JP4536371B2 - Injection material injection device - Google Patents

Description

  The present invention relates to an injection material injection apparatus.

  Conventionally, the air gap generated between the retaining wall and the back ground causes ground subsidence on the back of the retaining wall.

  In addition, it occurred between the tunnel lining body such as the lining body by the concrete placement in the mountain tunnel method, the lining body constructed by assembling the segments in the shield method, and the pipe body used in the propulsion method and the ground The air gap also causes ground subsidence, and when the air gap is buried, excessive pressure due to the weight of the earth and sand is applied to the tunnel lining body, which is dangerous.

  Furthermore, in the above-mentioned propulsion method, the space between the ground and the pipe is filled with earth and sand, and thus frictional resistance is generated between the pipe and the ground, which may make it difficult to propel the pipe.

  Therefore, in order to prevent the gap from being filled with earth and sand, a means for providing a plurality of inlets to the retaining wall and the tunnel lining body and injecting an injection material into the gap from the inlet has been proposed.

  However, in order to uniformly inject the injection material into the gap generated in the structure and the ground, the injection material must be derived from a plurality of injection ports at the same time and injected into the clearance. Since the pump is provided, there is a problem that the cost is high and the facility is large.

  In particular, for example, when the injection material is a two-component injection material, a distribution pipe is provided at each injection port, and a lead-out pump is provided for each distribution pipe. Therefore, the above problem becomes more significant.

  This invention solves said problem and provides the injection material injection | pouring apparatus which can carry out injection | pouring small, economical and favorable.

  The gist of the present invention will be described with reference to the accompanying drawings.

A grout injection apparatus for injecting a grout into the gap 3 between the tube 12 need use the ground 1 and jacking method, the injection material the skids and the space 3 during propulsion of the tubular body 12 The filling material exhibits both functions, and the injection material is a two-component type in which two components are mixed, and a plurality of injections in which the injection material is injected into the peripheral surface of the tube body 12 A material injection port 4 is arranged in a ring shape in the circumferential direction of the tube body 12, and a distribution pipe 5 is provided in the injection material injection port 4, and this distribution pipe 5 is connected to an injection material supply source 7. An injection material supply pipe 6 is provided, and the distribution pipe 5 includes a first liquid distribution pipe 5A and a second liquid distribution pipe 5B connected to each injection material injection port 4, and the injection material supply. The pipe 6 includes a first liquid injection material supply pipe 7A connected to the first liquid injection material supply source 7A and the first liquid distribution pipe 5A, and a second liquid injection material supply. 7B and the second liquid injection material supply pipe 6B connected to the second liquid distribution pipe 5B, the first liquid injection material supply source 7A, the first liquid injection material supply pipe 6A, The first liquid distribution path composed of the first liquid distribution pipe 5A and the injection material injection port 4, the second liquid injection material supply source 7B, the second liquid injection material supply pipe 6B, and the second liquid. The second liquid flow path constituted by the liquid distribution pipe 5B and the injection material injection port 4 is provided with one derivation pump 8 common to both flow paths. It is related.

2. The injection material injection apparatus according to claim 1 , wherein the lead-out pump 8 includes the first liquid distribution pipe 5A and the second liquid distribution pipe 5B, the first liquid injection material supply pipe 6A, and the first liquid distribution pipe 5A. One of the two liquid injection material supply pipes 6 </ b> B is provided at a connecting portion, and the injection material injection device is provided.

Further, in the injection material injection device according to any one of claims 1 and 2 , each of the distribution pipes 5 is provided with a valve 9 for adjusting an amount of the injection material derived from the injection material injection port 4. The present invention relates to an injection material injecting apparatus.

4. The injection material injection apparatus according to claim 3 , wherein each valve 9 is controlled by a computer 10.

5. The injection material injection device according to claim 4 , wherein the computer is controlled based on information from a pressure sensor 11 provided around the injection material injection port. It is related to.

The injection material injection device according to any one of claims 1 to 5 , wherein the tube body 12 is made of concrete or steel, and is related to the injection material injection device. is there.

