JPH10131168A - Method and device for solidifying ground - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a ground solidifying method and device wherein solidification by injection of a solidifying agent for a wide region can be performed eve in a narrow space even if a small-scaled device is used and solidification by injection of a chemical for an arbitrary direction can be performed. SOLUTION: With regard to the ground solidifying method and device, a double tube member 1 in which an edge member 2 having an excavation cutter 26 and a water jetting outlet 27 on the edge part is attached to the edge is rotated by a motor 4. Water is fed from a first rotation joint 38a to the outside flow passage of the double tube member 1, drilling is performed by advancing the motor 4 while water is jetted from the water jetting outlet 27, after drilling a solidifying agent is carried from the outside and inside flow passages of the double tube 1 to change over the flow passage of the edge member 2, the solidifying agent is jetted from the peripheral part of the edge member 2, the double tube member 1 is retreated and the soil of the circumference of a hole is solidified.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for solidifying a ground for strengthening the ground and stopping water.

[0002]

2. Description of the Related Art In order to strengthen soft ground, stop spring water, and the like, a consolidation agent is injected to consolidate the ground. As the consolidation agent, a two-liquid system composed of a main agent such as water glass and a consolidation aid such as an alkali agent is used. These two liquids are mixed and injected into the ground to form a ground. Consolidation takes place.

[0003] In the conventional method of consolidating the ground, a double pipe member is made to penetrate into the ground by a rotating device suspended so as to be able to move in the vertical direction, and is fixed from a tip member provided at the tip of the double pipe. There is one that mixes a drug and injects it into the ground.

[0004]

However, in this method, the size of the apparatus becomes large, it is difficult to work in a narrow space, and the double pipe member cannot enter the direction other than the vertical direction. There is a problem.

[0005] An object of the present invention is to solve the above-mentioned problems by using a small-sized apparatus, allowing a consolidating agent to be injected into a wide area even in a narrow space, and furthermore, a drug in an arbitrary direction. To obtain a ground consolidation method and apparatus capable of injecting soil.

[0006]

SUMMARY OF THE INVENTION The present invention relates to the following method and apparatus for solidifying soil. (1) A tip member having an excavating blade and a water jet at the tip rotates a double pipe member attached to the tip, supplies water from one flow path of the double pipe member, and jets water from the water jet port. A step of advancing and perforating while making the hole, and after the perforation, the consolidation agent is sent from another flow path of the double pipe member to switch the flow path of the tip member, and the consolidation medicine is ejected from the periphery of the tip member. And retracting the double pipe member to consolidate the soil around the hole. (2) A double pipe member that can be joined at an end, a drilling blade and a water jet at a tip, a drug jet at a peripheral portion, and a water jet and a drug jet by sending water or a chemical solution. A switching device for switching the double pipe member, a tip device attached to the tip of the double pipe member, a rotation device for rotating the double pipe member, a forward retreat device for moving the rotation device forward or backward, and a double pipe. A connecting pipe section connected between the base of the member and the rotating device, a first rotary joint for supplying water or a drug to an outer flow path of the connecting pipe section, and a drug or water for supplying an inner flow path of a double pipe section And a liquid supply member having a second rotary joint.

[0007] The ground consolidation in the present invention is suitable for consolidating by injecting a consolidation agent from a space or structure provided in the ground to the surrounding ground, but in other cases, the ground consolidation is suitable. It is also applicable to the conclusion. The consolidation agent used in the present invention is a two-pack type agent, and generally comprises a consolidation main agent and a consolidation auxiliary agent, for example, water glass or the like as the consolidation main agent.
Alkaline agent (eg sodium bicarbonate) as a consolidation aid
And the like, but is not limited thereto.

As the double tube member used in the present invention, a member in which an inner tube is provided at an interval in an outer tube having an outer diameter of 19 to 60 mm, preferably 29 to 50 mm is preferable. When a corrosive agent (for example, an alkaline agent) is used as the consolidation agent, it is preferable that one or both of the outer tube and the inner tube be made of stainless steel. This double pipe member can be joined at the end, for example, by forming a male screw at one end and a female screw at the other end, two or more double pipe members can be joined, and the outer pipe and the inner pipe adjacent to each other by joining. Are connected to each other.

