JPS6044423A - Transporting method of soil - Google Patents

Abstract

PURPOSE:To increase the fluidity of soil, decrease the resistance, and increase the transportation efficiency of soil by adding bubbles hard to break even if joined with silt or water to soil and mixing and stirring when soil is transported by a pressure transport device. CONSTITUTION:When a gallery 2 is drilled with a sealed drilling machine B, bubble generation and pressure feed device A is provided on the ground 1, and the bubble feed pipe 6 of this device A is inserted through the bulkhead 7 of the drilling machine B. Bubbles from the device A are mingled with drilled silt 13 via the feed pipe 6, bubbles and drilled silt 13 mixed and stirred by the rotation of the cutter of the sealed drilling machine B are fed to a pressure feed pump 10 via a soil discharge device 8 and a hopper 9, and further discharged soil is fed by pressure to an outside hopper 12 via a discharged-soil feed pipe 11. In this case, the said bubbles are produced by diluting an undiluted solution, made by adding a highly water-absorptive polymer to a surface active agent, with water and entering it into a bubble generator.

Description

[Detailed description of the invention] The present invention relates to a method for pumping excavated soil.

C is a method of conveying sand continuously in a narrow space without contaminating the surrounding area, and C is a conventional method of conveying sand using a medium inside a pipe. These media include compressed air, muddy water, etc., and are called pneumatic transport and muddy water transport, respectively. When compressed air is used, the soil needs to be smooth and sandy with a low water content, and when muddy water is used, it is necessary to avoid requiring a great deal of effort to separate the soil from the muddy water after transport. There was a problem with that.

Also, use a medium inside the tube! In order to send 1IfJ of -1- to the pipe, the excavated soil is sent J1 into the pipe using a pressure pump such as a pump, but in this case, the internal friction angle above is There was a problem in that friction caused by friction and adhesion force caused by the adhesiveness of the two materials occurred between the pipes, and this became a resistance force, making it impossible to move over a long distance. 11 soils continuously
In order to reduce the resistance force in the case of zero-feeding, there is also a proposed method in which anti-friction material is mixed with the soil, thoroughly stirred, and then the soil is pumped using a pressure pump.

Among these anti-friction materials, there is a type of anti-friction material that is made by adding water, ben1-puito (a physical substance containing υ), and other additives.

In this case, if the earth and sand is reduced by more than 30%, the friction reduction effect will improve, but the earth and sand will become muddy, and in this muddy situation, the soil will be l:) H. Because it is expensive and has a flashy appearance, it is difficult to dispose of it, and there is a problem in that secondary construction pollution is generated.

As a result of various investigations into these problems, the present invention found that when excavated soil is mixed with air bubbles that do not easily disappear when mixed with excavated soil or water, the air bubbles stay on top of the excavation and the soil particles become floating. As a result, the shear force of the mixed soil decreases, resulting in a significant friction-reducing effect, leading to the present invention.

For the experiment, the volume ratio of air bubbles and coarse sand was 1:0.
If you mix at a ratio of 2, it will be 85 before mixing and the slump will be 7.
It was found that coarse sand with a diameter of 1 cm has such fluidity that it becomes impossible to measure slump. In this way, the mixing of air bubbles significantly reduces the soil shedding/sheathing resistance.

In addition, if mixed soil containing air bubbles is transported to a soil dump and left unattended, the air bubbles will naturally disappear and the soil will return to the state of normal excavated soil, resulting in secondary construction pollution caused by construction waste. It has the advantage of not having to worry about

As mentioned above, the present invention is suitable for excavated soil and water.
By mixing the air bubbles that are difficult to absorb with Im l'lJ, it is possible to avoid long-distance pumping of excavated soil by improving the durability of the anti-friction effect11, and to expand the adaptability of excavated soil. It is something that

The content of the present invention will be specifically explained below.

For the strong bubbles that are difficult to eliminate in the excavated soil and water used in the present invention, it is appropriate that the stock solution is a surfactant with a super absorbent polymer added, or a protein-based foaming agent.
For example, in addition to Esko 1-L' (trade name), which is mainly composed of polyoxyJ dylene al-4-nylphenol needle, Sumikagel (trade name), which is mainly composed of a super absorbent polymer such as vinyl alcohol acrylic salt copolymer, is used. Alternatively, there are products with the addition of Aqua Keep (trade name) whose main component is sodium polyacrylate, and Esco 1 to K (trade names) whose main component is partially hydrolyzed protein.

The bubbles used in the present invention are those obtained by diluting the above-mentioned bubble 1 liquid with water and putting it into a foaming machine, and applying the dilution rate ALI and foaming rate 4B to ,!
Although not limited to 111, the dilution ratio is approximately 10 times, and 1
: It is practical to set the foaming ratio to about 20 times. The ratio of the air bubbles to the excavated soil varies depending on the type of excavated soil or water content, and is not particularly limited, but in general, a suitable C content is 5 to 30% in terms of C body m ratio to the excavated soil. In addition,
A5 in the present invention includes conventionally used minerals,
Organic glue, polymer compounds, oils, etc. may be added to the soil together with air bubbles.

Next, typical embodiments of the present invention will be explained with reference to the drawings.

In the figure, 1 is the ground, 2 is the tunnel in the ground 1, A is the bubble generating and pumping device, 3 is the bubble liquid storage container, 4 is the foaming pump for the bubble liquid, and 5 is the bubbles coming from the container 3. & If A foam liquid transport unit 6 is a foam feed pipe connected to the foaming 1 feed m4 for feeding the foam liquid to the 1M machine 4.

FIG. 1 shows an example of excavating the tunnel 2 using the shield excavator B, and 7 shows the bulkhead of the shield excavator 1-1.
8 is a screw conveyor type soil removal device, 9 is this IJI
10 is a pressure pump connected to this hopper 9, 11 is a υ1 soil delivery pipe connected to this pressure cylinder/10, and 12 is an outdoor hopper C installed on the ground 1. .

