JP3832457B2 - Fixing method of bundling injection capillaries in the ground - Google Patents

Description

  The present invention relates to a structure of a bundling injection capillary that is configured by bundling a plurality of thin tubes and having a fixing member attached to the tip, a fixing method in the ground, and a ground injection method. The present invention relates to a bundling injection capillary structure that can be fixed at a predetermined position in a working ground and that can be injected into a predetermined area by being prevented from being pulled out together with a casing, a fixing method in the ground, and a ground injection method.

  The ground usually has a different permeability coefficient and porosity for each layer, and therefore the ground conditions are different for each layer.Therefore, when injecting the ground, it is configured by bundling a plurality of thin tubes, and the discharge port for each layer. It is desirable to use a bundling injection capillary with

However, this kind of bundling injection tubules, especially when buried in a ground with buoyancy below the groundwater surface after drilling with a casing, floats up due to the effect of buoyancy, or is pulled out with the casing when the casing is pulled out. For this reason, it is difficult to fix the bundling injection tubule at a predetermined position in the ground, and it is impossible to inject the injection liquid into the predetermined position.
Japanese Patent Laid-Open No. 10-217828

  The problem to be solved is a bundling injection that can be fixed at a predetermined position in the ground where buoyancy works under the groundwater surface, and is prevented from being pulled out together with the casing, and can be injected at a predetermined depth. It is a thin tube, this fixing method and ground injection method.

  The present invention is configured by bundling a plurality of thin tubes each having a discharge port, which is inserted into the ground, and in which the injection material is injected into the ground from each discharge port through each of the thin tubes, A bundling injection tubule structure is characterized in that a fixing member is attached to the tip of a bundling injection tubule to fix the bundling injection tubule on the ground.

  Furthermore, the present invention is a method for fixing a bundle injection capillary tube in the ground comprising the following steps (a) to (c).

  (A) Arrange the casing in the ground while drilling holes.

(B) A bundling injection thin tube formed by bundling a plurality of thin tubes each having a discharge port and mounting a fixing member at the tip is inserted or dropped into the casing. (In case of fixing horizontally or diagonally, insert it in the casing.)
(C) Pull out only the casing and fix the bundling injection capillary tube in the ground by fixing the fixing member attached to the tip of the bundling injection capillary tube at the position in the ground as it is.

  Furthermore, the present invention binds a plurality of capillaries in a drilling hole formed in the ground, inserts a binding injection capillary having a fixing member at the tip thereof, fixes the binding injection capillary in the ground, The ground injection method is characterized by injecting an injection solution into the ground from the discharge port of the thin tube.

  Further, according to the present invention, a plurality of thin tubes are bundled in a casing installed in a ground drilling hole, a bundling injection thin tube having a fixing member attached to the tip is inserted, and then the casing is pulled out and the bundling is performed by the fixing member. The ground injection method is characterized by injecting an injection solution into the ground from the discharge port of the bundle injection capillary after fixing the injection capillary in the ground.

  The above-mentioned bundling injection tubule of the present invention, the fixing method to the ground and the ground injection method can be fixed at a predetermined position in the ground where buoyancy works under the groundwater surface and prevent being pulled out together with the casing. Allows injection at a predetermined depth.

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

    FIG. 1 is a drawing showing a bundling injection capillary structure according to the present invention. FIG. 1-A shows an example using a foldable anchor member as a fixing member, and FIG. 1-B shows a weight used as a fixing member. FIG. 1-C shows an example in which a bag body that expands by injecting a fluid is used as a fixing member.

  1 is made of a plurality of thin tubes 3, 3,... 3 each having discharge ports 2, 2,... The cover tube 4 is enclosed and bound together. At this time, the discharge ports 2, 2... 2 of the thin tubes 3, 3... 3 are arbitrary portions in the axial direction and are exposed to the outside of the cover tube 4 to be exposed.

