JP2009114629A - Method for filling inner filling material into long pipe - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for filling an inner filling material into a long pipe for simply and securely preventing a piping member from coming off due to excessive pressure boosting in a pipe for filling the inner filling material in the long pipe such as a pipe roof pipe or the like and achieving satisfactory construction property by the lightweight and easily handled piping member and speedy filling work. <P>SOLUTION: A relief valve device 20 is composed of a discharge port 22, a natural raw rubber plate 23, a tightening band 24 or a relief valve 25. These relief valve devices 20 are arranged at a predetermined interval in the direction of pipe axis in the pipe 10 for filling the inner filling material installed in the pipe roof steel pipe 2 of the long pipe to be filled with the inner filling material. If internal pressure in the pipe 10 exceeds predetermined pressure, the inner filling material 4 in the pipe 10 is made to leak the outside of the pipe 10 by the relief valve device 20 to reduce internal pressure and excessive force acting on a joint part being a weak point in order to prevent the piping member 11 from coming off. A lightweight and easily handleable synthetic resin pipe such as a vinyl chloride pipe or the like is used as the piping member 11, and these synthetic resin pipes are mutually joined by adhesive in the joint part to constitute the pipe 10. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a method for filling a filling material into a long pipe such as a pipe in a non-cutting method using a pipe roof.

  Conventionally, when building an underground structure such as a tunnel across a track or under a road, a plurality of steel pipes are penetrated into the ground under the track or under the road prior to tunnel excavation. The buried steel pipe is filled with cement milk, mortar, etc., and the pipe roof covering the outer periphery of the tunnel receives the orbital load and road load, and the underground structure box is buried under the pipe roof. However, a non-open-cut method for crossing under the road structure that does not impede the flow of a traveling train or car has been performed (for example, see Patent Document 1).

  FIG. 3 is a vertical sectional view showing an example of the pipe roof construction method. Prior to the propulsion embedding of the box 1a of the underground structure 1, the pipe roof steel pipe 2 is propulsion embedded, and the upper part and both sides of the box 1a. A gate-shaped pipe roof protector is formed. The steel pipes 2 are joined to each other at the junction 3, and the filling material 4 is injected and filled into the steel pipes 2.

  FIG. 4 is a horizontal sectional view, a vertical sectional view and a transverse sectional view along the tube axis direction showing an example of the filling method of the filling material, and for filling the filling material installed in the long pipe roof steel pipe 2. The filling material 4 is injected and filled into the steel pipe 2 by the pipe 10. In this illustrated example, the diameter of the pipe roof steel pipe 2 is about 800 mm, and the diameter of the filling material filling pipe 10 is about 90 mm. Since the pipe roof steel pipe 2 is as long as, for example, 150 m, a plurality of pipes 10 having different lengths are arranged, and the steel pipe 2 is sequentially filled from the distal end side to the intermediate portion and the proximal end side. Made. Further, each filling material filling pipe 10 is formed by connecting, for example, a pipe material 11 of about 4 m with a joint.

  As the piping material 11, a vinyl chloride pipe or an SGP pipe (carbon steel pipe for piping) is used. In the case of a vinyl chloride pipe, the piping materials are joined together with an adhesive at the joint. In the case of an SGP pipe, it is joined with a screw or the like. Further, a pump 12 is connected to the base end of the filling material filling pipe 10, and the filling material such as mortar is pumped by the pump 12, and the filling material is discharged from the tip of the filling material filling pipe 10. The

  In filling the filling material into such a long pipe, when a vinyl chloride pipe is used as the piping material 11, if an excessive pressure rise occurs in the piping 10 for filling the filling material, the joint of the piping material 11 There was a possibility that the piping material 11 would come off at the part. Once the piping material 11 is removed, reconnection becomes impossible, and as a result, uniform filling of the filling material into the long tube becomes impossible.

  When using SGP pipes, there is no risk of disconnection unlike vinyl chloride pipes, but they are more expensive than vinyl chloride pipes, etc., and they are heavy, so they can be used for small transports and connections in narrow long pipes. It takes time and workability is poor.

