KR20060074816A - Method of pouring into ground - Google Patents

Abstract

<Problem> By using a squeezing packer, a part of an exterior discharge port can be occluded long, the inner pipe discharge port can be moved up and down freely, and simultaneous injection is possible by providing three or more expansion packers.

<Solution> The inner tube 5 having three or more swelling packers 6 is loosely inserted into the outer surface 3 installed in the ground 1, and the fluid is sent to the swelling packer 6 to expand and expand the inner tube outlet 7 ), The injection liquid is simultaneously injected, and then the fluid is discharged from the expansion packer 6 to contract, the inner tube 5 is moved to move the injection stage, and the expansion pack 6 is expanded to repeat the injection liquid. It is injected simultaneously into the ground (1).

Description

Ground injection method {METHOD OF POURING INTO GROUND}

BRIEF DESCRIPTION OF THE DRAWINGS It is sectional drawing for demonstrating the process of the ground injection method of this invention.

2 is a cross-sectional view of a state in which the inner tube is moved to another injection stage by discharging the fluid from the expansion packer.

FIG. 3 is a cross-sectional view of a state in which the expansion packer of FIG. 2 is expanded to perform injection from another injection stage.

4 is a cross-sectional view showing a state where a plurality of inner tubes are used.

FIG. 5 is a cross-sectional view of a state in which the fluid is discharged from the expansion packer of FIG. 4 and the plurality of inner tubes are moved to another injection stage.

FIG. 6 is a cross-sectional view of a state in which the expansion packer of FIG. 5 is expanded to perform injection from another injection stage. FIG.

It is sectional drawing of the state which provided another expansion packer in the exterior space.

FIG. 8 is a cross-sectional view of a state where the fluid is discharged from the expansion packer of FIG. 7 and the plurality of inner tubes are moved to another injection stage.

FIG. 9 is a cross-sectional view of a state in which the expansion packer of FIG. 8 is expanded to perform injection from another injection stage. FIG.

10 is a cross-sectional view of an injection tube actually used.

11 is a sectional view of a known injection tube.

<Explanation of symbols for the main parts of the drawings>

1: Ground

2: appearance discharge port

3: appearance

5: inner tube

6: bulking packer

7: inner tube discharge port

8: packer euro

9: interior space

10: freezing area

11: squeeze packer in space

12: partitioned space

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to ground injection methods such as soft ground, leaky ground, and the like. Specifically, by using a swelling packer as a packer, the swelling of the packer is free, and thus, the packer is expanded to a long length. A part of the exterior discharge port can be closed and further contracted, so that the inner tube can be moved up and down in the exterior. In addition, by providing three or more of these expansion packers, it can be injected simultaneously from two or more exterior discharge ports. The present invention relates to a ground injection method which can not only allow complex injection by polymerizing purity grout or permeable grout, but also can simultaneously inject from a plurality of exterior discharge ports.

Conventionally, the injection method using the injection pipe 20 shown in FIG. 11 is known as a ground injection method of soft ground, leaking ground, etc. (Japanese Patent No. 2772637)

In FIG. 11, the injection pipe 20 has an outer tube 21 and an inner tube 22. In the installation in the ground 23, the outer tube 21 is first installed in the ground 23. Arbitrary plurality of discharge ports 25, 25... 25 are opened in the outer wall 21 in the tube wall 24 at different positions in the axial direction. These discharge ports 25 are all covered by the rubber sleeve 26.

Next, the inner tube 22 is loosely inserted into the exterior 21. Arbitrary plurality of injection ports 28, 28... 28 are also opened in the inner wall 21 in the pipe wall 27 at different positions in the axial direction. The injection holes 28, 28 ... 28 are reduced and opened as small as possible, thereby generating pressure in the tube with respect to the amount of liquid supplied per injection in the inner tube 22, and injecting the same. The liquid is injected into the space 31 from the injection hole 28.