  As described in detail later with reference to FIG. 2, the bundling injection tubule 1 according to the present invention is inserted into the casing after being drilled by the casing, and the casing is pulled out and fixed in the ground by the fixing member. After the fluid is injected into the packer bag body 6 which is inserted and then attached to an arbitrary portion of the injection capillary 1 and expanded to form a packer 7 for preventing backflow, each capillary 3, 3,. 3, the injection material is injected into the ground 5 from the discharge ports 2, 2. Alternatively, as shown in FIG. 7 to be described later, after the seal grout 15 is injected into the casing, the casing is pulled out, and the periphery of the bundle injection capillary 1 is covered with the seal grout 15 to prevent backflow of the injected solution. Thus, the bundling injection tubule 1 is inserted into the ground 5, and after fixing, the injection solution is injected into the ground 5 from the discharge ports 2, 2,... .

  As shown in FIG. 1, the feature of the present invention resides in that a fixing member 9 is attached to the distal end portion 8 of the bundling injection tubule 1 to fix the bundling injection tubule 1 in the ground. As the fixing member 9, an anchor shown in FIG. 1-A, a weight shown in FIG. 1-B, a bag body that expands by press-fitting a fluid shown in FIG. 1-C, or the like is used.

  The bundling injection tubule 1 having the above-described configuration is fixed in the ground 5 as shown in FIG. FIG. 2 shows an example in which the bundling injection tubule 1 is fixed to the ground 5 on the seabed.

  In FIG. 2, first, as shown in FIG. 2A, the ground 5 is drilled and installed while the casing 12 is rotated into the ground 5 from the carriage 11 on the ocean 10.

  Next, as shown in FIG. 2B, after the bundling injection tubule 1 shown in FIG. 1A with the anchor attached to the tip 8 as the fixing member 9 is dropped into the casing 12, the FIG. As shown, only the casing 12 is lifted. At this time, when the casing 12 is pulled up while fluid such as water, muddy water or cement / bentonite liquid is pressed into the casing 12, the rubber seal 13 is pressed downward by the pressure of the fluid, and the upper part of the bundle injection capillary 1. To prevent movement. When the casing 12 is pulled out in this state, as shown in FIG. 2C, since the bundle injection capillary 1 is prevented from moving upward, only the casing 12 is pulled out and the anchor pops out of the casing 12 and opens. , Acting as a fixing member 9.

  It is also possible to drop the binding injection capillary 1 into the casing 12 while pressing the fluid into at least one of the binding injection capillary 1 and pull the casing 12 to fix the binding injection capillary 1 in the ground 5.

  In this way, after pulling out only the casing 12 and fixing the bundling injection tubule 1 in the ground 5 by the fixing member 9, as shown in FIG. 2D, the bundling injection tubule 1 is mounted at an arbitrary position. Then, a fluid is introduced into the packer bag body 6 and expanded to form a backflow prevention packer 7. Thereafter, as shown in FIG. 2-E, the injection material is injected from the discharge port 2 into the ground 5 through the thin tube 3, and the ground 5 is injected by the injection liquid as shown by the oblique lines in FIGS. 2-E and 2-F. Are consolidated to form a consolidated body 14.

  The packer 7 may be omitted depending on the case. In the case where the drilling wall collapses as the casing is pulled out and the periphery of the bundle injection capillary is filled with earth and sand, it may be injected as it is from each discharge port of the bundle injection capillary. Alternatively, before inserting the bundling injection capillary into the casing, the seal grout may be injected into the casing, after which the bundling injection tubule may be inserted, and only the casing may be pulled out while fixing the bundling injection capillary with the fixing member. . The seal grout may be injected while the bundling injection capillary is inserted into the casing, or may be injected into the casing after the bundling injection capillary is inserted. Of course, as shown in FIG. 2-D, both the packer 7 and the seal grout 15 can be used.

