JP2020034062A - Propulsive force transmission device for earthquake-resistant pipe propulsion laying construction method - Google Patents

Abstract

To provide a propulsive force transmission device for an earthquake-resistant pipe propulsion laying construction method in which the propulsive force transmission device can be installed to a spigot of a trailing pipe on the ground furthermore, even after the installation of the propulsive force transmission device, a fitting state of a rubber ring in the groove for the rubber ring of a socket can be confirmed by a check gauge, and as a result, the working hours required for pipe connection can be shortened.SOLUTION: A propulsive force transmission device comprises multiple propulsive force transmission means 13 disposed at intervals along an outer circumferential surface of a spigot 3, and ring-shaped tightening means 12 for fixing the propulsive force transmission means 13 to the outer circumferential surface of the spigot 3. The propulsive force transmission means 13 comprises a wheel 19 for supporting a trailing pipe 5 in a sheath pipe, and a fixing member 20 coming in abutment with the side face of a socket 1 and sandwiched between the spigot 3 and the tightening means 12. A gap is formed between the tightening means 12 and the side face of the socket 1. The tightening means 12 is tightened and the fixing member 20 is pressed on the outer circumferential surface of the spigot 3, and thereby the propulsive force transmission means 13 is fixed to the outer circumferential surface of the spigot 3.SELECTED DRAWING: Figure 1

Description

  The present invention provides a propulsion transmission device for an earthquake-resistant pipe propulsion laying method, in particular, a propulsion transmission device can be mounted on an insertion port of a trailing pipe on the ground, and even after the propulsion transmission device is mounted. The present invention relates to a thrust transmission device for an earthquake-resistant pipe propulsion laying method, which has an effect that the fitted state of a rubber ring can be confirmed by a check gauge.

  In recent years, there are few problems such as road obstruction due to road construction and disposal of excavated soil, and even pipes can be laid even in places where excavation work cannot be performed, such as under tracks, and a pipe-type seismic pipe propulsion laying method has been implemented. Have been.

Patent Literature 1 discloses an example of a sheath-type seismic pipe propulsion laying method. Hereinafter, this sheath pipe type seismic pipe propulsion laying method is referred to as a conventional propulsion laying method and will be described with reference to the drawings.
FIG. 6 is a partial cross-sectional view showing a joint where an insertion port is inserted into a receptacle by a conventional propulsion laying method, FIG. 7 is a cross-sectional view taken along line AA of FIG. 6, and FIG. 8 is a plan view showing a check gauge. FIG. 9 is a cross-sectional view showing a method of checking the insertion state of the rubber ring using a check gauge.

  6 to 9, reference numeral 31 denotes a receiving port of the leading pipe 32, reference numeral 33 denotes an insertion port of the following pipe 35 having a retaining projection 34 formed at a distal end thereof, and reference numeral 36 denotes an inner peripheral surface of the receiving port 31. The lock ring 39 fitted in the formed lock ring groove 37 via the centering ring 38 is a rubber ring fitted in the rubber ring groove 40 formed in the inner peripheral surface of the receiving port 31. , 41 are propulsion force transmission devices.

  The thrust transmitting device 41 includes a protection ring 42 applied to the end face of the receiving port 31 for preventing the grout material from entering the joint, and a wheel 44 fixed in the insertion port 33 and rolling in the sheath tube 43. And a ring-like thrust transmitting member 47 interposed in the insertion opening 33 between the protective ring 42 and the flange 46.

  The thrust transmitting member 47 is made of a foamed resin such as polystyrene or polyurethane, and is not plastically deformed with respect to the propulsive force of the trailing tube at the time of pipe joining, thereby transmitting the propulsive force to the preceding tube. It has a function of plastically deforming against an excessive pushing force due to an earthquake or the like, thereby enabling the joint to contract and preventing the pipe from breaking.

