JP5409229B2 - Consolidation material injection tube and method for constructing solid material injection tube - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a consolidation material injection pipe and a method for constructing a consolidation material injection pipe, and in particular, in a natural ground reinforcement pipe and a natural ground reinforcement pipe for stabilizing natural ground in excavation work of a tunnel such as a mountain tunnel. TECHNICAL FIELD The present invention relates to a consolidation material injection pipe for injecting a consolidation material into a natural ground around the sea and a method for constructing the consolidation material injection pipe.

  In excavation work for tunnels such as mountain tunnels, FRP pipes (fiber reinforced plastic pipes) and steel pipes made of steel pipes are placed on the ground such as mirror surface reinforcement work, receiving work and leg reinforcement work. Insert a consolidation agent injection pipe made of flexible material into the pile reinforcement pipe, and inject the consolidation agent into the natural ground reinforcement pipe and surrounding natural ground via the consolidation agent injection pipe. Then, after stabilizing the natural ground, excavate the natural ground with heavy machinery, cut the natural ground reinforcement pipe and the binder injection pipe with the excavation, and remove it together with the excavated earth and sand (For example, refer to Patent Document 1).

JP 2002-194985 A

  By the way, when the consolidation material injection tube made of the flexible material as described above is used for the injection of the consolidation material, when excavating the natural ground by heavy machinery, the consolidation material injection tube should be cut to have flexibility. However, the binder injection pipe may remain in the ground, and it may take time to remove it and affect the construction of the next process.

  On the other hand, in order to cope with the above problems, it is conceivable to form the consolidated material injection tube with a hard material that can be cut by a heavy machine, but when the consolidated material injection tube is formed with a hard material, the consolidated material Depending on the length of the injection pipe, it takes a lot of work to carry it into the site and to install it in the ground reinforcement pipe.

  The present invention has been made in view of the above-described conventional problems. When excavating a natural ground, the present invention can be cut together with a natural ground reinforcing pipe placed on the natural ground, along with the excavated earth and sand. An object of the present invention is to provide a consolidating material injection pipe and a consolidating material injection pipe construction method that can be removed and easily carried into the site and installed in the ground reinforcement pipe.

In order to solve the above problems, the present invention employs the following means.
That is, the present invention is a consolidation material injection pipe for injecting a consolidation material into a natural ground reinforcement pipe, and a plurality of short pipes made of a hard material that can be cut together with the natural ground reinforcement pipe via pipe joints. One end is inserted into the ground reinforcement pipe, the other end is formed to a length that is drawn out of the ground reinforcement pipe, and the pipe joint is connected to two short joints. A male member attached to the end of one short tube of the tubes, and a female member attached to the end of the other short tube and interconnected with the male member,
Sockets covering the connecting portion between the male member and the one short tube and the connecting portion between the female member and the other short tube are respectively bonded to the one short tube and the other short tube. It is characterized by being.

  According to the solidified material injection pipe of the present invention, since it is formed of a hard material that can be cut together with the natural ground reinforcement pipe, when excavating the natural ground, it is cut together with the natural ground reinforcement pipe and together with the earth and sand. Can be removed. Moreover, since the some short pipe is connected via the pipe joint, carrying in to a spot and construction can be performed easily.

Further, the male member of the pipe joint of one short pipe and the female member of the pipe joint of the other short pipe of the two short pipes are connected to each other, and such connection work is performed on a plurality of short pipes. By repeating the process, it is possible to insert the consolidation material injection pipe having a predetermined length into the natural ground reinforcement pipe.

  Further, in the present invention, each short tube may be provided with injection holes penetrating inside and outside at a plurality of locations, and the end opening of the short tube on the distal end side may be closed by a cap.

  According to the consolidated material injection tube of the present invention, by supplying the consolidated material into the consolidated material injection tube, the consolidated material enters the ground reinforcement pipe through each injection hole of the consolidated material injection tube. It is injected and injected into the natural ground around the natural ground reinforcing pipe through the natural ground reinforcing pipe.

  Furthermore, in the present invention, a flexible tube may be connected to the end opening of the short tube on the rear end side, and may be connected to a consolidated material supply source via the flexible tube.