Moreover, at least 3 packers 30, 30 ... 30 are arrange | positioned at the other position of the longitudinal direction of the pipeline 29 formed in the clearance gap between the inner tube 22 and the exterior 21, and these are mutually spaced by this. A plurality of independent spaces 31 are formed in the longitudinal direction between adjacent packers 30 and 30, that is, between upper and lower packers 30 and 30 adjacent to each other. In addition, packers 30 and 30 are arranged in each of these spaces 31 such that at least one external discharge port 25 and an inner tube injection port 28 are located.

In the injection, the sleeve grout 32 is injected and sealed into the gap between the outer appearance 21 and the ground 23 in the injection, using the injection pipe device 20 configured as described above. Next, the injection liquid is introduced from the conduit 22a of the inner tube 22, and the injection liquid is injected into the respective spaces 31 and 31 from the injection holes 28, 28, 28 of the inner tube 22 as shown by arrows. The rubber sleeve 26 is pushed and expanded through the discharge port 25 of the exterior 21 located in each space 31, 31... 31, and the sleeve grout 32 is split to penetrate and inject into the ground 23.

However, the packer 30 which exists in the injection pipe 20 of the well-known technique mentioned above is comprised by the rubber ring, for this reason, it cannot move the inner pipe 22, and also cannot make a packer long. Complex injections of either pure or permeable grout are not possible. In addition, in the well-known injection pipe 20 mentioned above, when earth pressure is deformed and deform | transformed, an inner pipe will not be able to move at all.

<Patent Document 1> Patent No. 2772637

Therefore, the problem to be solved by the present invention is that by using three or more swelling packer in place of the rubber ring as a packer, by expanding the packer in a long length, it is possible to occlude a part of the appearance discharge port, and further shrink the inner tube up and down It can be moved, thereby making it possible not only to carry out the composite injection in which the pure grout or the permeable grout is polymerized, but also to simultaneously inject from a plurality of exterior discharge ports, and to provide a ground injection method which improves the defects existing in the above-mentioned known techniques. It is in doing it.

MEANS TO SOLVE THE PROBLEM In order to solve the above-mentioned subject, according to this invention, the external appearance which has a some external appearance discharge port is provided in the ground at the other position of an axial direction, and in this external appearance, it has three or more squeeze packers in another position of the longitudinal direction, In addition, the inner tube having the inner tube discharge port is loosely inserted between the adjacent expansion packers, and the fluid is sent to the three or more expansion packers, thereby expanding the expansion packers to form two or more interior spaces between the expansion packers adjacent to each other. The injection liquid is simultaneously injected into the ground from the inner tube discharge port via the outer space and the outer discharge port.

Moreover, in order to solve the above-mentioned subject, according to this invention, the exterior which has a some exterior discharge port in the axial direction is provided in the ground, and within this exterior, three or more squeeze packers are provided in the other position of a longitudinal direction. And loosely inserting an inner tube having an inner tube discharge port between the adjacent expansion packers, and sending a fluid to the three or more expansion packers to expand the expansion packers to expand the two or more inner spaces between the expansion packers adjacent to each other. And inject the injection liquid from the inner tube discharge port into the ground through the inner space and the outer discharge port, and then discharge the fluid from the constriction packer to shrink the constriction packer and move the inner tube to match the inner tube discharge port with the other outer discharge port. After moving the injection stage, the expansion packer is inflated to form a space in the exterior, It characterized by simultaneously injecting ipaek in the ground.

Moreover, in order to solve the above-mentioned subject, according to this invention, the external appearance which has a some external appearance discharge port in the axial direction in the ground is provided, and in this external appearance, three or more squeeze packers in the other position of the longitudinal direction And loosely insert a plurality of inner pipes in which inner tube discharge ports are separately located between adjacent constriction packers, and send fluid to the at least three constriction packers to inflate these constriction packers to expand between the two constriction packers. It is characterized in that at least two external spaces are formed, and the injection liquid is simultaneously injected into the ground from the internal pipe discharge port via the external space and the external discharge port.