The tip member can be joined to the tip of the double-pipe member, and has a drilling blade and a water jet at its tip, and a chemical jet at its periphery. A switching device for switching the flow path of the medicine ejection port is provided. As a switching device, for example, a valve that closes the flow path of the inner tube and the medicine ejection port is provided, and when water is sent from the outer tube, water is ejected from the water ejection port at the distal end portion, and when the medicine is sent from the inner tube, The medicine ejection port is opened by pressing the valve, the water ejection port is closed, and the medicines in the inner tube and the outer tube are mixed and ejected to the periphery from the medicine ejection port. A cutting material such as diamond titanite is used as the cutting blade.

[0010] The liquid supply member is connected to the base of the double pipe member, and the first rotary joint is provided in the outer flow path of the connection pipe section rotated by the rotating device, and the second rotary joint is provided in the inner flow path. Each is connected in a rotatable state,
Each channel is connected so that water or a drug can be supplied.

As the rotating device, for example, a motor can be used, and the rotating device is connected so as to transmit the rotating force of the rotating shaft to the double pipe member via the double pipe portion of the liquid supply member. It is preferable that the forward / backward moving device is for moving forward or backward in a linear direction along a guide member such as a rail. The forward and backward movement may be performed by mechanical force or manually.

[0012]

In the method of solidifying the ground by the above-mentioned apparatus, the connection pipe of the liquid supply member is attached to the rotating device, and the double pipe member having the tip member attached thereto is connected to the connection pipe of the liquid supply member and rotated. ,
When the rotating device is advanced by the forward and backward device while the one flow path for sending the chemical solution is closed, the water is sent from the other flow path and jetted from the water outlet at the tip, the tip member and the double pipe member are provided. Moves forward with the rotation of the cutting blade, and pierces.

In the forward position of the rotating device, the liquid supply member and the double tube member are separated to retreat the rotation device, another double tube member is connected between the previous double tube member and the liquid supply member, and rotated again. The device is advanced to perform perforation and this is repeated.

When the water supply is stopped when the tip member reaches the target position, and the consolidating agent is supplied from the outer channel and the inner channel, the switching device closes the water jet and opens the drug jet. Is switched as follows. Thus, the medicines in the inner and outer flow paths are mixed and injected into the soil from the medicine ejection port.

After the liquid supply is continued for a time required for the injection of the chemical, the liquid is supplied while the rotating device is retracted, and the chemical is sequentially injected into the soil at the near side. When the rotating device is retracted, the liquid supply is stopped, the double pipe member is separated from the liquid supply member, and the retracted double pipe member is removed. The rotating device is moved forward to connect the remaining double pipe member and the liquid supply member, and the rotating device is retracted while supplying and injecting the drug again, and further, the drug is injected into the soil at the near side.

By repeating the above operation, the medicine can be injected into the entire area of the perforated portion. The injected medicine solidifies after a certain period of time has elapsed after mixing, and the ground is reinforced, water is stopped, and the like. The hole after removing the double pipe member is filled with cement or the like as necessary.

Since the above operation is performed by moving the rotating device forward and backward, the rotating device can be operated in a small space with a small device, and by changing the direction of the forward and backward movement, it is possible to pierce and inject in any direction.

[0018]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a front view showing a cross section of a part of the soil compaction device of the embodiment, FIG. 2 is a cross-sectional view of a double pipe member,
3A and 3B are cross-sectional views of the tip member in different states, and FIG. 4 is a cross-sectional view of the liquid supply member.

In FIG. 1, reference numeral 1 denotes a double tube member, a tip member 2 is attached to the tip, and a base side is attached to a motor 4 as a rotating device via a liquid supply member 3. The motor 4 travels on a rail 6 provided on a gantry 5 and moves forward and backward. The gantry 5 is provided with fixing pins 8 on a base 7.
Is to be fixed by.

As shown in FIG. 2, the double pipe member 1 has a steel outer pipe 11 and a stainless steel inner pipe 12 spaced from each other by a spacer 13, and is provided outside the inner pipe outside the inner pipe. An inner flow path 15 is formed inside the flow path 14. Outer tube 1
The male screw 16 is formed at one end of the female screw 1 and the female screw 1 is formed at the other end.
7, a V-shaped recess 18 is formed at one end of the inner tube 12, and a V-shaped projection 19 is formed at the other end. Thereby, by connecting the plurality of double pipe members 1 at the ends in the longitudinal direction, the respective flow paths 14 and 15 can be connected.

