JPS6334248B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a contact clay spraying apparatus and a spraying method in a field.

In general, dams are used for water intake, water storage, and water storage.
There are uses for soil and rock storage, etc., and by business, there are uses for water supply, irrigation, power generation, flood control, erosion control, slag stoppage, and multi-purpose use. Furthermore, by construction material, there are concrete dams (gravity dams, arch dams, buttress dams, hollow gravity dams), earth dams, rockfield dams, etc.

The rock fill dam (hereinafter referred to as fill dam) mentioned above is a dam built by piling up rock blocks, as shown in cross section in Figures 1 and 2, and the rock group S that makes up the dam body and the dam are watertight. It consists of four zones: an impermeable wall W, a filter F disposed between the impermeable wall W and the rock group S, and a transition T. Conventionally, when attaching contact clay (cohesive soil) to the bottom and foundation W′ of an impermeable wall W, which requires the most watertightness, clay raw materials with natural moisture content were temporarily placed in a contact clay adjustment yard prepared in advance. After the raw materials are mixed with water and kneaded with a bulldozer or tractor shovel, the mixed clay is transported to the base of the dam and pasted or thrown by hand, or mixed with a tamper, etc. He was doing compaction. Therefore, there was a problem in that it required a lot of effort and time, and complete water shielding could not be obtained due to the poor filling rate to the rock surface.

This invention was made in order to solve the above problems, and its purpose is to mechanically process the joint surface between the clay impermeable wall embankment and the bedrock, thereby making it possible to To provide a contact clay spraying device and a method for spraying contact clay in a field dam, which can perform spraying efficiently and with good filling without requiring time and effort, thereby improving accuracy. There is a particular thing.

Embodiments of the present invention will be described below with reference to the accompanying drawings.

As shown in FIGS. 3 to 7, the contact clay spraying apparatus according to the present invention can be roughly divided into a measuring device 1 for raw materials to be used as contact clay C, a conveying device 2 such as a conveyor, and a mixing water measuring device 3. , a mixing adjustment machine 4, an injection chute 5 for the spray machine, a spray machine tank body 6 communicating with the spray nozzle, a spray switching device 7 connected to the water supply pump, a spray hose 8 between the spray machine tank body 6 and the spray nozzle, and the above. hose 8
and a spray nozzle 9 connected to the spray nozzle 9.
First, to explain the measuring instrument 1, the above-mentioned measuring instrument 1 is placed at the ground level in front of the plant pedestal 10, and on the upper side thereof, a conveyor 1a for carrying in clay raw materials from the adjacent outside is installed in an inclined manner. has been done. Directly below the terminal end of the conveyor 1a, a hopper 1' is formed in the upper part to receive the clay raw material from the conveyor 1a, and at the lower end of this hopper is a mechanism 1'' for detecting the weighing of the clay raw material. A mechanism is installed at the upper end of the conveyor 1a to control the amount of clay raw material input in response to a signal from the weighing detector 1''. Further, from one of the lower ends of the measuring instrument 1 to the beginning end of the plant frame 10, a conveyor 2 such as a conveyor for feeding clay raw materials is installed in a diagonally ascending manner.

Next, at an upper position on one side of the plant mount 10, there is a mixing water meter 3 whose amount of water is controlled by the meter 1 described above, which allows water to be supplied via a spray pipe to the mixing regulator 4 located at an adjacent position. It is arranged like this. The mixing regulator 4, into which the spray pipe of the mixing water meter 3 is inserted, is formed into a container body 4' for kneading clay raw materials by supplying water at the upper part of the front half thereof, and at a position directly below it. Two screw blades 4'' of the same shape rotated by a motor 4a are housed in a diagonally downward manner in a parallel state.Furthermore, at the mid-lower end position of the mixing regulator 4, both screw blades 4'' are installed. Supply pipes 4b for carrying out the contact clay C mixed and adjusted by the blades 4'' to the side of the spray machine tank body 6 disposed directly below each side are connected in a hanging manner. In addition, two input chute 5 of the same shape for supplying contact clay C to the spray machine tank body 6 side installed at the lower position on the other side of the plant frame 10 are installed directly below each of the supply pipes 4b. It is set up like this.

