JP4086284B2 - Excavation soil treatment equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is a processing apparatus for effectively using excavated soil generated at a construction site, and enables the treated excavated soil to be effectively used as backfill, backfilling, and filling into a cavity. At the same time, a mud mortar having a predetermined strength can be stably produced.
[0002]
[Prior art]
As shown in Fig. 12, as a method to effectively use excavated soil generated in construction work, water is added to the excavated soil in order to obtain workability and fluidity, and further, a solidifying agent such as cement is added to adjust the strength. Thus, mud mortar is manufactured and used for backfilling or the like (Japanese Patent Laid-Open No. 63-233115). Moreover, as shown in the flowchart of FIG. 13, a method is disclosed in which bentonite mud is mixed with excavated soil and interposed between coarse particles to form fluid mud mortar (Japanese Patent No. 2728846). Furthermore, Japanese Patent No. 2834412 discloses that mud mortar is produced by adding water to the excavated sediment and kneading it to reduce the viscosity, and mixing the homogenous soil slurry and cement by separating the soil mass, cobblestone, etc. It is described.
[0003]
[Problems to be solved by the invention]
Excavated soil has various soil qualities depending on the location of the excavated soil, and its properties are not constant and stable, resulting in variations in the strength of mud mortar produced by adding cement, resulting in insufficient strength or more than necessary. In some cases, the strength was developed and it took time for removal, which hindered subsequent processes. Therefore, in the invention according to Japanese Patent No. 2728846, it has been proposed to stabilize the quality by adding muddy water adjusted in specific gravity containing a lot of fine particles to excavated soil.
[0004]
In addition, when the small soil block is mixed in the excavated soil, the small soil block is easily crushed and does not function as an aggregate, and the mud mortar may be broken from the small soil block. Further, the excavated soil by the muddy construction method has a problem that the bentonite film is formed on the surface of the soil particles and becomes agglomerated and discarded without passing through the vibrating sieve, and the amount of waste increases.
[0005]
In addition, since the excavated soil fluidized by the conventional method uses soil particles of a certain particle size or less, if left untreated, coarse particles and fine particles are separated, and the specific gravity varies greatly depending on the location. Thus, the fluidized excavated soil could not be stored for a long time, and after fluidization, it had to be used within a short time or forcedly mixed with stirring.
[0006]
Therefore, the present invention produces a high-quality one that maintains the strength of the mud mortar because viscosity is generated by grinding the excavated soil with a peptizer and there is no breathing due to the difference in properties of the excavated soil. can, and it is an object to provide a Kezudo processor that drilling space-saving.
[0007]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the present invention classifies excavated soil into fine particles and coarse particles, and pulverizes / peptizers for crushing and peptizing, and slurry for storing fine particles in a slurry state. Excavated soil treatment consisting of an agitator tank, a storage tank for storing coarse particles, a measuring tank for making a slurry-like material with a constant specific gravity by measuring and adding the specific gravity of the slurry agitator tank, and a concrete mixer for producing mud mortar In the equipment, a sieve for classifying excavated soil into fine particles and coarse particles is arranged in a cylindrical shape with a plurality of rods arranged at a predetermined interval to form a drum, and both ends of each rod are attached to the rod attachment tool. Supported by holes, each rod moves and rotates in the hole of the rod fixture, integrates the measuring tank and the concrete mixer, and measures the specific gravity of the slurry in an ultrasonic level meter Specific gravity 1.2 or more Almost a slurry of constant density, is to produce a mud mortar and kneaded by a concrete mixer a predetermined cement to a certain amount of slurry of this constant density.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Preferred embodiments of the present invention will be described below with reference to the drawings.
[0009]
In the embodiment shown in FIG. 1, the excavated soil excavated by the excavator 1 (see FIG. 3) is crushed and peptized and sorted into fine particles (slurry) and coarse particles (soil particles), and then in a slurry state. Is put into a measuring mixer device 10 in which a measuring tank 10A and a concrete mixer 10B are integrated. The slurry is measured by measuring the specific gravity from the weight and volume in the measuring tank 10A, and is made into a slurry having an almost constant specific gravity of 1.2 or more by adding water. The mixture is put into the mixer 10B, and a certain amount of cement is put into the concrete mixer 10B and kneaded with the slurry to produce mud mortar.
