material weighing device 7, in addition to the loading portions 61a, 71a and the detecting portions 61b, 71b included in the weight sensors 61, 71, use the electric signals input from the detecting portions 61b, 71b to determine the weight. Calculation units 62 and 72 that convert the measured values into measured values, execute various arithmetic processing using the measured values, and output the measured values or the calculation results, and the measured values or calculations that are input from the calculating units 62 and 72. Display units 63 and 73 for displaying results are provided. Here, the detection results of the weight by the detection units 61b and 71b of the weight sensors 61 and 71 are transmitted to the calculation units 62 of the earth and sand weighing device 6 and the improvement material weighing device 7 via wired or wireless communication units 64 and 74. , 72. The calculation units 62, 72, the display units 63, 73, and the communication units 64, 74 of the earth and sand weighing device 6 and the improvement material weighing device 7 are external devices such as a computer having a communication device such as a PC and a display device. Alternatively, it may be an internal device built into the weight sensors 61 and 71 .

According to the earth and sand weighing device 6, when the weight sensor 61 mounted on the earth and sand supply device 4 receives the weight of the storage container 41 of the earth and sand supply device 4 by the loading portion 61a, the detection portion 61b of the weight sensor 61 receives the weight on the loading portion 61a. It outputs an electric signal corresponding to the size of the weight. For example, the detection unit 61b of the weight sensor 61 outputs an electric signal corresponding to the weight (unloaded weight) of the container 41 of the earth/sand feeder 4 in an unloaded state (unstored state) of earth and sand. It outputs an electric signal corresponding to the weight (already loaded weight) of the container 41 of the sand supply device 4 in the loaded state (stored state). The calculation unit 62 of the earth and sand weighing device 6 converts the electric signals of the unloaded weight and the already loaded weight output from the load sensor 61 into weight measurement values, and calculates the difference value between the unloaded weight and the already loaded weight. Then, the calculation result is output as the measured value of the weight of the earth and sand. The display unit 63 of the earth and sand weighing device 6 displays the measured value of the earth and sand weight output from the calculation unit 62 on the display unit 63 to present it to the operator. In addition, by filling the container 41 of the earth/sand supply device 4 with earth and sand until the measured value displayed on the display unit reaches the required weight of the earth/sand, the earth/sand supply device 4 can be accurately filled with the required weight of earth and sand. It will have been put in.

Further, according to the improving material weighing device 7, when the weight sensor 71 mounted on the improving material supplying device 5 receives the weight of the storage container 51 of the improving material supplying device 5 by its loading portion 71a, the received weight is measured. It is weighed by the detector 71b. For example, according to the improving material weighing device 7, when measuring the weight of the improving material using the weight sensor 71, first, the container 51 of the improving material supply device 5 in the unloaded state (unaccommodated state) of the improving material. The weight (unloaded weight) is detected, and the weight (already loaded weight) of the container 51 in which the improved material is loaded (accommodated) is detected, and the difference value between the unloaded weight and the already loaded weight is calculated. A calculation is performed, and the calculation result is output as a measured value of the weight of the improved material. The display unit 73 of the improving material weighing device 7 displays the measured value of the weight of the improving material output from the calculation unit 72 on the display unit 73 to present it to the worker or the like. Then, by putting the improving material into the storage container 51 of the improving material supply device 5 until the measured value displayed on the display unit 73 reaches the required mixing weight of the improving material, the improving material supplying device 5 is supplied with the required mixing weight. It means that the improved material was put in correctly.

<Improved earth and sand, earth and sand, improvement material, simple soil improvement method>
Next, referring to FIG. 5, a soil improvement method using the soil improvement system 1 configured as described above will be described below. In addition, soil and soil improvement materials used for generating improved soil by this soil conditioning system 1 will also be described.

<Improved earth/sand/Improvement material>
First, soil materials (hereinafter also simply referred to as “earth and sand” or “soil”) are classified into categories based on observation and particle size in the Geotechnical Standards “Engineering Classification of Soil Materials” (JGS0051-2000). be. Here, the term "coarse-grained soil" refers to a soil material containing more than 50% of sand or gravel in terms of particle size (grain size). Further, the fine-grained soil refers to a soil material containing more than 50% of the composition ratio of clay or silt having a particle size of less than 0.075 mm. Further, sandy soil (sashitsudo) refers to soil having a fine particle content of less than 50% and a particle size of 2 mm or less among soil belonging to coarse-grained soil. Further, gravelly soil refers to soil that belongs to coarse-grained soil and has a fine particle content of less than 50% and a particle size of 2 mm or more and 75 mm or less.

Cohesive soil refers to fine-grained soil that is sticky according to the soil quality classification. Empirically, when cohesive soil is applied to the fingertips and washed off with water, the soil remains on the fingertips. . Further, cohesive soil is soil that belongs to fine-grained soil, and therefore contains more than 50% of clay and silt components. Silt refers to soil that belongs to fine-grained soil. (Soil mechanics: less than 0.005 mm in diameter (geologically, grain size: 1/256 mm or less)).

The improved soil generated by the soil improvement system 1 is a mixed soil in which the improving material is homogeneously dispersed and mixed in the soil contained in the material to be stirred, and the improving material is dispersed in the soil at a uniform density as a whole. It is preferable that the For example, improved soil includes bentonite-mixed soil in which bentonite as an improvement material is mixed with sandy soil, and zeolite-mixed soil in which zeolite as an improvement material is mixed with sandy soil. In addition, this improved earth and sand will be in a state in which the improvement material is more uniformly mixed in the earth and sand by stirring the material to be stirred containing the earth and sand and the improvement material.