  In addition, there exists patent document 2 as a prior art document relevant to this invention. The invention of Patent Document 2 relates to a method and an apparatus for filling an inner and outer gap of a propulsion pipe (sheath pipe) laid by the propulsion method, and a second method between the sheath pipe and the main pipe drawn into the interior. The gap was filled with a filler such as mortar, the completion of filling was detected by the outflow of the filler from the relief valve, the relief valve was closed and the injection of the filler was continued to provide the second gap. The check valve is opened to fill the first gap between the natural mountain and the sheath pipe with the filler.

JP 2006-104744 A JP-A-6-50464

  As described above, when a vinyl chloride pipe is used for the filling material filling pipe, there is a risk that the pipe material may come off at the joint due to excessive pressure rise in the pipe. A technique that can reliably prevent this is desired.

  The present invention can easily and reliably prevent pipe material from being pulled out due to excessive pressure rise in the pipe in the filling pipe for filling the filling material in a long pipe such as a pipe roof. It is an object of the present invention to provide a filling material filling method for a long pipe that is easy to construct and can be quickly filled with a workable pipe material.

  According to the first aspect of the present invention, a filling material filling pipe formed by connecting a plurality of piping materials having a diameter smaller than the diameter in a long tube so as to be continuous in the tube axis direction is installed. In the method of filling the filling material into the long tube, the medium filling material is pumped from the base end side to the distal end side of the material filling pipe and the filling material is filled into the long tube. A filling valve filling method for filling a long pipe characterized in that a relief valve device for leaking the filling material in the pipe to the outside of the pipe when the pressure exceeds a predetermined pressure is provided in the filling material filling pipe. .

  The present invention is applied to, for example, a case where a filling material such as mortar is filled in a long pipe roof steel pipe in a pipe roof construction method for a crossing structure under a non-opening method. Moreover, it is applied when the filling material filling pipe installed in a long pipe such as a pipe roof steel pipe joins a pipe material having a unit length with an adhesive or the like at a joint. A relief valve device is arranged in the pipe for filling the filling material at a predetermined interval in the pipe axis direction (see FIG. 1 (a)).

  Pressure adjustment function when excessive pressure rise occurs in the filling tube for filling when filling the long filling tube by pumping the filling material from the base end side of the filling material filling pipe to the tip side with a pump When the relief valve device having the above is operated, the filling material in the pipe leaks out of the pipe, and the pressure in the pipe decreases. Due to the decrease in the internal pressure, an excessive acting force on the joint portion of the piping material, which is a weak point, is reduced, and the piping material is prevented from coming out.

  The invention according to claim 2 of the present invention is the filling method for filling a filling material into a long pipe according to claim 1, wherein the piping material is a synthetic resin pipe.

  Piping materials include hard polyvinyl chloride pipes (thick wall pipes VP, thin wall pipes VU), hard polyvinyl chloride pipes (PVC), and other lightweight, easy-to-handle synthetic resin pipes (SGP pipes have a specific gravity of about 7.8) The specific gravity is preferably 1.5 or less.

  Synthetic resin pipes such as vinyl chloride pipes are cheaper than SGP pipes and are light in weight so that they can be easily transported and connected, and workability is better than SGP pipes. Can do.

  According to a third aspect of the present invention, in the filling material filling method according to any one of the first and second aspects, the relief pipe material for relief disposed between the pipe material and the pipe material is relief. A filling device filling method for filling a long tube, characterized in that a valve device is provided.

  It is preferable that a discharge port is provided in the piping material for relief having a short length, a relief valve device is provided in the discharge port, and the piping material for relief is disposed between the piping material and the piping material (FIG. 1 (b). ) (c)).

  The invention according to claim 4 of the present invention is the filling material filling method according to any one of claims 1 to 3, wherein the relief valve device includes a discharge port provided in the piping material, A rubber plate that can be expanded by fluid pressure and is attached to the outer surface of the piping material centered on the discharge port so as to close the discharge port, and a fastening member that fastens the rubber plate to the piping material on both sides centered on the discharge port; It is comprised from these, The filling material filling method into the elongate pipe | tube characterized by the above-mentioned.