  In order to join the pipes by the conventional propulsion laying method, the protection ring 42 and the thrust transmission member 47 of the thrust transmission device 41 are inserted into the insertion port 33 of the following pipe 35 in advance, and then the following pipe 35 is connected to the underground. And fitted into the receptacle 31 of the preceding tube 32. Next, the flange 46 of the thrust transmitting device 41 is temporarily fastened to the insertion opening 33 with a bolt 45, the thrust transmitting member 47 is brought into close contact with the end surface of the receiving opening 1 via the protective ring 42, and the flange 46 is fully tightened with the bolt 45. Tighten.

  In this way, the leading tube 32 and the trailing tube 35 are joined to each other while maintaining the contraction allowance T (see FIG. 6) at the joint.

JP 2002-295723 A

  According to the conventional propulsion laying method described above, the thrust transmitting member 47 does not plastically deform with respect to the propulsive force of the trailing pipe 35 at the time of pipe joining, so that the propulsive force can be transmitted to the preceding pipe 32.

  On the other hand, the thrust transmitting member 47 is plastically deformed by an excessive pushing force due to an earthquake or the like, so that the joint can be contracted. In this way, the seismic function of the pipe is maintained. However, there were the following problems.

  The insertion port 33 is inserted into the receiving port 31 against the elastic force of the rubber ring 39 fitted into the rubber ring groove 40. At this time, the position of the rubber ring 39 fitted into the rubber ring groove 40 is set. If it is displaced, the water stopping effect at the joint may be impaired. Therefore, it is important to check whether or not the rubber ring 39 is correctly fitted into the rubber ring groove 40 after the insertion hole 33 is fitted into the receiving hole 31.

  After the insertion of the insertion hole 33 into the receptacle 31, the rubber ring 39 is accurately fitted into the rubber groove 40, and it is checked whether or not the rubber ring 39 is at a correct position by using a special check gauge 48 as shown in FIG. Done using. That is, as shown in FIG. 9, the check gauge 48 is inserted from the receiving port 31 along the insertion port 33, and the rubber ring 39 is at a correct position depending on the insertion length b (see FIG. 9) to the end face of the receiving port 31. It is determined whether or not.

  In the conventional propulsion laying method, the check operation using the check gauge 48 cannot be performed after the propulsion force transmission device 41 is attached to the insertion opening 33. This is because there is no gap for inserting the check gauge 48 between the inner peripheral surface of the flange 46 and the outer peripheral surface of the insertion port 33 after the propulsion force transmission device 41 is mounted on the insertion port 33.

  As a result, in the conventional propulsion laying method, the propulsion force transmission device 41 must suspend the trailing pipe 35 underground and insert the insertion port 33 of the trailing pipe 35 into the receptacle 31 of the preceding pipe 32. Could not be attached to the insertion slot 33.

  If the work of mounting the propulsion transmission device 41 can be performed on the ground, the work of mounting the propulsion transmission device 41 and the work of fitting the insertion port 33 into the receptacle 31 underground can be performed separately. As a result that the propulsion force transmission device 41 can be attached to the insertion opening 33 of the trailing pipe 35, the overall work time required for pipe joining is reduced. In particular, the work time underground is greatly reduced.

  Also, the mounting work of the propulsion transmission device 41 underground takes time due to the small working space, but if the mounting work of the propulsion transmission device 41 can be performed on the ground, the insertion hole 33 into the receptacle 31 underground. Since only the fitting work of the pipe and the check work by the check gauge 48 are required, the entire work time required for pipe joining is reduced. In particular, the work time underground is greatly reduced.

  In addition, according to the conventional propulsion laying method, the wheels 44 rolling in the sheath 43 are mounted around the bolts 45 connecting the flanges 46 in a ring shape. As a result of the resistance acting on the bolt 45, the fastening force of the bolt 45 is affected, and the fixing force of the flange 46 to the insertion opening 33 may be reduced.

  Therefore, an object of the present invention is to allow a thrust transmitting device to be mounted on the insertion port of a trailing pipe on the ground, and even after the propulsion transmitting device is mounted, a check gauge for checking the fitted state of the rubber ring. As a result, the work time required for pipe joining can be shortened, and there is no possibility that the fixing force of the fastening means to the insertion port will decrease due to the weight of the preceding pipe and the pipe propulsion resistance. An object of the present invention is to provide a thrust transmitting device for a propulsion laying method.