The soil used as a raw material for improved soil (improved soil) is coarse-grained soil that includes sandy soil (including sand) and gravel soil (including gravel) among soil materials, and clay soil is excluded. and Here, the reason why cohesive soil is excluded is that cohesive soil is highly viscous and contains a large amount of water, and therefore, for example, it sticks to the inside of the supply mechanism 42 of the sand supply device 4 or the agitation container 22 of the agitation device 2. Therefore, it becomes difficult to supply and agitate the earth and sand. In addition, if the agitating device 2 is used to uniformly disperse the improvement material in the cohesive soil, it is difficult for the cohesive soil and the improvement material to mix uniformly. This is because the so-called "Kinako rice cake", in which the improved soil clings around the clumps of cohesive soil, deteriorates the quality of the improved soil.

When the soil is sandy soil, the sandy soil preferably has a water content that is drier than the optimum water content. This is because if the water content of the sandy soil exceeds the optimum water content, it will stick to the machine during compaction and will not easily come off, and the compaction condition will deteriorate rapidly, making compaction difficult. Moreover, when the water content of the sandy soil exceeds the optimum water content, the sandy soil clings to the inside of the supply mechanism 42 of the sand supply device 4 and the stirring container 22 of the stirring device 2, causing the sand to be supplied and This is because stirring becomes difficult.

In addition, the improving material is classified into a powder type and a liquid type. Powder improvers include solidifying agents, flocculants, and adsorbents. Solidifying agents include, for example, cement-based materials, lime-based materials, gypsum-based materials, bentonite materials, and zeolites. Liquid modifiers include solidifying agents, flocculants, adsorbents and other modifiers.

<Simple soil improvement method>
According to the soil improvement method of the present embodiment shown in FIG. 5, when generating a predetermined weight of improved soil, it is necessary to put the same volume of material to be stirred as the predetermined weight into the stirring container 22 of the stirring device 2. . The improved soil of a predetermined weight is obtained by stirring the material to be stirred and having the same weight as the improved soil to homogeneously mix the soil and the improving material. The improved soil and the material to be stirred differ in the degree of mixing of the soil and the improvement material, but have the same blending weight ratio (% by weight) of the constituent components of the soil and the improvement material. For example, when the mixing weight ratio of the soil and improvement material contained in the improved soil is 80% by weight of the soil and 20% by weight of the improvement material, the weight ratio of the soil and the improvement material contained in the object to be stirred is also 80% by weight of the soil. % is 20% by weight of the improving material. That is, the mixing weight ratio of the soil and the improving material contained in the improved soil matches the mixing weight ratio of the soil and the improving material contained in the material to be stirred.

For this reason, when producing improved earth and sand containing soil and an improvement material at a predetermined mixing weight ratio, it is necessary to have a material to be stirred containing the earth and sand and an improvement material at the same mixing weight ratio as the improved earth and sand. In other words, when generating a predetermined weight of improved soil, the required weight of soil and sand obtained by multiplying this predetermined weight by the mixing weight ratio of the soil and the required mixing obtained by multiplying this predetermined weight by the mixing weight ratio of the improving material It must be mixed with a weight improver.

Therefore, as shown in FIG. 5, it is necessary to first put the soil in the container 41 of the soil supply device 4 in the required mixing weight, and then put the improving material in the storage container 51 in the improving material supply device 5 in the required mixing weight. . Therefore, the earth and sand weighing step S2 and the improvement material weighing step S4 are executed. In the earth and sand weighing step S2, earth and sand are put into the container 41 of the earth and sand supply device 4 until the weight of the earth and sand reaches the required mixing weight (S1: No, S2). The weight of the earth and sand contained in the container 41 is weighed, and when the necessary mixing weight of earth and sand enters the container 41, the earth and sand weighing step S2 is terminated (S1: Yes). On the other hand, in the improving material weighing step S4, the improving material is put into the storage container 51 of the improving material supply device 5 until the weight of the improving material reaches the required compounding weight (S3: No, S4), and the improving material weighing device 7 The weight of the improving material contained in the container 51 of the material supplying device 5 is weighed, and when the necessary blending weight of the improving material enters the containing container 51, the improving material weighing step S4 is terminated (S3: Yes).

After the earth and sand weighing step S2 and the improving material weighing step S4, the raw material charging step S5 is performed. In the raw material input step S5, both the soil and the improvement material of the required mixed weight weighed in the earth and sand weighing step S2 and the improvement material weighing step S4 are fed by the earth and sand supply device 4 and the improvement material supply device 5 to a pair of upstreams in the transfer device 3. Gradually supply less than the required mixing weight to each of the transfer devices 31, 31 (earth/improvement material supply step S51). Each upstream transfer device 31 to which the earth and sand and the improvement material are supplied little by little gradually transfers the earth and sand and the improvement material little by little from the upstream side in the transfer direction to the downstream side (upstream transfer step S52), and the downstream end in the transfer direction The earth and sand and the improvement material are dropped from the part to the downstream transfer device 32 (temporary mixing step S53). Due to this drop, the earth and sand and the improvement material are transferred to the downstream transfer device 32, transferred from upstream to downstream in the transfer direction of this downstream transfer device 32, and gradually stirred by the stirring device 2 in small amounts than the required blending weight. It is put into the container 22 from the inlet 23 (downstream transfer step S54).

Here, during the execution of the raw material charging step S5, the preliminary stirring step S55 by the stirring device 2 is also executed at the same time. In this pre-stirring step S55, when the earth and sand and the improving material have been put into the stirring container 22 by the transfer device 3 (S6: No), the stirring container 22 of the stirring device 2 is rotated forward by the stirring driving device 25. , the soil and improvement material to be stirred are stirred and mixed in the stirring container 22, and the normal rotation of the stirring container 22 is continued until the required mixing weight of the soil and improvement material is filled (S6: Yes). do. In this case, the stirring container 22 of the stirring device 2 is driven forward by the stirring driving device 25 at an arbitrary rotation speed from a low speed range to a high speed range.