Moreover, in order to solve the above-mentioned subject, according to this invention, the exterior which has a some external appearance discharge port in the axial direction in the ground is provided, and in this exterior, three or more squeeze packers in the other position of a longitudinal direction And loosely insert a plurality of inner pipes in which inner tube discharge ports are separately located between adjacent constriction packers, and send fluid to the at least three constriction packers to inflate these constriction packers to expand between the two constriction packers. At least two external spaces are formed, and the injection liquid is simultaneously injected into the ground through the external space and the external discharge port, and the fluid is discharged from the compressed packer to shrink the compressed packer, and the plurality of internal tubes are moved to the internal pipe. Move the injection stage by matching the discharge ports with the different external discharge ports, and then expand the expansion packer to Identically repeated to form a space within, and will be characterized by simultaneously injecting the infusion liquid into the ground.

Best Mode for Carrying Out the Invention

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS It is sectional drawing for demonstrating the process of the ground injection method of this invention. 2 is a cross-sectional view of a state where the fluid is discharged from the expansion packer and the inner tube is moved to another injection stage. FIG. 3 is a cross-sectional view of a state in which the expansion packer of FIG. 2 is expanded to perform injection from another injection stage. 4 is a cross-sectional view showing a state where a plurality of inner tubes are used. FIG. 5 is a cross-sectional view of a state in which the fluid is discharged from the expansion packer of FIG. 4 and the plurality of inner tubes are moved to another injection stage. FIG. 6 is a cross-sectional view of a state in which the expansion packer of FIG. 5 is expanded to perform injection from another injection stage. FIG. It is sectional drawing of the state which provided another expansion packer in the exterior space. FIG. 8 is a cross-sectional view of a state where the fluid is discharged from the expansion packer of FIG. 7 and the plurality of inner tubes are moved to another injection stage. FIG. 9 is a cross-sectional view of a state in which the expansion packer of FIG. 8 is expanded to perform injection from another injection stage. FIG. 10 is a cross-sectional view of an injection tube actually used. 11 is a sectional view of a known injection tube.

As shown in FIG. 1, the present invention first installs an exterior 3 having a plurality of exterior discharge ports 2, 2 ... 2 at different positions in the axial direction in the ground 1. Although the installation of this external appearance 3 to the ground 1 is not shown in figure, a recess is formed in the ground 1, and the external appearance 3 is inserted in this recess. The external discharge ports 2, 2... 2 are covered with the rubber sleeve 4, respectively.

Subsequently, the inner tube 5 is loosely inserted into the outer tube 3. The inner tube 5 has three or more swelling packers 6, 6 ... 6 at intervals at different positions in the outer longitudinal direction, and an inner tube discharge port 7 consisting of injection holes between the squeezing packers 6, 6 adjacent to each other. Has

In the present invention, the fluid such as air, water, etc. is sent to the three or more expansion packers 6, 6 ... 6 through the packer flow path 8 in contact with these expansion packers 6, 6 ... 6, and the expansion packer 6 , 6… 6). As a result, two or more inward appearance spaces 9, 9... 9 are formed between the swelling packers 6 and 6 adjacent to each other, and the injection liquid is injected from the inner tube discharge port 7 into the outward appearance space 9 and the appearance. Simultaneous injection into the ground 1 via the discharge port 2 forms the freezing regions 10, 10. At this time, the ejection openings other than the external appearance ejection openings 2 existing between the constriction packers 6 and 6 adjacent to each other are occluded by the constriction packer 6.

Next, as shown in FIG. 2, the fluid is discharged from the expansion packers 6, 6. 6, and the expansion packers 6, 6. 6 are contracted to free the movement of the inner tube 5. In this way, the injection pipe is moved by moving the inner pipe 5 upward and matching the inner pipe discharge port 7 with another external discharge port 2. That is, the inner tube 5 is moved to a position where the position of the inner tube discharge port 7 coincides with the exterior discharge port 2 closed by the squeeze packer 6, 6. Similarly, the expansion packers 6, 6… 6 are expanded to form the interior spaces 9, 9… 9, and the injection solution is injected into the ground 1 at the same time as in FIG. )).