  In the above-described fixing method of the bundling injection capillaries to the ground, after the seal grout 15 is injected into the casing 12, the bundling injection capillaries 1 having the fixing member 9 attached to the tip are dropped into the casing 12, and only the casing 12 is pulled out. The bundling injection capillary 1 may be fixed to the ground 5, and after dropping the bundling injection capillary into the casing 12, only the casing 12 is withdrawn while injecting the seal grout 15 therein, and the bundling injection capillary 1 is grounded. 5 may be fixed.

  The above-described seal grout 15 surrounds the bundle injection capillary 1 as shown in FIG. 2-D, and the injection material splits the seal grout 15 at the time of injection, as shown in FIGS. 2-E and 2-F. It is injected into the ground 5 to form a consolidated body 14.

  When the one shown in FIG. 1-A is used as the bundle injection capillary 1, the anchor as the fixing member 9 is folded in the casing 12 before the casing 12 is pulled out, as shown in FIG. After the casing 12 is pulled out, as shown in FIG. 3B, the anchor is opened and acts as the fixing member 9. As shown in FIG. 2F, the bundling injection tubule 1 may be pulled up while leaving only the anchor 9 in the ground 5, or may be terminated and buried in the state of FIG.

  When the one shown in FIG. 1-B is used as the binding injection capillary 1, the weight as the fixing member 9 is in the casing 12, as shown in FIG. 4-A, before the casing 12 is pulled out. After pulling out 12, the weight 9 acts as the fixing member 9 in the ground 5 as shown in FIG. Although the binding injection capillary 1 is not shown, it may be lifted while leaving only the weight in the ground as in FIG. 2-F, and may be terminated and buried in the same state as in FIG. 2-E.

  When the one shown in FIG. 1-C is used as the bundling injection thin tube 1, before the casing 12 is pulled out, as shown in FIG. 5-A, the bag body as the fixing member 9 is not filled with fluid. Although it is in a contracted state, when the casing 12 is pulled out, fluid is press-fitted into the bag body and expands as shown in FIG. 5B, and acts as the fixing member 9 in the ground 5. After the injection solution has been injected from the discharge ports 2, 2,... 2 of the binding injection capillary 1, the binding injection capillary 1 may be buried or pulled out as shown in FIG. The bundling injection tube 1 is difficult to pull out when the fluid in the bag 6 is a caking fluid, but if the seam portion above the packer 7 is formed weakly, the bundling injection of the portion above the sea bottom is injected. Capillary tube can be pulled out. When the fluid in the bag body is a non-consolidating fluid, the bundle injection capillary 1 may be pulled up together with the bag body in a state where the press-fitting of the fluid is stopped and the bag body is contracted. In this case as well, the process may be terminated in the same state as in FIG. 2-E, and the bundling injection tubule 1 may be buried in the ground.

  In addition, when the ground is soft at the time of fixing to the ground, the bundling injection tubule according to the present invention inserts a hard core material inside the bundling injection tubule or directly press-fits into the ground together with the rod-shaped body. You can also. In this case, the anchor member shown in FIG. 1A is in a contracted state as shown in FIG. 3-A during the press-fitting, for example, when the anchor shown in FIG. In this way, the contraction is released and opens, and it acts as a fixing member. The same applies to the fixing member at the tip portion shown in FIG. 1-B. Further, even when the fixing member at the tip portion is a bag body shown in FIG. 1-C, after press-fitting, a fluid is injected into the bag body and expanded to exhibit an action as a fixing member.

  In FIG. 6, when injecting the injection liquid into the ground, the bundling injection thin tube 1 configured as described above is inserted into the casing 12 in the drilling hole 17 formed in the ground 5, and the casing 12 is pulled out. In this example, the fluid is injected into the packer bag body 16 from the discharge port 2 after being fixed inside, and the packer 19 is formed. After forming the packer 19, an injection solution is injected into the ground 5 from the discharge port 2 of the bundle injection capillary 1 in the gap 25 between the upper and lower packers.