  According to the consolidated material injection tube of the present invention, the consolidated material is supplied from the consolidated material supply source into the consolidated material injection tube through the flexible tube, and into the natural ground reinforcement tube through the consolidated material injection tube. The consolidated material is injected, and the consolidated material is injected into the surrounding natural ground via the natural ground reinforcing pipe. In this case, since the flexible pipe is connected to a portion drawn out of the ground reinforcement pipe of the consolidation material injection pipe, the flexible flexible pipe is a consolidation material when excavating the natural ground. There is no effect on the cutting operation of the injection pipe, and the solid material injection pipe can be cut together with the natural ground reinforcement pipe and removed together with the earth and sand.

  Further, in the present invention, an open / close valve may be provided between the flexible tube and the short tube on the rear end side to open / close between them.

  According to the consolidated material injection pipe of the present invention, the open / close valve is opened and closed to supply the consolidated material into the consolidated material injection pipe or to stop the supply.

Further, according to the present invention, when cutting a natural ground reinforcement pipe along with excavation of a natural ground, a plurality of short pipes made of a material that can be cut together with the natural ground reinforcement pipe are sequentially connected via a pipe joint. The solid material injection pipe is inserted into the ground reinforcement pipe while one end is inserted into the ground reinforcement pipe and the other end is drawn out of the ground reinforcement pipe. The pipe joint is attached to an end of one short pipe of two short pipes connected to each other, and attached to an end of the other short pipe, and the male member A socket connected to the male member and the one short tube, and a socket that covers the connecting portion between the female member and the other short tube, respectively. And the other short tube .

  According to the method for constructing a solid material injection pipe of the present invention, a plurality of short pipes are sequentially connected to each other through pipe joints and inserted into a natural ground reinforcement pipe, thereby a predetermined length of the solid material injection pipe. Can be inserted into the natural ground reinforcement pipe. Then, along with excavation of the natural ground, this consolidated material injection pipe can be cut together with the natural ground reinforcing pipe and removed together with the earth and sand.

  As described above, according to the consolidation material injection pipe and the consolidation material injection pipe construction method of the present invention, when excavating a natural ground, the solid material injection pipe is cut together with the natural ground reinforcement pipe. Can be removed with earth and sand. Therefore, as in the case where the consolidation material injection tube is formed of a flexible material, the consolidation material injection tube remains in the ground, and it takes time to remove it, or it affects the next process. There is no. In addition, since the binder injection pipe is formed to a predetermined length by connecting a plurality of short pipes via pipe joints, it can be easily carried into the site and installed in the ground reinforcement pipe. It can be carried out.

It is the schematic which showed one Embodiment of the consolidated material injection pipe by this invention. It is the schematic of the pipe joint of a solidification material injection pipe.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 and 2 show an embodiment of a consolidated material injection pipe according to the present invention. The consolidated material injection pipe 1 is inserted into a natural ground reinforcement pipe 15 (for example, an FRP pipe, a steel pipe, etc.) placed in the natural ground 20 to be used in the natural ground reinforcement pipe 15 and the natural ground reinforcement. It is effective for injecting a consolidation material (for example, cement-based consolidation material, urethane-based consolidation material, etc.) into the natural ground 20 around the tube 15, and a plurality of short tubes 2, 3, 4 are It is formed in a predetermined length by sequentially connecting through the pipe joint 7.

Each short pipe 2, 3 and 4 is a hard material that can be removed together with the excavated earth and sand by cutting with the natural ground reinforcing pipe 15 placed in the natural ground 20 when excavating the natural ground 20 with heavy machinery. In this embodiment, a commercially available hard vinyl chloride pipe (JIS K6741) having a length of 4 m is used for each short pipe 2, 3, 4. 4 is sequentially connected through a pipe joint 7 described later, thereby forming a consolidated material injection pipe 1 having a predetermined length.
The short pipes 2, 3, and 4 are not limited to hard vinyl chloride pipes, but may be made of a material (synthetic resin, metal, glass fiber, or the like) that can be cut together with the natural ground reinforcing pipe 15 by a heavy machine. .

