KR20200025565A - simultaneous grouting packer - Google Patents

Abstract

The present invention is capable of simultaneous grouting in multiple stages on the surrounding ground by forming an expansion packer for the steel pipe installed inside the drilled hole to secure the stability of the tunnel or the underground space or the incision surface, and grouting by location according to the ground conditions if necessary. The purpose of the present invention is to provide a packer shovel steel pipe simultaneous grouting device which greatly increases the grouting effect and workability by varying the pressure of.

Description

Simultaneous grouting packer

The present invention relates to a grouting device and a construction method for suppressing ground subsidence due to excavation, and more specifically to an expansion packer device for forming a steel pipe installed inside a drilling hole to secure stability of a tunnel or underground space or incision surface. By providing a multi-stage simultaneous grouting to the surrounding ground and, if necessary, to provide a packer shovel steel pipe simultaneous grouting device that greatly increased the grouting effect and workability by varying the pressure of grouting according to the ground conditions.

The construction of tunnels and underground structures with large depths has been greatly increased due to the problem of traffic problems, urban aesthetics, and maximization of land utilization due to the increase of urban population. Construction conditions such as prevention of damage to the environment is getting worse, but due to the continuous occurrence of various safety accidents, safety construction is more important than ever in recent years.

On the other hand, the strength of the ground depends on geological conditions such as soil composition, size, gap ratio, water content, rock joint characteristics, weathering degree, etc. If there is a concern that damage to the adjacent buildings due to the loosening of the ground due to the excavation is located, it is common to proceed with the auxiliary construction method for the stability of the ground in parallel with the excavation method for the construction of the structure.

The most common of these auxiliary methods is the soil nailing method, and the soil nailing method is a reinforcement method utilizing shear resistance of nails and pull resistance of nails by integrating the ground by inserting nails into the ground and performing grouting. .

In general, the soil nailing method is applied by gravity grouting, the solidification time is long, and the grouting is performed about 3 to 6 times to compensate for the shrinkage phenomenon. In addition, the injection pressure can not be maintained, it is not easy to check the filling state and quality control.

In order to solve the above problems, a double packer steel pipe multi-stage grouting construction method of Patent No. 10-1045727 has been proposed.

The grouting apparatus provided with a double packer according to the prior art, the steel pipe 20 is formed with a plurality of grouting material injection hole through the side wall, and the shoe 30 is installed on the inner end of the steel pipe 20; Being installed on the outside of the steel pipe 20, one end is bound to the high-tight sealing opening 41, the other end is bound to the mobile sealing opening 42 to be slid to the outer surface of the steel pipe 20, A first packer 40 formed in a bag shape such that a grouting material may be filled therein; A steel rod 60 inserted into the steel pipe 20; A second packer 50 fixedly formed on an outer surface of the steel bar 60 and fitted into an inner side of the steel pipe 20; A first grouting material injection hose 70 formed on an outer surface of the steel pipe 20 to transport and grout the grouting material to the first packer 40; The second grouting material injection hose 80 is formed in the steel pipe 20 to inject a grouting material into the steel pipe 20.

The grouting device according to the prior art solves the problems caused by the use of a seal material requiring a long fixing time by forming a packer between a steel pipe (groove tube) and a hole without a sealing material, and forms a plurality of compartments in the hole. It is very useful in that sufficient grouting can be achieved by allowing grouting to be performed individually in each compartment.

However, the double packer grouting device according to the prior art as described above, the inner packer located inside the steel pipe and the packer located outside the steel pipe are only allowed to be inflated by independent expansion means, so that the construction is difficult and efficient. There is a difficulty.

In addition, the double packer grouting device is filled with urethane or silicon in the packer device formed on the outer surface of the steel pipe and expands, so that when the filled sealing material is fired, the packer device cannot be recovered and the cost thereof increases. .

Patent Registration No. 10-1045727

The present invention has been made in order to solve the above-mentioned conventional problems, it is configured to organically combine and disassemble the grout pipe and the steel pipe installed in the drilling hole, the packer located outside the steel pipe is quickly expanded or contracted It is an object of the present invention to provide a grouting device.

Packer shovel steel pipe simultaneous grouting apparatus according to the present invention for achieving the above object is configured to be expanded or contracted by the expansion packer to the steel pipe coupled to the grout pipe installed inside the drilling hole perforated with the outer surface of the steel pipe It is characterized in that the sealing and opening of the inner wall surface of the hole can be achieved quickly.

