KR20210000728U - simultaneous grouting packer - Google Patents

Abstract

The present design allows simultaneous grouting of steel pipes installed in tunnels, underground spaces, or incisions in multiple stages by forming an expansion packer device to secure the stability of the perforated hole and, if necessary, grouting for each location according to the ground conditions. It is to provide a simultaneous grouting device for Packer Shoebel steel pipes, which greatly increases the grouting effect and workability by varying the pressure of.

Description

Simultaneous grouting packer

The present invention is a grouting device and a construction method for suppressing ground subsidence due to excavation, and in more detail, an expansion packer device is formed for a steel pipe installed inside a perforated hole to secure the stability of a tunnel or an underground space or a cut surface. This is to provide a simultaneous grouting device for Packer Sewell steel pipes, which enables simultaneous grouting in multiple stages on the surrounding ground and, if necessary, greatly increases the grouting effect and workability by varying the grouting pressure for each location according to the ground condition.

The construction of tunnels and deep underground structures has been greatly increased for reasons such as solving the problem of traffic difficulties due to the increase in urban population, improving the city aesthetics, and maximizing the land use rate. While construction conditions, such as preventing damage to, are getting worse and worse, in recent years, due to the continuous occurrence of various safety accidents, safety construction has been demanded as the top priority.

On the other hand, the strength of the ground varies depending on the conditions such as soil composition, size, pore ratio, water content, the joint characteristics of the rock, and the degree of weathering. If it is located and there is a concern about damage to the adjacent building due to the relaxation of the ground due to excavation, it is common to proceed with the auxiliary method for stabilization of the ground in parallel with the excavation method for constructing the structure.

The most common of these auxiliary methods is the soil nailing method, and the soil nailing method is a reinforcement method that utilizes the shear resistance of the original ground and the pulling resistance of the nail by integrating with the ground by performing grouting after inserting a nail into the ground. .

In general, the soil nailing method applies gravity grouting for a long solidification time, and since grouting is performed 3 to 6 times to compensate for the shrinkage phenomenon, workability is deteriorated due to repeated processes and the length of the air is lengthened. In addition, since the injection pressure cannot be maintained, it is not easy to check the filling state and control the quality.

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

A grouting apparatus provided with a double packer according to the prior art includes a steel pipe 20 having a plurality of grouting material ejection holes penetrating through a side wall, and a shoe 30 installed at an inner end of the steel pipe 20; It is installed on the outside of the steel pipe 20, one end is bound to the high-precision closure 41, the other end is bound to the movable seal 42 so that it can slide on the outer surface of the steel pipe 20, A first packer 40 formed in a bag shape so that the grouting material can be filled therein; A steel rod 60 inserted into the steel pipe 20; A second packer (50) fixedly formed on the outer surface of the steel bar (60) and fitted into the inside of the steel pipe (20); A first grouting material injection hose (70) formed on the outer surface of the steel pipe (20) to transport and inject the grouting material to the first packer (40); A second grouting material injection hose 80 is formed inside the steel pipe 20 to inject a grouting material into the steel pipe 20.

The grouting device according to the prior art solves the problem caused by the use of a sealing material that requires a long solidification time by configuring a packer between the steel pipe (grout pipe) and the perforated hole without a sealing material, and forms a plurality of compartments in the perforated hole. It is very useful in that sufficient grouting can be achieved by allowing grouting to be performed individually for each compartment.

However, as described above, the double packer type grouting device according to the prior art only allows the inner packer located inside the steel pipe and the packer located outside the steel pipe to be expanded by independent expansion means, making efficient construction difficult as well as construction management. Is having difficulty.

In addition, since the double packer type grouting device expands by filling the packer device formed on the outer surface of the steel pipe with urethane or silicone, etc., when the filled sealing material is fired, the packer device cannot be recovered, thereby increasing the cost. .

Registered Patent No. 10-1045727

The present invention was devised to solve the above-described conventional problem, and the grout pipe and the steel pipe installed inside the perforated hole are organically combined and decomposed with each other, and the packer located outside the steel pipe rapidly expands or contracts. Its purpose is to provide a grouting device that can be used.