As shown in FIG. 3, the distal end member 2 has a stainless steel inner tube 22 arranged on one side half of a steel outer tube 21 with a spacer 23 provided therebetween, and an outer passage 24.
And an inner channel 25 are formed. A female screw 17 is formed in the outer tube 21 on the base side, and a V-shaped convex portion 19 is formed in the inner tube 22 so that the inner tube 22 can be joined to the double tube member 1. A digging blade 26 and a water jet 27 are provided on the tip side of the tip member 2, and a drug jet 28 is provided on the periphery.

The distal end member 2 is provided with a switching device 50 for opening and closing the medicine ejection port 28 and the opening 29 of the inner tube 22. In the switching device 50, a valve 51 for opening and closing the medicine ejection port 28 and a valve 52 for opening and closing the opening 29 are supported by springs 53 and 54, respectively. 55 is a support member.

As shown in FIG. 4, the liquid supply member 3 has a double-tube portion 30a at one end on the distal end side of the connection tube portion 30, and an outer tube 31 made of stainless steel and an inner tube 32 made of stainless steel.
Are arranged at a distance from each other by a partition wall 33 to form an outer flow path 34 and an inner flow path 35. A male screw 16 is formed in the outer pipe 31 on the distal end side, and a V-shaped recess 18 is formed in the inner pipe 32. Thus, it can be connected to the base side of the double pipe member 1.

One half of the connection pipe 30 at the base side is a single pipe 3
0b, a liquid supply chamber 36 is provided in which the outer pipe 31 extends and communicates with the internal flow path 35. A female screw 17 is formed at the distal end on the base side of the outer tube 31, and is attached to the rotating shaft 46 of the motor 4. The double tube portion 30a of the connection tube portion 30 and the outer tube 31 of the single tube portion 30b respectively have a liquid supply port 37a,
37b, and these liquid supply ports 37a, 37
The first and second water-sealable rotary joints 38a and 38b are provided so as to cover b.

The first and second rotary joints 38a,
38b is a circular jacket 56a having connection ports 39a, 39b corresponding to the liquid supply ports 37a, 37b, respectively.
56b is provided so as to surround the outer tube 31, and is rotatably and water-sealed to the outer tube 31 by bearings 57a, 57b and O-rings 58a, 58b. A cock 59 is provided on each of the jackets 56a and 56b.
The liquid supply pipes 60a and 60b communicate with each other via the a and 59b.

The motor 4 has a rotating shaft 46 projecting from the speed reducer 41. In the motor 4, a slide table 62 having a pinion 61 that engages with the rack 9 provided on the rail 6 is slidable on the rail 6, and the pinion 61 is a handle 63.
, The motor 4 is configured to rotate forward and backward. A guide post 64 is provided in front of the gantry 5.
Are provided, and a guide rod 65 that allows the passage of the double pipe member 1 is formed.

In the method of solidifying the ground by the above-described apparatus, the connection pipe 30 of the liquid supply member 3 is attached to the rotating shaft 46 of the motor 4,
Further, the double pipe member 1 having the distal end member 2 attached to the distal end is connected to the connection pipe portion 30 of the liquid supply member 3. In this state, the motor 4 is rotated to connect the connecting pipe 30, the double pipe 1 and the tip 2
To rotate. The switching device 50 of the tip member 2 is shown in FIG.
As shown in FIG.
Reference numeral 52 denotes a state in which the medicine ejection port 28 and the opening 29 are closed.

In this state, the cock 59a is opened and the liquid supply pipe 6 is opened.
When water is supplied from the water outlet 0a, the water enters the outer flow path 34 from the connection port 39a through the liquid supply port 37a, and further passes through the outer flow paths 14, 24 of the double pipe member 1 and the tip member 2, and from the water ejection port 27. Gushing. Since the excavation blade 26 is rotated by the rotation of the tip member 2 to scrape off the soil at the tip, the pinion 61 is rotated by operating the handle 63 and the slide table 6 is rotated.
2 runs on the rail 6 and the motor 4 moves forward. Thereby, the double pipe member 1 and the tip member 2 advance, and the perforation is performed.

At the forward position of the motor 4, the liquid supply member 3 and the double pipe member 1 are separated to move the motor 4 backward, and another double pipe member 1 is placed between the front double pipe member 1 and the liquid supply member 3. And the motor 4 is advanced again to perform perforation, and this is repeated.