  The present invention has been made to achieve the above object, and has the following features.

  The invention according to claim 1 is an earthquake-resistant pipe in which pipes joined by fitting the insertion port of the following pipe into the receptacle of the preceding pipe are sequentially inserted into the sheath pipe, and a new pipe is laid in the sheath pipe. In a thrust transmitting device used for a propulsion laying method, a plurality of thrust transmitting means arranged at intervals along an outer peripheral surface of the insertion port, and an outer peripheral surface of the insertion port provided with the thrust transmitting means. The thrust transmitting means comprises a support member for supporting the trailing pipe in the sheath, abutting against an end face of the receptacle, and the insertion port and the fastening means. A gap is formed between the fastening means and the end face of the receptacle, and the fastening means is fastened to press the fixing member against the outer peripheral surface of the insertion port. By The propulsion force transmitting means has a characteristic to be fixed to the outer peripheral surface of the inserted port.

  A second aspect of the present invention is characterized in that, in the first aspect of the present invention, the fastening means includes a single band and a fastening tool for fastening the band.

  A third aspect of the present invention is characterized in that, in the first aspect of the present invention, the fastening means includes a plurality of bands and a fastening tool for fastening the bands.

  According to a fourth aspect of the present invention, in the second or third aspect of the present invention, the fastener comprises a bolt inserted between the ends of the band and a nut screwed to the bolt. It has features.

  The invention described in claim 5 is characterized in that, in the invention described in any one of claims 1 to 4, the number of the propulsion force transmission means is two or more.

  The invention according to claim 6 is the invention according to any one of claims 1 to 5, wherein the fixing member includes a fixing portion curved along an outer peripheral surface of the insertion port, and A mounting portion extending in a tip direction of the insertion port, wherein the fixing portion is sandwiched between the insertion port and the fastening means, and the support member is provided in the mounting portion. It is.

  The invention according to claim 7 is characterized in that, in the invention according to any one of claims 1 to 6, the support member comprises a wheel.

  According to the present invention, a plurality of propulsion force transmitting means are arranged at intervals along the outer peripheral surface of the insertion port, and a gap is formed between the fastening means and the end face of the receiving port, thereby propelling the ground. Even after the force transmission device is mounted on the insertion opening of the trailing pipe, the state of fitting of the rubber ring can be confirmed by the check gauge, so that the mounting operation of the thrust transmission device can be performed on the ground. As a result, the work of attaching the propulsion transmission device and the work of fitting the insertion hole into the underground receptacle can be performed separately, so that the attachment of the propulsion transmission device to the insertion openings of multiple trailing pipes on the ground can be performed. I can do it. As a result, the overall work time required for pipe joining is reduced. In particular, the work time underground is greatly reduced.

  Further, according to the present invention, the mounting work of the propulsion transmission device underground takes time because the working space is small, but the mounting work of the propulsion transmission device can be performed on the ground, so that the mounting work of the propulsion transmission device underground can be performed underground. All you have to do is insert the slot and check it with a check gauge. As a result, the overall work time required for pipe joining is reduced. In particular, the work time underground is greatly reduced.

  Further, according to the present invention, by not attaching the support member for supporting the trailing pipe in the sheath to the fastener of the fastening means, the fixing force of the fastening means to the insertion port is reduced by the weight of the preceding pipe and the pipe propulsion resistance. There is no danger of lowering.

It is a partial cross-sectional perspective view which shows the pipe joint part which mounted the propulsion force transmission device for the earthquake-resistant pipe propulsion laying method of this invention. It is another partial sectional perspective view which shows the pipe joint part which mounted the propulsion force transmission device for seismic-resistant pipe propulsion laying construction methods of this invention. 1 is a partial cross-sectional view showing a pipe joint to which a propulsion force transmission device for an earthquake-resistant pipe propulsion laying method of the present invention is attached. FIG. 3 is an exploded perspective view showing a fastening means and a propulsion force transmission means in the propulsion force transmission device for a seismic pipe propulsion laying method of the present invention. It is a longitudinal cross-sectional view which shows the pipe joint part in which the propulsion force transmission device for the earthquake-resistant pipe propulsion laying method of this invention was mounted in the sheath pipe. It is a fragmentary sectional view showing the pipe joint where the insertion mouth was inserted in the receiving mouth by the conventional propulsion laying method. FIG. 7 is a sectional view taken along line AA of FIG. 6. It is a top view showing a check gauge. It is sectional drawing which shows the confirmation method of the insertion state of a rubber ring by a check gauge.

