JP7199275B2 - Propulsion force transmission device for seismic pipe propulsion installation method - Google Patents

Description

The present invention provides a propulsion force transmission device for an earthquake-resistant pipe jacking construction method, in particular, the propulsion force transmission device can be mounted on the spigot of a trailing pipe on the ground, and even after the propulsion force transmission device is mounted. The present invention relates to a propulsion force transmission device for earthquake-resistant pipe propulsion installation method, which has the effect of being able to confirm the fitting state of a rubber ring with a check gauge.

In recent years, there have been fewer problems such as traffic obstructions due to road construction and disposal of excavated soil, and moreover, pipes can be laid even in places where excavation work cannot be performed, such as under tracks. It is

Patent document 1 discloses an example of sheath tube type seismic pipe promotion construction method. Hereinafter, this sheath pipe type seismic pipe jacking construction method will be referred to as the conventional jacking construction method, and will be described with reference to the drawings.
FIG. 12 is a partial cross-sectional view showing a joint where an insertion port is inserted into a receptacle by a conventional jacking and laying method, FIG. 13 is a cross-sectional view along the line AA of FIG. 12, and FIG. 14 is a plan view showing a check gauge. 15 is a cross-sectional view showing a method for checking the inserted state of the rubber ring using a check gauge.

12 to 15, 31 is a receiving port for the leading pipe 32, 33 is an insertion port for the trailing pipe 35 having a projection 34 formed at its tip, and 36 is the inner peripheral surface of the receiving port 31. A lock ring 39 is fitted in a lock ring groove 37 formed through a centering ring 38, and a rubber ring 39 is fitted in a rubber ring groove 40 formed in the inner peripheral surface of the socket 31. , 41 are propulsion transmission devices.

The propulsion force transmission device 41 includes a protection ring 42 applied to the end face of the socket 31 to prevent grout material from entering the joint, and a wheel 44 fixed to the insertion port 33 and rolling in a sheath tube 43. and a ring-shaped thrust transmission member 47 interposed in the insertion opening 33 between the protection ring 42 and the flange 46 .

The thrust transmission member 47 is made of foamed resin such as polystyrene or polyurethane, and does not undergo plastic deformation with respect to the driving force of the trailing pipe when pipes are joined, thereby transmitting the driving force to the leading pipe. It has the function of plastically deforming against an excessive pushing force due to an earthquake or the like, thereby allowing the contraction of the joint and preventing the pipe from breaking.

In order to join the pipes by the conventional propulsion laying method, the protective ring 42 and the thrust transmission member 47 of the propulsion transmission device 41 are inserted into the insertion port 33 of the trailing pipe 35 in advance, and then the trailing pipe 35 is underground. and is fitted into the socket 31 of the leading pipe 32. Next, the flange 46 of the propulsion transmission device 41 is temporarily tightened to the insertion port 33 with bolts 45, the thrust transmission member 47 is brought into close contact with the end surface of the socket 1 via the protection ring 42, and the flange 46 is secured with the bolts 45. Tighten.

In this manner, the leading pipe 32 and the trailing pipe 35 are joined while maintaining the contraction allowance T (see FIG. 12) at the joint.

JP-A-2002-295723

According to the above-described conventional propulsion laying method, the thrust transmission member 47 does not undergo plastic deformation with respect to the propulsion force of the trailing pipe 35 at the time of pipe joining, so the propulsion force can be transmitted to the leading pipe 32 .

On the other hand, the thrust transmission member 47 is plastically deformed by an excessive pushing force due to an earthquake or the like, and as a result, contraction of the joint portion becomes possible. 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 in the rubber ring groove 40 . If there is any misalignment, there is a risk that the water stopping effect at the joint may be impaired. Therefore, it is important to check whether the rubber ring 39 is correctly fitted in the rubber ring groove 40 after the insertion opening 33 is fitted into the socket 31 .

After fitting the insertion port 33 into the receiving port 31, a dedicated check gauge 48 as shown in FIG. done using. That is, as shown in FIG. 15, the check gauge 48 is inserted from the socket 31 along the insertion slot 33, and the insertion length b (see FIG. 15) to the end face of the socket 31 ensures that the rubber ring 39 is in the correct position. or not.

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

As a result, in the conventional propulsion installation method, the propulsion force transmission device 41 must be installed after the trailing pipe 35 is suspended underground and the insertion port 33 of the trailing pipe 35 is fitted into the socket 31 of the leading pipe 32. , could not be attached to the insertion port 33.

If the installation work of the propulsion transmission device 41 can be performed on the ground, the installation work of 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 of being able to attach the propulsive force transmission device 41 to the insertion port 33 of the trailing pipe 35, the overall working time required for pipe joining is shortened. In particular, the working time to be carried out underground is greatly shortened.