Still another object of the present invention is to configure the grout pipe and the steel pipe by the rotary clamp device to enable the disassembly coupling by the sleeve so that the grout pipe and the steel pipe can be disassembled and combined to allow the recovery of the packer device according to the disassembly coupling. It features.

The grouting device according to the present invention has an advantage that the grout pipe and the steel pipe can be organically combined and decomposed to facilitate transport and storage installation.

The present invention has the advantage that it is possible to recover the packer device by disassembling and combining the grout pipe and the steel pipe, thereby saving economic construction costs and easy construction management.

The present invention expands and contracts the packer by the rotary clamp device, so that construction can be performed at a faster time without having to wait for a firing time as in the prior art, thus reducing the air cost and thereby reducing construction costs.

1 is a cross-sectional view of a packer grouting device according to the present invention.
Figure 2 is a cross-sectional view of the expanded packer coupled to the steel pipe according to the invention.
3 is a cross-sectional view of a state in which the grouting pipe and the steel pipe is separated according to the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First of all, in adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are used as much as possible even though they are shown in different drawings.

In addition, in the following description of the present invention, if it is determined that a detailed description of related known functions and configurations may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

The following terms are terms set in consideration of functions in the present invention, which may vary depending on the intention or custom of the producer, and the definitions should be made based on the contents throughout the present specification.

1 is a cross-sectional view of the packer grouting apparatus according to the present invention, Figure 2 is a cross-sectional view of the expanded packer coupled to the steel pipe according to the present invention, Figure 3 is a cross-sectional view of the grouting pipe and the steel pipe is separated state according to the present invention. .

First, simultaneous packing of packer shovel steel pipe according to a first embodiment of the present invention will be described with reference to FIGS. 1 to 3.

1 to 3, the packer shovel steel pipe simultaneous grouting apparatus according to the first embodiment of the present invention is inserted into the grout pipe 100 and the grout pipe 100 is inserted into the perforated hole in the ground A plurality of grouting injection hoses and air hoses 200, a steel pipe 300 coupled to the end of the grout tube 100, an expansion unit 400 coupled to the outside of the steel pipe 300, and the The opposite side of the coupling portion of the grout pipe 100 and the steel pipe 300 is in close contact with the pipe (5) and the packer adhesion clap 10 is coupled to the end of the steel pipe clamp 20 for dismantling Lose.

The grout pipe 100 is inserted into the inside of the drilled hole. The shoe 40 is installed at the tip thereof to facilitate the injection of the grout pipe when the grout pipe is installed in the drilled hole. When the) acts as a resistor, it also acts as a pull resistor in part like the anchor head.

The expander 400 has at least one packer 2, a packering 4, and a pipe 50 sequentially coupled to the outside of the steel pipe, so that the packer contact clamp 100 or the steel pipe dismantling clamp 20 It is expanded or contracted by).

The shoe 40 is coupled to the front end by a rotational coupling is preferably formed in an oval or cone shape.

The grout pipe 100 inserted into the drilling hole and the steel pipe 300 coupled to the grout pipe process the external thread on the outer surfaces of the coupling ends 50 and 50a of the two pipes, and the grout pipe and the steel pipe on the inner inner wall surface. Correspondingly, the female threaded portion is configured to engage the sleeve 30 by rotatably coupling the two tubes.

The packer 2 and the packer ring 4, which are sequentially coupled to the outside of the steel pipe 300, are inserted into the outside of the steel pipe 300 and moved into the hole by the stopper 40 that is supported by the sleeve 30. This is suppressed and the packer 2 expands or contracts with the rotation of the packer contact clamp 10 so as to be in close contact with or open to the outer wall of the hole.

The packer contact clamp 10 installed on the outside of the steel pipe 300 and supported and rotated by the punching hole wall forms a male thread on the outer surface of the steel pipe and a female thread on the inner surface of the packer contact clamp 10. Packer 2 is to expand and contract as the packer contact clamp 10 rotates.

Packer 2 that expands and contracts along the outer wall of the steel pipe 300 according to the rotation of the packer contact clamp 10 is made of a urethane rubber having a strong mechanical strength and abrasion resistance and is fitted into a plurality of steel pipes in the middle of the packer. The load is prevented from being concentrated in the packer via the ring 4.