  Next, an embodiment of a thrust transmission device for a seismic pipe propulsion laying method of the present invention will be described with reference to the drawings.

  FIG. 1 is a partial cross-sectional perspective view showing a pipe joint to which a seismic pipe propulsion laying method of the present invention is mounted, and FIG. 2 is a seismic pipe propulsion laying method of the present invention. FIG. 3 is another partial cross-sectional perspective view showing a pipe joint, FIG. 3 is a partial cross-sectional view showing a pipe joint equipped with a thrust transmitting device for an earthquake-resistant pipe propulsion laying method of the present invention, and FIG. FIG. 5 is an exploded perspective view showing a fastening means and a thrust transmitting means in the thrust transmitting apparatus for pipe propulsion laying method, and FIG. 5 is a pipe joint in a sheath tube to which the thrust transmitting apparatus for seismic pipe propulsion laying method of the present invention is mounted. It is a longitudinal cross-sectional view which shows a part.

  1 to 5, reference numeral 1 denotes a receiving port of the preceding pipe 2, 3 denotes an insertion port of the trailing pipe 5 having a retaining projection 4 formed at a distal end portion, and 6 denotes an inner peripheral surface of the receiving port 1. A lock ring 9 fitted in the formed lock ring groove 7 via a centering ring 8 is a rubber ring fitted in a rubber ring groove 10 formed in the inner peripheral surface of the receptacle 1. , 11 are propulsion force transmission devices of the present invention.

  The propulsion force transmission device 11 of the present invention includes a ring-shaped fastening means 12 attached to the outer peripheral surface of the insertion port 3 and a plurality of (in this example, spaced apart along the outer peripheral surface of the insertion port 3) (Three) thrust transmitting means 13.

  The fastening means 12 includes a single band 14, a bolt 15 as a fastening tool for fastening the band 14, and a nut 16. The bolts 15 are passed through both ends of the band 14, and the band 14 is tightened by tightening a nut 16 screwed to the bolt 15. In addition, the fastening means 12 may be one in which a plurality of bands 14 are connected in a ring shape by bolts 15 and nuts 16 as fastening tools.

  The propulsion force transmission means 13 is sandwiched between a wheel 19 as a support member for supporting the trailing pipe 5 in the sheath pipe 18 (see FIG. 5), the insertion opening 3 and the fastening means 12, and an end face of the receiving port 1. 1a.

  The fixing member 20 includes a fixing portion 20a curved along the outer peripheral surface of the insertion opening 3 and a mounting portion 20b extending from the fixing portion 20a toward the distal end of the insertion opening 3, and the fixing portion 20a is fastened to the insertion opening 3. The abutment portion 17 and the wheel 19 which are sandwiched between the means 12 and the abutment 1 and are in contact with the end surface of the receptacle 1 are provided in the attachment portion 20b. Thereby, a gap (T1) for inserting the check gauge 48 (see FIG. 3) is formed between the fastening means 12 and the end face 1a of the receptacle 1.

  As described above, since the wheel 19 is not mounted around the bolt 15 of the fastening means 12, the weight of the preceding pipe 2 and the pipe propulsion resistance do not act on the bolt 15. As a result, there is no possibility that the fixing force of the fastening means 12 to the insertion opening 3 is reduced.

  Next, a method for laying an earthquake-resistant pipe propulsion using the thrust transmission device 11 of the present invention will be described.

  In order to join the pipes by the seismic pipe propulsion laying method using the propulsion transmission device 11 of the present invention, the propulsion transmission device 11 is fixed to the insertion opening 3 of the trailing pipe 5 on the ground. That is, the band 14 of the fastening means 12 is attached to the insertion port 3 while the fixing portion 20a of the fixing member 20 of the propulsion force transmission means 13 is inserted between the insertion port 3 and the fastening means 12, and the bolt 15 and the nut 16 to secure the propulsion force transmission device 11 to the insertion opening 3.