  In the present invention, a plurality of injection material injection ports for injecting an injection material into the gap are provided, each of the injection material injection ports is provided with a distribution pipe, and this distribution pipe is connected to an injection material supply source. An injection material supply pipe is provided, and an injection material distribution path including an injection material supply source, an injection material supply pipe, a distribution pipe, and an injection material injection port has one outlet pump for leading the injection material from the injection material injection port. Since it is provided, the injection material is led out from each of the plurality of injection material inlets by one discharge pump.

  Therefore, it becomes a small and economical injection material injection device.

  The preferred embodiment of the present invention will be briefly described with reference to the drawings.

  The single injection pump 8 leads the injection material from the injection material supply source 7 to the injection material supply pipe 6. The injection material is supplied to the distribution pipe 5, and further from the distribution pipe 5 to the plurality of injection material injection ports 4. Deriving and injecting the injection material from the injection material injection port 4 into the gap 3 between the ground 1 and the pipe body 12 prevents ground subsidence, and prevents excessive pressure from being applied to the pipe body 12. The propulsion is smoothly performed when the tube is propelled. At this time, the injected material is also filled in cracks generated in the ground 1, and the ground 1 is reinforced.

  In the present invention, since the injection material is led out from the injection material injection port 4 by the single extraction pump 8 as described above, the number of injection pumps required is the same as the number of the injection material injection ports 4. Therefore, it becomes difficult to cope with a small-sized structure because the size of the injection material injection apparatus is small and economical.

  A specific embodiment of the present invention will be described with reference to FIG.

In this embodiment, the tubular body 12 used in the propulsion method as the structure 2 is employed, and the outer circumferential surface of the tubular body 12 and the ground 1 are reduced in order to reduce the frictional resistance between the outer circumferential surface of the tubular body 12 and the ground 1. And an injection material injection device for injecting a two-component injection material comprising a first liquid and a second liquid into the gap 3.

  In this injection material injection device, a plurality of injection material injection ports 4 for injecting the injection material into the gap 3 are provided in the tube body 12, and each of the injection material injection ports 4 has a first liquid distribution pipe 5 </ b> A and a second pipe. The liquid distribution pipe 5B is connected to the first liquid distribution pipe 5A and the second liquid distribution pipe 5B to the first liquid injection material supply source 7A and the second liquid injection material supply source 7B, respectively. The first liquid injection material supply pipe 6A and the second liquid injection material supply pipe 6B are connected to each other. The first liquid injection material supply source 7A, the first liquid injection material supply pipe 6A, A first liquid distribution path composed of a first liquid distribution pipe 5A and an injection material injection port 4, a second liquid injection material supply source 7B, a second liquid injection material supply pipe 6B, and a second liquid distribution pipe 5B. The second liquid flow path constituted by the injection material inlet 4 is provided with one derivation pump 8 common to both flow paths.

  Further, the distribution pipe 5 is provided with a valve 9 for adjusting the amount of the injection material derived from the injection material inlet 4, and the valve 9 is based on the information of the pressure sensor 11 provided around the injection material injection port 4. The structure is controlled by the computer 10, and the injection material is led out from the injection material injection port 4 and injected into the gap 3 between the outer peripheral surface of the tube 12 and the ground 1.

  Next, the injection material will be described.

Examples of the injection material include cement, bentonite, granular lubricant, water, gel material, gaseous material, etc., soil improvement material for preventing the lubricant from penetrating the ground 1, and collapse of the ground 1. It is possible to employ a material made of a backing material such as concrete or mortar for preventing the above.

  In the present embodiment, a two-pack type injection material is used in order to prevent the injection material from consolidating in the distribution channel and to adjust the time until the injection material is solidified in the gap 3. This two-part injection material does not solidify with only one liquid, but it solidifies by mixing the first liquid and the second liquid. Can be adjusted. The solidification start time is either an instantaneous type that changes from a liquid to a solid in several tens of seconds to several tens of minutes, or a late type that changes in several hours to several days. Is done.

  Specifically, the injection material of the present embodiment, that is, the injection material used for reducing the frictional resistance between the outer peripheral surface of the tube body 12 and the ground 1 does not run out of the target range and significantly reduces friction. It is a two-part injection material that shows the effect, has a water-stopping effect around the tube body 12, and has the property of solidifying in water, and changes from liquid to solid in tens of seconds after mixing. Those that exhibit caking properties are used.

