JPS602450B2 - Chemical injection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for injecting a chemical into the ground.

An inner tube is placed inside an outer tube that has a cutting blade at its tip, and a valve body that closes the tip of the inner tube and a valve body that moves up and down in the valve chamber between the inner tube and the outer tube are installed below it. However, when the latter valve body is in the raised position, it connects the upper hole bored in the sleeve of the inner and outer tubes, and in the lowered position, it connects the lower hole bored in the wall of the inner and outer tubes with the outside. A liquid medicine injector designed to pass through a lotus is disclosed in Tokuiso Akikoichi 62 filed by this applicant.
It has already been proposed as seen in No. 822 (Special Seki No. 55-155815).

By the way, with this device, the square body placed inside the inner tube is not attached when drilling a hole, but is attached to the inner tube only when the chemical solution is injected, so there is a risk that the operator may forget to put it on when injecting the chemical solution. However, there was a drawback that the intended purpose could not be achieved.

SUMMARY OF THE INVENTION Therefore, the object of the present invention is to provide a chemical liquid injection device which eliminates the drawbacks of the previously proposed devices as described above, and which has a simple structure and is easy to operate.

The present invention will be established below with reference to embodiments shown in the drawings.

In FIGS. 1 and 2, an injection device 1 is shown.
is a double pipe consisting of inner and outer pipes 2 and 3, and a cutting blade 4 is provided at the tip of the outer pipe 3, and a gap 6 between the inner and outer pipes 2 and 3 is formed above the cutting blade. It is closed by an annular wall 5 provided at the tip of the tube 2. A cylindrical valve 8 that slides on the annular wall 5 and the inner surface near the tip of the inner tube 2 is disposed inside the inner tube 2, and the valve 8 has a flange portion at its lower end that engages with the lower surface of the annular wall 5. 9 is formed, and this flange portion 9
An extension spring 11 is inserted between the bottom surface of the outer tube 2 and the upper surface of the catch seat 10 provided on the inner wall of the tip of the outer tube 2.
Therefore, the valve 8 is always given an upward tendency.

The valve 8 is raised at the position where the flange portion 9 engages with the lower surface of the annular wall 5, and the valve 8 has a horizontal hole 12 and a vertical hole 1.
A T-shaped hole consisting of 3 is bored, and the vertical hole 13 opens into the cavity 7 at the tip of the outer tube 2. A valve 8 is provided in the annular wall 5.
A lower transverse hole 14 is drilled in the annular wall 5 of the inner tube 2, which is closed by this valve 8 when the valve 8 is raised, and an upper part that fits into the transverse hole 12 provided in the valve when the valve 8 is raised. Hole 1
5 is drilled.

Further, the outer tube 3 is provided with a hole 16 which is in continuous communication with the lower hole 14 of the annular wall 5. A required material source is supplied into the inner tube 2 and the gap 6 between the outer and outer tubes 2 and 3 of the injection device 1 as shown in FIG. 3.

In the figure, 17 is a curing agent tank, which is connected to the inner pipe 2 by a pipe 18.
A pump 19 and a valve 20 are installed in this piping 18. Reference numeral 21 denotes a long gelling material tank connected to the outer pipe 3 by a pipe 22, a pump 23 and valves 24 and 25 installed before and after the pump 22, respectively, and a boring water tank 26 connected to the valve 25. 27.

Operations such as drilling a hole 29 in the ground 28 and injecting a chemical solution are performed using the above-mentioned device, and these operations will be explained below.

1. Hole excavation work (Figures 1 and 4) Boring water is supplied from the water tank 26 by the pump 23 to the gap 6 of the injection device 1, and while the device 1 is rotated, excavation is performed in the ground 28 in the same manner as a normal excavation method. I do.

At this time, the water supplied to the gap 6 flows through the upper hole 15 of the inner pipe 2.
, through the horizontal hole 12 and vertical hole 13 of the valve 8, flows into the gap 7 at the tip of the outer tube 3, and then is discharged into the hole 29, thus forming a drilled hole 29 of a predetermined depth.

2. Injection of instant-setting gelling material (Figures 2 and 5) When the drilling of the borehole 29 is completed as described above, the water supply to the gap 6 is stopped, and the curing agent is injected into the inner pipe 2 by the pump 19. and a long-form gelling material are simultaneously supplied to the gap 6 by the pump 23.

