KR970010505B1 - Method and apparatus for injecting ground hardening agent - Google Patents

Abstract

None.

Description

Excavation solidifying solution injection method and device

1 is an overall explanatory view showing an embodiment of the apparatus for injecting a flexural solids of the present invention.

2 is an exploded explanatory diagram of FIG.

3 is an enlarged cross-sectional view of the periphery of the rotating body of FIG.

4 is a cross-sectional view taken along line A-A of FIG.

5 is a longitudinal sectional view of a conventional pneumatic impact drilling drill.

* Explanation of symbols for main parts of the drawings

1: Excavation Drill 2: Cell Gas

2a: cylindrical body 2b: conduit

3: guide tube 4: rotating body

11: Button Bit 12: Casing

15: air inlet hole 34: air hole

35: solidifying solution hole 43: supply passage

44: outlet

[Industrial use]

The present invention relates to a method of injecting a solid-coated solid solution for embedding a ready-made pile into a hole excavated in the ground, and the device, and in detail, after the excavation with a high-pressure hammer type drilling drill by the operation of compressed air, the excavation The present invention relates to an excavator solidifying solution injecting method and a device in which solidifying liquid can be continuously injected without taking out a drill.

It is used in fields such as foundation piles, which install ready-made piles in low noise and low vibration on grounds with rocks or rocks.

[Prior art]

BACKGROUND ART Conventionally, ready-made piles that have been hit by hitting have been changed by a method of digging a hole approximately equal to the volume of the pile and installing it in order to install with low noise and low vibration. Since this method disturbs the ground around the pile or the ground of the pile tip, the bearing capacity of the pile is weakened, and the solidifying solution (cement milk, etc.) is injected for the purpose of improving the pile.

Here, a pneumatic impact type drilling drill that exerts power even for rock excavation by using the impact movement by compressed air operation (JP-A 55-25265, J-57-35356, J-58) 5354, etc.) and are called by names such as down-hole hammers and superdrills (Publication No. 63-52197).

For example, in the excavation drill of the down-hole hammer, compressed air is sent to the air inlet 15 by an air compressor (not shown), and the reciprocating motion of the piston 16 is called a button bit (commonly referred to as a head). (11) and drills the hole with the force of the button bit.

[Problems that the invention tries to solve]

By the way, the above-mentioned excavation drill is excellent in excavation such as a rock bed, but when excavating and forming a vertical hole in the ground and submerging the ready-made concrete pile, etc., and using it as a device for construction of the foundation pile, the entire excavation drill is used. There was a drawback that it was too expensive to be able to inject the solidifying liquid once it had been taken out of the ground.

Rapidly raising the excavation drill in order to improve this causes a collapse of the hole wall, causing the pile to be fixed high.

On the other hand, if the air inlet hole 15 through which compressed air flows is replaced with the method of shortening the solidifying solution from the air, and attempting to shorten the air, the solidifying solution is accumulated inside the drilling drill having a complicated mechanism. It was causing the problem of loss of function.

The present invention is to overcome the above problems, and after excavating the ground with an excavation drill, the excavation solidification solution injection method for reducing the air by placing the solidified liquid at the bottom of the excavation hole at the same time when pulling out the device, and its It is an object to provide a device.

[Means for solving the problem]

Excavator solidifying solution injection method of the first invention is equipped with a cell body having a conduit disposed on the outer peripheral wall of the cylindrical body to cover the casing of the pneumatic impact drilling drill, and has a supply passage in the upper position of the cell body Also, the feed passage and the air inlet hole are communicated with each other in advance by using an excavated coagulation solution injection device having a rotating body which communicates the outlet of the supply path with the air inlet hole of the excavation drill or the conduit by rotation switching. Compressed air to the supply path, excavated to the predetermined depth of the ground with a button bit of the excavation drill while rotating the excavator solidified liquid injection device in a predetermined direction, and then, the supply of compressed air is stopped, Switching to connect the supply passage with the conduit, then supplying the solidifying solution to the supply passage while rotating the excavator solids injection device in the opposite direction to the excavator Pull out, and injects a solidifying solution into the tip of the excavation hole.

Excavator solidifying liquid injection device of the second invention is excreted in the pneumatic impact type drilling drill (1) by the operation of compressed air and the cylindrical body (2a) installed to cover the casing of the drilling drill and the outer peripheral wall of the cylindrical body A guide tube (3) having a cell body (2) having a conduit (2b) to be formed, and an air hole contacting the air inlet hole of the excavation drill at a position above the cell body, and a muscle solidifying solution hole contacting the conduit (3) ) And a rotating body (4) mounted on the inside of the guide tube and rotating left and right with the supply passage so that the outlet of the supply passage can be joined to the air hole or the muscle solid solution hole, When the rotating body is in one rotary restraint position, the supply passage communicates with the air inlet hole of the excavation drill through the air hole, and when the rotary body is in another rotation restraint position, the supply passage is connected to the conduit through the root coagulation solution.By, after the excavation of the soil prior to the rotating turn it is characterized in that the conduit is configured to inject the fluid through the near-bonding.