By executing this pre-stirring step S55, it is possible to encourage the earth and sand and the improvement material to be mixed in a more uniform state from a small amount that does not reach the required blending weight, and as a result, the required blending weight The time required for finishing all of the earth and sand and the improvement material to a more uniformly mixed state, that is, the time required for the stirring step S7, can be shortened. Even if it takes only a short time to arrive at the place where the soil is provided, it becomes easy to complete the generation of the improved soil during that time.

All of the required blended weight of soil and improvement material is supplied to the transport device 3 by the soil supply device 4 and the improvement material supply device 5, and the required blend weight of the soil and improvement material is all stirred in the stirring device 2 by the transfer device 3. If the raw materials have been put into the container 22 (S6: Yes), the raw material introduction step S5 (including the preliminary stirring step S55) ends. After the raw material charging step S5 (including the preliminary stirring step S55) is completed, the stirring step S7 is continuously performed without stopping the forward rotation of the stirring container 22. In this stirring step S7, the stirring container 22 of the stirring device 2 is subsequently driven to rotate forward by the stirring driving device 25, and the stirring container 22 is rotated to stir the object to be stirred in the stirring container 22. The earth and sand and the improvement material contained in the agitated material are mixed so as to be more uniformly mixed with each other. In this stirring step S7, by rotating the stirring container 22 at high speed until a certain period of time (for example, about 10 minutes) has elapsed after the start of this stirring step S7 (S8: No), the earth and sand and the improvement material are made more uniform with each other. Transforms into improved soil mixed with

The transportation step S9 is started after the stirring step S7 is continued for a certain period of time (S8: Yes), but the stirring step S7 is continuously performed even during the transportation step S9. Specifically, in the transportation step S9, the rotation speed of the stirring vessel 22 in the stirring step S7 is reduced, and the stirring vessel 22 is forwardly rotated at a low rotation speed suitable for the movement of the stirring device 2 by the traveling body 21. By doing so, while continuing the stirring of the material to be stirred in the stirring step S7, the running body 21 provided in the stirring device 2 is run, and the stirring device 2 is moved from the soil improvement base to the improved soil providing place, The improved earth and sand stored in the stirring container 22 of the stirring device 2 is transported to the providing place (S10: No). By this transportation, the agitating device 2 is directly moved to the provision place of improved earth and sand, and the improved earth and sand is directly transported from the agitating device 2 to the providing place. The transportation step S9 ends when the stirring device 2 arrives at the place of provision (S10: Yes).

The discharge step S11 is performed at the end of the transportation step S9. In this discharge step S11, the stirring step S7, which continued during the transportation step S9, is finished, and the improved soil is discharged from the stirring container 22 of the stirring device 2 and supplied to the providing place. Specifically, when the mixer track is the stirring device 2, the forward rotation of the stirring vessel 22 by the stirring driving device 25 is temporarily stopped, and then the stirring vessel 22 is again driven in the reverse direction by the stirring driving device 25. The improved soil is discharged from the discharge port 24 of the agitating container 22 and supplied to the providing place. When the supply of the prescribed weight of improved earth and sand from the stirring container 22 to the supply location is finished, or when the required weight of improved earth and sand is finished being supplied, the discharge step S11 is completed. In addition, when retransporting the improved earth and sand to another providing place, once the discharging step S11 is finished, while the stirring step S7 is performed again, the transporting step S9 is performed to the next providing place. After that, the stirring step S7 is finished, and the discharge step S11 is restarted.

In the return step S12, the traveling body 21 provided in the agitating device 2 is caused to travel to return the agitating device 2 from the improved earth and sand supply location to the soil improvement base. When the stirring device 2 is returned to the soil improvement base, the traveling body 21 is moved to position the inlet 23 of the stirring device 2 under the transfer direction downstream end of the transfer device 3, and the raw material charging step S5, The stirring step S7, the transportation step S9, the discharging step S11, and the returning step S12 are repeatedly performed. Moreover, the earth and sand weighing process S2 and the improving material weighing process S4 can be performed while the transportation process S9, the discharging process S11, and the returning process S12 are being performed.

Here, while the earth and sand and the improvement material are supplied to the set of the earth and sand supply device 4 and the improvement material supply device 5 and the earth and sand weighing step S2 and the improvement material weighing step S4 are performed, another set of earth and sand is supplied. Using the supply device 4, the improvement material supply device 5, and the transfer device 3, the raw material charging step S5 and the preliminary stirring step S55 can be performed. Moreover, while the stirring step S7 is being performed in one stirring device 2, the raw material charging step S5 can be performed in another stirring device 2.

<Effects of this embodiment>
As described above, according to the soil improvement system 1 of the present embodiment, when the stirring device 2 is a mixer truck and the stirring vessel 22 is a mixing drum, the stirring device 2 uses the stirring vessel 22 to perform a predetermined Since the weight (predetermined volume) of the object to be stirred is stirred by batch mixing, the improved soil can be produced in an amount corresponding to the volume of the stirring container 22 . Therefore, a large amount of improved soil is not generated unnecessarily, and wasteful disposal of improved soil that is no longer needed can be prevented. In addition, since only the material to be stirred having a predetermined weight that can be accommodated in the stirring container 22 (for example, several tons to several tens of tons in a mixer truck) is stirred and mixed, uneven mixing due to insufficient stirring is unlikely to occur, and soil and improvement materials are not easily generated. can be uniformly mixed with each other.

Moreover, since the stirring container 22 of the stirring device 2 is a mixing drum of a mixer truck with airtightness, when the material to be stirred is mixed in the stirring container 22, the material to be stirred will be dust outside the stirring container 22. It is possible to prevent it from scattering. In addition, even if a very small amount of improved soil is required because the place where improved soil is provided is narrow, if the required extremely small amount is within the storage capacity of the stirring container 22, the extremely small amount Since the combined amount of improved soil can be easily generated, it is possible to reduce the amount of improved soil that remains in a large amount and causes construction (placement) losses. Moreover, by increasing or decreasing the number of agitating devices 2, ie, the number of mixer trucks, according to the situation, the amount of improved earth and sand to be provided (the amount of construction) can be easily adjusted.