[0010]
An ultrasonic level meter is used to measure the specific gravity of the slurry. Conventionally, a capacitance type level meter is used and detection is performed at one point, so that the specific gravity of the slurry is different for each batch, and therefore the amount of water added is also different each time. For this reason, the finished amount of the specific gravity slurry varies from batch to batch, and the amount of cement input is constant. Therefore, the specific gravity of the produced mud mortar varies from batch to batch. On the other hand, by adopting an ultrasonic level meter as in the present invention, the weight and volume of the slurry-like material put into the measuring tank 10A can be grasped in real time, and a fixed amount for each batch. It becomes possible to measure the specific gravity slurry. If a certain amount of cement is mixed with this certain amount of specific gravity slurry, the quality and finished amount of the mud mortar produced will be constant.
[0011]
The strength of mud mortar using excavated soil is proportional to the specific gravity of the slurry-like material mixed with the mud mortar when the amount of cement is constant. However, since the properties of the excavated soil vary greatly depending on the site, if the excavated soil is simply slurried, coarse particles settle over time, and if the mud pump pumps the tank into the mixer, Depending on the position, the concentration of the slurry varies greatly, and the specific gravity expected cannot be obtained. Therefore, the excavated soil is divided into fine particles and coarse particles, and the fine particles are stored as a slurry so that material separation does not occur, and water is added to this to adjust to a specific gravity.
[0012]
FIG. 2 is a diagram showing only the portion of the measurement mixer device 10, and the water is added to the slurry-like material charged from the water tank 11 to the measurement tank 10 A (incorporated in the measurement mixer device 10 in FIG. 2) by the pump 12. Thus, it is shown that a slurry having an almost constant specific gravity of 1.2 or more is obtained. In addition, a fixed amount of cement is measured from the cement silo 13 by the measuring machine 14 with respect to a certain amount of the slurry-like material, and a fixed amount of cement is fed from the discharge gate 15 to the measuring mixer device 10. The cement and the slurry are kneaded by the concrete mixer 10B, and the mud mortar produced from the air cylinder type gate 16 can be taken out.
[0013]
FIG. 3 shows an overall explanatory view. First, excavated soil excavated by the excavator 1 is put into the sieve 2 and sorted into those having a diameter of 40 mm or more and less than 40 mm. Those having a diameter of less than 40 mm are fed from the belt feeder 3 through the belt conveyor 4 to the crushing and peptizer 5 (which is also a classifier for classifying fine particles and coarse particles). Here, those having a diameter of 5 mm or more and those having a diameter of less than 5 mm are selected, and those having a diameter of less than 5 mm are put into a slurry agitator tank 6 as a slurry. The slurry in the agitator tank 6 is sent to the measuring tank 10A of the measuring mixer apparatus 10 by the pump 7. A fixed amount of cement is added to a certain amount of slurry having a specific gravity in the measuring mixer device 10 and kneaded to produce a mud mortar. The mud mortar discharged from the gate 16 is accommodated in the mortar bunker 8, and the mortar bunker The mud mortar in 8 is sent to a mortar placement site by a pressure pump 9. Further, the specific gravity adjusting device 20 is linked to the ultrasonic level meter 21, the cement meter 22 and the load cell 23 of the measuring tank 10 </ b> A.
[0014]
FIG. 4 shows a portion of the weighing mixer device 10 divided into a weighing tank 10A and a concrete mixer 10B for convenience of explanation. When the slurry is stored in the measuring tank 10A, the specific gravity is measured by the ultrasonic level meter 21 and the load cell 23, and water is added until a predetermined specific gravity is obtained to obtain a slurry with a substantially constant specific gravity. While putting in the concrete mixer 10B, a certain amount of cement is also mixed to produce mud mortar. When a slurry having a specific gravity is put into the concrete mixer 10B, the slurry is weighed and put in a certain amount.
[0015]
The sieve 2 is preferably one that can efficiently sort raw materials such as viscous and adherent excavated soil without involving moisture. For example, as shown in FIGS. 5 to 7, a cylindrical drum 30 is constituted by a plurality of rods 31 whose both ends are not fixed, the interval between adjacent rods 31 is approximately 40 mm, and the excavated soil has a diameter of Is selected to be less than 40 mm and 40 mm or more. Both ends of the rod 31 are attached (supported) to a rod fixture 32 having a hole having a diameter larger than the diameter of the rod 31, and the rod 31 is moved in one direction by rotating the drum 30 in one direction. Move and rotate with. When the raw material A is put into the drum 30 from the hopper 33 and the drum 30 is rotated, a lump with a diameter of less than 40 mm is discharged from the gap of the rod 31 (see FIG. 7), and a lump of 40 mm or more is discharged from the rear opening. It is discharged (see FIG. 6) and accommodated in the oversize receiving vessel 24. Further, the excavated soil in the drum 30 adheres to the rod 31, but the rod 31 itself moves and rotates in the rod fixture 32, so that what is attached to the rod 31 as shown in FIG. 7 is also removed. . What dropped from the gap between the rods 31 is conveyed to the belt conveyor 4 by the belt feeder 3. The belt conveyor 4 sprays the raw material A from the sprinkler to drop the mud of the raw material A (see FIG. 3). The raw material A after falling off is introduced into the pulverization / peptizer 5 together with water, and the raw material A processed by the pulverization / peptizer 5 and discharged from the outlet is a drum-shaped screen 18 having a diameter of 5 mm. The size is selected at this point, and those having a diameter of 5 mm or less are dropped into the agitator tank 6, and those having a diameter of 5 mm or more are sent to the oversize receiving vessel (see FIG. 3).
