KR100918681B1 - Apparatus for injecting grout at the same time - Google Patents

Abstract

PURPOSE: A simultaneous grout injection apparatus using a packer and U-turn injection nozzle is provided to be applied to the expansion grouting method and hole grouting method. CONSTITUTION: A simultaneous grout injection apparatus is as follows. One end of a first injection nozzle(10) and one end of a second injection nozzle(20) are connected by a connecting member(30). The first injection nozzles and the second injection nozzles are connected. A plurality of packers(40) are mounted on the first injection nozzle and the second injection nozzle. First gushing holes(11) bored in the first injection nozzles are arranged between the packer. Second gushing holes(21) bored in the second injection nozzles are arranged inside the packers. The first injection nozzles and the second injection nozzles are inserted in a grouting pipe(50). The inside of the grouting pipe is classified into several spaces(D1, D2, D3, D4).

Description

Grout simultaneous injection device using packer and U-turn injection tube {APPARATUS FOR INJECTING GROUT AT THE SAME TIME}

The present invention relates to a grout simultaneous injection device for injecting and solidifying the grout at the same time in the perforated ground for the purpose of increasing the strength and stability of the ground, more specifically, the lower end and the second injection of the first injection pipe The lower end of the tube is connected by a connecting member, the first injection tube and the second injection tube is in communication, a plurality of packer means is mounted on the first injection tube and the second injection tube, and the perforated first injection tube The injection hole is disposed between the partition means, the injection hole perforated in the second injection pipe is related to a grout simultaneous injection device using a packer and a U-turn injection pipe disposed inside the packer means.

Korean Patent No. 10-0756536 (registered on Aug. 31, 2007) of Guilin Hi-Tech Co., Ltd. introduces a "steel pipe reinforced grout simultaneous injection device and a steel pipe reinforced grout simultaneous injection method using the same".

The steel pipe reinforcement-type grout simultaneous injection device is inserted into the multi-stage different length inside the steel pipe is installed a plurality of injection hoses to be injected into the steel pipe grout supplied through an external pump; Grout injection hole is formed at the center of the end of the injection hose by being fixed and fixed on the outer circumferential surface of each injection hose, and when the grout is injected through the pump, the grout is expanded by the injection pressure to block the inner wall of the steel pipe and divide into a plurality. Expansion member for expanding the grout injection hole in the center of the peak to inject the grout; A protective member that is coupled and fixed in an overlapping state in which both ends are not connected to each other on the outer circumferential surface of each of the injection hoses, but covers the circumference of the expansion member with its end open and protects the expansion member when inserted into the steel pipe. ; And grout mixing means for mixing the grout supplied through the injection hose inside the injection hose.

However, the steel pipe reinforcement type grout simultaneous injection device has a hole in which the end opening of the steel pipe in which the pilot bit collected from the steel pipe is bored in the process of ejecting the grout from the expansion member of the longest injection hose is not blocked. The grout is fed to the ground through the end opening of the steel pipe. At this time, when the ground around the end opening of the steel pipe is endemic rock, sand layer, gravel layer, or ionizing layer, the grout discharged through the end opening of the steel pipe flows into the neighboring ground boring hole, and grouting in the neighboring ground boring hole. The question of interfering with the work was raised. In addition, three to four injection hoses, which are consumables, must be inserted into the steel pipe, and the number of pumps is required as much as the number of injection hoses.

Korean Patent No. 10-0643508 (registered on Nov. 1, 2006) of Geo-Gong Co., Ltd. introduces "simultaneous multi-stage injection tube of grout material and multi-stage grouting method using the same".

Simultaneous multi-stage injection pipe of the grout material is formed long in the longitudinal direction and the injection main pipe formed with a plurality of injection nozzles, a plurality of injection hoses having different lengths inserted into the injection main pipe, and the injection main pipe divided into partitions It is installed inside the main pipe, and includes a packer for placing each injection hose in the divided injection main pipe according to the length of the plurality of injection hoses, respectively.