Packer Shoebel steel pipe simultaneous grouting device according to the present invention to achieve the above object is configured to expand or contract the steel pipe coupled with the grout pipe installed inside the perforation hole by the expansion packer device to perforate the outer surface of the steel pipe It is characterized in that the sealing and opening of the inner wall of the hole can be achieved quickly.

Another object of the present invention is that the grout pipe and the steel pipe are configured as a rotary clamp device to enable disassembly and coupling by a sleeve, and the grout pipe and the steel pipe are configured to be disassembled and coupled, thereby enabling the recovery of the packer device according to the disassembly and coupling. It is characterized.

The grouting device according to the present invention has the advantage of being easy to transport and store and install since it can be organically combined and decomposed between a grout pipe and a steel pipe.

It is possible to recover the packer device according to the combination, so there is an advantage of economical and easy construction management, such as saving construction cost accordingly.

The present invention expands and contracts the packer by means of a rotary clamp device, so it is possible to construct in a faster time without having to wait for a firing time as in the prior art, thereby reducing construction costs as well as shortening the construction period.

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 state of the packer coupled to the steel pipe according to the present invention. 3 is a cross-sectional view of a state in which the grouting pipe and the steel pipe are 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 elements of each drawing, it should be noted that the same elements are to have the same numerals as possible even if they are illustrated in different drawings.

In addition, in the following description of the present invention, when 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.

In addition, terms to be described later are terms set in consideration of functions in the present invention, and since these may vary according to the intention or custom of the producer, the definition should be made based on the contents throughout the present specification.

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

First, simultaneous grouting of a Packer Shoebel steel pipe according to a first embodiment of the present invention will be described with reference to FIGS. 1 to 3.

As shown in Figs. 1 to 3, the packer Shoebel steel pipe simultaneous grouting device according to the first embodiment of the present invention includes a grout pipe 100 inserted into a perforated hole in the ground, and an inside of the grout pipe 100 A plurality of grouting injection hoses and air hoses 200, a steel pipe 300 coupled to an end of the grout pipe 100, an expansion unit 400 coupled to the outside of the steel pipe 300, and the On the opposite side of the coupling portion of the grout pipe 100 and the steel pipe 300, the clamp for packing the packer 10 is coupled in close contact with the pipe 5, and the clamp 20 for dismantling the steel pipe is coupled to the end of the steel pipe. Lose.

The grout pipe 100 is inserted into the perforated hole, and a shoe 40 is installed at the front end thereof to facilitate input when the grout pipe is installed in the perforated hole, and when collapse or deformation of the tunnel or excavation surface is caused, the steel pipe 300 When) acts as a resistor, it also acts as a pull-out resistor in part like the anchor head.

The expander 400 includes at least one packer (2), packing (4), and pipe (50) are sequentially coupled to the outside of the steel pipe, so that the packer tight clamp 100 or the steel pipe disassembly clamp 20 ) To expand or contract.

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

The grout pipe 100 inserted into the perforated hole and the steel pipe 300 coupled to the grout pipe are processed with male threads on the outer surfaces of the coupling ends 50 and 50a of the two pipes, and the grout pipe and the steel pipe are mounted on the inner wall surface. It is configured to rotate the two pipes by coupling the sleeve 30 processed with the female thread to correspond.

The packer (2) and the packing (4) sequentially coupled to the outside of the steel pipe (300) move into the perforated hole by a stopper (40) supported by the sleeve (30) while being fitted to the outside of the steel pipe (300). This is suppressed and the packer 2 expands or contracts according to the rotation of the packer tight clamp 10 to be in close contact or open to the outer wall of the perforated hole.

The packer tight clamp 10 that is installed on the outside of the steel pipe 300 and is supported by the wall of the perforated hole and rotates, forms a male thread on the outer surface of the steel pipe and a female thread on the inner surface of the packer tight clamp 10 It is to expand and contract the packer 2 according to the rotation of the clamp 10 for packing the packer.

The packer (2), which expands and contracts along the outer wall of the steel pipe (300) according to the rotation of the packing clamp (10), is made of urethane rubber with strong mechanical strength and abrasion resistance and impact resistance, and is made of a cylindrical shape, which is inserted into a plurality of steel pipes, and is packed in the middle The load is prevented from concentrating on the packer through the ring (4).