  Each short tube 2, 3, 4 is provided with a plurality of injection holes 5 penetrating inside and outside, and when the consolidated material is injected into the consolidated material injection tube 1, each short tube 2, 3, 4 is provided. The solidified material is injected into the natural ground reinforcement pipe 15 through the injection holes 5. The solidified material injected into the natural ground reinforcement pipe 15 is a natural ground 20 around the natural ground reinforcement pipe 15 via a plurality of injection holes (not shown) penetrating the inside and outside of the natural ground reinforcement pipe 15. Injected into.

  The pipe joint 7 includes a male member 8 and a female member 9 connected to the male member 8, and is connected to one of the two short pipes 2, 3, 4 connected to each other. A male member 8 is attached to the end, and a female member 9 is attached to the connecting end of the other short pipe. By connecting the male member 8 and the female member 9 to each other, one short pipe and the other short pipe are connected to each other via the pipe joint 7.

  As the pipe joint 7, for example, various couplings composed of a combination of a metal or plastic plug 8 a that is a male member 8 and a socket 9 a that is a female member 9 can be used. For example, a coupler (registered trademark) manufactured by Nitto Kohki Co., Ltd. is effective as the coupling.

  In the present embodiment, the front end opening 2a is closed with a hard vinyl chloride cap 6, the front end short tube 2 having a socket 9a attached to the rear end opening 2b, and the plug 8a attached to the front end opening 3a. There are three types of short tubes: an intermediate short tube 3 having a socket 9a attached to the opening 3b, and a rear short tube 4 having a plug 8a attached to the front end opening 4a and the rear end opening 4b remaining open. Used. These three types of short tubes 2, 3, 4 are sequentially connected in that order from the tip side to constitute a consolidated material injection tube 1 having a predetermined length.

  In the present embodiment, the tip of the short tube for tip 2 is positioned in the vicinity of the tip of the natural ground reinforcing tube 15, and the rear end of the short tube for rear end 4 is positioned outside the natural mountain reinforcing tube 15. The length of the consolidated material injection tube 1 is set. Specifically, the rear end socket 9a of the short end tube 2 and the plug 8b at the front end of the intermediate short tube 3 are connected to each other, and the rear end socket 9a of the intermediate short tube 3 and the rear end short tube 3 are connected. By connecting the plug 8b at the tip of the tube 4 to each other, the consolidated material injection tube 1 is set to a predetermined length.

  In this case, one or more intermediate short tubes 3 are connected to the front short tube 2 according to the length of the natural ground reinforcing tube 15, and the rear short tube 4 is connected to the intermediate short tube 3. Are connected to form the consolidated material injection tube 1 having a predetermined length. Depending on the length of the natural ground reinforcing pipe 1, the rear short pipe 4 may be directly connected to the front short pipe 2 without using the intermediate short pipe 3.

  The socket 9a of the pipe joint 7 may be directly attached to the rear end opening 2b of the short end tube 2 and the rear end opening 3b of the intermediate short tube 3, or the rear end opening 2b of the short end tube 2 The socket 10 made of hard vinyl chloride is attached to the rear end opening 3b of the intermediate short pipe 3 with an adhesive, and the male threaded portion 9b of the socket 9a of the pipe joint 7 is screwed to the female threaded portion (not shown) of the socket 10. By combining them, the rear end opening 2b of the short tube for tip 2 and the rear end opening 3b of the intermediate short tube 3 may be attached.

  Further, the plug 8a of the pipe joint 7 may be directly attached to the tip opening 3a of the intermediate short tube 3 and the tip opening 4a of the rear short tube 4, or the tip opening 3a of the intermediate short tube 3; And the socket 10 made of hard vinyl chloride is attached to the front end opening 4a of the short pipe 4 for the rear end with an adhesive, and the male threaded portion 8b of the plug 8a of the pipe joint 7 is screwed into the female threaded portion (not shown) of the socket 10. By doing so, you may attach to the front-end opening 3a of the short tube 3 for intermediate | middle, and the front-end opening 4a of the short tube 4 for back ends.