  In FIG. 6, one or a plurality of packer bags 16 are attached to the bundling injection tubule 1 at an interval to form a bundling injection tubule 1, which is inserted into a hole 17 in the ground 5 to inject a seal grout. It settles in the ground 5 without doing. Next, in injecting the injection liquid into the ground 5, the packer bag body 16 is expanded with a fluid and pressed against the wall surface 18 of the hole 17 to form the packer 19, and then the discharge ports 2, 2. .. The injection solution is injected from 2 through the gap 25 through the wall 18 into the ground 5. Of course, the seal grout may be filled between predetermined packers depending on the ground conditions.

  In the above description, when a non-consolidating fluid such as water, air, or an inert gas is used as the fluid, the packer bag body 16 contracts if the fluid pressure is lowered. Can be withdrawn and collected after injection is complete.

  7 and 8 show examples in which the injection management is performed using the centralized management system. In either example, the injection liquid is injected and managed by the centralized management system from the injection chemical liquid tank 20, and each of the narrow tubes 3, 3,... Are injected into the ground 5 through the discharge ports 2, 2... 2 of the bundling injection tubule 1 fixed in the ground 5. 7 and 8, both of the bundle injection capillaries 1 are covered with a seal grout 15, and the injection liquid from the discharge ports 2, 2,... 2 is split into the seal 5 and injected into the ground 5. The Hereinafter, the injection system of FIGS. 7 and 8 will be described in detail.

  FIG. 7 is an explanatory diagram of a specific example of a ground injection system that simultaneously injects a plurality of thin tubes 3, 3... 3 through a distributor and a branch pipe from one injection pump. 27, an injection liquid distribution unit 28, an injection unit 29, and a liquid delivery system 30.

As shown in FIG. 7, the injection liquid pressurizing unit 27 pressurizes the injection liquid from the injection chemical liquid tank 20 by the injection pump 21, and sends it as a pressurized injection liquid to the injection liquid distribution unit 28 via the liquid supply system 30. Liquid. The infusion pump 21 receives an instruction from the infusion monitoring panel 31 of the control unit 26 and pressurizes the infusate to a desired pressure.

  The injection liquid distribution unit 28 includes a plurality of branch pipes 32, 32. Each of these branch pipes 32, 32... 32 has a connecting portion 33 connected to the thin tubes 3, 3. The connecting portion 33 connects the branch pipe 32 to the other narrow tubes 3, 3... When the predetermined injection amount has been injected through the predetermined thin tubes 3, 3. .. can be switched to 3.

  As shown in FIG. 7, the branch pipes 32, 32... 32 are respectively extended from the distribution device 34 and are connected to the narrow pipe 3 by the connecting portion 30 at the tip. And the pressurization injection liquid from the pressurization part 27 is distributed to each branch pipe 32,32 ... 32 via the distribution apparatus 34, and is sent to the thin tubes 3,3 ... 3. Further, in FIG. 7, if the total amount of the branch flow meters 35, 35... 35 is measured, the flow rate of the liquid flow meter 36 can be grasped, and in this case, the liquid flow meter 36 is not necessarily required. .

  In FIG. 7, branch pipes 32, 32... 32 are equipped with branch valves 37, 37... 37, respectively, and branch flow meters 35, 35. A total of 38, 38. The branch pipes 32, 32... 32 send the pressurized injection solution from the pressurizing unit 27 to the thin tubes 3, 3. The branch flow meters 35, 35... 35 can be provided upstream of the branch valves 37, 37. Further, by providing the branch valves 37, 37... 37 with a stop valve function, the liquid supply valve 39 is not necessarily required.

  A liquid feeding flow system 36 and / or a liquid feeding pressure gauge 40 are provided in the liquid feeding system 30 for the pressurized injection solution from the injection pressure unit 27 to the injection solution distribution unit 28. Further, a liquid supply valve 39 is provided in the liquid supply system 30 downstream of the liquid supply flow meter 36 and / or the liquid supply pressure gauge 40 or upstream of the branch pipe 32.

