JPH045312A - Method and device for reinforcing ground - Google Patents

Abstract

PURPOSE:To easily insert a reinforcing material into the ground by inserting the linear ground reinforcing material into a pipe, pressing the pipe to excavate a hole part in the ground by a blade part of the pipe, injecting a coagulant into, the hole part and then extracting the pipe from the hole part. CONSTITUTION:A hole part 2 is excavated in the ground 1 by a blade part 12 provided in an opening 9 of a pipe 7, and a reinforcing material 3a is inserted into the hole part 2 by pressing a point end part 5 of the ground reinforcing material 3a by the first hollow internal diametric part 8 of the pipe 7. Next, the excavated soil is discharged to the outside from a clearance 16 between the ground 1 and the pipe 7 by injecting water from a clearance 15 between the pipe 7 and the reinforcing material 3a. Then, the pipe 7 is drawn out from the hole part 2 with the reinforcing material 3a left as placed in the hole part 2 by injecting a coagulant into the hole part 2 from the clearance 15.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention provides a ground reinforcement method and a ground reinforcement device for reinforcing the ground by drilling a hole in the ground, inserting a reinforcing material such as a wire, and fixing it with a coagulant. Regarding.

[Prior Art] Conventionally, the ground reinforcement method involves drilling a hole in the ground, inserting a reinforcing material, and fixing it with a coagulant, as shown in Figures 4 (a) and (b).
), a long and narrow hole 2 is excavated in the ground 1 using an excavator (not shown), and a long and thin ground reinforcing material 3 made of steel rod, wire, ceramic, etc. is inserted into this hole 2, and the hole is opened. The ground 1 was reinforced by injecting a coagulating agent 4 made of mortar or the like into the part 2 to fix the ground 1 and the ground reinforcing material 3.

[Problem to be Solved by the Invention J] However, the above-mentioned conventional example has a problem in that when the elongated ground reinforcing material 3 made of wire or the like is flexible and long, it is difficult to insert it into the hole 2.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a ground reinforcing method and a ground reinforcing device that can be easily inserted into the ground even when the ground reinforcing material is flexible and long.

[Means for Solving the Problems 1] The method of the present invention involves inserting a linear ground reinforcement material into a vibrator,
By pressing the pipe with an external force and rotating it, a hole is excavated in the ground using the blade provided at the opening at the end of the pipe, and the ground reinforcing material is inserted together with the pipe into the hole in the ground. A ground reinforcement method characterized by inserting the pipe into the ground, injecting a coagulant into a hole in the ground, and pulling the pipe out of the hole using an external force while the ground reinforcing material is placed in the hole. be.

The device of the present invention has a ground reinforcing material having a tip having a larger outer diameter than a linear main body, and a blade in an opening at the end, and the ground reinforcing material is inserted and rotated by external force. A hole is excavated in the ground using the blade of the opening, the tip of the soil reinforcement material is pressed, and the pipe is inserted into the hole together with the soil reinforcement material and pulled out by the external force, and the pipe is pulled out by the external force. This is a ground reinforcing device characterized by comprising a coagulant that is injected into the ground and solidified to fix the ground and the ground reinforcing material to reinforce the ground.

[Function] According to the method and device of the present invention, a linear ground reinforcement material is inserted into a pipe, and the pipe is pressed by an external force and rotated, so that the reinforcement material provided in the opening at the end of the pipe is A hole is excavated in the ground with the blade, the ground reinforcement material is inserted into the hole in the ground together with the pipe, a coagulant is injected into the hole in the ground, and the ground reinforcement material is inserted into the hole. While still placed, the pipe is pulled out of the hole by the external force.

Therefore, even if the ground reinforcing material is flexible and long, it can be easily inserted into the ground, and the ground reinforcing material can be inserted at the same time as drilling holes.

[Examples] Hereinafter, the present invention will be described based on examples with reference to the drawings.

FIG. 1(a) is a sectional view of one embodiment of the present invention, FIG. 1(b)
) is a view taken along the line A-A in FIG. 1(a), FIG. 1(c) is a process illustration, and FIG. 1(d) is a view taken along the line B-B in FIG.
FIG. 2(a) is a sectional view, FIG. 2(b) is a front view, and FIG. 2(c) is a view taken along the line CC in FIG. 2(a).

The ground reinforcing material 3a is configured such that the tip portion 5 has a larger outer diameter than the linear main body portion 6.

The vibrator 7 has a first hollow inner diameter part 8 smaller than the outer diameter of the tip 5 of the ground reinforcing material 3a, a hollow part 10 communicating with the opening 9, and a hollow part 10 of the ground reinforcing material 3a in the hollow part 10. It has a second hollow inner diameter portion 11 larger than the outer diameter of the tip portion 5, and a blade portion 12 in the opening 9.

The ground reinforcement material 3a is made of steel rods, wires, ceramics, etc., but the material is not particularly limited.

Furthermore, the ground reinforcement is performed so that the first hollow inner diameter portion 8 of the vibrator 7 and the tip portion 5 of the ground reinforcing material 3a are almost in contact with each other, and the tip portion 5 of the ground reinforcing material 3a is housed in the hollow portion lO. material 3
a is inserted into the vibrator 7.

The tip portion 5 of the ground reinforcing material 3a is configured to have a larger outer diameter than the main body portion 6 at the peripheral portion 5a;
It may be configured to have a larger outer diameter than the main body portion 6 over the entire circumference.