In the present invention described above, the composite injection can be performed by using the purity grout as the injection liquid of FIG. 1 and the permeable grout as the injection liquid of FIG. 3, that is, purity with short freezing time in FIG. The compound injection is possible by injecting the grout and then moving the injection stage to inject a penetrating grout having a long freezing time in FIG. 3.

4 is a cross-sectional view of an example in which a plurality of inner tubes 5 are used. As shown in FIG. 4, an exterior 3 having a plurality of exterior discharge ports 2, 2... 2 is provided in the ground 1 in the ground 1 in the same manner as in FIG. 1. A plurality of inner tubes 7, 7... 7 are loosely inserted. The plurality of inner tubes 7, 7... 7 have three or more constriction packers 6, 6. 6 at different positions in the longitudinal direction as in FIG. 1, and between adjacent constriction packers 6, 6. Each inner tube discharge port 7, 7... 7 is arranged separately. As shown in FIG. 4, the fluid is sent to three or more expansion packers 6, 6 ... 6 and expanded to form two or more in-appearance spaces 9, 9 ... 9 between the adjacent compression packers. The injection liquid is simultaneously injected from the inner tube discharge port 7 into the ground via the outer space 9 and the outer discharge port 2 to form the freezing region 10.

Subsequently, as shown in FIG. 5, the fluid is discharged and contracted from the expansion packer 6, 6 ... 6, and the inner tube 5 is moved freely. Thereafter, the plurality of inner tubes 5, 5... 5 are moved upwards, the inner tube discharge ports 7 are matched with different outer discharge ports, respectively, and the injection stage is moved. As shown in FIG. 6… 6) is expanded to form the external space 9, and the injection liquid is injected into the ground 1 at the same time, and the solidified region is polymerized to form.

FIG. 7 is a cross-sectional view of an example in which another intra-shrinkage packer 11 is provided in the outer space 9 of FIG. 4. As shown in FIG. 7, as in FIG. 1 or as in FIG. 4, an exterior 3 having a plurality of exterior discharge ports 2, 2... 2 at different positions in the axial direction is provided in the ground 1. A plurality of inner tubes 7, 7... 7 are loosely inserted into the outer tube 3. The plurality of inner tubes 7, 7... 7 have three or more squeezing packers 6, 6... 6 at different positions in the longitudinal direction, and are spaces 12, 12 partitioned by the squeezing packers 11 in space. ), One inner tube discharge port 7 is disposed. This inner tube discharge port may not necessarily be an injection port, and may be a pore.

As shown in FIG. 7, the fluid is sent to three or more compression packers 6, 6 ... 6, and the space compression packer 11, and is expanded, and it expands between the expansion packer 6 and the space expansion packer 11 in space. The injection liquid is injected from the inner tube discharge port 7 of the partitioned space 12 into the ground 1 via the partitioned space 12 and the external discharge port 2 at the same time to form the freezing region 10.

Next, as shown in FIG. 8, fluid is removed from the expansion packer 6, 6 ... 6 and the space expansion packer 11, and it contracts, and the inner tube 5 is moved freely. Thereafter, the plurality of inner tubes 5, 5, ..., 5 are moved upwards to match the inner tube discharge ports 7 with the different outer discharge ports, and then the injection stage is moved, and as shown in FIG. 6… 6) and the in-shrinkage packer 11 are expanded to form a partitioned space 12, and the same procedure is repeated to simultaneously inject the injection liquid into the ground 1 to polymerize the freezing region 10. .

4, the packer flow path 8 connected to the squeezing packer 6 is loosely inserted in the exterior 3 again, and the fluid is sent to the squeeze packer 6 via the packer flow path 8 to thereby provide the packer. The packer is contracted by expanding or draining the fluid from the swelling packer 6. In Fig. 7, the packer flow path 6, which is in contact with the inflated packer 6 and the inflated packer 11 in space, is loosely inserted, and the packed packer 6 and the packer flow path 8 are inserted through the packer flow path 8. Fluid is sent to the swelling packer 11 in the space to expand the packer, or the fluid is discharged from these packers 6 and 11 to shrink the packer.