Since the weight of the soil and improvement material contained in the storage containers 41 and 51 of the earth and sand supply device 4 and the improvement material supply device 5 is weighed, the necessary mixing weight of the earth and sand and improvement material is weighed, and then these earth and sand and improvement material are weighed. to the storage containers 41 and 51 of the earth and sand supply device 4 and the improvement material supply device 5, respectively. In addition, it is possible to prevent variations from appearing each time stirring and mixing, and it is possible to generate better quality improved soil.

In addition, since the weight of the soil and the improvement material contained in the storage containers 41 and 51 of the soil supply device 4 and the improvement material supply device 5 is measured, the required mixing weight of the improvement material suitable for the weight of the soil is calculated. Since it can be supplied to the stirring device 2 via the transfer device 3 by the supply device 5, uneven addition of the improving material can be prevented, and the mixing weight ratio of the earth and sand and the improving material can be optimized. Further, since the earth and sand supply device 4, the improvement material supply device 5, the transfer device 3, the earth and sand weighing device 6, and the improvement material weighing device 7 are portable, the soil improvement system 1 can be easily moved, assembled, and dismantled. can be done.

Compared to the existing self-propelled soil improvement machine, the soil improvement system 1 can transport the improved soil by moving the stirring device 2 with the traveling body 21 while stirring the material to be stirred, so that the moving time can be reduced. This can be used as a stirring time, and a sufficient stirring time can be secured, and as a result, uneven mixing of the soil and the improvement material due to insufficient stirring can be greatly improved, and the soil and the improvement material become more uniform with each other. Produces mixed quality improved soil.

In addition, unlike the existing self-propelled soil improvement machine, it is possible to simultaneously generate improved soil by stirring the material to be stirred by the stirring device 2 and transport and transport the improved soil by the traveling body 21 of the stirring device 2. In addition, it is not necessary to reload the improved earth and sand after production to a freight vehicle such as a dump truck for transportation, the time required for such reloading can be reduced, and the lead time associated with the provision of the improved earth and sand can be further shortened.

In addition, unlike the existing self-propelled soil improvement machine, the agitating device 2 equipped with a traveling body 21 such as a mixer truck is used for transportation of the improved soil, and a freight vehicle such as a dump truck is not used. Therefore, when the improved soil is unloaded from the dump truck, it is possible to prevent the improved soil from being scattered and mixed with the surrounding soil, making it impossible to separate and causing loss. In addition, there is no need to temporarily store the generated improved soil in an outdoor stockyard or the like, unlike the conventional self-propelled soil improvement machine, and the temporarily placed improved soil is discarded without permission. can be prevented.

In addition, although the soil improvement system 1 is a simple soil improvement system 1 that can be configured by combining existing general-purpose devices, the quality of the improved soil generated by the simple soil improvement system 1 is It was confirmed that high quality equivalent to improved soil produced by a batcher plant, which is also a general device for producing improved soil, could be secured.

The mixer truck as the stirring device 2 stirs the material to be stirred contained in the mixing drum for about 10 minutes, and the soil and sand contained in the material to be stirred and the improvement material are uniformly mixed to a sufficient quality. It can be commercialized as improved soil.

In this way, the improved earth and sand can be generated only by stirring the earth and sand of the material to be stirred and the improved material as the stirring device 2 by rotating the mixing drum of the mixer truck. S9, S10: No) During the process, the stirring step S7 necessary for generating the improved soil can be performed at the same time, and the lead time can be shortened.

In addition, since the transfer device 3 is a belt conveyor type transfer device 3, the earth and sand and the improvement material placed on the transfer belt 3a are conveyed to the stirring container 22 of the stirring device 2, and the stirring container 22 is put into the stirring container 22. The object to be stirred containing the earth and sand and the improvement material is dropped into the port 23 and put into the stirring container 22 from the inlet 23. Since the soil and improvement material are put in little by little over time, the earth and sand and improvement material become dust compared to the conventional method, in which the necessary mixing weight of the soil and improvement material is divided into several times and a large amount is added at a time with a large heavy machine. can be prevented from scattering.

<Second embodiment><Preliminary mixing by drop collision from upstream transfer device>
Next, a soil improvement system 200 according to a second embodiment will be described with reference to FIGS. 6 and 7. FIG.

FIGS. 6 and 7 are explanatory diagrams relating to the soil improvement system 200 of the second embodiment, and illustrate changes to the soil improvement system 1 of the first embodiment. FIG. 6 is a plan view, and FIG. 7A is a side view, and FIG. 7A is a partially enlarged view of a pair of upstream transfer devices 31, 31 showing a state where the falling paths of earth and sand and improvement material (see the two-dot chain line arrows in the figure) intersect. FIG. 7(b) is a partially enlarged view of the pair of upstream transfer devices 31, 31 showing a state in which the falling paths of earth and sand and improvement material (see the two-dot chain line arrows in the figure) are overlapped. . In FIGS. 6 and 7, some parts are omitted for the sake of convenience, and the same parts as those of the soil improvement system 1 of the first embodiment are denoted by the same reference numerals. and the description is omitted.

As shown in FIG. 6, the pair of upstream transfer devices 31, 31 in the transfer device 3 are provided on both sides of the downstream transfer device 32 in the direction perpendicular to the transfer direction, with the downstream transfer device 32 sandwiched therebetween. The pair of upstream transfer devices 31, 31 are arranged with their downstream ends in the transfer direction spaced apart from each other, and their downstream ends in the transfer direction face each other directly in front of each other. . Therefore, the earth and sand and the improvement material separately dropped from the pair of upstream transfer devices 31 , 31 collide in the air while they are falling and are transferred to the downstream transfer device 32 .