Here, the "left and right rotation" means rotating within a certain angle without power movement, and means that the angle range is irrelevant. The "rotating body which can be changed and joined" means the rotating body which functions as a switching valve which can move an outlet and join to either an air hole or a root-coating liquid hole.

The "supply path" is a flow path through which compressed air is fed during excavation, and refers to a flow path connected with the ground pipe to which the muscle freezing solution is supplied when the excavated solidifying solution injection device of the present invention is pulled up after the completion of the excavation. The pipe may be formed even if it is formed by an excavation hole or the like.

[Action]

According to the excavator solidifying solution injection method and the apparatus of the present invention, in the step of excavating the ground, the compressed air is introduced into the supply path by communicating the outlet of the supply path with the air inlet hole directed toward the inside of the excavation drill main body. By the reciprocating motion, the rock layer can be excavated by the striking force of the button bit. After cutting the ground, when the excavation drill is pulled up, the outlet of the supply passage is to communicate with the conduit. Therefore, by injecting cement milk or the like into the supply passage, the excavation drill is slowly pulled up, and the bearing force expression material is applied to the tip of the pile. Infusion solution can be injected.

EXAMPLE

Hereinafter, the present invention will be described in detail by way of examples.

(1) Construction of Excavator Solid Solution Injection Device

1 to 4 show an embodiment of the apparatus for injecting a flexor solidified solution of the present invention, which includes an excavation drill 1, a cell body 2, a guide cylinder 3, a rotating body 4, and a pin. (5) and the platen (6).

The excavation drill 1 is a conventional excavation drill using compressed air, and sends the compressed air from an air compressor (not shown) to reciprocate the piston directly above the button bit 11 to convert this striking energy into the button bit. It transmits to (11) and drills a hole with the force of the button bit. The internal mechanism is the same as shown in FIG.

Reference numeral 12 denotes a casing, numeral 13 denotes a back head having a hexagonal shape, and reference numeral 14 denotes a nozzle having an air inlet hole 15. The pin groove 141 is cut out in the nozzle 14.

The cell body 2 consists of a cylindrical body 2a and a conduit 2b.

The cylindrical body 2a is the disk 22 fixed to the upper surface of the hollow-cylinder cylinder 21, and has the hexagonal opening 221 in the center of the disk 22. As shown in FIG.

The top of the excavation drill 1 is covered with the excavation drill and attached to the back head 13 and the nozzle 14 from the opening 221. The height of the cylindrical body 2a is approximately equal to the height of the casing 12 so that the entire casing 12 of the excavation drill is covered.

The inner diameter of the cylindrical body 2a is slightly larger than the outer diameter of the casing 12 for easy attachment.

The spacer 23 is partially fixed to the inner wall surface of the cylindrical body 2a.

This is because the cell body 2 maintains stability even during the operation of the excavation drill 1.

The conduit 2b consists of a pipe, and is wound up while being wound around the cylindrical body 2a in a spiral form from the upper end 24 of the outer circumferential wall of the cylindrical body 2a to be disposed up to the lower end 25 near the button bit 11. have. The installation of the conduit 2b in a spiral manner prevents the conduit 2b from collapsing the inner wall surface of the excavation hole.

In addition, the conduit 2b is intended to prevent the conduit 2b from being peeled off from the excavated solidifying solution injector due to the earth resistance during excavation. It is also intended to smoothly return the apparatus for injecting the cabbage root during the drilling process by the excavation drill (1).

The hexagonal back head 13 is fitted into the opening 221 of the cell body 2 so that when the excavation drill 1 rotates in a predetermined direction, the cell body 2 also rotates together. .

The guide cylinder 3 is substantially cylindrical in shape, and the outer diameter is approximately equal to the outer diameter of the cylindrical body 2a so that the rotor 4 can be placed thereon. The part 31 is formed.

The guide cylinder 3 is arranged on the disk 22 of the cell body 2.

As shown in Figs. 3 and 4, the portion 31 forms a substantially cylindrical depression, and the arcuate locking piece 37 is formed. It is fixed to a part of the inner peripheral wall of the part 31.

The bottom part 32 of the part 31 has an attachment hole 33 into which the top of the back head 13 of the excavation drill 1 and the nozzle 14 are fitted. The lower part of the attachment hole 33 is formed with the recessed part 39 of a hexagonal shape, and the upper part of the back head 13 is fitted here.