Fig. 10 is a sectional view showing an actual injection tube used in the field in the field, and the present invention method is implemented using this injection tube. In particular, the distal end portion 16 of the inner tube 5 is connected by a bending member 13 such as a rubber tube. In addition, the injection liquid (A liquid, B liquid) is a pump P, a pressure gauge P, and a flow meter F from the injection liquid tank 15 using the injection liquid feeding apparatus of the automatic control which is not shown in figure. The liquid is fed into the injection liquid flow paths 17 and 18 of the inner tube 5, and the liquid A and the liquid B are sprayed from the respective inner tube discharge ports 7 and 7, respectively, and are discharged from the outer discharge port through the inner space 9. It is injected into the ground (1). Subsequently, the inner tube 5 is moved upward and injected into the ground 1 in the same manner as described above.

Industrial availability

According to the present invention, the use of a squeeze packer as a packer frees the squeeze of the packer, and thus, by expanding the packer at a long length, it is possible to occlude a part of the exterior discharge port and also to contract the inner tube up and down within the exterior by shrinking. In addition, by providing three or more of these swelling packers, it is possible to simultaneously inject from two or more outward ejection openings, which makes it possible to carry out a composite injection in which a pure grout or a permeable grout is polymerized. high.

The present invention has three or more constriction packers at different positions in the longitudinal direction, and loosely inserts an inner tube having an inner tube discharge port between the constriction packers to the exterior and sends the fluid to the constriction packers to expand them so as to expand between the two constriction packers. At least two external appearance spaces are formed, and the injection liquid is simultaneously injected into the ground via the internal appearance space and the external appearance discharge port from the internal tube discharge port. In addition, the fluid is discharged and contracted by the expansion packer, and in this state, the inner tube is moved to another injection stage, the expansion packer is inflated, and the injection solution is simultaneously injected in the same manner. Therefore, even if the packer is long, the inner tube can be freely moved up and down by extracting and shrinking the packer's fluid. In addition, it is possible to inject a part of the exterior discharge port from the other discharge port while clogging with the squeezing packer, and the composite injection in which the pure grout or the permeable grout is polymerized is possible.

Claims (21)