  In this embodiment, the socket 9a is attached to the rear end opening 2b of the front end short tube 2, and the plug 8a is attached to the front end opening 4a of the rear end short tube 4. A plug 8 a is attached to the end opening 2 b, a socket 9 a is attached to the tip opening 3 a of the intermediate short tube 3, and the intermediate short tube 3 is reversed between the front short tube 2 and the rear short tube 4. It is also possible to configure the consolidated material injection pipe 1 having a predetermined length by arranging the above.

  The consolidated material injection pipe 1 has a plug member made of a synthetic resin or a synthetic rubber in which one end is inserted into the natural ground reinforcement pipe 15 and the other end is tightly plugged to the open end portion 16 of the natural ground reinforcement pipe 15. 13 is pulled out of the natural ground reinforcement pipe 15 and fixed to the natural ground reinforcement pipe 15 by the plug member 13.

  In the present embodiment, three of the first consolidated material injection tube 1a, the second consolidated material injection tube 1b, and the third consolidated material injection tube 1c having different lengths are provided in the natural ground reinforcement tube 15. Has been inserted. The first consolidated material injection tube 1a is composed of a short tube 2 for the front end, two intermediate short tubes 3, 3 and a short tube 4 for the rear end, and the second consolidated material injection tube 1b is used for the front end. The short tube 2 is composed of an intermediate short tube 3 and a rear end short tube 4, and the third consolidated material injection tube 1c is composed of a front end short tube 2 and a rear end short tube 4. ing.

  The rear end opening 4b of the rear end short tube 4 of the first consolidation material injection tube 1a, the rear end opening 4b of the rear end short tube 4 of the second consolidation material injection tube 1b, and the third consolidation material injection tube. As shown in FIG. 1, an opening / closing valve 11 is attached to the rear end opening 4b of the rear end short pipe 4 of 1c, and each opening / closing valve 11 is connected to a solid material supply source (see FIG. (Not shown), and the solidified material is supplied from the fixed material supply source to the respective solidified material injection pipes 1a, 1b, and 1c via the flexible tubes 12 and the open / close valves 11.

  Then, as described above, the first consolidated material injection formed by sequentially connecting a plurality of short pipes (the short pipe 2 for the front end, the short pipe 3 for the intermediate part, and the short pipe 4 for the rear end) via the pipe joint 7. The tube 1a, the second consolidated material injection tube 1b, and the third consolidated material injection tube 1c are inserted into the natural ground reinforcement tube 15, and the plug member 13 is fitted into the open end 16 of the natural soil reinforcement tube 15. The rear end short pipes 4 of the respective binder injection pipes 1a, 1b, 1c are pulled out of the ground reinforcement pipe 15 through the plug member 13, and the rear end of each rear end short pipe 4 Open / close valves 11 are respectively attached to the open / close valves 11, and the open / close valves 11 are connected to the binder supply source via the flexible pipes 12.

  Thus, after installing the 1st solidification material injection pipe 1a, the 2nd solidification material injection pipe 1b, and the 3rd solidification material injection pipe 1c, each flexible tube 12, each opening and closing from a solidification material supply source By supplying the consolidated material to the respective consolidated material injection pipes 1a, 1b, and 1c through the valve 11, the respective injection holes of the respective short tubes 2, 3, and 4 of the consolidated material injection tubes 1a, 1b, and 1c. The solidified material is injected into the natural ground reinforcement pipe 15 through 5, and the solidified material is injected into the natural ground 20 around the natural ground reinforcement pipe 15 through the injection holes of the natural ground reinforcement pipe 15. The

  After injecting the consolidated material, the consolidated material is solidified, and then the ground 20 is excavated by a heavy machine to cut and excavate the consolidated material injection tubes 1a, 1b, and 1c together with the natural mountain reinforcing pipe 15. The ground pile reinforcing pipe 15 and the cut pieces of the binder injection pipes 1a, 1b, and 1c are removed together with the earth and sand.