  Next, the injection material injection device of the present embodiment will be described in detail.

  The pipe body 12 has a plurality of annular injection material injection ports 4 for leading the injection material in the middle of a concrete or steel pipe body.

  The injection material inlet 4 is provided with a nozzle 13 to which a distribution pipe 5 consisting of a first liquid distribution pipe 5A and a second liquid distribution pipe 5B, which will be described later, is connected. Accordingly, the two kinds of injection materials, the first liquid and the second liquid, are mixed and led out from the nozzle 13.

  In this way, in this embodiment, different types of injection materials can be led out from one nozzle 13 at the same time, and can be mixed immediately before injection into the gap 3, so that the first liquid and the second liquid are mixed. Even in the case of a two-pack type injection material that develops caking properties for the first time, it can be reliably injected into the gap 3 and solidified.

  The nozzle 13 and the first liquid distribution pipe 5A and the second liquid distribution pipe 5B are detachably formed, and the nozzle 13 is provided with a check valve for preventing the backflow of the injection material.

  The first liquid distribution pipe 5 </ b> A and the second liquid distribution pipe 5 </ b> B are a plurality of branch pipes connected to a first liquid injection material supply pipe 6 </ b> A and a second liquid injection material supply pipe 6 </ b> B, which will be described later. It is.

  The first liquid injection material supply pipe 6 </ b> A and the second liquid injection material supply pipe 6 </ b> B are connected to the first liquid injection material supply source 7 </ b> A and the first liquid supply container 7 </ b> A via a single discharge pump 8. The pipes are respectively connected to the two-liquid injection material supply source 7B.

  The valve 9 is an electric valve that is provided in each of the first liquid distribution pipe 5A and the second liquid distribution pipe 5B that are branched into a plurality of portions and is electrically opened and closed. The valve 9 is connected to a computer 10 and is automatically controlled by the computer 10.

  Specifically, the computer 10 performs injection to be injected into the gap 3 based on the information (gap pressure value) of the pressure sensor 11 provided at the gap 3 between the ground and the pipe body 12 and the discharge port of the outlet pump 8. Control information values such as material injection amount, injection pressure, injection time, and injection order are determined and automatically controlled. In other words, the present embodiment has a configuration in which the valve 9 can be controlled by a predetermined timing, operation order, opening degree, opening time, and the like.

  The computer 10 uses a sequencer that incorporates these control information values in advance, regardless of pressure sensor information, so that the switching of the injection order can be controlled in seconds, so that injection can be performed quickly and reliably. Anyway.

  In the case of manual valve operation, it takes time to inject the injection material, and the injection amount and simultaneous injection become inaccurate, but in this embodiment, the plurality of first liquid distribution pipes 5A and the second liquid distribution pipes are used. The injection material can be accurately injected into the injection material injection port 4 sequentially from 5B, and the injection amount and the injection time can be appropriately controlled for each injection material injection port 4 based on the information of the pressure sensor 11. Therefore, the injection of the injection material can be performed accurately and in a short time, and the risk that an excessive pressure is applied to the structure or the gap 3 is insufficiently filled can be avoided, and the injection material injection work can be made efficient.

  In addition, when injecting an injection material into a plurality of injection ports with one lead-out pump, it is considered that clogging may occur in the injection port and its periphery due to a time lag in which injection is sequentially performed into the plurality of injection material injection ports 4. In the case of the embodiment, because of the above control, the injection material is injected non-uniformly around the entire circumference of the tunnel covering body (tube body), so that an uneven load is not applied to the tunnel covering body. Furthermore, the frictional resistance does not increase due to the non-uniform injection of the injection material throughout the tube.

  In the present embodiment, an electric valve that operates by energization is employed as the valve 9, but a solenoid valve, a cylinder valve that operates by air, a hydraulic valve that operates by hydraulic pressure, or the like may be employed.