  The fixed position of the thrust transmitting device 11 is a position where the pipe joint between the leading tube 2 and the trailing tube 5 can expand and contract when the insertion port 3 is fitted into the receiving port 1. The contact portion 17 is located at a position where the contact portion 17 contacts the end surface 1 a of the receptacle 1.

  After the propulsion force transmitting device 11 is fixed to the insertion port 3 of the trailing pipe 5 on the ground in this way, the trailing pipe 5 is hung underground and fitted into the receptacle 1 of the preceding pipe 2. Thereby, the leading pipe 2 and the trailing pipe 5 are joined to the pipe joint while maintaining the shrinkage allowance T2 (see FIG. 3).

  After joining the leading pipe 2 and the trailing pipe 5 in this manner, the check gauge 48 (see FIG. 8) is inserted into the receiving port 1 from the gap (T1) between the fastening means 12 and the end face 1a of the receiving port 1. After insertion, it is determined whether or not the rubber ring 9 is at a correct position (see FIG. 1).

  In this manner, the check gauge 48 can be inserted all the way around the receptacle 1 until it reaches the rubber ring 9, so that the check gauge 48 can reliably confirm the fitted state of the rubber ring 9.

  As described above, since the mounting operation of the propulsion transmission device 11 can be performed on the ground, the mounting operation of the propulsion transmission device 11 and the operation of fitting the insertion port 3 into the receptacle 1 underground can be performed separately. As a result, the propulsion force transmission device 11 can be mounted on the insertion port 3 of the plurality of trailing pipes 5 on the ground, so that the entire operation time required for pipe joining is reduced. In particular, the work time underground is greatly reduced.

  Further, the mounting work of the propulsion transmission device 11 underground takes time because the working space is small, but the mounting work of the propulsion transmission device 11 can be performed on the ground. All that is required is the work of fitting in and checking with the check gauge 48. As a result, the overall work time required for pipe joining is reduced. In particular, the work time underground is greatly reduced.

  According to the earthquake-resistant pipe propulsion laying method using the propulsion transmission device 11 of the present invention, the propulsive force of the trailing pipe 5 at the time of pipe joining is fixed to the insertion port 3 of the trailing pipe 5 by the fastening means 12. The driving force can be transmitted to the leading pipe 2 via the driving force transmission device 11. That is, when the contact portion 17 of the thrust transmitting means 13 contacts the end face 1 a of the receptacle 1, it can be transmitted to the preceding pipe 2.

  On the other hand, when an excessive pushing force exceeding the fastening force of the fastening means 12 acts on the pipe joint due to an earthquake or the like, slippage occurs between the insertion port 3 and the fixed part 20a of the propulsion force transmission means 13, and The joint contracts by the contraction allowance T2 (see FIG. 3). Note that a part of the fixing member 20 may be contracted or contracted by the contraction allowance T2 by breaking or deforming the fixing member 20 by an excessive pushing force.

  When an excessive pulling force is applied to the pipe joint, the pipe joint extends until the retaining projection 4 of the insertion port 3 comes into contact with the lock ring 6. In FIG. 3, the extension of the pipe joint is indicated by T3.

  In addition, in the earthquake-resistant pipe propulsion laying method using the propulsion transmission device 11 of the present invention, even if there is no work space on the ground due to construction work, the propulsion transmission device 11 underground can be installed by the same operation as the conventional method. Wearing is also possible.

  As described above, according to the present invention, a plurality of propulsion force transmitting means 13 are arranged at intervals along the outer peripheral surface of the insertion port 3, and a gap is provided between the fastening means 12 and the end face of the receiving port 1. By forming (T1), the fitted state of the rubber ring 9 can be confirmed by the check gauge 48 even after the propulsion force transmission device 11 is mounted on the insertion port 3 of the trailing pipe 5 on the ground. Therefore, mounting work of the propulsion force transmission device 11 can be performed on the ground. Thus, the work of mounting the propulsion transmission device 11 and the work of fitting the insertion port 3 into the receptacle 1 underground can be performed separately, so that the propulsion force of the plurality of trailing pipes 5 to the insertion port 3 on the ground can be performed. The transmission device 11 can be mounted. As a result, the overall work time required for pipe joining is reduced. In particular, the work time underground is greatly reduced.