[0016]
The drum periphery of the conventional rotary sieve machine is mostly a net-like one or a combination of vertical and horizontal bars, and it does not move and rotate like this rod 31. It was difficult to select raw materials without using water. If this drum 30 is used, it can sort out efficiently, without using water.
[0017]
8 and 9 show an example of the crushing and peptizer 5, a plurality of scraping blades 51 are attached to the inner peripheral surface of the rotary drum 50, and a plurality of holding blades 53 are attached to the outer peripheral surface of the rotor 52, The rotating drum 50 and the rotor 52 are rotated in directions opposite to each other, and crushed and peptized in a region indicated by a symbol Z in FIG. FIG. 9 is a diagram showing a processing state of excavated soil (raw material A) having a diameter of less than 40 mm in the region Z, and the scraping blade 51 moves along the rotation direction of the rotary drum 50, so that the raw material A is moved upward. The scraping and holding blades 53 move along the rotational direction of the rotor 52 and thus act to pull down the raw material A. The raw material A held by the holding blades 53 collides with the raw material A which is picked up by the scraping blades 51, and a shearing force acts on this portion. Moreover, since the space | interval between both the blades 51 and 53 in the circumferential direction becomes the narrowest in the area | region Z, compressive force also acts with shear force, and the raw material A is crushed and grind | polished. A space in a region Z shown in FIG. 8 is a place where the scraping blade 51 and the holding blade 53 are closest to each other, and a strong compressive force acts on the raw material A at this place. As for the shearing force, the blades 51 and 53 function as the blade of the blade to remove the corners and deposits of the raw material A, and the raw materials A held between the blades and the blades are rubbed together. Deposits can be removed, and the effect of crushing and peptization will be utilized to the maximum extent. Further, since the rotor 52 is provided at the eccentric position of the rotary drum 50, the raw material A is repeatedly applied with a compressive force that varies depending on the location. That is, since the compressive force acting on the raw material A can be changed in a narrow space, the raw material A can be made into a slurry.
[0018]
FIG. 10 shows another example of the crushing and peptizing machine 5, and the shape of the scraping blades 51 attached to the rotary drum 50 is alternately formed with peak portions 51A and valley portions 51B. It was assumed that a small valley portion 51C was formed on the top surface of 51A. Further, the wall of the peak 51A on the rotation direction side of the valley 51B is formed to be steeply inclined. Furthermore, the wall on the opposite side of the peak 51A is formed with a gentle slope. Furthermore, a partition wall 51D having substantially the same height as the peak portion 51A is provided along the inner peripheral surface direction at a predetermined interval in the axial direction of the scraping blade.
[0019]
The holding blade 53 shown in FIGS. 10 and 11 includes a low peak portion 53A, and its top surface 53D is formed as a smooth surface, from the top surface of the front peak portion 53A to the trough portion 53B with respect to the rotation direction. A gentle wall 53E is formed, and a straight wall 53F is formed along a line that intersects the surface of the valley portion 53B substantially perpendicularly from the valley portion 53B toward the top surface 53D of the rear peak portion 53A. The valley portion 53B is partitioned by ribs 53G formed at a height up to the valley 53C in the axial direction.
[0020]
By using the above-described scraping blade 51, the raw material A can be scraped up to the optimum upper portion by the valley portion 51B, and the raw material A in the valley portion 51B can be smoothed by the gentle inclination of the wall opposite to the rotation direction. Can be renewed. Moreover, since the raw material A is not crushed and polished by the crest 51A, but the raw material A between the rotor 52 and the surface of the raw material A held by the valley 51B and the small valley 51C is crushed and polished. Wear on the top surface of the portion 51A is remarkably reduced, and it can withstand long-term use. In addition, by forming the valley portion 51C and the valley portion 51B, the pressure exerted on the raw material A is large at the small valley portion 51C and is small at the valley portion 51B. The raw material A can be sufficiently crushed and polished by changing the compressive force to a good slurry.