  As illustrated in FIG. 1 (b), this is a simple relief valve device comprising a rubber plate rich in elasticity such as natural candy rubber and a fastening member such as a band-iron type fastening band, and can be manufactured from a commercially available material. . When the internal pressure of the filling material filling pipe exceeds a predetermined pressure, the internal filling material leaks from the discharge port while expanding the rubber plate. When the internal pressure decreases, the original state is restored and the relief operation can be performed again. The relief valve operating pressure can be set by the thickness and material of the rubber plate, the fastening force of the fastening member, and the like.

  The invention according to claim 5 of the present invention is the filling material filling method according to any one of claims 1 to 3, wherein the relief valve device is attached to a discharge port provided in the piping material. A filling material filling method for a long tube characterized by a relief valve that is normally kept closed and opens when a predetermined pressure is exceeded.

  As shown in FIG. 1 (c), the relief valve device is provided with a relief valve at the discharge port, and the valve body of the relief valve is pressed against the valve seat by a pressing force of a spring, a hinge spring, etc. When the internal pressure of the material filling pipe exceeds a predetermined pressure, the valve body opens away from the valve seat against the pressing force. When the internal pressure of the filling material filling pipe exceeds a predetermined pressure, the relief valve opens and the internal filling material leaks out. When the internal pressure decreases, the original state is restored and the relief operation can be performed again. The relief valve operating pressure can be set by adjusting the pressing force of a spring or the like.

  In addition, a certain degree of effect can be expected only by providing discharge ports at intervals in the tube axis direction in the filling material filling pipe. However, when the diameter of the discharge port is large, the outflow amount from the discharge port is increased, and the pressure in the pipe is drastically reduced, so that the discharge amount from the tip may be decreased. Furthermore, there is a possibility that uniform filling cannot be performed due to the filling material flowing out in the vicinity of the discharge port. On the other hand, when the diameter of the discharge port is small, material separation of air mortar (because only paste or air flows out) may occur, and the quality may change. Therefore, it is preferable to provide a relief valve device at the discharge port as in the present invention.

  Since the present invention is configured as described above, the following effects can be obtained.

(1) In the filling material filling pipe that fills the inside of a long pipe such as a pipe roof, if an excessive pressure rise occurs in the pipe, the relief valve device with a pressure adjustment function will Since the filling material is leaked out of the pipe and the pressure in the pipe is reduced, it is possible to easily and reliably prevent the pipe material from coming off due to excessive pressure rise in the pipe. It is possible to uniformly fill the whole and to obtain a long filling tube filled with a good quality filling material.

(2) Since it is only necessary to provide a relief valve device in advance for the filling material filling pipe, workability is good.

(3) Lightweight and easy-to-handle synthetic resin pipes such as vinyl chloride pipes can be used for piping materials, so steel pipes for filling filling materials can be constructed with inexpensive piping materials and workability is good. Rapid filling work is possible, and cost and construction period can be shortened.

  Hereinafter, the present invention will be described based on the illustrated embodiments. This embodiment is an example applied when an underpass is constructed under a road by a non-open cutting method using a pipe roof. FIG. 1 is a horizontal sectional view along the tube axis direction showing an example of an apparatus for carrying out the filling material filling method of the present invention. FIG. 2 is a diagram showing an example of the internal pressure distribution of the filling material filling pipe.

  As shown in FIG. 1, a pipe roof steel pipe (for example, a diameter of about 800 mm, a length of 150 m) 2 as a long pipe to be filled is filled with a plurality of (four) filling materials filling pipes as injection pipes. 10 (for example, a diameter of about 90 mm) is installed. Each of the filling material filling pipes 10 has a different length, and the first discharge port at the tip of the longest pipe 10-1 is located on the tip side of the steel pipe 2. A 2nd discharge port and a 3rd discharge port are located in the intermediate part of the steel pipe 2, and the 4th discharge port of the shortest piping 10-4 is located in the base end side of the steel pipe 2. FIG. The base end of each pipe 10 is installed so as to protrude outward from the closed end face on the base end side of the steel pipe 2, and the pump 12 is connected thereto.