As shown in FIG. 7, the arrangement position of the pair of upstream transfer devices 31, 31 is the fall path of soil and improvement material falling from the pair of upstream transfer devices 31, 31 to the downstream transfer device 32 (see FIG. 7). ) are set so as to intersect or overlap each other. Therefore, the soil and improvement material falling from one upstream transfer device 31 collide with the earth and sand and improvement material falling from the other upstream transfer device 31 in the middle of the drop path toward the downstream transfer device 32. The impact accompanying the collision promotes the mixing of the earth and sand with the improvement material, making it easier for the improvement material to mix into the earth and sand.

<Third Embodiment><Preliminary Mixing by Drop Obstacle Member>
Next, a soil improvement system 300 according to a third embodiment will be described with reference to FIGS. 8 and 9. FIG.

FIGS. 8 and 9 are explanatory diagrams relating to the soil improvement system 300 of the third embodiment, showing modified parts of the soil improvement system 1 of the first embodiment, FIG. 8 being a plan view, and FIG. 9(a) is a partially enlarged view of one upstream transfer device 31, and FIG. 9(b) is a partially enlarged view of the other upstream transfer device 31. FIG. In FIGS. 8 and 9, for the sake of simplification of the drawings, some parts are omitted as appropriate, and the same parts as those of the soil improvement system 1 of the first embodiment are denoted by the same reference numerals. and the description is omitted.

As shown in FIG. 8, the drop obstructing member 310 is located on the downstream side of the upstream transfer device 31 in the transfer direction, where the material to be stirred falls from the upstream transfer device 31 (surrounded by a two-dot chain line square in the drawing). ), that is, at the downstream end of the upstream transfer device 31 in the transfer direction. The fall obstruction member 310 has an opening 311 through which the earth and sand and the improvement material pass, and the remaining part of the falling path of the earth and sand and the improvement material (see the two-dot chain line arrow in the figure). is a blocking portion 312 that collides with earth and sand and improvement material to prevent their falling. The fall obstruction member 310 of this embodiment is a net-like body. In this net-like body, a plurality of grid members for colliding with earth and sand and improvement material serve as closed portions 312, and meshes provided between the plurality of grid members through which earth and sand and improvement material pass and fall serve as openings 311. It is.

As shown in FIG. 9, the drop obstructing member 310 does not cover the entire drop path of the object to be stirred that drops from the upstream transfer device 31, but an opening 311 through which earth and sand and improvement material pass. , the remaining portion is present as the blocking portion 312 against which the earth and sand and the improvement material collide. And the improvement material can be dropped to the downstream transfer device 32, and by colliding with this blocking part 312, mixing of the soil and the improvement material is further promoted, and the improvement material is more easily mixed into the earth and sand. . In addition, the earth and sand and the improvement material that have collided with the closing portion 312 can pass through the opening portion 311 adjacent to the closing portion 312 and fall.

Note that the form of the fall obstruction member 310 is not necessarily limited to a net-like body, and a part thereof is an opening or space through which earth and sand and the improvement material pass, and the remaining part collides with the earth and sand and the improvement material. For example, it may be a rod-shaped or plate-shaped member provided in a part of the dropping path of the earth and sand and the improvement material, as long as it is a member that obstructs the falling of the material. In addition, in the case of a rod-shaped member, it is made into a round bar so that the soil and improvement material that collide with these rod-shaped or plate-shaped members will not remain on the member and will easily fall again. In the case of a plate-shaped member, it is preferable to provide it in an inclined posture so that the earth and sand and the improvement material can slide down on the upper surface.

According to the soil improvement system 300 of the third embodiment, the soil and improvement material falling from the pair of upstream transfer devices 31, 31 respectively collide with the drop obstruction member 310 in the middle of the drop path toward the downstream transfer device 32. By doing so, the soil is stirred and then dropped again toward the downstream transfer device 32 and received by the conveyor belt 3a of the downstream transfer device 32, so that the improvement material is more easily mixed into the earth and sand.

<Fourth Embodiment><Portable Weight Sensor for Soil Weighing Device/Improvement Material Weighing Device>
Next, a soil improvement system 400 according to a fourth embodiment will be described with reference to FIGS. 10 and 11. FIG.

FIGS. 10 and 11 are explanatory diagrams relating to a soil improvement system 400 of the fourth embodiment, showing modified parts of the soil improvement system 1 of the first embodiment, FIG. 10 being a plan view, and FIG. is a side view. 10 and 11, for the sake of convenience in drawing simplification, some parts are omitted as appropriate, and the same parts as those of the soil improvement system 1 of the first embodiment are denoted by the same reference numerals. and the description is omitted.

As shown in FIG. 10, according to the soil improvement system 400 of the fourth embodiment, the soil weighing device 460 and the improvement material weighing device 470 are both used as portable truck scales, unlike the first embodiment. Portable weight sensors 461 and 471 are provided. The weight sensors 461 and 471 are installed on the base member 8 described above, and the weight sensors 461 and 471 are supported by the base member 8 on the installation ground.

Here, the soil weighing device 460 includes a weight sensor 461 having a loading portion 461a that receives the weight of the entire soil supply device 4 and a detection portion 461b that detects the weight applied to the loading portion 461a. The sand supply device 4 is always placed on the loading portion 461 a of the sensor 461 . The improving material weighing device 7 also includes a weight sensor 471 having a loading portion 471a for receiving the weight of the entire improving material supply device 5 and a detecting portion 471b for detecting the weight applied to the loading portion 471a. The improving material supply device 5 is always placed on the loading portion 471 a of the weight sensor 471 .