  The control unit 26 is mainly composed of an injection monitoring board 31, and in addition to this, an operation panel 41, an injection recording board 42, and a data input device 43 are incorporated, or these are connected to the control unit 26 by a signal circuit from outside the control unit 26. Connected and configured. The control unit 26 is connected to one or more of the liquid feeding flow meter 36, the liquid feeding pressure meter 40, the branch flow meter 35 and the branch pressure gauge 38, and the injection pressurizing unit 27 by signal circuits. , Based on the information from the liquid flow meter 36 and / or the liquid pressure gauge 40 or the information from the branch pressure gauges 38, 38... 38 and / or the branch flow meters 35, 35. The pressure unit 27 is controlled.

  Accordingly, the injection solution can be simultaneously selected from a single liquid feeding system to a plurality of capillaries 3, 3... 3 with a predetermined set flow rate or set pressure of the pressurized injection solution or with a flow rate or pressure within a limit range. In addition, or in addition, it automatically feeds and injects liquid. Moreover, a predetermined discharge amount can be obtained corresponding to a predetermined pressure of the pressurized injection liquid and an area of the flow path of the throttle part or the branch valve, and as a result, a wide range of ground can be improved quickly and reliably.

  Further, the branch valves 37, 37... 37 can be operated manually, but can also be operated by the control unit 26 by a signal circuit. Then, based on the information from the above-described liquid flow meter 36 and / or liquid pressure gauge 40, or based on the information from the branch flow meter 35 and / or the branch pressure gauge 38, the branch valves 37, 37. 37, on / off control and throttling control, as shown in FIG. 7, switching control of the infusate pressurizing unit 27 to the return lines 44, 44... Switching control to the road is performed by the branch valves 37, 37. In addition, the connection of the branch pipes 32, 32... 32 to the thin tubes 3, 3.

  In FIG. 7, the return pipe 44 is provided directly on the branch valves 37, 37. Then, when a predetermined injection amount from each branch pipe 32, 32... 32 is completed, the injection liquid is returned to the injection chemical tank 20 through this return pipe 44, or the branch pipes 32, 32. Is connected to the other narrow tubes 3, 3... 3 without adjusting the liquid supply flow rate by adjusting the inverter, all the branch pipes 32, 32. The infusion can continue until the infusion is complete. Although the water washing pipeline is not shown, the branch pipe, the distributor, etc. are washed with water by switching the branch valves 37, 37.

  Furthermore, the liquid supply valve 39 provided in the liquid supply system 30 can be manually operated, but can also be operated by being connected to the control unit 26 by a signal circuit. And like the above-mentioned, based on the information from the liquid feeding flow meter 36 and / or the liquid feeding pressure gauge 40, or the branch flow meters 35, 35... 35 and / or the branch pressure meters 38, 38. On / off control of the liquid supply valve 39, aperture control of the opening degree of the liquid supply valve 39, and the like can be performed based on the information from. An electromagnetic valve, an air valve, a hydraulic valve, or the like is used as the liquid supply bubble or the branch valve.

  Further, branch flow meters 35, 35... 35 and / or branch pressure gauges 38, 38... 38 attached to the branch pipes 32, 32... 32 are also connected to the control unit 26 by signal circuits. The The same control as described above is possible based on information from the branch flow meter 35 and / or the branch pressure gauge 38 or based on information from the liquid flow meter 36 and / or the liquid pressure gauge 40. is there.

  The above-described branch flowmeters 35, 35... 35 can use arbitrary flowmeters such as a rotary flowmeter or an electromagnetic flowmeter, and an electric signal output in pulses is input to the control unit 26 and counted. . Further, the inverter is activated by an instruction from the control unit 26 to the injection liquid pressurizing unit 27 based on information from the liquid flow meter 36 and / or the liquid pressure gauge 40 and the branch flow meter 35 and / or the branch pressure gauge 38. The flow rate of the branch pipe 32 is controlled by adjusting the number of rotations of the injection pump 21 and controlling the flow rate fo and injection pressure Po per minute.