  As shown in FIG. 4, each filling material filling pipe 10 is arranged in a horizontal parallel state at the upper part in the steel pipe 2, and is supported by a plurality of pipe fixing fittings 13 arranged at intervals in the pipe axis direction. Is done. In addition, air vent valves 14 are provided on the closed end faces of both ends of the steel pipe 2.

  For the piping material 11 (for example, about 90 mm in diameter and 4 m in length) constituting the filling material filling piping 10, a hard polyvinyl chloride pipe (thick wall pipe VP, thin wall pipe VU), a hard polyvinyl chloride pipe (PVC) Other lightweight, easy-to-handle synthetic resin tubes are used. The piping members 11 are joined to each other by an adhesive at the joint.

  In such a filling material filling pipe 10, in the present invention, as shown in FIG. 1A, if the internal pressure of the filling material filling pipe 10 exceeds a predetermined pressure, the filling material 4 in the pipe 10 is removed. A plurality of relief valve devices 20 that leak out of the pipe 10 are arranged at predetermined intervals in the pipe axis direction, and the internal pressure is reduced by the relief valve device 20, thereby reducing the excessive acting force on the joints that are weak points. Thus, the piping material 11 is prevented from coming out.

  The relief valve device 20 is preferably provided on the piping material 21 by providing a piping material 21 for relief between the piping material 11 and the piping material 11. Moreover, since the relief valve device 20 is left and embedded in the steel pipe 2 together with the piping material, a simple and low-cost one is preferable.

  FIG. 1B shows an example of a simple relief valve device 20 that can be made of a commercially available material. A discharge port 22 drilled in the piping material 21 and a rubber plate rich in elasticity such as natural candy rubber. 23 and a belt-type fastening band 24. A rubber plate 23 is attached to the outer surface of the piping material 21 so that the discharge port 22 is positioned at the center, and fastening bands 24 are arranged on both the left and right sides of the rubber plate 23 around the discharge port 22, and the fastening band 24 is tightened. The rubber plate 23 is fixed to the piping material 21 by fixing.

  In the case of the relief valve device 20 using the rubber plate, when the internal pressure of the filling material filling pipe 10 exceeds a predetermined pressure, the internal filling material 4 leaks from the discharge port 22 while expanding the rubber plate 23. When the internal pressure decreases, the original state is restored and the relief operation can be performed again. The relief valve operating pressure can be set by the thickness and material of the rubber plate 23, the fastening force of the fastening band 24, and the like.

  FIG. 1C shows an example of a relief valve device 20 using a relief valve, which is composed of a discharge port 22 drilled in a piping material 21 and a relief valve 25 provided in the discharge port 22. . The relief valve 25 presses the valve body 25a against the valve seat 25b with a pressing force such as a spring or a hinge spring and closes the valve body 25a. When the internal pressure of the filling material filling pipe 10 exceeds a predetermined pressure, the relief valve 25 resists the pressing force. The body 25a is configured to open away from the valve seat 25b.

  Also in the relief valve device 20 using this relief valve, when the internal pressure of the filling material filling pipe 10 exceeds a predetermined pressure, the relief valve 25 is opened and the internal filling material 4 leaks out. When the internal pressure decreases, the original state is restored and the relief operation can be performed again. The relief valve operating pressure can be set by adjusting the pressing force of a spring or the like.

  The relief valve device 20 as described above prevents the piping material 11 from coming out. Plumbing of polyvinyl chloride pipes and the like is mainly caused by poor construction of the connecting portion (usually because of poor bonding due to bonding with an adhesive in the field). When an internal pressure of ˜0.3 MPa is set to act, the pressure can be reduced at P ′ = P + ΔP (0.2 MPa) or more.

  In the present invention as described above, the filling material filling operation is performed in the following procedure (see FIG. 2). The pump 12 is a non-piston type Moino pump that has no pulsation and has an accurate pumping amount.