It is for interlocking the guide cylinder 3 to the rotation of the excavation drill. Like the second An air hole 34 communicating with the air inlet hole 15 of the nozzle 14 is formed in the bottom surface deviating from the center of the part 31. The air hole 34 communicates with the attachment hole 33. When the back head 13 and the nozzle 14 are set in the attachment hole 33, the air hole 34 is connected to the air inlet hole 15. It is designed to communicate in a confidential state.

Reference numeral 331 denotes a locking groove.

In the bottom surface of the part 31, the coagulation solution hole 35 is formed equidistant from the center of the bottom surface in a point symmetry with the air hole 34. The root-coating solution hole 35 passes through a passage hole 36 facing the side wall of the guide tube 3, and is connected to a short tube 38 provided on the outer circumferential wall of the guide tube 3. It is the structure connected with the conduit 2b located in the upper end part 24 of the cylindrical body 2a.

Reference numeral 5 denotes a pin, and when the cell body 2 and the guide tube 3 are attached to the excavation drill 1, a pin hole is formed by the pin groove 141 and the locking groove 331, and the pin is located here. When (5) is inserted, the excavation drill 1, the cell body 2, and the guide cylinder 3 are integrated to prevent peeling.

And the guide cylinder 3 can be divided into upper part and lower part, and upper part is the same as FIG. 3, FIG.

The rotating body 4 of the guide cylinder 3 It is a cylinder-shaped body which has the notch part 41 which mounted on the part 31, and cut | disconnected a part of the bottom part to arc shape at the angle of about 270 degree.

The side 42 of the circumferential portion 42 which is not cut off The circumferential edge of the part 31 is slid, and the cutout part 41 slid the inner circumferential wall of the locking piece 37 to the side so that the rotating body 4 can rotate left and right within an angle of approximately 180 degrees. It is.

The cutout height of the cutout part 41 is slightly higher than the height of the catching piece 37 (FIG. 3).

The rotary body 4 is provided with a supply path 43 penetrating from the top surface to the bottom surface. In the upper surface, when the rotary body 4 is placed inside the guide tube 3, the supply path 43 is located at the center, and in the outlet 44 of the lower surface, the rotary body 4 rotates to the right and the engaging piece 37 When it arrives at the position which is restrained by), it is joined to the air hole 34 (FIG. 3), and when it turns to the position stopped by the latching piece 37 by turning left, it is joined to the root-coating liquid hole 35.

Reference numeral 45 denotes a seal ring, and 46 denotes an elastic member.

When the outlet 44 of the supply passage 43 is joined to the air hole 34 or the muscle solid solution hole 35, the seal ring 45 is pressed by the elastic member 46 to seal.

Reference numeral 47 denotes a leakproof sealing plate.

The platen 6 is a hollow park plate. The platen 6 is placed inside the guide tube 3, and the platen 6 is brought into contact with the upper surface of the rotor 4 so that the platen 3 can be brought into contact with the guide plate 3. It is fixed to).

It is for eliminating sliding of the rotating body 4 in an up-down direction.

Using the above components, the excavator solidifying liquid injection device is assembled as follows.

Attach the cell body 2 from the top of the excavation drill 1. The cell body places the guide cylinder 3 on the disc 22. Then, the pin 5 is inserted into the pin hole formed by the locking groove 331 and the pin groove 141. Thereafter, the end pipe 38 and the conduit 2b are connected.

Subsequently, the rotor 4 is placed inside the guide cylinder 3, and the platen 6 is finally fixed to the guide cylinder 3 to complete the excavated coagulation fluid injector.

(2) Excavator solidifying solution injection method

Excavator solidifying liquid injector assembled as above is installed vertically in the landfill of pile. Then, confirming that the outlet 44 of the rotating body 4 is in communication with the air inlet hole 15 of the excavation drill, sending compressed air to the air compressor, leading the ground while turning the excavator solidifying liquid injection device to the right. Excavate.

Here, during the excavation, the outlet 44 is maintained in a state in which the air hole 34 is joined, and the compressed air is supplied to the supply path 43. The excavation works under these conditions. Under such conditions, the rotating body 4 is also pressed in the right rotational direction, whereby the external force acting by the rotating body 4 to press the locking piece 37 to match the outlet 44 to the air hole 34.

The button bit 11 for excavation penetrates a rock or the like with its breaking force, and smoothly excavates. Thus, when the pile reaches the predetermined length beyond the bottom of the pile hole, the supply of compressed air is stopped to complete the excavation work. Subsequently, when the rotating body 4 is rotated to the left and rotated, the rotating body 4 is restrained by the locking piece 37 to secure a state where the outlet 44 is joined to the conduit 3.