The steel pipe 300 is a part which is not completely inserted into the drilling hole is exposed to the outside of the blue hole, and the packer contact clamp 10 is installed on the exposed portion to pack the packer contact clamp (10) Will work while supporting.

The packer contact clamp 10 is a device that expands and contracts a plurality of packers 2, and the steel pipe dismantling clamp 20 is coupled to the end of the steel pipe apart from the packer contact clamp 10 at a predetermined interval.

Steel pipe disassembly clamp 20 is for dismantling the coupling end 50a coupled to the sleeve 30 is preferably made in a state completely fixed to the end of the steel pipe.

The steel pipe disassembly clamp 20 is for engaging and disengaging the sleeve 30 coupling end, and when it is turned clockwise, the coupling end 50 and 50a and the sleeve are coupled, and when the counterclockwise direction is turned, the sleeve is rotated or the steel pipe is turned. The sleeve or steel pipe is dismantled while rotating only.

Only the steel pipe may be dismantled or the sleeve may be dismantled together. In any case, the steel pipe combined with the packer is dismantled so that the packer may be reused.

2 is a view showing a state in which the packer is expanded and rotates the packer contact clamp 10 coupled to the steel pipe 300 exposed to the outside in the clockwise direction the packer is compressed and the center swells the inner wall surface Will be in close contact.

When the counterclockwise rotation releases the applied pressure and turns the steel pipe dismantling clamp 20, the steel pipe or sleeve coupled to the sleeve is dismantled.

Therefore, the Packer Schvelve steel pipe simultaneous grouting apparatus of the present invention can reuse the packer in a simple way can be useful for various uses.

As described so far, the present invention has been described with reference to the embodiments shown in the drawings, but this is merely illustrative, and those skilled in the art to which the art pertains have various modifications and equivalents therefrom. It will be appreciated that embodiments are possible.

Therefore, the true technical protection scope of the present invention will be defined by the claims.

2: packer 4: packering

Claims (5)

Grout pipe 100 is inserted into the perforated hole in the ground, a plurality of grouting injection hose and air hose 200 is inserted into the grout pipe 100 and the steel pipe coupled to the end of the grout pipe 100 300, the expansion unit 400 is coupled to the outside of the steel pipe 300, and the opposite side of the coupling portion of the grout pipe 100 and the steel pipe 300, the clapper 10 for sealing and the steel pipe Simultaneous grouting Packer Shovel steel pipe further comprising a dismantling clamp (20). According to claim 1, wherein the grout pipe 100 is inserted into the inside of the drill hole, the end of the shoe 40 is installed at the tip end by the rotary coupling to facilitate the grout when installing the grout pipe in the drill hole and the tunnel When the collapse or deformation of the excavation surface caused the steel pipe (300) acts as a resistor, the packer shovel steel pipe simultaneous grouting, characterized in that also serves as a part of the pull-out resistor like the anchor head. According to claim 1, wherein the expander 400 is at least one packer 2 and the packing ring 4 and the pipe 50 is sequentially coupled to the outside of the steel pipe packer contact clamp 100 or Packer shovel steel pipe simultaneous grouting, characterized in that the expansion or contraction by the steel pipe dismantling clamp (20). According to claim 1, wherein the grout pipe 100 is inserted into the drilling hole and the steel pipe 300 is coupled to the grout pipe is a male thread processing the outer surface of the coupling ends 50, 50a of the two pipes, the inside Packer shovel steel pipe simultaneous grouting, characterized in that configured to couple the two pipes by rotatably coupled to the inner threaded sleeve 30 to correspond to the grout pipe and the steel pipe. According to claim 3, The packer (2) and the packer ring (4) are sequentially coupled to the outside of the steel pipe 300 is fitted to the stopper 40 is supported on the sleeve 30 while being fitted to the outside of the steel pipe (300) It is configured to suppress movement to the inside of the drilling hole, and the packer contact clamp (10) installed on the outside of the steel pipe 300 and supported and rotated by the wall of the hole to form a male thread on the outer surface of the steel pipe and packer contact Packer shovel steel pipe simultaneous grinding, characterized in that the inner surface of the clamp (10) to form a female thread to expand and contract the packer (2) in accordance with the rotation of the packer contact clamp (10).

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