In this example, the bubble generation and pressure feeding device A is installed on the ground 1 (
, the bubble feed pipe 6 is inserted into the bulkhead 7 of the shield excavation machine B, and the bubbles are mixed into the excavated soil 13, and the bubbles and the excavated soil are mixed by rotation of a cutter (not shown) in the face. The stirred soil is fed to a pressure pump 10 via an earth removal device 8 and a hopper 9, and the soil is pumped to an outside hopper 12 via an earth removal pipe 11.

Note that the outside hopper 12 may be replaced by a dump truck (not shown) for easily disposing of earth and sand.

Fig. 2 also shows that the excavated soil 13 discharged from the 1'J1 soil device 68 of shield excavation Ill B is conveyed from bell 1 to conveyor 1.
4, the excavated soil 13 is fed to the pressure pump 10 via a popper 16 having an agitator 15. In this case, a bubble generating pressure feeding device 8 is installed in the tunnel 2, and a bubble feed pipe 6 is installed. is connected to the popper 16.

Therefore, bubbles inside the hopper 16? [The excavated soil 13 is mixed by a stirrer 15 and sent out to the outside of the mine via a pressure pump 10 and a soil delivery pipe 11 with an increased flow rate of 1!1. ff17 is a tamp truck for disposing of earth and sand that transports this IJl.
.

Further, FIGS. 3 and 4 show an example in which the method of the present invention is applied to (Nnerue J), where 18 is a face, 19 is an excavated earth and sand, and 20 is an excavated earth and sand loading machine.

In the case of FIG. 3, the stirring 1 and 1 connected to the pressure pump 10
The excavated earth and sand 19 is fed into the popper 16 to the right of 5 by the excavated earth and sand loading machine 20, and the air bubble feed pipe 6 of the air bubble generation feeder "flA" installed in the tunnel 2 is transferred to the hopper 16.
The excavated soil 19 and air bubbles are mixed and stirred in the hopper 16 by the agitator 15, and then the pressure pump 1
0 into the discharge pipe 11, and the bubble supply pipe 6 is also connected in the middle of the discharge pipe 11 to improve the fluidity of the discharged soil. Reference numeral 12 is a hopper installed outside the mine to receive the LC discharged soil, but instead of this hopper 12, a rack can be used for the dump truck 1, and C may also be used, as described above.

In addition, FIG. 4 shows that a switch 21 is installed in a hopper 16 having an agitator 15, and the bubble feed pipe 6 of the bubble generating and pressure feeding device Δ installed in the mine is connected to the hopper 16, and the discharged soil is sent to the bottom of the hopper 16. The pipe 11 is directly connected, an on-off valve 22 is inserted into the discharge pipe 11, and a -1 exhauster 23 is installed in the mine, and its compressed air supply boss 24 is installed.
is connected to the upper part of the hopper 16.

In this case, first, the excavated earth and sand 19 is fed into the hopper 16 by the excavated earth and sand loading machine 2o while the switch 21 is turned on, and then the lid 21 is temporarily closed and the air bubbles are transferred to the hopper through the air bubble feed pipe 6. At the same time, the agitator 15 is rotated and the excavated earth and sand are combined with the excavated earth and sand. There are 11 people at the top of -C
1 By opening the on-off valve 22 while increasing the pressure inside the sealed hopper 16, the waste soil mixed with air bubbles in the hopper 16 is discharged through the waste discharge pipe 11 to the hopper 12 installed outside the C pit. .

According to experiments, a pressure-feeding device using the above-mentioned closed-type popper and compressor has been shown to be effective! River, Zuhumpu Ocm
Coarse sand is heated at an air pressure of 2 kg/cl (pu τ, diameter 2
I tried to force feed it within 5+1111 hours, but ha;y
, 4. L It was impossible, but if you mix 1:0.15 potted plants with this coarse sand, the result will be 5011.
It is now possible to perform pressure feeding.

Since the present invention is as described above, if J is applied to this construction method,
By adding non-disappearing air bubbles to the excavated soil and mixing and stirring (11'), the fluidity of the soil can be increased and the resistance force can be reduced. As a result, excavated soil can be continuously pumped over a long distance, which is an excellent effect.

In addition, if you dial 911 at the soil disposal site, the air bubbles in the tilled soil will naturally disappear and the soil will return to the state of normal excavated soil. This has the advantage of eliminating secondary construction pollution caused by disposal43.

[Brief explanation of the drawing]

FIGS. 1 to 4 are cross-sectional views for explaining cases in which the method of the present invention is applied to various construction methods. 1... Ground 2... Mine shaft A... Bubble generation pressure feeding device 3... Bubbly liquid storage container 4... Foaming pressure feeding machine 5...
Bubbly liquid transport pipe 6... Bubbles feed pipe B... Shield excavator 7... Partition wall 8... 411 material 9... Hopper 10... Pressure pump 11... Excavated soil delivery tube 1
2... External hopper 13... Excavation earth and sand 14...
Belt conveyor 15...Agitation 1tψ16...Hopper 17...Dump truck for earth and sand disposal C 18...Face 19...Excavation top sand 20...Excavation earth and sand loading machine 21...Opening/closing hole・22
...Opening/closing valve 23...] Nburets 1 no 24...
Compressed air supply hose special IT applicant NEI Aoki Kenro Co., Ltd.

Claims (1)

[Claims] 1. When transporting soil with a pressure-feeding device, carbon that is mixed with soil and water disappears (by adding air bubbles to the soil and stirring it, the fluidity of the soil is increased and the resistance force is reduced. A method of transporting soil characterized by sagging.