Two spray machine tanks 6 of the same shape are installed in a vertical arrangement at the lower position on the other side of the plant mount 10, which is located directly below each of the above-mentioned input chute 5. Each chamber A ₁ of this spray machine tank body 6,
A hopper 6' with a valve is attached to the upper part of _A2 for receiving supply of contact clay C from the input chute 5. One end of the air supply pipe D, which communicates with an air supply device such as an external compressor (not shown), is connected to one side of the upper part of each of the chambers A ₁ and A ₂ described above. Also, each lower end of this air supply pipe D has a chamber on each side.
Two ring nozzles N of the same shape are installed parallel to each other in the horizontal direction so as to communicate with the bottoms of A ₁ and A ₂ . A screw feeder B is installed between each ring nozzle N and the bottom of the chambers A ₁ and A ₂ on each side.
It is rotatably stored by B'. Furthermore, blades R for stirring the contact clay C are rotatably housed at the bottom of each chamber A ₁ and A ₂ .

Next, a spray switching device 7 is arranged at the opening of each ring nozzle N, which communicates with the ring nozzle N on each side by operating a lever 7'. The distal end of the spray switching device 7 is connected to the base end of a spray hose 8 having a predetermined length.
In addition, at the base end position of this spray hose 8, an anti-occlusion device 11 is installed which communicates with an external water injection pump 12. Furthermore, a spray nozzle 9 for spraying the contact clay C onto the rock face 13 is fitted to the tip of the spray hose 8.

A contact clay spraying method according to the present invention will be explained using the spraying device having the above configuration.

First, before contact clay construction,
After installing the plant mount 10 including the measuring instrument 1 according to the arrangement shown in Figures and Figure 7 in a location outside the water-shielding wall of the dam body where it will not hinder spraying work, the particle size is adjusted in advance to a diameter of 20 mm or less. A clay raw material with a natural moisture content of Then, the above clay raw materials are conveyed to conveyor 1.
A, the raw materials are put into the measuring device 1 to be weighed, and the weighed fixed amount of raw materials is put into the mixing and adjusting machine 4 on the plant frame 10 using a conveyor 2 such as a conveyor.

While putting the above clay raw materials into the mixing and adjusting machine 4, the water to be mixed with the above raw materials is determined in advance through a preliminary test operation,
After measuring the amount of water in the mixing water measuring device 3, this mixed water is added to the clay raw material in the mixing adjustment device 4. In this case, since the mixing adjustment machine 4 serves as both a mixer and a transfer machine, the clay raw material and mixed water put into the mixer are kneaded by reverse rotation of the screw blades driven by the motor 4a.
Contact clay C is manufactured according to the required water content ratio.

The contact clay C produced in the mixing and adjusting machine 4 as described above is transferred to the upper terminal end with forward rotation by the screw blade 4'' of this adjusting machine 4, and then transferred from the position of the supply pipe 4b to the charging chute on each side. 5 into the chamber A ₁ or A ₂ of the spray machine tank body 6 located directly below it.

In this case, since the spray machine tank body 6 is capable of pumping the contact clay C inside, the contact clay C is thrown into the chamber A ₁ or A ₂ ,
While closing the valve G on each side and blowing low-pressure compressed air into the chamber A ₁ or A ₂ from the air supply pipe D, the blade R in the chamber A ₁ or A ₂ is
When the contact clay C is rotated, the internal contact clay C is stirred and transferred into the ring nozzle N by the screw feeder B on that side. At this time, since compressed air is continuously supplied from the air supply pipe D, the above-mentioned contact clay C is mixed with the compressed air in the ring nozzle N, and is passed through the spray switching device 7, the spray hose 8, and the spray nozzle 9. It can be sprayed onto the external rock face 13.
In this case, by positioning the spray nozzle 9 at an optimal angle with respect to the rock surface 13, the contact clay C can be sprayed at a good distance from the spray surface.