  Further, according to the present invention, the mounting work of the propulsion transmission device 11 underground takes time because the working space is small, but the mounting work of the propulsion transmission device 11 can be performed on the ground. All that is required is the work of fitting the insertion opening 3 into the slot 1 and the work of checking with the check gauge 48. As a result, the overall work time required for pipe joining is reduced. In particular, the work time underground is greatly reduced.

  Further, according to the present invention, the wheel 19 as a support member for supporting the trailing pipe 5 in the sheath 18 is not attached to the bolt 15 as a fastener of the fastening means 12, so that the fastening means to the insertion opening 3 is not provided. There is no possibility that the fixing force of the pipe 12 will be reduced by the weight of the preceding pipe 2 or the resistance of the pipe propulsion.

1: Receiving port 1a: End face 2: Leading pipe 3: Insertion hole 4: Retaining protrusion 5: Trailing pipe 6: Lock ring 7: Lock ring groove 8: Centering ring 9: Rubber ring 10: Rubber ring Groove 11: Propulsion force transmission device of the present invention 12: Tightening means 13: Propulsion force transmission means 14: Band 15: Bolt 16: Nut 17: Contact portion 18: Sheath tube 19: Wheel 20: Fixing member 20a: Fixing portion 20b : Mounting part 31: Receiving port 32: Leading pipe 33: Insertion opening 34: Retaining projection 35: Trailing pipe 36: Lock ring 37: Lock ring groove 38: Centering ring 39: Rubber ring 40: Rubber ring Groove 41: Propulsion transmission device 42: Protective ring 43: Sheath tube 44: Wheel 45: Bolt 46: Flange 47: Thrust transmission member 48: Check gauge

Claims (7)

The propulsion force used in the seismic pipe propulsion laying method, in which the pipes joined by fitting the insertion pipes of the following pipes into the receptacles of the preceding pipes are sequentially inserted into the pods and the new pipes are laid in the pods. In the transmission device,
A plurality of thrust transmitting means arranged at intervals along the outer peripheral surface of the insertion port, and a ring-shaped fastening means for fixing the thrust transmitting means to the outer peripheral surface of the insertion port, The thrust transmitting means includes a support member for supporting the trailing pipe in the sheath tube, and a fixing member which abuts on an end face of the receptacle and is interposed between the insertion port and the fastening means. A gap is formed between the means and the end face of the receptacle, and by tightening the fastening means and pressing the fixing member against the outer peripheral surface of the insertion port, the propulsion force transmitting means is configured to A thrust transmission device for an earthquake-resistant pipe propulsion laying method, which is fixed to an outer peripheral surface.   The thrust transmission device for a seismic pipe propulsion laying method according to claim 1, wherein the fastening means comprises a single band and a fastening tool for fastening the band.   The thrust transmitting device for a seismic pipe propulsion laying method according to claim 1, wherein the tightening means includes a plurality of bands and a tightening tool for tightening the bands.   The thrust according to claim 2 or 3, wherein the fastener comprises a bolt passed between the ends of the band, and a nut screwed into the bolt. Transmission device.   5. The thrust transmission device according to claim 1, wherein the number of the propulsion transmission means is two or more. 6.   The fixing member includes a fixing portion curved along an outer peripheral surface of the insertion opening, and a mounting portion extending from the fixing portion toward the distal end of the insertion opening. The fixing portion includes the insertion opening and the fastening means. The thrust transmission device for a seismic pipe propulsion laying method according to any one of claims 1 to 5, wherein the support member is provided at the attachment portion between the propulsion force and the support member.   The thrust transmission device for a seismic pipe propulsion laying method according to any one of claims 1 to 6, wherein the support member comprises a wheel.

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