JPS5819808B2 - Chemical supply device for ground improvement - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a chemical solution supply device for soil improvement, and more particularly to a device for supplying a chemical solution to a chemical solution injection device that reaches a target ground by poling or driving the chemical solution.

It is an object of the present invention to provide an epoch-making device that allows a drug solution with a short gel time and a drug solution with a long gel time to be placed on standby when connected to an injection device, and can freely switch and supply a drug solution with a desired gel time.

An example of implementation of the present invention will be described in detail below based on the drawings.

The chemical solution supply side device A includes the first to third tanks 1a and 1b.

The first tank 1a contains a curing accelerating liquid C1, the second tank 1b contains a curing liquid C2 with a short gel time, and the third tank 1c contains a curing liquid with a long gel time. C3 respectively, and the first tank 1a is connected to the liquid sending pipe 8 of the first supply system path that connects to the liquid sending path 13 of the outer pipe 11 in the chemical liquid injection side device B. Three tanks 1
The liquid passage pipe 9 of the second supply system E, which is connected to the liquid passage 14 of the device B, is connected to c.

A valve 10, a liquid feeding pump 2, and a liquid feeding pressure monitor 4 are disposed in the middle of the liquid feeding pipe 8 on the -th supply system path.

A liquid feeding pump 3 and a liquid feeding pressure monitor 5 are provided in the middle of the liquid passage pipe 9 of the second supply line E, and both tanks 1b.

A switching point is provided at the branch with 1c, and a sub-supply path F is formed between the liquid feeding pressure monitor 5 side and the end of the intermediate pipe 9,
A switching cock 7 is disposed at a branch of the sub-supply path F on the side of the liquid feeding pressure monitor 5 so as to be integrally interlocked with the above-mentioned plug by means of a connecting means H.

Further, the liquid passage pipe 9 is provided with a measuring device 15 for measuring the supply amount of the hardening liquids C2 and C3.

The liquid feeding pressure monitors 4 and 5 check the pressure of the liquid supplied to the chemical liquid injection device B, and check the temporary liquid pressure when the injection body 12 in the chemical liquid injection device B, which will be described later, receives the liquid pressure and finishes feeding. Confirm operation by checking pressure drop and monitor injection pressure into ground G.

The switching valve 7 is formed by an automatic valve such as an electromagnetic cock, and both the switching valves γ receive an electric signal from a connecting means H such as a controller as an operating signal and switch simultaneously.

Furthermore, the gist of the present invention will not be changed even if the switching knobs 7 are linked so as to be interlocked by mechanical operations other than the above-mentioned electrical operations.

The sub supply path F is parallel to the liquid passage pipe 9 and forms another liquid passage independently.

As a result, the liquid passage pipe 9 and the sub-supply path F that run in parallel from the switching cock 1 to the injection device B are arranged such that one side is for the curing liquid C2 with a short gel time, and the other side is the curing liquid C3 with a long gel time.
A dedicated passageway was created.

Therefore, the chemical solution having the desired gel time can be freely switched and supplied by the switching unit 7.

Next, an example of the chemical liquid injection device B connected to the chemical liquid supply device A will be explained.The device B has an exterior body 11 that is excavated and sunk into the ground G by driving or poling machine 16 as shown in FIG. However, this exterior body 11 has an outer tube 11a.
and the inner pipe 11b, and a liquid feeding path 13 to which the liquid feeding pipe 8 is connected.
and a liquid passage 14 to which the liquid passage pipe 9 is connected are divided into two inner and outer sections, and an injection body 12 with a bottom and a through hole 17 opened in the side wall near the bottom is placed in the inner tube 11b under liquid pressure. A rear valve hole 18 and a front valve facing the through hole 17 are built into the outer tube 11a so as to be movable forward and backward, and communicate with both liquid passages 13 and 14 at the rear of the bottom surface at the front position of the injector 12. A hole 19 is provided, and after the exterior body 11 retreats, an annular hole is formed between the injector 12 and the injector 12 which receives the liquid pressure sent from the second supply path E and advances the L section into the ground hole G1. Through the guide space S, the chemical solution C supplied from the chemical solution supply device A is given directivity in all directions and is injected.

Further, the drug solution injection device may be of any type other than those shown in the drawings, such as a rondo injection type, a strainer injection type, a double front injection type, or a high pressure injection injection type.

Since the present invention is configured as described above, it is possible to freely switch and supply either a chemical solution with a short gel time or a chemical solution with a long gel time simply by operating the switching cock, and the chemical solution with a gel time suitable for the soil to be improved can be supplied. can be easily selected and supplied.

Since both the switching cocks are integrally linked, there is no timing difference between them when switching, and there is no accident that could lead to a supply failure.

Furthermore, the auxiliary supply path establishes an independent liquid passage separate from the liquid passage, forming a dedicated passage and tank for the curing liquid with short gel time and the curing liquid with long gel time, and connects it to the chemical liquid injection device. Because of this, the liquid remaining in the passage can be immediately supplied without any waste at each changeover, making it possible to replace the curing liquid remaining in the long connection hose of conventional equipment. We were able to eliminate the loss that was wasting the supply amount each time.

Further, the liquid feeding pressure monitor monitors the supply pressure of the chemical liquid, that is, the injection pressure into the ground, and can adjust the pump supply amount according to the geology.

Furthermore, the monitor confirms and reports the forward movement of the injector due to the chemical liquid by detecting the temporary change in fluid pressure. Accidents in which injections failed due to failure to do so have been resolved.

[Brief explanation of the drawing]

FIG. 1 is a front view of an embodiment of the present invention in which the drug supply device is combined with a drug injection device. FIG. 2 is an enlarged front view showing an embodiment of the chemical liquid injection device in cross section. In the figure, A is a chemical liquid supply side device, B is a chemical liquid injection side device, C is a chemical liquid, C1 is a hardening accelerating liquid, C2 is a hardening liquid with a short gel time, C3 is a hardening liquid with a long gel time, and D is a supply system. E is a second supply path, F is a sub-supply path, H is a connecting means,
1 is a chemical liquid tank, 1a is a first tank, 1b is a second tank, 1c is a third tank, 2 and 3 are liquid feeding pumps, 4 and 5 are liquid feeding pressure monitors, 6
, 7 is a switching cock.

Claims (1)

[Claims] 1. To the chemical injection system side, a first supply path that connects the first tank of the curing accelerating liquid, and a second supply path that connects the second tank of the curing liquid with a short gel time and the third tank of the curing liquid with a long gel time. A liquid feeding pump and a liquid feeding pressure monitor are installed in the first and second supply lines, respectively, and a switching cock is installed in the second supply line at the branch point to both tanks. On the other hand, a sub-supply path is formed between the liquid-feeding pressure monitor and the end of the same system path, and a switching cock is disposed in a branch on the side of the liquid-feeding pressure monitor of this sub-supply path in conjunction with the cock. Chemical liquid supply device.