In order to perform the above-mentioned spraying construction continuously, two spraying machine tanks 6 are used as described above, so that while the spraying machine tank 6 on one side is pressurizing, the other side of the mixing adjustment machine 4 is The purpose can be achieved by mixing the clay raw material, adjusting it, and charging it into the chamber A ₂ of the other side spray machine tank body 6. In this case, if the spray switching device 7 is switched by operating the lever 7' immediately after the spraying and pressure feeding of one side is completed, the contact clay C on the other side can be continuously pumped. Since the base end of the spray hose 8 is provided with an anti-occlusion device 11 that communicates with the water injection pump 12, it is possible to reliably prevent the interior of the hose 8 from being clogged due to stagnation of the contact clay C within the hose 8.

As explained above, the present invention includes a measuring device 1 for clay raw materials, a conveying machine 2, and a mixing water measuring device 3 capable of controlling the amount of water added by the measuring device 1. A rotatable screw-type mixing adjustment machine 4 is arranged at the next process position, and a spraying machine tank is located directly below the mixing adjustment machine 4 to receive the contact clay C transferred from the mixing adjustment machine 4 through an input chute 5. By equipping the spray machine tank body 6 with a spray hose 8 equipped with a nozzle that pumps out the contact clay C with the aid of compressed air, the mixing and adjusting machine 4 can measure a fixed amount of clay raw materials. Contact Clay C of stable quality because it is mixed and mixed with added water.
can be manufactured. In addition, by rotating the screw blade 4'' of the adjusting device 4, the manufactured contact clay C can be transferred to the spraying machine tank body 6 side, so that multi-purpose operations of mixing, adjusting and conveying can be achieved with one device. This makes it possible to downsize the device.Furthermore, since it is possible to continuously mix contact clay C, coordination during work on the dam embankment is extremely improved, resulting in labor savings. The work can be carried out safely.Furthermore, since contact clay C is applied by spraying, it can be well filled into hollows and cracks on the rock surface 13, and it can also be contacted with the rock surface 13 using the hose 8. Because the clay C is pumped, spraying can be performed without using a vehicle such as a bulldozer or tractor shovel, so damage and contamination of the rock surface 13 are wiped out, and low-pressure compressed air is used during spraying. It can prevent the rock from peeling off and scattering.In addition, the spraying method has the effect of making the finished surface smooth and greatly improving the accuracy of construction.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional schematic diagram of a field dam to which the present invention is applied, Fig. 2 is a front view of the same dam, and Fig. 3 shows the arrangement of the spraying construction equipment of the present invention and the production and transportation of contact clay during spraying construction. 4 is a longitudinal cross-sectional view of the spray machine tank body taken along the line --- in FIG. 3; FIG. 5 is a cross-sectional view of the spray machine tank body taken along the -- line in FIG. 4; FIG. The figure is a plan view of the spraying apparatus according to the present invention, and FIG. 7 is a front view thereof. 1... Measuring device, 2... Conveying machine, 3... Mixing water measuring device, 4... Mixing adjustment machine, 5... Input chute,
6... Spray machine tank body, 8... Spray hose, 9... Spray nozzle, 13... Rock surface, C... Contact clay.

Claims (1)

[Claims] 1. A measuring device for clay raw materials, a conveying device, and a mixing water measuring device are provided, and a screw-type mixing adjustment machine is rotatably arranged at the next process position, and a screw type mixing adjustment machine is rotatably arranged at a position below the mixing adjustment machine. is equipped with a spraying machine tank body that receives the contact clay transferred from the conditioning machine via an input chute, and a spraying hose equipped with a nozzle that pressure-feeds the contact clay is connected to the spraying machine tank body. A contact clay spraying construction device for field dams, which is characterized by: 2. The clay raw materials measured in a certain amount using a measuring device are transported into a mixing adjustment machine, and in the adjustment machine, mixed water is added to the clay raw materials and mixed and adjusted by reverse rotation of screw blades to produce contact clay. The field dam is characterized in that the contact clay is thrown into the spraying machine tank by forward rotation of the screw blade, and the contact clay inside the spraying machine tank is pumped by low-pressure compressed air and sprayed onto the rock surface outside. Contact clay spraying method.