However, the multi-stage injection pipe of the grout material is suitable to be applied to the grouting method of the expansion hole method, and when applied to the grouting method of the direct hole method, the problems pointed out in Korean Patent No. 10-0756536 of Guilin Hi-Tech Co., Ltd. remain as it is. Exposed.

"Geo-injection method" is introduced in Kyodo Engineering Co., Ltd., Republic of Korea Patent No. 10-0792089 (registered on December 28, 2007).

The above ground injection method arranges an exterior having a plurality of exterior discharge ports at different positions in the axial direction in the ground, and has three or more squeezed packers at different positions in the longitudinal direction and is adjacent to each other. Loosely insert a plurality of inner pipes in which each inner tube discharge port is located separately, and the inner pipe has a packer flow path in contact with the three or more constriction packers, and sends fluid to the three or more constriction packers to provide this constriction packer. Two or more external spaces are formed between the expansion and contraction packers adjacent to each other, and the injection liquid is injected into the ground through the external space and the external discharge port from the internal pipe discharge port, and another internal space expansion packer is provided in the external space. One inner tube discharge port is disposed in each space partitioned by the expansion packer in the space.

However, the ground injection method is also suitable to be applied to the expansion hole grouting method, and when applied to the grouting method of the direct drilling method, the problems pointed out in the Republic of Korea Patent No. 10-0756536 of Guilin Hi-Tech Co., Ltd. is exposed as it is.

Korean Patent No. 10-0605562 (July 20, 2006) of Gwangsung GM Co., Ltd. has introduced a "multi grouting injection device."

The multi-grouting injection device includes a packer means for partitioning a plurality of predetermined spaces to be formed in the longitudinal direction in the drilling hole in which the grout is injected, the packer means is a support pipe that is connected to one side of the support plate, and in the longitudinal direction of the support pipe It includes an elastic member provided, and a pressing member for pressing the opposite sides of the elastic member.

However, the multi-grouting injection device has a disadvantage in that the product cost is high because an inner pipe that cannot be recovered after grouting is required for expansion of the elastic member, and the number of pumps corresponding to the number of injection pipes for injecting grout is required. do.

Therefore, the object of the present invention is inexpensive, can be applied to expansion hole grouting method and direct hole grouting method, the inner space of the grouting pipe composed of a plurality of grouting rod is divided into a plurality of compartments by packer means, so that the grout At the same time to provide a grout injection device using a packer and a U-turn injection pipe that can be discharged through the discharge port of the grouting pipe in each compartment.

Grout simultaneous injection device according to the present invention for achieving the above object is connected to one end of the first injection tube and one end of the second injection tube by the connecting member, the first injection tube and the second injection tube is in communication A plurality of packer means is mounted in the first injection tube and the second injection tube, first ejection holes punctured in the first injection tube are disposed between the packer means, and second ejection holes punctured in the second injection tube It is disposed inside the packer means, characterized in that the first injection tube and the second injection tube is inserted into the grouting tube.

The grouting pipe is characterized in that the inside is divided into a plurality of compartments by each packer means.

The first injection tube and the second injection tube is characterized in that made of a plastic material or a metal material.

The connecting member is formed in the rectangular parallelepiped "U" shape, characterized in that the connector that can be connected to the end of the first injection pipe and the second injection pipe at both ends of the through hole.

The packer means includes a cylindrical packing in which a first mounting hole into which the first injection tube is fitted and a second mounting hole into which the second injection tube is fitted, and a first mounting hole and second into which the first injection tube is fitted. A cylindrical second packing in which a second mounting hole into which the injection tube is fitted is formed; Both ends surrounding the circumference of the first packing and the second packing in the curled state are composed of a waterproof cloth fixed by a tie band.

The first packing is characterized in that a first cutout cut from the outer circumferential surface to the first mounting hole and a second cutout cut from the outer circumferential surface to the second mounting hole are formed.

As a result, the grout simultaneous injection device according to the present invention prevents the grout from flowing out to the neighboring grouting tube by preventing the packer means from closing the tip opening of the grouting tube to prevent the grout from being ejected to the outside through the tip opening of the grouting tube. Can be prevented, and each compartment is partitioned by packer means so that the grout pressure of one compartment does not affect the grout pressure of the other compartment, so that grout is ejected uniformly in each compartment, Simple configuration has low cost.

1 is a cross-sectional view and a partially enlarged detailed view showing a grout simultaneous injection device according to the present invention

Figure 2 is a perspective view showing a state in which the packer means is mounted on the first and second injection tube

3 and 4 is a working process diagram showing a process of grouting using a grout simultaneous injection apparatus according to the present invention

5 and 6 is a cross-sectional view showing a state in which the grout simultaneous injection apparatus according to the present invention is disposed obliquely upward and downward

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

Referring to FIG. 1, in the grout simultaneous injection device according to the present invention, one end of the first injection tube 10 and one end of the second injection tube 20 are connected by a connecting member 30 to form a first injection tube ( 10 and the second injection tube 20 is in communication, a plurality of packer means 40 is mounted on the first injection tube 10 and the second injection tube 20, and drilled in the first injection tube 10 First blow holes 11 are disposed between the packer means 40, second blow holes 21 perforated in the second injection pipe 20 are disposed inside the packer means 40, and The first injection tube 10 and the second injection tube 20 are inserted into the grouting tube 50.

As a result, the grout simultaneous injection device according to the present invention simultaneously grouts the grout to the first injection pipe 10 and the second injection pipe 20 through the first pump 60 and the second pump 65. By injection, the grout supplied to the second injection tube 20 is supplied into the packer means 40 through the second ejection hole 21 to expand the packer means 40, thereby expanding each packer means. The grouting pipe 50 is divided into a plurality of compartments D1, D2, D3, and D4 by the 40, and at the same time, the grout supplied to the first injection pipe 10 is first ejection hole 11. It is supplied to each of the plurality of compartments (D1, D2, D3, D4) formed in the grouting pipe (50) through. Then, when the internal pressure of the compartments D1, D2, D3, and D4 is increased by the grout supplied to the compartments D1, D2, D3, and D4, the backflow prevention valve 52 of the grouting pipe 50 is The grout, which is opened and filled in each of the compartments D1, D2, D3, and D4, is simultaneously ejected into the ground through the non-return valve 52 of the compartment. Further, the packer means 40a disposed at the tip end of the grouting tube 50 among the packer means 40 blocks the tip opening of the grouting tube 50 so that the grout (injection material) supplied to the first compartment D1 is provided. It is prevented to be ejected to the outside through the tip opening of the grouting tube (50).

At this time, the grout is discharged from the first injection pipe 10 to the partition space of the grouting pipe 50 through the first injection hole 11, so that the internal pressure of the first injection pipe 10 is reduced to the second injection pipe 20. Care must be taken not to be pushed toward the first pump 60 by the internal pressure of

The first injection tube 10 and the second injection tube 20 may be made of a plastic material or a metal material.

The connecting member 30 is a "U" -shaped curved tube or, as shown in Figure 1, a "U" shaped through-hole 31 is formed in the rectangular parallelepiped, the first injection pipe at both ends of the through-hole 31 10 and the end of the second injection tube 20 may be equipped with a connector (32, 33) that can be connected.

1 and 2, the packer means 40 includes a first mounting hole 41a into which the first injection tube 10 is fitted and a second mounting hole 41b into which the second injection tube 20 is fitted. ) Is formed into a cylindrical first packing 41, a first mounting hole 42a into which the first injection tube 10 is fitted, and a second mounting hole 42b into which the second injection tube 20 is fitted. A cylindrical second packing 42 formed therein; Both ends surrounding the circumference of the first packing 41 and the second packing 42 in a rounded state are composed of a waterproof cloth 43 fixed by a tie band 44.

The first packing 41 has a first cutout 41c cut out from the outer circumferential surface to the first mounting hole 41a and a second cutout 41d cut out from the outer circumferential surface to the second mounting hole 41b. do. As a result, the first injection pipe 10 can be inserted into the first mounting hole 41a through the first cutout 41c, and the second injection pipe 20 can be inserted through the second cutout 41d. It can be fitted into the second mounting hole 41b, so that the first packing 41 can be easily attached to the first injection pipe 10 and the second injection pipe 20. In addition, when tying one end of the round-shaped waterproof cloth 43 wound around the first packing 41 with the tie band 44, the first packing 41 is connected to the first injection tube by the tie band 44. 10) and the second injection tube 20 is fixed.

The second packing 42 also has the same configuration as the first packing, and is fixed to the first injection pipe 10 and the second injection pipe 20 by the tie band 44 like the first packing.

The waterproof cloth 43 should have a waterproof function so as to withstand the pressure of the grout supplied through the second ejection hole 21 of the second injection pipe 20 so that the internal pressure does not easily leak to the outside. . The waterproof cloth is known to satisfy the above properties of a rubber-coated cloth or a fabric referred to as a "parachute spring".

The grouting method of the direct drilling method using the grout simultaneous injection apparatus according to the present invention configured as described above will be described with reference to FIGS.

A) Perforate the ground (G) to reinforce the tunnel or slope (see Figure 3). At this time, the rod 70 in which the pilot bit 75 is mounted is disposed in the grouting pipe 50 in which the shoe bit 55 is mounted, and a drilling hole is formed in the ground by the pilot bit and the shoe bit.

B) When the drilling operation is completed, the pilot bit 75 is retracted in the reverse direction of the drilling direction to separate the rod 70 and the pilot bit 75 from the grouting pipe 50.

4) Then, as shown in Figure 4, the packer means 40 is mounted and the grouting tube 50 to the first injection tube 10 and the second injection tube 20 communicated with each other by the connecting member 30 ). At this time, the connection member 30 descends to the lower end of the grouting pipe 50 in which the shoe bit 55 is mounted.

D) Then, the inlet of the grouting tube 50 is sealed with a caulking material (80).

E) The first and second pumps 60 and 65 are connected to the first and second injection pipes 10 and 20, respectively, to supply grout to the first and second injection pipes 10 and 20. As a result, as described above, the grout supplied to the second injection pipe 20 is supplied to the inside of the packer means 40 through the second ejection hole 21, so that the waterproof cloth 43 of the packer means 40 is provided. ), The inside of the grouting tube 50 is partitioned into a plurality of compartments D1, D2, D3, D4 by the waterproof cloth 43 of the expanded packer means 40, and at the same time, the first The grout supplied to the injection pipe 10 is respectively supplied to the plurality of partition spaces D1, D2, D3, and D4 formed in the grouting pipe 50 through the first ejection hole 11, thereby providing the partition space D1. , The backflow prevention valve 52 of the grouting pipe 50 is opened by the pressure of the grout to be filled in the D2, D3, D4, so that the grout filled in each compartment is returned through the backflow prevention valve of the respective compartment. At the same time, it erupts into the ground. At this time, since the same pressure is applied to each of the compartments D1, D2, D3, and D4, the packer means 40 does not push to either side, and the packer means 40 seals the inner circumferential surface of the grouting pipe 50. Therefore, by preventing the grout of the partition space D1 from being blown out to the outside through the tip opening of the grouting pipe 50 on which the shoe bit 55 is mounted, it is possible to prevent the grout from flowing back to the neighboring grouting pipe. .

Here, in order to grout a tunnel or a slope or the like, as shown in FIG. 5, the grouting pipe 50 is inclined upwardly at a predetermined angle a (for example, a = 15 °) with respect to the horizontal line H (G). 6), or as shown in Fig. 6, the grouting tube 50 is inserted into the ground G inclined downward at a predetermined angle a (e.g., a = 15 °) with respect to the horizontal line H. Grout discharge pressure (grout injection amount) ejected through the non-return valve of the grouting pipe 50 in the partition space D1 between the first packer means 40a and the second packer means 40b, and the second The grout discharge pressure ejected from the compartment space D2 between the packer means 40b and the third packer means 40c, and the compartment space D3 between the third packer means 40c and the fourth packer means 40d. Discharge pressure of the grout sprayed from the grout sprayed in the partition space D4 between the fourth packer means 40d and the caulking material 80 Equal to each other.

This is because when grout is injected into the first injection tube 10, the grout is injected into the second injection tube 20 at the same time, so that the grout pressure injected into the second injection tube 20 is reduced by the first injection tube 10. The pressure of each of the compartments D1, D2, D3, and D4 becomes the same as the back pressure relative to the grout pressure to be injected into the first compartment space D1 and the second compartment. D2) is blocked by the second packer means 40b, the second compartment D2 and the third compartment D3 are blocked by the third packer means 40c, and the third compartment D3. And the fourth compartment D4 are blocked by the fourth packer means 40d, so that the pressure in each compartment affects the pressure in the neighboring compartment even if the grouting pipe 50 is disposed obliquely upwards or downwards. Because it does not give.

In addition, the grout simultaneous injection device according to the present invention uses only two injection pipes, the configuration of the packer means 40 and the connecting means 30 is simple, the production cost is low, the transport of the injection pipe is convenient, from above As described, an incision is formed in the packing of the packer means, so that the packing of the packer means can be easily mounted at any position of the infusion tube through the incision, so that the connection work of the infusion pipe is interfered by the packer means. You can prevent it.

Claims (6)

One end of the first injection tube 10 and one end of the second injection tube 20 are connected by the connecting member 30, the first injection tube 10 and the second injection tube 20 is in communication, A plurality of packer means 40 are mounted in the first injection tube 10 and the second injection tube 20, and the first ejection holes 11 drilled in the first injection tube 10 are interposed between the packer means 40. The second injection holes 21 which are arranged in the second injection tube 20 and are drilled in the second injection tube 20 are disposed inside the packer means 40, and the first injection tube 10 and the second injection tube 20 are The grouting pipe 50 is divided into a plurality of compartments D1, D2, D3, and D4 by being inserted into the grouting pipe 50, and a plurality of ejection holes in which the backflow prevention valve 52 is mounted are formed in the grouting pipe wall. Grout simultaneous injection device using a packer and u-turn injection tube, characterized in that the. delete The method of claim 1, The first injection tube 10 and the second injection tube 20 is a grout injection device using a packer and a U-turn injection tube, characterized in that made of a plastic material or a metal material. The method of claim 1, The connecting member 30 is formed in a rectangular parallelepiped "U" -shaped through hole 31, the ends of the first injection tube 10 and the second injection tube 20 may be connected to both ends of the through hole 31. Grout simultaneous injection device using a packer and u-turn injection tube, characterized in that the connector (32, 33) is mounted. The method of claim 1, The packer means 40 has a cylindrical first shape in which a first mounting hole 41a into which the first injection tube 10 is fitted and a second mounting hole 41b into which the second injection tube 20 is fitted are formed. Cylindrical second packing having a packing 41, a first mounting hole 42a into which the first injection tube 10 is fitted, and a second mounting hole 42b into which the second injection tube 20 is fitted. (42); Packer, characterized in that the both ends surrounding the first packing 41 and the second packing 42 in the curled state is composed of a waterproof cloth 43 is fixed by a tie band (44); Grout simultaneous injection device using U-turn injection tube. The method of claim 5, wherein The first packing 41 has a first cutout 41c cut out from the outer circumferential surface to the first mounting hole 41a and a second cutout 41d cut out from the outer circumferential surface to the second mounting hole 41b. Grout simultaneous injection device using a packer and u-turn injection tube, characterized in that the.