When the distal end member 2 reaches the target position, the water supply is stopped, a consolidation agent (for example, water glass) is supplied from the liquid supply pipe 60a, and a consolidation aid (for example, liquid glass) is supplied from the liquid supply pipe 60b. When sodium bicarbonate) is supplied and the cocks 59a, 59b are opened, the respective chemicals flow through the outer flow paths 34, 14, 24 or the inner flow paths 35, 15, 25, respectively. The medicine flowing from the inner flow path 25 opens the valve 52, overlaps the valve 51, closes the water ejection port 27, and further pushes the valve 51 to open the medicine ejection port 28. As a result, the medicines in the flow paths 24 and 25 are mixed and injected into the soil from the medicine ejection port 28.

After the liquid is supplied for a time necessary for the injection of the chemical, the liquid is supplied while the motor 4 is retracted, and the chemical is sequentially injected into the soil at the near side. When the motor 4 retreats, the liquid supply is stopped, and the double pipe member 1 and the liquid supply member 3 are stopped.
And remove the retracted first-most double tube member 1.
Then, the motor 4 is moved forward to connect the remaining double pipe member 1 and the liquid supply member 3, and the motor 4 is retracted while supplying and injecting the medicine again, and further injects the medicine into the soil at the near side. I do.

By repeating the above operation, the medicine can be injected into the entire area of the perforated portion. The injected medicine solidifies after a certain period of time has elapsed after mixing, and the ground is reinforced, water is stopped, and the like. The hole after extracting the state-of-the-art double pipe member 1 and the tip member 2 is filled with cement or the like as necessary.

Since the above operation is performed by moving the motor 4 forward and backward, it can be operated in a small space with a small device, and by changing the direction of forward movement and backward movement, it is possible to pierce in any direction and inject medicine. Become.

In the above example, the forward and backward movement of the motor 4 has been described as an example by manual operation. However, it is also possible to mechanically advance and retract the motor 4 using a hydraulic mechanism, a screw mechanism or the like.

[0035]

According to the present invention, the double pipe member to which the tip member is attached is advanced and retracted while being rotated by the rotating device, so that the supply of water or the chemical solution can be switched by the liquid supply device to be injected into the soil. Thus, using a small-sized device, it is possible to consolidate a small area by injecting a consolidating agent into a wide area even in a narrow space, and it is also possible to consolidate by injecting a chemical in any direction.

[Brief description of the drawings]

FIG. 1 is a front view showing a cross section of a part of a ground consolidation device according to an embodiment.

FIG. 2 is a sectional view of a double pipe member.

FIGS. 3A and 3B are cross-sectional views of the distal end member in different states.

FIG. 4 is a sectional view of a liquid supply member.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 double pipe member 2 tip member 3 liquid supply member 4 motor 5 gantry 6 rail 7 base 8 fixing pin 11, 21, 31 outer pipe 12, 22, 32 inner pipe 13, 23 spacer 14, 24, 34 outer flow path 15 , 25, 35 Inner flow path 16 Male screw 17 Female screw 18 V-shaped concave portion 19 V-shaped convex portion 26 Drilling blade 27 Water jet port 28 Chemical jet port 29 Opening section 30 Connection pipe section 30a Double pipe section 30b Single pipe section 36 Liquid supply Chambers 37a, 37b Liquid supply port 38a First rotary joint 38b Second rotary joint 39a, 39b Connection port 41 Reducer 46 Rotary shaft 50 Switching device 51, 52 Valve 53, 54 Spring 55 Support member 56a, 56b Jacket 57a, 57b Bearing 58a, 58b O-ring 59a, 59b Cock 60a, 60b Liquid supply pipe 61 Pinion 62 Sliding Table 63 handle

Claims (2)

[Claims] A tip member having an excavating blade and a water jet at a tip portion rotates a double pipe member attached to the tip and supplies water from one flow path of the double pipe member. Advancing and piercing while ejecting, and after piercing, sending the consolidation agent from another flow path of the double pipe member and switching the flow path of the tip member, and consolidating the consolidation agent from the peripheral portion of the tip member. Ejecting and retracting the double pipe member to consolidate the soil around the hole. 2. A double pipe member which can be joined at an end, a drilling blade and a water jet at a tip end, and a drug jet at a peripheral portion, and a water jet or a drug jetted by sending water or a chemical solution. A tip member attached to the tip of the double-pipe member, having a switching device for switching the spout, a rotating device for rotating the double-pipe member, a forward and backward device for advancing or retracting the rotating device; A connecting pipe section connected between the base of the heavy pipe member and the rotating device, a first rotary joint for supplying water or a drug to an outer flow path of the connecting pipe section, and a drug or water in an inner flow path of the double pipe section; And a liquid supply member having a second rotary joint for supplying the liquid.