The above-described steel pipe 300 is not completely inserted into the perforated hole, but a part is exposed to the outside of the perforated hole, and a packer tight clamp 10 is installed in the exposed portion to attach the wall around the perforated hole to the packer tight clamp (10). It works while supporting.

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

The clamp 20 for disassembling the steel pipe is for disassembling the coupling end 50a coupled to the sleeve 30 and is preferably made in a state completely fixed to the end of the steel pipe.

The clamp 20 for disassembling the steel pipe is for coupling and dismantling the coupling end of the sleeve 30, and when turned in a clockwise direction, the coupling end 50, 50a and the sleeve are connected, and when turned in a counterclockwise direction, the sleeve rotates or the steel pipe The sleeve or steel pipe is dismantled while only rotating.

When only the steel pipe is disassembled or the sleeve is disassembled together, the steel pipe to which the packer is attached is disassembled in any state, so that the packer can be reused.

FIG. 2 is a diagram showing an expanded state of the packer. When the packer tight clamp 10 coupled to the steel pipe 300 exposed to the outside is rotated clockwise, the packer is compressed and the center swells, so that the inner wall surface of the perforated hole It is in close contact with.

When the applied pressure is released by turning counterclockwise and the clamp 20 for disassembling the steel pipe is rotated, the steel pipe or sleeve coupled to the sleeve is disassembled.

Therefore, the packer Shoebel steel pipe simultaneous grouting device of the present invention can be reused in a simple way, so that it can be usefully used for various purposes.

As described so far, the present invention has been described with reference to the embodiments shown in the drawings, but this is only exemplary, and those of ordinary skill in the field to which the technology pertains, various modifications and equivalent other It will be appreciated that examples are possible.

Therefore, the true technical protection scope of the present invention should be determined by the claims.

2: Packer 4: packing

Claims (5)

A grout pipe 100 inserted into a perforated hole in the ground, a plurality of grouting injection hoses and air hoses 200 inserted into the grout pipe 100, and a steel pipe coupled to the end of the grout pipe 100 300, the expansion part 400 coupled to the outside of the steel pipe 300, and a packer tight clasp 10 and a steel pipe opposite the coupling part of the grout pipe 100 and the steel pipe 300 Simultaneous grouting of Packer Shoebel steel pipe, characterized in that it further comprises a clamp for disassembly (20). The method of claim 1, wherein the grout pipe 100 is inserted into the perforated hole, and a shoe 40 is installed at the tip of the perforated hole by rotational coupling to facilitate input when installing the grout pipe in the perforated hole. When the collapse or deformation of the excavation surface is caused, when the steel pipe 300 serves as a resistor, the packer Seuvel steel pipe simultaneous grouting is characterized in that it also serves as a pull-out resistor partially like the anchor head. According to claim 1, wherein the expander 400 is at least one packer (2), the packing (4) and the pipe (50) are sequentially coupled to the outside of the steel pipe to the packer tight clamp (100) or Simultaneous grouting of Packer Sewell steel pipes, characterized in that the expansion or contraction is performed by a clamp 20 for dismantling the steel pipe. The method of claim 1, wherein the grout pipe 100 inserted into the perforated hole and the steel pipe 300 coupled to the grout pipe are formed by processing the outer surfaces of the coupling ends 50 and 50a of the two pipes with male threads, and Simultaneous grouting of Packer Shoebel steel pipes, characterized in that the sleeve 30 is coupled to the inner wall surface to correspond to the grout pipe and the steel pipe, and the two pipes are rotatably coupled. The method according to claim 3, wherein the packer (2) and the packing (4) sequentially coupled to the outside of the steel pipe (300) are fitted to the outside of the steel pipe (300) and in contact with the sleeve (30). The clamp 10 is configured to suppress movement into the perforated hole by means of the outer surface of the steel pipe 300 and supported by the wall of the perforated hole to rotate. The clamp 10 forms a male thread on the outer surface of the steel pipe and is used for tight packing. Simultaneous grouting of a packer Shoebel steel pipe, characterized in that a female thread is formed on the inner surface of the clamp 10 to expand and contract the packer 2 according to the rotation of the packer tight clamp 10.

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