As shown in FIG. 1(d), the opening 9 is connected to the ground reinforcement material 3.
The opening has a shape substantially similar to the cross section of the distal end 5 of a.

When the ground reinforcing material 3a is inserted into the vibrator 7 in the state shown in FIG. 1(d) and only the vibrator 7 is rotated by 45 degrees, the tip end will appear as shown in FIG. 1(b) and (c). 5 comes into contact with the periphery of the opening 9, thereby preventing the danger that the ground reinforcing material 3a and the vibrator 7 will come out during work.

An injection pipe (not shown) for injecting the coagulant 4 may be inserted between the vibrator 7 and the ground reinforcing material 3a, or the coagulant 4 may be injected from the gap 15.

The vibrator 7 is configured to be detachably divided in the longitudinal direction by a screw 13, but may be configured in one piece.

When the vibrator 7 is divided and constructed in this way, the ground reinforcing material 3a is divided into the vibrator 7 regardless of the length of the ground reinforcing material 3a.
can be easily inserted into the

The vibrator 7 is configured to be detachably divided by the bins 14 in the cross-sectional direction, but may be configured in one piece.

When the vibrator 7 is divided in this way, the ground reinforcing material 3a can be easily inserted into the vibrator 7.

Next, the vibrator 7 is pressed by an external force such as a hydraulic jack (not shown) and rotated, as shown in FIG. 3(a).
b) As shown in (c), a hole 2 is excavated in the ground 1 using the blade 12 provided in the opening 9 of the vibrator 7, and the tip 5 of the ground reinforcing material 3a is inserted into the first hole of the vibrator 7. The ground reinforcing material 3a is inserted into the hole 2 of the ground l by pressing with the hollow inner diameter part 8.

Here, water is injected through the gap 15 and the excavated soil on the ground 1 is discharged to the outside through the gap 16.

Next, the coagulant 4 is injected, and while the ground reinforcing material 3a is placed in the hole 2, the vibrator 7 is also pulled out from the hole 2 by an external force such as a hydraulic jack (not shown).

The coagulant 4 is injected into the hole 2 of the ground 1, and solidifies to fix the ground 1 and the ground reinforcing material 3a, thereby reinforcing the ground 1.

Mortar or the like is used as the coagulant 4, but its components are not particularly limited.

[Effect of the Invention J] As explained above, the present invention has the advantage that even when the ground reinforcing material is flexible and long, it can be easily inserted into the ground, and the ground reinforcing material can be inserted at the same time as drilling holes.

[Brief explanation of drawings]

FIG. 1(a) is a sectional view of one embodiment of the present invention, FIG. 1(b)
) is a view taken along the line A-A in FIG. 1(a), FIG. 1(c) is a process illustration, and FIG. 1(d) is a view taken along the line B-B in FIG.
Fig. 2(a) is a sectional view, Fig. 2(b) is a front view, Fig. 2(c) is a view taken along the line C-C in Fig. 2(a), and Fig. 3(a) (
b) and (c) are process explanatory diagrams, and FIGS. 4(a) and 4(b) are process explanatory diagrams of a conventional example. l... Ground 2... Hole 3a... Ground reinforcing material 4
...Coagulant 5...Tip part 6...Body part 7...
・Vibe 8...First hollow inner diameter part 9--Opening l
O...-Hollow part 11...Second hollow inner diameter part Applicant Mitsui Construction Co., Ltd.

Claims (1)

[Claims] 1. A linear ground reinforcement material is inserted into a pipe, and the pipe is pressed by an external force and rotated, so that the blade part provided in the opening at the end of the pipe touches the ground. Drilling a hole, inserting the ground reinforcing material together with the pipe into the hole in the ground, injecting a coagulant into the hole in the ground, and leaving the ground reinforcing material in the hole, A ground reinforcement method characterized in that the pipe is pulled out from the hole by the external force. 2. A ground reinforcing material having a tip with a larger outer diameter than the linear main body, and a blade in an opening at the end, and when the ground reinforcing material is inserted and pressed and rotated by an external force, the opening is closed. A hole is excavated in the ground with the blade part of the pipe, the tip of the ground reinforcing material is pressed, the pipe is inserted into the hole together with the ground reinforcing material, and the pipe is pulled out by the external force, and the pipe is injected into the hole. A ground reinforcing device comprising: a coagulating agent that solidifies the ground and the ground reinforcing material to reinforce the ground. 3. The ground reinforcing device according to claim 2, wherein the tip of the ground reinforcing material is configured to have a larger outer diameter than the main body over the entire circumference. 4. Claim 2, wherein the tip of the ground reinforcing material is configured to have a larger outer diameter at the peripheral edge than the main body.
The ground reinforcement device described. 5. The ground reinforcing device according to claim 2, wherein the opening has a shape substantially similar to the cross section of the tip of the ground reinforcing material. 6. The ground reinforcement device according to claim 2, wherein the pipe is provided with an injection pipe for injecting the coagulant into the hole. 7. Claim 2, wherein the pipe is divided in the longitudinal direction.
7. The ground reinforcement device according to any one of 6 to 6. 8. Claim 2, wherein the pipe is integrally constructed in the longitudinal direction.
7. The ground reinforcement device according to any one of 6 to 6. 9. The ground reinforcing device according to claim 2, wherein the pipe is divided in a cross-sectional direction. 10. The ground reinforcement device according to claim 2, wherein the pipe is integrally constructed in a cross-sectional direction.