  FIG. 7 shows an example in which an injection liquid return system 45 is provided in the injection pressurizing unit 27. A liquid pressure gauge 40 and an injection liquid return device 46 are provided at an arbitrary position of the pressurized injection liquid supply system 30 from the injection liquid pressurizing section 27 to the branch valve 37 of the injection liquid distribution section 28 or a distribution device 34, In addition, the control unit 26 is provided with a flow pressure control device 47. The liquid pressure gauge 40 and / or the liquid flow meter 36 are connected to the flow pressure controller 47, and the injection liquid return device 46 is also connected to the flow pressure controller 47.

  The infusion solution return device 46 divides the infusion solution in the solution feeding system 30 from the solution feeding system 30 to the return line 44 based on information from the solution feeding pressure gauge 40 and / or the solution feeding flow meter 36. By returning a part to the infusion chemical tank 20, the liquid pressure of the liquid feeding system 30 is maintained at a desired pressure, whereby the branch pipes 32, 32. ..Adjusting the discharge amount of the injection solution fed to 3 to a desired amount, and even if any of the plurality of branch pipes 32, 32. Therefore, while maintaining the predetermined pressure, the discharge amount of each of the remaining branch pipes 32, 32,... 32 can be held at a predetermined amount and injected. The same discharge amount can be automatically obtained up to the book.

  FIG. 8 is an explanatory diagram of a specific example of a ground injection system that uses a unit pump 21A as an injection pump and simultaneously injects a plurality of unit pumps 21A, 21A,. . In FIG. 8, the infusion chemical tank 20 is connected from the unit pumps 21A, 21A,... 21A to the thin tubes 3, 3,. Then, the injection liquid is sent to the thin tubes 3, 3... 3 by the operation of the unit pumps 21A, 21A. A pressure gauge 22 and a flow meter 23 are arranged in each thin tube 3, 3. These are connected to a controller 24 having an injection monitoring panel (not shown), and each unit pump 21A, 21A... 21A is also connected to the controller 24, and each injection from a large number of unit pumps 21A, 21A. The flow rate and pressure of the liquid discharge amount are collectively monitored by a set of controllers 24, the injection operation is controlled, and the whole operates as a set of injection systems. In addition, a large number of unit pumps may be driven by a single driving body, and the injection solution may be simultaneously fed to the thin tubes 3, 3,...

  When a bundling injection tubule is inserted into the ground, and the injection solution is injected into the ground through this tubule and the ground is consolidated, it can be fixed at a predetermined position in the ground where buoyancy works under the groundwater surface, Provided is a bundle injection capillary having a structure that is not pulled out together when a casing is pulled out. In addition, such bundling injection capillaries are fixed at a predetermined depth in the ground and can be injected at a predetermined depth. In addition to injection into the seabed ground, ground injection below the groundwater surface above the ground or tunnel It is also applied to slanted upward injection or horizontal injection, such as liquefaction prevention work by curved boring under the building and curved boring under the building.