(1) After the pipe roof steel pipe 2 is propelled and buried under the road, the pipe material 11 is inserted into the steel pipe 2 while being added, and the filling material filling pipe 10 is installed. A relief valve device 20 is arranged in the pipe 10 by a pipe material 21 at a predetermined interval in the pipe axis direction.

(2) The mortar is sequentially injected from the long pipe 10 among the set pipes 10. When the filling is completed (when the pressure rises to some extent), the process moves to the next pipe 10.

  The internal pressure of the piping 10 fluctuates as shown in FIG. 2, for example, and when the operating set pressure of the relief valve device 20 is exceeded, the relief valve device 20 is activated and the internal pressure is reduced, thereby preventing the piping material 11 from coming out. Is done. Since the piping material is prevented from being pulled out during filling, the filling material 4 can be uniformly filled throughout the pipe roof steel pipe 2, and a pipe roof steel pipe with good quality can be obtained.

  In addition, piping materials made of synthetic resin pipes such as vinyl chloride pipes are cheaper than SGP pipes and are light in weight so that they can be easily transported and connected, and workability is better than SGP pipes. The daily construction amount also increases.

  In addition, although the above demonstrated the example which fills a long pipe roof steel pipe with filling materials, such as mortar, it is not restricted to this, This invention is applied also when filling a filling material into other long pipes. can do.

BRIEF DESCRIPTION OF THE DRAWINGS It is an example of the apparatus for enforcing the filling material filling method of this invention, (a) is a horizontal sectional view along a pipe-axis direction, (b), (c) is the elements on larger scale. It is a figure which shows an example of distribution piping of the filling material in this invention, and its internal pressure. It is a vertical sectional view showing an example of a pipe roof construction method to which the present invention is applied and its pipe roof steel pipe. It is an example of piping for filling the filling material in a pipe roof steel pipe to which the present invention is applied, (a) is a horizontal sectional view along the pipe axis direction, (b) is a vertical sectional view along the pipe axis direction, (c ) Is a cross-sectional view.

Explanation of symbols

1 …… Underground structure (tunnel)
1a ... Box 2 ... Pipe roof steel pipe 3 ... Junction 4 ... Filling material (mortar, etc.)
DESCRIPTION OF SYMBOLS 10 ... Piping for filling filling material 11 ... Piping material 12 ... Pump 13 ... Pipe fixing bracket 14 ... Air vent valve 20 ... Relief valve device 21 ... Relief piping material 22 ... Discharge port 23 ... Rubber plate (natural candy rubber)
24 ... Fastening member (fastening band)
25 ... Relief valve 25a ... Valve element 25b ... Valve seat

Claims (5)

Inside the long pipe is installed a filling material filling pipe that connects multiple pipe materials with a diameter smaller than the diameter in the direction of the pipe axis. In the method of filling the filling material into the long tube by pumping the filling material to the side and filling the filling material into the long tube,
A relief valve device is provided in the filling material filling pipe to allow the filling material in the piping to leak out of the piping when the internal pressure of the filling material filling pipe exceeds a predetermined pressure. Filling method of filling material.   2. The filling material filling method according to claim 1, wherein the piping material is a synthetic resin pipe.   3. The filling material filling method according to claim 1, wherein a relief valve device is provided in a relief piping material disposed between the piping material and the piping material. Filling method of filling material into long tube.   The filling material filling method according to any one of claims 1 to 3, wherein the relief valve device includes a discharge port provided in the piping material, and a discharge port centered so as to close the discharge port. A rubber plate that is expandable by fluid pressure and is attached to the outer surface of the piping material to be connected, and a fastening member that fastens the rubber plate to the piping material on both sides centered on the discharge port Filling method of filling material into the scale tube.   The filling material filling method according to any one of claims 1 to 3, wherein the relief valve device is attached to a discharge port provided in the piping material, and is normally kept in a closed state and has a predetermined pressure. A filling valve filling method for a long pipe characterized by being a relief valve that opens when the pressure exceeds.

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