[0021]
The mortar bunker 8 and the pressure pump 9 described above assumes the integrated structure, the discharge side of the feed pump 9 and the branch pipe structure, the feed to the mortar strokes設場plant one as shipping discharge line L _1, and the other It returned as circulation line L ₂ to the mortar bunker 8 so as to circulate the mortar. By providing this circulation line L ₂ , it is possible to prevent the mud mortar from being lumped and deposited on the mortar bunker 8.
[0022]
【The invention's effect】
As described above, the present invention is slurry for agitator for storing fine fraction and coarse in grain fraction classifies excavated soil and crushing and deflocculating machine for crushing and peptizing, the fine fraction in a slurry state Excavation soil treatment equipment consisting of a tank, a storage tank for storing coarse particles, a measuring tank for making a slurry-like material with a substantially constant specific gravity by measuring the specific gravity of a slurry agitator tank, and a concrete mixer for producing mud mortar In order to classify the excavated soil into fine particles and coarse particles, a plurality of rods are arranged in a cylindrical shape at predetermined intervals to form a drum, and both ends of each rod are attached to the holes of the rod fixtures. The rod is moved and rotated in the hole of the rod fixture, the measuring tank and the concrete mixer are integrated, and the specific gravity of the slurry is measured with an ultrasonic level meter. 1.2 or higher A slurry of a certain specific gravity, since the predetermined cement against a certain amount of slurry of this a certain density to produce mud mortar and kneaded by a concrete mixer, is to produce a stable and high-quality mud mortar it can. In addition, space can be saved and high-quality mud mortar with a constant strength can be produced. Furthermore, a plurality of rods are arranged in a cylindrical shape with a predetermined interval to form a drum, and both ends of each rod are supported by holes in the rod fixture, and each rod moves within the hole in the rod fixture and rotates. Since the sieve machine configured to do so is provided in the first sorting step, it is possible to sort the excavated soil having viscosity and adhesion without using water.
[Brief description of the drawings]
FIG. 1 is a process diagram showing an outline of a processing method according to the present invention.
FIG. 2 is a diagram showing a portion of a weighing mixer device.
FIG. 3 is an explanatory diagram of the entire processing method.
FIG. 4 is a diagram illustrating the weighing mixer device separated in order of processing steps.
FIG. 5 is an overall view of a sieving machine.
FIG. 6 is a schematic sectional side view of a sieving machine.
FIG. 7 is a schematic front sectional view of a sieving machine.
FIG. 8 is a schematic front sectional view of a crushing and peptizer.
FIG. 9 is an enlarged detail view of a region Z of the crushing and peptizer.
FIG. 10 is a schematic front sectional view showing another example of a crushing and peptizing machine.
11 is a cross-sectional view of a holding blade of the crushing / peptizing machine shown in FIG.
FIG. 12 is an explanatory diagram of a conventional excavated soil treatment method.
FIG. 13 is a flowchart of a conventional excavated soil treatment method.
[Explanation of symbols]
2 Sieve machine 5 Crushing and peptizer 6 Slurry agitator tank 10 Measuring mixer apparatus 10A Measuring tank 10B Concrete mixer 11 Water tank 13 Cement silo 21 Ultrasonic level meter

Claims (1)

A pulverization / peptizer that classifies excavated soil into fine particles and coarse particles, and pulverizes and disintegrates, a slurry agitator tank that stores fine particles in a slurry state, a storage tank that stores coarse particles, In the excavating soil treatment apparatus consisting of a measuring tank that makes a slurry-like material with a substantially constant specific gravity by measuring the specific gravity of the agitator tank for slurry and adding water, and a concrete mixer that produces mud mortar,
A sieving machine that classifies excavated soil into fine and coarse particles. A plurality of rods are arranged in a cylindrical shape at predetermined intervals to form a drum, and both ends of each rod are supported by holes in the rod mounting tool. Each rod is configured to move and rotate within the hole in the rod fixture,
Integrating the measuring tank and the concrete mixer, measuring the specific gravity of the slurry-like thing with an ultrasonic level meter to make a slurry-like material having a specific gravity of 1.2 or more,
Excavated soil treatment device comprising a Turkey to produce mud mortar and kneaded by a concrete mixer a predetermined cement to a certain amount of slurry of this constant density.

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