Furthermore, the earth and sand weighing device 460 and the improvement material weighing device 470, in addition to the loading portions 461a, 471a and the detecting portions 461b, 471b included in the weight sensors 461, 471, use the electric signals input from the detecting portions 461b, 471a to measure the weight. Arithmetic units 462 and 472 that convert the measured value into a measured value, execute various arithmetic processing using the measured value, and output the measured value or the result of the calculation, and the measured value or calculation input from the arithmetic units 462 and 472. Display units 463 and 473 for displaying results are provided. Here, the weight detection results by the detection units 461b and 471b of the weight sensors 461 and 471 are transmitted to the calculation units of the soil weighing device 460 and the improvement material weighing device 470 via wired or wireless communication units 464 and 474 (not shown). 462, 472. The calculation units 462, 472, the display units 463, 473, and the communication units 464, 474 of the soil weighing device 460 and the improvement material weighing device 470 are external devices such as computers having a communication device such as a PC and a display device. Alternatively, it may be an internal device incorporated in the weight sensors 461 and 471 .

According to the earth and sand weighing device 460, the weight sensor 461 mounted with the earth and sand supply device 4 receives the weight of the earth and sand supply device 4 as a whole by its loading portion 461a, and the detection portion 461b detects the weight received by the loading portion 461a. It outputs an electrical signal corresponding to its size. For example, the detection unit 461b of the weight sensor 461 outputs an electric signal corresponding to the weight (unloaded weight) of the entire earth and sand supply device 4 in an unloaded state (unaccommodated state) of earth and sand. It outputs an electric signal corresponding to the weight of the entire earth/sand supply device 4 (already loaded weight) in the housed state. The calculation unit 462 of the earth and sand weighing device 460 converts the electric signals of the unloaded weight and the already loaded weight output from the detection unit 461b into weight measurement values, and calculates the difference value between the unloaded weight and the already loaded weight. Then, the calculation result is output as the measured value of the weight of the earth and sand. The display unit 463 of the earth and sand weighing device 460 presents the measured value of the weight of the earth and sand output from the calculation unit 462 to the operator or the like. Then, when the earth and sand are put into the container 41 of the earth and sand supply device 4 until the measured value displayed on the display unit 463 becomes the required weight of the earth and sand, the earth and sand supply device 4 is accurately filled with the necessary weight of the earth and sand. I have entered.

According to the improving material weighing device 470, the weight sensor 471 mounted with the improving material supplying device 5 receives the weight of the entire improving material supplying device 5 by its loading portion 471a, and the weight of the improving material supplying device 5 is received by the loading portion 471a by its detecting portion 471b. It outputs an electric signal corresponding to the size of the weight. For example, the detection portion 471b of the weight sensor 471 outputs an electric signal corresponding to the overall weight (unloaded weight) of the improving material supply device 5 when the improving material is not loaded (not accommodated). It outputs an electric signal corresponding to the total weight (already loaded weight) of the improvement material supply device 5 in the loaded state (accommodated state). The calculation unit 472 of the improved material weighing device 470 converts the electric signals of the unloaded weight and the already loaded weight output from the detection unit 471b into weight measurement values, and calculates the difference value between the unloaded weight and the already loaded weight. A calculation is performed, and the calculation result is output as a measured value of the weight of the improved material. The display unit 473 of the improving material weighing device 470 displays the measured value of the weight of the improving material output from the calculation unit 472 on the display unit 473 to present it to the operator. When the improving material is put into the storage container 51 of the improving material supply device 5 until the measured value displayed on the display unit 473 reaches the required mixing weight of the improving material, the improving material supplying device 5 is supplied with the required mixing weight. It means that the improvement material was entered correctly.

<Fifth Embodiment><Material Supply Device/Material Weighing Device>
Next, a soil improvement system 500 according to a fifth embodiment will be described with reference to FIGS. 12 and 13. FIG.

FIGS. 12 and 13 are explanatory diagrams relating to a soil improvement system 500 of the fifth embodiment, showing modified parts of the soil improvement system 1 of the first embodiment, FIG. 12 being a plan view, and FIG. is a side view. 12 and 13, some parts are appropriately omitted for the sake of simplification of the drawings, and the same parts as those of the soil improvement system 1 of the first embodiment are denoted by the same reference numerals. and the description is omitted.

As shown in FIGS. 12 and 13, the raw material supply device 510 includes a supply mechanism 512 that supplies the material to be stirred upstream of the position of the stirring vessel 22 in the transfer direction of the transfer device 3, and a supply mechanism 512 that supplies the material to be stirred. A storage container 511 capable of storing together the earth and sand contained in the object to be stirred and the improving material supplied by the mechanism 512 is provided. Also, the raw material weighing device 520 measures the weight of the earth and sand and the improved soil contained in the container 511 of the raw material supply device 510 . In other words, the soil improvement system 500 of the fifth embodiment includes the raw material supply device 510 and the raw material weighing device 520 for the soil and improvement material, respectively, while the soil improvement system 1 of the first embodiment includes the soil and improvement material. and a raw material measuring device 520 for collectively weighing the earth and sand and the improving material.

The storage container 511 of the raw material supply device 510 is a storage tank having an inlet 511a and an outlet 511b for the soil and improvement material, and the supply mechanism 512 of the raw material supply device 510 is discharged from the outlet 511b of the storage container 511. A screw valve 512a is provided to adjust the weight of the modifier by the amount of rotation of the screw rotated by the drive motor. Therefore, according to this raw material supply device 510, since the supply mechanism 512 uses the screw valve 512a, the rotation of the screw of this screw valve 512a can be used to mix the earth and sand and the improvement material more or less, and the transfer device. The earth and sand and the improvement material supplied are in a state in which the improvement material is caught in the earth and sand, and scattering of the improvement material can be suppressed.