  In the consolidated material injection pipe 1 according to the present embodiment configured as described above, since it is formed of a hard material that can be cut together with the steel pipe 15 for reinforcing the natural ground, when excavating the natural ground with heavy machinery, It can be cut together with the mountain reinforcing pipe 15 and can be removed together with the excavated earth and sand. Therefore, as in the case where the consolidation material injection tube is formed of a flexible material, the consolidation material injection tube remains in the ground and takes time to remove it, or the next process is affected. There is nothing.

  Further, since the plurality of short pipes 2, 3, and 4 are sequentially connected to each other via the pipe joint 7, the solid material injection pipe 1 having a predetermined length is formed. Can be easily carried in and installed in the natural ground reinforcement pipe 15.

  Furthermore, since the coupling consisting of the plug 8a and the socket 9a can be used as the pipe joint 7, the plurality of short tubes 2, 3, 4 can be connected by so-called one-touch, 3, 4 can be easily performed in a short time.

  In the above description, the plurality of short tubes 2, 3, 4 are detachably connected via the pipe joint 7. However, the plurality of short tubes 2, 3, 4 are connected via the pipe joint 7. After connecting, the connecting ends of the short tubes 2, 3, 4 may be integrally fixed with an adhesive or the like.

  In the above description, the three consolidations of the first consolidation material injection tube 1a, the second consolidation material injection tube 1b, and the third consolidation material injection tube 1c are provided in the natural ground reinforcement tube 15. Although the material injection tube 1 is inserted, one, two, or four or more consolidated material injection tubes 1 may be inserted into the natural ground reinforcement tube 15.

DESCRIPTION OF SYMBOLS 1 Consolidated material injection tube 1a 1st consolidated material injection tube 1b 2nd consolidated material injection tube 1c 3rd consolidated material injection tube 2 Short tube for tip 2a Front opening 2b Rear end opening 3 Intermediate short tube 3a Front opening 3b Rear end opening 4 Rear end short pipe 4a Front end opening 4b Rear end opening 5 Injection hole 6 Cap 7 Fitting 8 Male member 8a Plug 8b Male thread part 9 Female member 9a Socket 9b Male thread part 10 Socket 11 Opening and closing valve 12 Flexible pipe 13 Plug member 15 Ground reinforcement pipe 16 Open end 20 Ground

Claims (5)

A consolidated material injection pipe for injecting a consolidated material into a natural ground reinforcement pipe,
A plurality of short pipes made of a hard material that can be cut together with the natural ground reinforcing pipe are connected via a pipe joint, one end is inserted into the natural ground reinforcing pipe, and the other end is the natural ground reinforcing pipe. Formed into a length that is pulled out ,
The pipe joint is attached to an end of one short pipe of two short pipes connected to each other, and attached to an end of the other short pipe, and is connected to the male member. A female member,
Sockets covering the connecting portion between the male member and the one short tube and the connecting portion between the female member and the other short tube are respectively bonded to the one short tube and the other short tube. A solidified material injection tube characterized by comprising: Wherein each short tube, with injection holes through the inner and outer are respectively provided at a plurality of locations, the end opening of the short tube on the distal end side of claim 1, characterized in that it is closed by a cap solid Binder injection tube. The consolidated material according to claim 1 or 2 , wherein a flexible tube is connected to an end opening of the short tube on the rear end side, and is connected to a consolidated material supply source via the flexible tube. Injection tube. 4. The consolidated material injection pipe according to claim 3 , wherein an open / close valve is provided between the flexible pipe and the short pipe on the rear end side to open and close between them. When cutting a ground reinforcement pipe in connection with excavation of a natural ground, a plurality of short pipes made of a material that can be cut together with the natural ground reinforcement pipe are sequentially connected via a pipe joint for the reinforcement of the natural ground. It is inserted into the pipe, one end is inserted into the ground reinforcement pipe, and the other end is a construction method of the consolidation material injection pipe formed to a length drawn out of the ground reinforcement pipe,
The pipe joint is attached to an end of one short pipe of two short pipes connected to each other, and attached to an end of the other short pipe, and is connected to the male member. A female member,
Sockets covering the connecting portion between the male member and the one short tube and the connecting portion between the female member and the other short tube are respectively bonded to the one short tube and the other short tube. A method for constructing a filler injection pipe characterized by the above.

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