Then, the rotating body 4 is restrained at a position opposite to the contacting position of the engaging piece 37 at the time of excavation, the excavator solidifying liquid injection device is pulled out while making a left turn in the opposite direction to the time of excavation, At this time, an external force that constantly matches the outlet 44 and the root solidifying solution hole 35 is applied to the rotating body 4.

Thereafter, the excavator solidifying liquid injector is pulled to the ground while turning left, proceeds simultaneously with this operation, flows cement milk into the supply path 43, and releases the cement milk from the uppermost end 26 of the conduit 2b. Let's do it. Thus, when the excavator solids injection device is pulled to the ground, the desired cement milk is securely filled in the bottom of the excavation hole.

Finally, the ready-made pile is submerged in this excavation hole in which cement milk is injected, and it is completed.

(3) Effect of Example

Excavator solidifying solution injection method and the apparatus of the present embodiment was used in the landfill pile construction, conventionally, the work that required two steps that had to be removed once the excavation drill and then injecting cement milk is sufficient in one step , A significant shortening of the air could be achieved. In particular, it showed the power in the place which inserts a ready-made pile deeply.

In this embodiment, since the drilling drill made of ready-made material is used as it is, and the conduit 2b or the like is not directly attached to the casing 12 by welding or the like, the life of the drilling drill is shortened due to the occurrence of cracks or the like. Neither do they interfere with the operation of the piston 16 by causing a dimensional error. In particular, according to the present embodiment, which uses a cemented carbide material in the casing 12 of the excavation drill for digging a hard rock layer, it does not change the material by welding or the like.

In addition, when the excavation drill is used for a long time, the wear of the casing 12 is remarkable, but since the cell body 2 surrounding the casing 12 protects the casing, damage to the expensive excavation drill 1 is reduced.

In addition, since the cell body 2 covers the excavation drill 1, the soundproof effect is excellent and noise is reduced. Since the conduit 2b is not directly fixed to the casing 12, there is freedom and the desired hole can be excavated by changing the button bit 11 and the cell body 2 in accordance with the required hole diameter.

In addition, in this invention, it is not limited to what was illustrated in the said specific Example, According to the objective and a use, it can be set as the Example changed variously within the scope of the present invention.

For example, a reinforcing member may be attached to the conduit 2b in order to avoid earth pressure resistance to the conduit 2b. In addition, when the earth pressure resistance is low, an annular body may be formed inside the guide cylinder 3, and a straight pipe which is connected directly to and vertically lowered may be used for the conduit 2b.

In addition, the guide cylinder 3 may be integrated with the cell body 2 without taking a separate configuration as in the present embodiment.

[Effects of the Invention]

As described above, the excavated coagulation solution injection method and the apparatus of the present invention release the coagulation solution into the excavation hole while pulling up the excavated main body machine, so it is a one-step operation to achieve an excellent effect in reducing the air. .

Claims (2)

A cell body having a conduit disposed on the outer circumferential wall of the cylindrical body is covered so that the casing of the pneumatic impact drilling drill can be covered. The cell body has a supply path at an upper position of the cell body, and an outlet of the supply path is provided with air of the excavation drill. Using an excavated solidifying solution injector having a rotating body in communication with the inlet hole or the conduit by rotation switching, the supply path and the air inlet hole are communicated with each other to supply compressed air to the supply path. Rotate the excavator solidifying solution injection device in a predetermined direction to excavate to the predetermined depth of the ground with the button bit of the excavation drill, and then stop supplying the compressed air, and switch to communicate the conduit with the supply path of the rotating body, and then While supplying the solidifying solution to the feed passage, the apparatus for extracting the extinguisher solidifying solution is rotated in the opposite direction to the excavator, and the solidifying solution is removed at the tip of the digging hole. Excavator solidifying liquid injection method characterized in that the injection. A cell body (2) comprising a pneumatic impact drilling drill (1) by compressed air operation, a cylindrical body (2a) provided to cover the casing of the drilling drill, and a conduit (2b) disposed on an outer circumferential wall of the cylindrical body (2). ), A guide tube (3) having an air hole contacting the air inlet hole of the excavation drill at the upper end of the cell body, and a solidifying fluid hole contacting the conduit, and placed inside the guide cylinder. And a rotating body (4) which rotates left and right with the supply arc so that the outlet of the supply arc can be joined to the air hole or the root solid solution hole, and the rotating body is located at one rotation restraint position. While the supply path communicates with the air inlet hole of the excavation drill through the air hole, when the rotary rotational position is reached, the supply path communicates with the conduit through the coagulation solution, and after the previous excavation of the ground, Excavator solidifying liquid injection device configured to change the whole to inject the solidifying liquid past the conduit.