For this reason, the earth and sand and the improvement material are put into the same storage container 511 of the same raw material supply device 510 by the required blending weight, respectively, and the earth and sand and the improvement material are put together from the storage container 511 into the same supply mechanism 512 of the same raw material supply device 510. are fed together to the transfer device 3 using . Further, the weight of the earth and sand and the improvement material stored in the storage container 511 of the raw material supply device 510 is sequentially measured by the raw material weighing device 520 . For example, the weight of the storage container 511 of the raw material supply device 510 with no earth and sand and improvement material loaded (unloaded weight) and the weight of the storage container 511 with earth and sand loaded (loaded with earth and sand) The difference value is used as the measured value of the weight of the earth and sand, and the earth and sand are put into the storage container 511 until the measured value of the weight of the earth and sand reaches the required mixing weight. Then, the weight of the container 511 of the raw material supply device 510 containing the required mixing weight of soil (required mixing weight of soil) and the weight of the container 511 containing the improving material (improving material Loaded weight) is used as the measured value of the weight of the improving material, and the improving material is put into the storage container 511 until the measured value of the weight of the improving material reaches the required compounding weight. As a result, one storage container 511 can store the soil and sand and the improvement material by their required blending weights.

In addition, the raw material weighing device 520 includes a weight sensor 521 having a loading portion 521a that receives the weight of the container 511 of the raw material supply device 510, and a detection portion 521b that detects the weight applied to the loading portion 521a, This weight sensor 521 is mounted on the raw material supply device 510 .

The raw material weighing device 520 converts an electrical signal input from the detecting unit 521b in addition to the loading unit 521a and the detecting unit 521b included in the weight sensor 521 into a weighed value of weight, and uses the weighed value for various arithmetic processing. and a calculation unit 522 for outputting the measured value or the calculated result, and a display unit 523 for displaying the measured value or the calculated result input from the calculation unit 522 . Here, the weight detection result by the detection unit 521b of the weight sensor 521 is input to the calculation unit 522 of the soil weighing device 6 and the improvement material weighing device 7 via a wired or wireless communication unit 524 (not shown). The calculation unit 522, the display unit 523, and the communication unit 524 of the raw material weighing device 520 may be an external device such as a computer having a communication device such as a PC and a display device, or may be incorporated in the weight sensor 521. It may be an internal device.

The present invention has been described above based on the embodiments, but the present invention is not limited to the above-described embodiments, and it is easily understood that various modifications and improvements are possible without departing from the scope of the present invention. It can be inferred.

For example, the transfer devices 3, 31, and 32 are not necessarily limited to belt conveyor transfer devices. It may be a bucket conveyor transfer device using a body. Further, the transfer device may be a screw conveyor transfer device that transfers the object to be stirred by a rotating screw.

1,200,300,400,500 Soil improvement system (simple soil improvement system)
2 Stirrer (traveling type stirrer)
21 Running body 22 Stirring vessel (closed stirring vessel)
23 Inlet (inlet of stirrer)
24 outlet (discharge of agitator)
25 drive device (drive device for stirring device)
3 transfer device 31 upstream transfer device (part of transfer device)
32 downstream transfer device (part of transfer device)
4 earth and sand supply device 41 container 42 of earth and sand supply device supply mechanism 5, 5 of earth and sand supply device improvement material supply device 51 container 52 of improvement material supply device supply mechanism 6 of improvement material supply device earth and sand weighing device 61 earth and sand weighing device Load sensor 61a Load sensor loading unit 61b of soil weighing device Load sensor detection unit 7 of soil weighing device Improving material weighing device 71 Load sensor 71a of improving material weighing device Loading unit 71b of load sensor of improving material weighing device Measuring improved material Detection unit 310 of load sensor of device Fall obstruction member 461 Portable load sensor 461a of earth and sand weighing device Loading unit 461b of portable load sensor of earth and sand weighing device Detection unit 471 of portable load sensor of earth and sand weighing device Improved material Portable load sensor 471a of the weighing device Loading portion 471b of the portable load sensor of the improved material weighing device Detecting portion 510 of the portable load sensor of the improved material weighing device Raw material supply device 511 Storage container 512 of the raw material supply device Raw material supply Device supply mechanism 520 Raw material weighing device 521 Load sensor 521a of the raw material weighing device Loading unit 521b of the load sensor of the raw material weighing device Load sensor detection unit S2 of the raw material weighing device process)
S7 Stirring step S9 Transportation step

Claims (12)