As a result, water pressure acts on the valve 8 from above, so that the valve 8 descends against the upward force of the spring 11, as shown in FIG. However, the lower hole 14 fits inside the inner tube 2. This lower hole 1
4, the long-twilled gelling material that has flowed into the inner tube 2 from the gap 6 through the upper hole 15 of the inner tube 2 and the hardening agent in the inner tube 2 are mixed above the valve 8 and instantaneously. The instant gelling material thus formed is poured into the port hole 29 through the lower hole 14 and the hole 16 in the outer tube, and is cut as shown in the fifth figure. A packer 30 is formed in the hole 29. 3. Injecting the long twill gelling material (Figs. 1 and 6) Once the packer 30 is formed as described above, the supply of the curing agent into the inner tube 2 is stopped, and the long twill gelling material is injected into the gap 6. Only the supply of recycled materials will continue.

As a result, the valve 8 is returned to its initial position by the upward force of the spring 11, and the lower hole 14 of the annular wall 5 is closed in the same manner as when the boring water is supplied as shown in FIG. Therefore, the long twill gelling material supplied into the gap 6 passes through the upper hole 15 of the inner tube 2, the horizontal hole 12 and the vertical hole 13 of the valve 8, and then flows into the gap 7 at the tip of the outer tube 2. As shown in FIG. 6, it is poured into the drilled hole 29 below the packer 30, and is injected into the hole to form the most striped gelling material layer 31. In this way, hole 29
A gelling material layer 31 that is impermeable and for ground reinforcement is provided at the bottom of the
is formed, but if necessary, the device 1 is pulled up by the required size and a gelling material layer 31' is formed above it, as shown in FIG. 7. This can be repeated as many times as required.

The above is just one example, and it goes without saying that it can be modified at will as long as it has the same function as long as it does not depart from the scope of the claims, and there are already many applicable gelling materials. are provided, so you can select the appropriate one. Since this invention is as described above, boring water is supplied to the gap between the inner and outer tubes, water is injected from the tip of the device to the outside while drilling is performed, and once a hole of a desired depth has been drilled, the device remains installed in the hole. At the same time, the supply of boring water is stopped, and the flash stripe-type gelling material is supplied through the inner tube and the above-mentioned gap to form wisteria stripes through the hole provided in the outer tube into the hole at a predetermined distance above the bottom of the hole. Pour out the mold gelling material to form a packer in the area, and once this formation is complete, supply the long gelling material into the gap in the same way as when supplying boring water, and then pour the gelling material into the gap from the tip of the device. A long-shaped gelling material is poured out below the packer, and in this way, the backer prevents the long-shaped gelling material from spilling out of the hole, and the gelling material penetrates into the hole wall at the bottom of the packer. Let me inject it,
It is possible to reliably strengthen the ground and reduce water infiltration, and the only work required for this purpose is the selection of the supply liquid, with no other operations required. In addition to being able to inject a chemical solution, it has a simple structure and has excellent effects such as easy maintenance.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional front view of an embodiment of the present invention, showing the state during excavation and injection of long-head type gelling material, and FIG. FIG. 3 is a diagram showing the material supply system of the same as above, and FIGS. 4 to 7 are schematic diagrams showing the order of the construction method according to the present invention. 1... Chemical injection device, 2... Inner tube, 3...
...Outer tube, 4...Drilling blade, 5...Annular wall, 6...Gap, 7...Void, 8...
Valve, 11...Spring, 12...Horizontal hole, 13.
... Vertical hole, 14 ... Lower hole, 15 ... Upper hole, 16 ... Hole, 17 ... Curing agent tank, 19, 23 ...・Pump, 21... Long gelling material tank, 26... Boring water, 28...
...Ground, 29...Drilling, 30,30'...
... Packer, 31, 31' ... Gelling material layer. Figure 2 Figure 3 Atsushi Figure 5 Figure 6 Figure 7

Claims (1)

[Claims] 1. An inner tube is placed at a predetermined gap within an outer tube equipped with a digging blade at its tip, and an annular wall is provided at the tip of the inner tube to close the gap, and the annular wall and the inner surface near the tip of the inner tube are A valve that slides and always has an upward tendency is arranged, a horizontal hole is provided in the annular wall, a hole is provided in the inner tube above the hole, and a hole is provided in the outer tube that is always connected to the hole in the annular wall. a communicating hole is provided, and the valve is provided with a hole that communicates the gap with the tip of the outer tube through the hole in the inner tube in its raised position, and further such that the valve closes the hole in the annular wall in this position. A liquid drug injection device characterized by: