KR102364979B1 - Double tube packer capable of complex grouting - Google Patents

Abstract

The present invention relates to a packer, and more particularly, to a double pipe packer that is used for an injection method for increasing the order and ground strength on the back of the earth wall method during underground excavation in a downtown area, so that rapid and complete complex injection is possible. To this end, the first chemical is injected, the first injection tube 100 arranged on the axis; a second upper injection tube 200 through which the second chemical is injected, and the tube end 125 is adjacent to the first injection tube 100; The first injection tube 100 passes on the axis, the tube end 125 is inserted into the upper surface, and the upper hollow portion 222 and the upper hollow portion 222 formed to be eccentric with respect to the axis are partially in communication, a head portion 220 having a lower hollow portion 224 formed to be concentric with respect to the axis; a second lower injection tube 210 communicating with the hollow portion 224 on the lower surface of the head portion 220 and being concentric with the first injection tube 100 and arranged around the first injection tube 100; One end is fastened to the lower surface of the head portion 220, the expandable rubber tube (300); and an air tube 140 that communicates between the second lower injection tube 210 and the rubber tube 300 from the upper surface of the head 220; is provided

Description

Double tube packer capable of complex grouting

The present invention relates to a double pipe packer capable of rapid and complete complex injection, and more particularly, it is used in the chemical liquid injection method to increase the order and ground strength on the back of the earth wall during underground excavation in downtown areas. It relates to a double-tube packer capable of complex injection of rapid results and completion in the form of a double-tube to be injected.

In general, chemical liquid injection is performed by inserting an injection tube into the ground, and using the inserted injection tube to pump and fill the chemical liquid (injection material) into the ground, and when a certain period of time elapses, the ground is solidified. , index) or to increase the ground strength for that purpose.

In Korea, among several chemical injection methods, use a rotating water flush drilling machine to drill the casing to a predetermined depth, insert the menjet tube into the casing, fill the gap between the casing and the menjet tube, and fill the casing with a filling material (cement + bentonite solution). The LW (Labiles Wasser Glass) method, which draws, inserts a packer into the menjet tube and injects a finished material with a long gel time, is used as a representative injection method of the two-component one-step process.

Compared to other chemical injection methods, the LW method is more complicated than other chemical injection methods, as it adds a process of drilling a hole through a casing, inserting a menthenette tube, and injecting a filling material (cement + bentonite solution). Because of the injection, there was a problem in that it deviated from the injection range and caused damage to nearby underground facilities.

And among the tunnel auxiliary methods in Korea, drilling with a pneumatic drilling machine, inserting small and large diameter steel pipes, caulking the inlet, and injecting filler (cement + bentonite solution) into the gap between the ground and the steel pipe, and then inserting a packer into the steel pipe There is a steel pipe reinforcement grouting method that is injected by

However, in the steel pipe reinforcement grouting method, the main injection should be carried out after 12 to 24 hours have elapsed after the filling material (cement + bentonite solution) is injected into the gap between the ground and the steel pipe. was a factor causing the delay of

In addition, among the various chemical injection methods in Korea, a double pipe rod connected with an injection tip device is mounted on a rotating flush perforator and drilled, and then a large void is filled by first injecting a quick-setting material, and a secondary filling material is injected to fill even a small void. The SGR (Space Grouting Rocket System) method is used as a representative method of the two-component two process.

However, since the SGR method is drilled by attaching a double pipe rod connected to the injection tip device to the rotating water flush drilling machine, foreign substances such as quartz particles enter the injection tip device and the injection tip device does not work properly, and the injection pressure due to the above problem This spike often caused the injection process to stop.

1. Republic of Korea Patent Registration No. 10-0981433 (Rod pipe reinforcement grouting double packer device and injection hole caulking method using the same), 2. Republic of Korea Patent Registration No. 10-2103791 (co-injected grouting steel pipe using double packer).

Accordingly, the present invention has been devised to solve the above problems, and the present invention provides that the first chemical solution (main material) and the second chemical solution (gel-forming reactant) are supplied to the tip of the packer while being separated from each other, The packer is provided in the form of a double tube so that the first and second chemical solutions are mixed to form a gel from the moment the first chemical solution (main material) and the second chemical solution (gel-forming reaction material) are discharged from the tip of the packer.

However, the technical problems to be achieved in the present invention are not limited to the technical problems mentioned above, and other technical problems that are not mentioned are clearly to those of ordinary skill in the art to which the present invention belongs from the description below. can be understood

In order to achieve the above technical problem, the first chemical is injected, the first injection pipe 100 arranged on the axis; a second upper injection tube 200 through which the second chemical is injected, and the tube end 125 is adjacent to the first injection tube 100; The first injection tube 100 passes on the axis, the tube end 125 is inserted into the upper surface, and the upper hollow portion 222 and the upper hollow portion 222 formed to be eccentric with respect to the axis are partially in communication, a head portion 220 having a lower hollow portion 224 formed to be concentric with respect to the axis; a second lower injection pipe 210 communicating with the lower hollow part 224 on the lower surface of the head part 220 and being concentric with the first injection pipe 100 and arranged around the first injection pipe 100; One end is fastened to the lower surface of the head unit 220, an inflatable rubber tube 300; and an air pipe 140 that communicates from the upper surface of the head unit 220 to the second lower injection pipe 210 and the rubber pipe 300; provided

In addition, the circumference of the first injection tube 100 and the circumference of the second upper injection tube 200 on the upper surface of the head unit 220 are sealed by the upper welding portion (120).

In addition, a male screw part 240 is further formed on the lower surface of the head part 220 .

In addition, the O-ring 230 may be further fitted to the male screw portion 240 .

In addition, in the upper portion of the rubber tube 300, the inner surface of the sealing portion 317 to be in close contact with the O-ring 230, the upper tube 310 formed with a female screw portion 315 capable of fastening with the male screw portion 240 is further formed. can be connected

In addition, the lower end of the male screw part 240 and the circumference of the second lower injection pipe 210 may be sealed by the lower welding part 130 .

In addition, a lower pipe 320 made of a metal material may be further connected to the lower portion of the rubber pipe 300 .

In addition, the inner surface of the rubber tube 300 and the outer surface of the second lower injection tube 210 are spaced apart to form an air tube 140 .

In addition, the air pipe 140, the air injection pipe 110 installed on the upper surface of the head unit 220; and an upper air tube 115 penetrating from the air injection tube 110 to the lower surface of the head 220 , wherein the air tube 140 communicates with the upper air tube 115 .

The length of the rubber tube 300 is in the range of 30 cm to 100 cm.

According to the present invention, the first and second chemical solutions are separately injected into the first injection tube and the second injection tube and are mixed at the tip of the double tube packer. Therefore, there is no unexpected load on the injection process.

Therefore, as the first and second chemical solutions are mixed at the tip of the double tube packer and penetrated between the pores in the ground, a gel is formed and solidified like soil particles, thereby exerting the effect of increasing the order and ground reinforcement.

However, the effects obtainable in the present invention are not limited to the above-mentioned effects, and other effects not mentioned will be clearly understood by those of ordinary skill in the art to which the present invention belongs from the following description. will be able

The following drawings attached to this specification illustrate preferred embodiments of the present invention, and serve to further understand the technical spirit of the present invention together with the detailed description of the present invention to be described later, so that the present invention is described in such drawings It should not be construed as being limited only to
1 is a front view of a double pipe packer capable of complex injection of rapid results and completion according to an embodiment of the present invention;
Figure 2 is a front view showing a state in which the rubber tube 300 is separated from the double tube packer shown in Figure 1;
3 is an enlarged cross-sectional view of part A of FIG. 2;
4 is a plan sectional view in the AA direction in FIG. 1;
5 is a plan sectional view in the BB direction in FIG. 1;
6 is a plan sectional view in the CC direction in FIG. 1;
7 is a plan sectional view in the DD direction in FIG. 1;
8 is an enlarged cross-sectional view of part B in FIG. 2;
9 is a flowchart of a construction method using a double pipe packer according to the present invention;
Figure 10 is a working view of the casing perforation step (S100) of Figure 9;
11 is a working diagram of the casing drawing step (S110) of FIG. 9;
12 is a working diagram of the insertion (S120) and the rapid payment injection step (S130) of the double tube packer in FIG. 9;
13 is a working diagram of the final material injection step (S140) in FIG. 9;
14 is a working diagram of a continuous process through the partial elevation (S150) of the double tube packer.

Hereinafter, with reference to the accompanying drawings, embodiments of the present invention will be described in detail so that those of ordinary skill in the art can easily carry out the present invention. However, since the description of the present invention is merely an embodiment for structural or functional description, the scope of the present invention should not be construed as being limited by the embodiment described in the text. That is, since the embodiment may have various changes and may have various forms, it should be understood that the scope of the present invention includes equivalents capable of realizing the technical idea. In addition, since the object or effect presented in the present invention does not mean that a specific embodiment should include all of them or only such effects, it should not be understood that the scope of the present invention is limited thereby.

The meaning of the terms described in the present invention should be understood as follows.

Terms such as “first” and “second” are for distinguishing one component from another, and the scope of rights should not be limited by these terms. For example, a first component may be termed a second component, and similarly, a second component may also be termed a first component. When a component is referred to as “connected” to another component, it may be directly connected to the other component, but it should be understood that other components may exist in between. On the other hand, when it is mentioned that a certain element is "directly connected" to another element, it should be understood that the other element does not exist in the middle. Meanwhile, other expressions describing the relationship between elements, that is, "between" and "between" or "neighboring to" and "directly adjacent to", etc., should be interpreted similarly.

The singular expression is to be understood to include the plural expression unless the context clearly dictates otherwise, and terms such as "comprises" or "have" refer to the specified feature, number, step, action, component, part or these It is intended to indicate that a combination exists, and it should be understood that it does not preclude the possibility of the existence or addition of one or more other features or numbers, steps, operations, components, parts, or combinations thereof.

All terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs, unless otherwise defined. Terms defined in the dictionary should be interpreted as being consistent with the meaning of the context of the related art, and cannot be interpreted as having an ideal or excessively formal meaning unless explicitly defined in the present invention.

embodiment composition

Hereinafter, the configuration of the preferred embodiment will be described in detail with reference to the accompanying drawings. 1 is a front view of a double pipe packer capable of rapid and complete complex injection according to an embodiment of the present invention, and FIG. 2 is a front view showing a state in which the rubber pipe 300 is separated from the packer shown in FIG. As shown in Figures 1 and 2, the first injection tube 100 is the first chemical is injected, arranged in the axial direction. The first injection tube 100 is a metal tube having a diameter of about 10 to 15 mm.

In an embodiment of the present invention, the purity material is a material with a gel time of 5 to 20 seconds generated by stirring the first and second chemical solutions, and the final material has a gel time generated by stirring the first and second chemical solutions of 40 to 90 It is a superintrinsic substance.

The second upper injection pipe 200 is a hollow part 224 inside the head part 220 after the second chemical solution is injected and bent by about 10 to 30° in the pipe end 125 region. is accepted in The second upper injection tube 200 is a metal tube having a diameter of about 10 to 15 mm.

The first injection tube 100 is of sufficient length (eg, 100 cm) to be exposed past the rubber tube 300 and the lower tube 320 , and the second lower injection tube 210 is the first injection tube 100 . It has a slightly shorter length so that the bottom of it can be exposed. The upper pipe 310, the rubber pipe 300, and the lower pipe 320 have a short length so that the lower end of the second lower injection pipe 210 is exposed.

FIG. 3 is an enlarged cross-sectional view of portion A of FIG. 2 . As shown in FIG. 3 , the head 220 is made of a metal material, and the first injection tube 100 passes through the center of the axial line of the upper surface. A second upper injection tube 200 is located near the first injection tube 100 on the upper surface. An air injection pipe 110 is installed on one side of the upper surface to function as a socket or port for connecting a pneumatic pipe.

The upper welded portion 120 is formed around the perimeter of the first injection tube 100 and the second upper injection tube 200 on the upper surface of the head portion 220 and sealed.

The upper hollow portion 222 is formed to be eccentric while including the axis with respect to the axis, and can be machined by drilling. The lower hollow part 224 partially communicates with the upper hollow part 222 and is formed to be concentric with respect to the axis. The lower hollow part 224 can also be machined by a drilling operation.

The upper air pipe 115 is formed through from the air injection pipe 110 of the upper surface of the head 220 to the lower surface of the head 220 . The upper air pipe 115 guides the supplied pneumatic pressure (eg, 10 to 15 bar) between the second lower injection pipe 210 and the rubber pipe 300 so that the rubber pipe 300 is expanded.

A male screw part 240 is further formed on the lower surface of the head part 220 . The male screw part 240 is screwed with the upper pipe 310 to fix the position of the rubber pipe 300 .

The O-ring 230 is positioned between the head part 220 and the male screw part 240 or on the male screw part 240 to increase the sealing force to prevent air pressure from leaking.

The second lower injection pipe 210 communicates with the hollow part 224 on the lower surface of the head part 220 and is arranged around the first injection pipe 100 while forming concentric with the first injection pipe 100 . That is, the first injection tube 100 is assembled while maintaining concentric circles inside the second lower injection tube 210 .

The lower welded portion 130 is formed around the lower end of the male screw portion 240 and the second lower injection pipe 210 to seal the liquid from leaking.

FIG. 8 is an enlarged cross-sectional view of a portion B in FIG. 2 . As shown in FIG. 8 , the upper pipe 310 is installed on the upper part of the rubber pipe 300 , and forms a sealing part 317 in close contact with the O-ring 230 on the inner surface, and extending from the sealing part 317 . A female screw portion 315 capable of being fastened to the male screw portion 240 is formed on the inner surface.

The rubber tube 300 has an upper tube 310 installed at the upper end, and a lower tube 320 installed at the lower end. The upper pipe 310 seals the upper part of the rubber pipe 300 , and the lower pipe 320 functions to seal the lower part of the rubber pipe 300 . Also between the lower pipe 320 and the second lower injection pipe 210, welding or an O-ring (number not assigned) may be provided for sealing. The rubber tube 300 may be expanded by pneumatic pressure supplied between the inner surface of the rubber tube 300 and the outer surface of the second lower injection tube 210 (air tube 140) to be tightly fitted to the inner wall of the packer injection tube.

FIG. 4 is a plan cross-sectional view in the direction A-A in FIG. 1 . As shown in FIG. 4 , the first injection tube 100 is positioned concentrically with the head 220 , and the second upper injection tube 200 is positioned adjacent to the first injection tube 100 .

FIG. 5 is a plan cross-sectional view taken in a direction B-B in FIG. 1 . 5, the first injection tube 100, the second lower injection tube 210, the rubber tube 300 and the O-ring 230 are arranged on the same concentric circle.

6 is a plan cross-sectional view taken along a direction C-C in FIG. 1 . 6 is a state before the rubber tube 300 is expanded. As shown in FIG. 6 , an air tube 140 is formed between the inner surface of the rubber tube 300 and the second lower injection tube 210 to radially expand the rubber tube 300 with sufficient pressure.

FIG. 7 is a plan cross-sectional view taken in a direction D-D in FIG. 1 . As shown in FIG. 7 , the first chemical solution may be discharged through the first injection pipe 100 , and the second chemical solution may be discharged through the second lower injection pipe 210 .

double tube Packer's movement

Hereinafter, the operation of the preferred embodiment will be described in detail with reference to the accompanying drawings. First, the borehole is drilled and the casing 450 is inserted, and then, the injection tube 440 is inserted into the casing 450 .

Next, a double tube packer capable of complex injection of rapid results and completion according to the present invention is put into the interior of the injection exterior 440 . When a double pipe packer capable of rapid and complete complex injection is input to a predetermined depth in the ground, air is supplied through the air injection pipe 110 . The supplied air expands the rubber tube 300 to firmly position and fix the packer on the inner wall of the injection tube 440 .

Next, the first chemical solution is injected into the first injection pipe 100 , and the second chemical solution is injected into the second upper injection pipe 200 at the same time or slightly sequentially. The first chemical is discharged from the lower end of the first injection tube 100 after passing through the first injection tube (100). The second chemical solution is approached in the circumferential direction of the axis while passing the upper hollow part 222 and the lower hollow part 224 of the head part 220 in the second upper injection pipe 200, and the second lower injection pipe ( 210) through the lower end. That is, the first and second chemical liquids pass through both the first injection tube 100 and the second lower injection tube 210 and are mixed at the bottom of the double tube packer and penetrate into the pores of the ground to form a gel, and They are solidified together, and the effects of water protection and ground reinforcement are exhibited.

Then, the air is discharged through the air injection pipe 110, and the rubber pipe 300 is recovered. Thereafter, the double pipe packer capable of complex injection of rapid results and completion is partially raised (480) by a predetermined length (about 50 to 70 cm), and then the above-described process is repeated. That is, while ascending in units of a predetermined length from the lower end of the injection exterior 440 , the above-described process is repeated to reach the ground 410 .

Construction method using double pipe packer

9 is a flowchart of a construction method using a double pipe packer according to the present invention, and FIG. 10 is a working diagram of the casing perforation step (S100) of FIG. As shown in FIGS. 9 and 10 , first, a hole into which the casing 450 can be inserted is drilled using a perforator 400 and a perforator drill 420 in the ground 410, and the casing 450 is is inserted (S100). At this time, the perforated water 430 is injected together and the perforated soil is discharged to the ground 410 .

Next, Figure 11 is a working diagram of the casing drawing step (S110) of Figure 9. 11, after inserting the injection tube 440 into the casing 450, the casing 450 is pulled out (S110).

Next, Figure 12 is a working diagram of the insertion (S120) and the rapid payment injection step (S130) of the double tube packer in Figure 9. As shown in Fig. 12, the double tube packer of the present invention is inserted into the injection tube 440 (S120). By injecting air into the rubber tube 300 of the double tube packer, it is firmly positioned inside the injection exterior 440 . Then, the quick-setting material 465 is fed by pressure to the first injection tube 100 and the second injection tube 200 (S130). Due to the rapid payment material 465, a rapid payment sealing 460 is formed around the injection exterior 440 .

Next, FIG. 13 is a working diagram of the final material injection step ( S140 ) of FIG. 9 . As shown in FIG. 13 , the finishing material 470 is fed by pressure to the first injection tube 100 and the second upper injection tube 200 ( S140 ).

14 is a working diagram of a continuous process through a partial elevation (S150) of the double pipe packer. As shown in Fig. 14, after the air is removed from the rubber tube 300, the double tube packer is raised by a partial rise 480 (S150). Then, the above-described rapid payment material injection step (S130), the final material injection step (S140) and the partial rising step (S150) are repeatedly performed. Thereby, it is possible to form a constant injection solidification body 490 around the injection exterior 440 up to the ground surface 410 .

The detailed description of the preferred embodiments of the present invention disclosed as described above is provided to enable any person skilled in the art to make and practice the present invention. Although the above has been described with reference to preferred embodiments of the present invention, it will be understood by those skilled in the art that various modifications and changes can be made to the present invention without departing from the scope of the present invention. For example, those skilled in the art can use each configuration described in the above-described embodiments in a way in combination with each other. Accordingly, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

The present invention may be embodied in other specific forms without departing from the spirit and essential characteristics of the present invention. Accordingly, the above detailed description should not be construed as restrictive in all respects but as exemplary. The scope of the present invention should be determined by a reasonable interpretation of the appended claims, and all modifications within the equivalent scope of the present invention are included in the scope of the present invention. The present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein. In addition, claims that are not explicitly cited in the claims may be combined to form an embodiment, or may be included as new claims by amendment after filing.

100: first injection tube,
110: air injection pipe,
115: upper air pipe,
120: upper weld,
125: tube end,
130: lower welding part,
140: air tube,
200: second upper injection pipe,
210: the second lower injection pipe,
220: head,
222: upper hollow part,
224: lower hollow part,
230: O-ring,
240: male thread part,
300: rubber tube,
310: upper pipe,
315: female thread part,
317: sealing part;
320: lower pipe,
400: perforator,
410: ground,
420: perforation drill,
430: number of punches,
440: injection appearance,
450: casing,
460: quick payment sealing,
465: quick payment,
470: final material,
480: partial rise,
490: injection solidified body.

Claims (10)

a first injection tube 100 through which the first chemical is injected and arranged on the axis;
a second upper injection tube 200 through which a second chemical is injected, the tube end 125 being close to the first injection tube 100;
Located at the tip of the packer, the first injection tube 100 passes on the axis, the tube end 125 is inserted into the upper surface, and the upper hollow 222 is formed so as to be eccentric with respect to the axis, the upper portion a head portion 220 partially communicating with the hollow portion 222 and having a lower hollow portion 224 formed to be concentric with the axis;
A second lower injection pipe communicating with the lower hollow part 224 on the lower surface of the head part 220 and being concentric with the first injection pipe 100 and arranged around the first injection pipe 100 . (210);
One end is fastened to the lower surface of the head portion 220, an expandable rubber tube 300; and
and an air pipe 140 communicating from the upper surface of the head 220 to the second lower injection pipe 210 and the rubber pipe 300;
The circumference of the first injection pipe 100 and the circumference of the second upper injection pipe 200 on the upper surface of the head part 220 are sealed by the upper welding part 120,
A male screw part 240 is formed on the lower surface of the head part 220,
An O-ring 230 is fitted to the male screw part 240,
In the upper portion of the rubber tube 300, an inner surface of the sealing portion 317 is formed in close contact with the O-ring 230, the upper tube 310 is formed with a female screw portion 315 that can be fastened to the male screw portion 240. connected,
The lower end of the male screw part 240 and the circumference of the second lower injection pipe 210 are sealed by the lower welding part 130,
A metal lower pipe 320 is connected to the lower portion of the rubber pipe 300,
The inner surface of the rubber tube 300 and the outer surface of the second lower injection tube 210 are spaced apart to form the air tube 140,
The air tube 140 is
an air injection pipe 110 installed on the upper surface of the head 220; and
Including a;
The air tube 140 is a double tube packer capable of complex injection of rapid results, characterized in that it communicates with the upper air tube (115). delete delete delete delete delete delete delete delete The method of claim 1,
The double tube packer capable of rapid and complete complex injection, characterized in that the length of the rubber tube 300 is in the range of 30 cm to 100 cm.

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