Coarse-grained soil (however, in the case of sandy soil, the water content of the sandy soil is in a state drier than the optimum water content; the same shall apply hereinafter. Hereinafter simply referred to as "earth and sand.") and powdery improving material (hereinafter simply referred to as " In a simple soil improvement system that generates improved soil mixed with
A running and moving type stirring device having a running body having a power source and a closed stirring container mounted on the running body and containing and stirring a material to be stirred containing earth and sand and an improvement material;
a transfer device for transferring the object to be stirred from a position remote from the stirring container of the stirring device to the stirring container;
an earth and sand supply device having a supply mechanism for supplying earth and sand upstream in the transfer direction from the position of the agitation container to the transfer device and a container capable of accommodating the earth and sand supplied by the supply mechanism;
A supply mechanism for supplying the improvement material to the transfer device to which the earth and sand are supplied by the earth and sand supply device on the upstream side in the transfer direction from the position of the stirring vessel, and a storage container capable of containing the improvement material supplied by the supply mechanism. A improving material supply device having
an improver weighing device for measuring the weight of the improver contained in the container of the improver supply device;
an earth and sand weighing device for weighing the earth and sand contained in the container of the earth and sand supply device ;
The stirring device includes an automobile as the traveling body, a mixing drum as the closed stirring container rotatably mounted in the automobile, and a material to be stirred into the mixing drum by the transfer device. an outlet for discharging the improved earth and sand from the mixing drum; and for stirring the material to be stirred introduced from the inlet, the mixing drum is driven to rotate forward, and the material to be stirred is discharged from the outlet. A simple soil improvement system characterized by being a mixer truck provided with a driving device for driving the mixing drum in reverse to perform mixing . The transfer device includes an upstream transfer device that receives the earth and sand and the improvement material supplied by the supply mechanism of the earth and sand supply device and the improvement material supply device and transfers them downstream in the transfer direction, and a downstream side in the transfer direction of the upstream transfer device. 2. A simple soil improvement system according to claim 1, further comprising a downstream transfer device for receiving the earth and sand and the improvement material that have fallen from the soil and transferring them as objects to be stirred toward the stirring vessel of the stirring device. The transfer device includes a pair of upstream transfer devices to which the soil and improvement material are respectively supplied from the earth and sand supply device and the improvement material supply device,
The earth and sand supply device and the improvement material supply device are a set of the earth and sand supply device and the improvement material supply device that supply earth and sand and the improvement material to one of the pair of upstream transfer devices, and the other of the pair of upstream transfer devices. 3. The simple soil improvement system according to claim 2, further comprising another set of earth and sand supply device and improvement material supply device for supplying earth and sand and improvement material to the soil. The transfer device continuously transfers the object to be stirred to the stirring container of the stirring device,
4. The earth and sand supply device and the improvement material supply device according to any one of claims 1 to 3, wherein the supply mechanism continuously supplies the earth and sand and the improvement material to the transfer device. A simple soil improvement system. The earth and sand weighing device comprises a loading section for receiving the weight of the storage container of the earth and sand supply device, and a load sensor having a detecting section for detecting the weight applied to the loading section,
The improver weighing device comprises a loading unit for receiving the weight of the storage container of the improver supply device, and a load sensor having a detection unit for detecting the weight applied to the loading unit,
The earth and sand supply device is equipped with the load sensor of the earth and sand weighing device,
5. The simple soil improvement system according to any one of claims 1 to 4, wherein the improvement material supply device is equipped with the load sensor of the improvement material weighing device. The stirring vessel of the stirring device has an inlet for charging the material to be stirred inside the stirring vessel, and the opening area of the inlet is narrower than the maximum cross-sectional area of the stirring vessel. The simple soil improvement system according to any one of claims 1 to 5 . The transfer device includes a pair of upstream transfer devices to which the soil and improvement material are supplied from the earth and sand supply device and the improvement material supply device, respectively, and the earth and sand fall from the pair of upstream transfer devices to the downstream transfer device. The simple soil improvement according to any one of claims 2, 3, or claims 4 to 6 depending on claim 2 or 3, wherein the falling paths of the soil and the improving material intersect or overlap each other. system. A drop obstructing member is provided on the downstream side of the upstream transfer device in the transfer direction and on a part of the drop path of the object to be stirred that drops from the upstream transfer device, and collides with the object to be stirred passing through the drop route. 8. A simple soil improvement system according to claim 2, claim 3, or any one of claims 4 to 7 depending on claim 2 or 3, characterized in that: The earth and sand weighing device comprises a loading section on which the earth and sand supply device is placed, and a portable load sensor comprising a detecting section for detecting the weight applied to the loading section,
The improving material weighing device is characterized by comprising a portable load sensor having a loading section on which the improving material supply device is placed and a detecting section for detecting a weight applied to the loading section. The simple soil improvement system according to any one of claims 1 to 8 . Instead of the soil supply device and the improvement material supply device, a supply mechanism that supplies the material to be stirred upstream in the transfer direction from the position of the stirring container with respect to the transfer device, and a material to be stirred that is supplied by the supply mechanism. Equipped with a raw material supply device having a storage container that can collectively store the soil and improvement material contained,
10. A raw material weighing device for weighing the soil and improved soil contained in the container of the raw material supply device is provided in place of the earth and sand weighing device and the improvement material weighing device. Simple soil improvement system according to any one of. Coarse-grained soil (however, in the case of sandy soil, the water content of the sandy soil is in a state drier than the optimum water content; the same shall apply hereinafter. Hereinafter simply referred to as "earth and sand.") and powdery improving material (hereinafter simply referred to as " In a simple soil improvement method for generating a predetermined weight of improved soil by mixing the required blending weight with the soil improvement material,
A sediment weighing step of measuring a required mixing weight of sediment with a weighing device in a state where the sediment is stored in a storage container of a supply device;
an improver weighing step of measuring the improver with a required blending weight by a weighing device in a state where the improver is contained in the container of the supply device;
The required mixing weight of soil and improvement material weighed by the earth and sand weighing step and the improvement material weighing step is supplied to the transfer device by the supply device, and the transfer device gradually seals the agitating device in smaller amounts than the required mixing weight. A step of putting into a stirring vessel of the mold;
a stirring step of generating a predetermined weight of improved soil by stirring with the stirring device the material to be stirred containing the required mixing weight of the soil and the improvement material put into the stirring container by the charging step;
a transportation step of transporting the agitating device to a location where improved soil is provided by traveling with a traveling body provided in the agitating device during the agitating step ;
The stirring device includes an automobile as the traveling body, a mixing drum as the closed stirring container rotatably mounted in the automobile, and a material to be stirred into the mixing drum by the transfer device. an outlet for discharging the improved earth and sand from the mixing drum; and for stirring the material to be stirred introduced from the inlet, the mixing drum is driven to rotate forward, and the material to be stirred is discharged from the outlet. A simple soil improvement method, characterized in that the mixer truck is provided with a driving device for driving the mixing drum in reverse direction for the mixing drum . In the earth and sand weighing step, the weight of the earth and sand contained in the container of the supply device is weighed by the weighing device while the earth and sand are put into the container of the supply device, and the weighed weight of the earth and sand becomes the required mixing weight. In the case of
In the improving material weighing step, the weight of the improving material contained in the container of the supply device is weighed by the weighing device while the improving material is put into the container, and the weighed weight of the improving material is required. 12. The simple soil improvement method according to claim 11 , wherein the addition of the improvement material is stopped when the blending weight is reached.

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