It is a side view of a bundling injection capillary using a foldable anchor as a fixing member. It is a side view of a bundling injection tubule using a weight as a fixing member. It is a side view of a bundling injection thin tube using a bag body that expands by injection of fluid as a fixing member. It is sectional drawing which embed | buried the casing in the ground of the ocean. FIG. 2B is a cross-sectional view of the casing in FIG. 2-A when the bundling injection tubule of FIG. 1-A with an anchor attached to the tip as a fixing member is dropped. It is sectional drawing of the state which pulled up the casing of FIG. 2-B and protruded the anchor. It is sectional drawing of the state which pulled up the casing of FIG. 2-B, filled the sealing grout into the hole, and expanded the packer bag, and formed the packer. It is sectional drawing of the state which inject | poured injection liquid in the ground from the discharge outlet and formed the solidified body in the ground. FIG. 2E is a cross-sectional view of a state in which, after further injecting the injection solution, only the anchor at the tip is left in the ground and the bundle injection capillary tube is pulled out. It is a fragmentary sectional view in the state where the anchor of the bundling injection capillary tube tip was folded in the casing. In FIG. 3-A, it is the fragmentary sectional view of the state which pulled out the casing and jumped out the anchor into the ground. It is a fragmentary sectional view in the state where the weight of the bundling injection capillary tube tip is stored in the casing. In FIG. 4-A, it is a fragmentary sectional view of the state which pulled out the casing and exposed the weight in the ground. It is a fragmentary sectional view in the state where the bag body of a bundling injection thin tube tip part contracted. In FIG. 5-A, it is a fragmentary sectional view of the state which introduced and expanded the fluid to the bag. It is a fragmentary sectional view showing the use condition of the actual bundling injection tubule in which a plurality of packers are formed at intervals in the bundling injection tubule and the injection liquid is injected into the ground from the gaps between the packers. It is explanatory drawing of one specific example of the ground injection | pouring system injected simultaneously through a some thin tube by a centralized management system. It is explanatory drawing of the other specific example of the ground injection | pouring system injected simultaneously through a some thin tube by a centralized management system.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Bundling injection thin tube 2 Discharge port 3 Thin tube 4 Cover tube 5 Ground 6 Packer bag body 7 Packer 8 Tip 9 Fixing member 12 Casing 13 Rubber seal 14 Solidified body 15 Seal grout 16 Packer bag body 17 Hole 18 Wall 18 Packer 20 Injection chemical liquid tank 21 Injection pump 21A Unit pump 25 Clearance 26 Control part 27 Pressurization part 28 Injection liquid distribution part 29 Injection part 30 Liquid supply system 31 Injection monitoring panel 32 Branch pipe 33 Connection part 34 Distribution apparatus 35 Branch flow meter 36 Fluid flow meter 37 Branch valve 38 Branch pressure gauge 39 Fluid feed valve 40 Fluid pressure gauge 41 Operation panel 42 Injection recording panel 43 Data input device 44 Return line 45 Injection solution return system 46 Injection solution return device 47 Flow pressure control device

Claims (7)

A method for fixing a bundling injection capillary tube in the ground comprising the following steps (a) to (c).
  (A) Arrange the casing in the ground while drilling holes.
  (B) A bundling injection tubule formed by bundling a plurality of tubules having discharge ports and mounting a fixing member at the tip is inserted into the casing.
(C) Pull out only the casing and fix the bundling injection capillary tube in the ground by fixing the fixing member attached to the tip of the bundling injection capillary tube at the position in the ground as it is. 2. The fixing method according to claim 1, wherein the fixing member is an anchor member, and only the casing is pulled out and the anchor is fixed at a position in the ground as it is. 2. The fixing method according to claim 1, wherein the fixing member is a weight, and the weight is fixed at a position in the ground by pulling out only the casing. The fixing member according to claim 1, wherein the fixing member is a bag body that expands by injecting a fluid, and only the casing is pulled out, and the fluid is press-fitted into the bag body to be expanded, and the expanded bag body is fixed at a position in the ground. The fixing method according to claim 1. 2. The fixing method according to claim 1, wherein a seal grout is injected into the casing, and the bundling injection capillaries are covered with the seal grout and fixed in the ground. 2. The fixing method according to claim 1, wherein the bundling injection capillary is inserted into a casing, and the casing is pulled out while fluid is pressed into at least one of the bundling injection capillaries to fix the binding injection capillary in the ground. In Claim 1, the packer bag body which expand | swells by injection | pouring of a fluid is mounted | worn in the arbitrary places of a binding injection | pouring capillary tube, fluid is injected in a bag body prior to injection | pouring of an injection material, and a binding injection | pouring capillary tube The fixing method according to claim 1, wherein a packer is formed between the drilling walls.

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