  Since the present embodiment is configured as described above, a single lead-out pump 8 can inject a two-liquid type injection material composed of the first liquid and the second liquid into the plurality of injection material injection ports 4, as in the prior art. The equipment cost increases as in the case of injecting the injection material by providing one outlet pump for each injection material injection port 4, or the equipment becomes large and it becomes difficult to cope with a small structure. The injection material can be injected in a small and economical manner, and the valve 9 can be automatically controlled by the computer 10 to perform good injection.

  In this example, the pipe body 12 used in the propulsion method is adopted as the structure 2, but as the other structure 2, the retaining wall, the lining body by the concrete placement in the mountain tunnel method, the segment in the shield method A tunnel lining body other than the pipe body 12 such as a lining body may be adopted.

  In the present embodiment, the plurality of injection material injection ports 4 are annularly arranged in order to reliably lead out the injection material around the tube material 12, but when the injection material injection ports 4 are provided on a retaining wall or the like, The plurality of injection material injection ports 4 may be arranged in tandem. At this time, in consideration of the gravitational action, it is possible to reliably introduce the injection material when the injection materials are led out from the bottom to the top of each injection material injection port 4. Can be derived.

  Further, in this embodiment, in order to control the injection amount of the injection material for each injection material injection port 4, the valve 9 is provided in each of the first liquid distribution pipe 5A and the second liquid distribution pipe 5B. In the case where the injection material may be simply led out simultaneously from the injection material injection ports 4, it is not always necessary to provide the valves 9 in the first liquid distribution pipe 5A and the second liquid distribution pipe 5B. The injection material supply pipe 6A and the second liquid injection material supply pipe 6B may be provided with valves 9 respectively.

It is explanatory drawing of a present Example.

DESCRIPTION OF SYMBOLS 1 Ground 2 Structure 3 Space | gap 4 Injection material injection port 5 Distribution pipe 5A First liquid distribution pipe 5B Second liquid distribution pipe 6 Injection material supply pipe 6A First liquid injection material supply pipe 6B Second liquid injection material Supply pipe 7 Injection material supply source 7A First liquid injection material supply source 7B Second liquid injection material supply source 8 Lead pump 9 Valve
10 computers
11 Pressure sensor

Claims (6)

A grout injection apparatus for injecting a grout into the gap between the tube which need use the ground as jacking method, the injection material of the filler filling the lubricating material and the gap at the time of the promotion of the tubular body In addition, the injection material is a two-component type that mixes two components, and a plurality of injection material injection ports for injecting the injection material are provided on the peripheral surface of the tube body. juxtaposed annularly in the circumferential direction of the body, the injection material inlet provided the distribution pipe, this distributor pipe injection material supply pipe provided continuously with grout source is provided, wherein the distribution pipe The first liquid distribution pipe and the second liquid distribution pipe connected to each injection material injection port, the injection material supply pipe, the first liquid injection material supply source and the first liquid of the first liquid The first liquid injection material supply pipe connected to the distribution pipe, the second liquid injection material supply source, and the second liquid injection material connected to the distribution pipe of the second liquid A first liquid flow path comprising the first liquid injection material supply source, the first liquid injection material supply pipe, the first liquid distribution pipe, and the injection material injection port. The second liquid flow path composed of the second liquid injection material supply source, the second liquid injection material supply pipe, the second liquid distribution pipe and the injection material injection port is common to both flow paths. An injecting material injecting apparatus, wherein one outlet pump is provided . In injection material injection apparatus according to claim 1, wherein the deriving the pump and dispensing tube of the dispensing tube and the second liquid of the first liquid, injection material supply of the injection material supply pipe and the second liquid of the first liquid An injection material injecting apparatus, wherein one is provided at a connecting portion with a pipe. 3. The injection material injection device according to claim 1 , wherein each distribution pipe is provided with a valve for adjusting an amount of the injection material derived from the injection material injection port. Injection material injection device to do. 4. The injection material injection device according to claim 3 , wherein each of the valves is controlled by a computer. 5. The injection material injection apparatus according to claim 4 , wherein the computer is controlled based on information from a pressure sensor provided around the injection material injection port. The injection material injection device according to any one of claims 1 to 5 , wherein the pipe body is made of concrete or steel.

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