An exterior having a plurality of exterior ejection openings is provided in the ground at different positions in the axial direction, and in this exterior, there are three or more expansion packers at different positions in the longitudinal direction, and an inner tube ejection opening between adjacent expansion packers. Loosely insert the inner tube having the inner tube and send the fluid to the three or more expansion packers to expand the expansion packer to form two or more interior spaces between the adjacent expansion packers, and A ground injection method characterized by injecting into the ground via a space and appearance discharge port. An inner pipe having a plurality of external discharge outlets provided at different positions in the axial direction in the ground, having three or more expansion packers at different locations in the longitudinal direction, and having internal pipe discharge ports between the adjacent expansion packers. Is inserted loosely, and the fluid is sent to the at least three condensation packers to expand the condensation packers to form at least two in-appearance spaces between the constriction packers adjacent to each other. Simultaneously inject into the ground via the discharge port, and then drain the fluid from the expansion packer to deflate the expansion packer, move the inner tube to align the inner tube discharge port with the other external discharge port, move the injection stage, and expand the expansion packer The ground, which forms an inner space and injects the injected liquid into the ground by repeating the same. Injection method. The method according to claim 1 or 2, Ground injection method in which the inner tube discharge port is the injection port. The method according to claim 1 or 2, The inner tube has a packer flow path in contact with the expansion packer and sends fluid to the expansion packer to expand the packer, to discharge fluid from the expansion packer, or to reduce the fluid pressure in the packer to reduce the packer flow rate. Ground injection method to shrink. The method of claim 4, wherein A ground injection method wherein the fluid is gas or water. The method according to claim 1 or 2, In the case of using grout with different permeability, ground injection method of first injecting grout of poor permeability as injection liquid, and then moving the injection stage to inject grout of better permeability. An exterior having a plurality of exterior ejection openings is provided in the ground at different positions in the axial direction, and in this exterior, three or more expansion packers are provided at different positions in the longitudinal direction, and respective inner tube ejection openings are separately provided between the adjacent expansion packers. A plurality of inner tubes which are located separately are inserted loosely, and the fluid is expanded to the three or more expansion packers to expand the expansion packers, thereby forming two or more inner spaces between the adjacent expansion packers, and the injection liquid from the inner tube discharge port. The ground injection method characterized in that the injection into the ground via the interior space and the exterior discharge port. An exterior having a plurality of exterior ejection openings is provided in the ground at different positions in the axial direction, and in this exterior, three or more expansion packers are provided at different positions in the longitudinal direction, and inner tube ejection openings are separately provided between the adjacent expansion packers. A plurality of inner tubes positioned are loosely inserted, and the fluid is expanded to the three or more expansion packers to expand the expansion packers, thereby forming two or more external spaces between adjacent expansion packers, and injecting the injection liquid from the inner tube discharge port. Simultaneously inject into the ground through the interior space and exterior discharge port, and then drain the fluid from the expansion packer to shrink the expansion packer, move the plurality of inner tubes to match the inner tube discharge ports with the different exterior discharge ports, and then move the injection stage. Inflate the expansion packer to form a space in the exterior, and repeat the injection in the same way. Soil injection method characterized in that the injection. The method according to claim 7 or 8, Ground injection method in which the inner tube discharge port is the injection port. The method according to claim 7 or 8, Loosely insert a packer flow path in contact with another inflated packer in the exterior and send the fluid through the packer flow path to the inflated packer to expand the packer, or to drain the fluid from the packed packer, or A ground injection technique that shrinks this packer by reducing the fluid pressure. The method of claim 10, A ground injection method wherein the fluid is gas or water. The method according to claim 7 or 8, In the case of using grout with different permeability, ground injection method of first injecting grout of poor permeability as injection liquid, and then injecting grout of good permeability by moving the stage. The method according to claim 7 or 8, A ground injection method wherein another inner space expansion packer is provided in an outer space, and one inner tube discharge port is disposed in each space partitioned by the expansion packer in this space. The method of claim 13, A ground injection method in which an inner tube discharge port disposed in a space partitioned by a swelling packer in a space is a fine hole. The method of claim 13, In-space expansion packers are in contact with the packer flow path, which sends fluid to the in-compression expansion packer through the packer flow path to inflate the packer, to discharge fluid from the in-compression packing packer, or to reduce fluid pressure in the packer flow path. Ground injection method to shrink this packer by decompression. The method according to claim 4, 10 or 15, An inner tube is provided with a depressurization device, and is a ground injection method for depressurizing an injection liquid in an inner tube in accordance with the contraction of the expansion packer. The method according to claim 1, 2, 7, or 8, The swelling packer is an elastic impermeable cylindrical bag that expands until it adheres to the outer wall with the internal pressure of the fluid in the packer, and contracts by lowering the pressure of the fluid in the inner tube. Ground injection method that makes movement free in appearance. The method according to claim 1, 2, 7, or 8, Inner tube is ground injection method connected by flexible joint. The method according to claim 1, 2, 7, or 8, A ground injection method in which an electrical earth pressure gauge, a strain gauge, or a pore pressure gauge is installed on the pipe wall near the discharge port to measure the injection pressure during injection. The method of claim 19, The information on the injection pressure is collected on the ground by wire or wirelessly, and the ground injection method used for the control of the injection. The method according to claim 1, 2, 7, or 8, A ground injection method in which a flow rate sensor is installed at an inner pipe discharge port to measure an injection speed and an injection amount during injection.

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