In addition, it takes time to install the propulsive force transmission device 41 underground because the work space is narrow. Since only the fitting work and the checking work with the check gauge 48 are required, the overall working time required for pipe joining is shortened. In particular, the working time to be carried out underground is greatly shortened.

In addition, according to the conventional jacking installation method, the wheels 44 that roll inside the sheath pipe 43 are attached around the bolts 45 that connect the flanges 46 in a ring shape. As a result of the resistance acting on the bolt 45, the tightening force of the bolt 45 is affected, and there is a possibility that the fixing force of the flange 46 to the insertion opening 33 is reduced.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to enable a propulsion transmission device to be attached to a trailing pipe insertion port on the ground, and to provide a check gauge for checking the fitting state of a rubber ring even after the propulsion transmission device has been attached. As a result, it is possible to shorten the work time required for pipe joining, and there is no risk that the fixing force of the tightening means to the spigot will be reduced due to the weight of the preceding pipe and the pipe propulsion resistance. An object of the present invention is to provide a propulsion force transmission device for a jacking laying method.

The present invention has been made to achieve the above objects, and is characterized by the following.

In the invention according to claim 1, the pipes joined by fitting the insertion port of the trailing pipe into the socket of the leading pipe are pushed into the sheath pipe one by one, and a new pipe is laid in the sheath pipe. In the propulsion force transmission device used in the laying method, a plurality of propulsion force transmission means arranged at intervals along the outer peripheral surface of the insertion opening, and a ring-shaped propulsion force transmission means fixed to the outer peripheral surface of the insertion opening The thrust force transmission means includes a thrust force transmission member that abuts on the end face of the socket and transmits the pushing force of the trailing pipe to the leading pipe, and a bracket fixed to the tightening means. a support member for supporting the trailing pipe in the sheath pipe; and a support member for mounting the support member between the propulsive force transmission member and the bracket, one end of which is attached to the bracket and the other end of which is the propulsive force. It consists of a fixed shaft that is inserted into a long hole formed in the transmission member and fastened by a nut, and resists the frictional force generated by tightening the nut when an excessive pushing force acts on the propulsion transmission member. The driving force transmission member moves along the long hole, and a gap is formed between the tightening means and the end face of the socket.

The invention according to claim 2 is characterized in that, in the invention according to claim 1, the tightening means comprises one band and a tightening tool for tightening the band.

The invention according to claim 3 is characterized in that, in the invention according to claim 1, the tightening means comprises a plurality of bands and a tightening tool for tightening the bands.

The invention according to claim 4 is the invention according to claim 2 or 3, wherein the fastener comprises a bolt passed between the ends of the band and a nut screwed onto the bolt. It has characteristics.

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

The invention according to claim 6 is characterized in that, in the invention according to any one of claims 1 to 5, the support members are wheels.

The invention according to claim 7 is the invention according to any one of claims 1 to 6, wherein the tip of the propulsive force transmission member is bent so as to come into contact with the end face of the socket. It has characteristics.

According to this invention, a plurality of propulsion force transmission means are arranged at intervals along the outer peripheral surface of the receptacle, and a gap is formed between the tightening means and the end surface of the receptacle, thereby propulsion on the ground is achieved. Even after the force transmission device is attached to the insertion port of the trailing pipe, the fitting state of the rubber ring can be confirmed by the check gauge, so that the propulsion force transmission device can be attached on the ground. As a result, the work of installing the propulsion transmission device and the work of fitting the insertion port into the socket on the ground can be performed separately, so it is possible to install the propulsion transmission device on the insertion port of multiple trailing pipes on the ground. can do As a result, the overall working time required for pipe joining is shortened. In particular, the working time to be carried out underground is greatly shortened.

Further, according to the present invention, it takes time to install the propulsion transmission device underground because the work space is narrow. Only work for fitting the insertion port and confirmation work with a check gauge is required. As a result, the overall working time required for pipe joining is shortened. In particular, the working time to be carried out underground is greatly shortened.

Further, according to the present invention, by separating the tightening means and the thrust force transmission means, the force relationship between the fixing force by the tightening means and the frictional force of the thrust force transmission member in the thrust force transmission means can be determined in advance. Since it is possible to separate and set them, even if the tightening force of the band of the tightening means varies during work, the strength of the thrust force transmission member that receives the thrust force can be maintained constant.

In addition, according to the present invention, since the tightening bolt of the band of the tightening means is not coaxial with the wheel shaft of the wheel which is the support member, the problems of the coaxial case, namely, the weight of the tube and the propulsion resistance, are caused by the bolt. There is no problem of applying a load and affecting the fixing force to the tube. That is, by using separate shafts, it is possible to maintain the initial fixing force even if there is behavior during propulsion.

Further, according to the present invention, when an excessive pushing force acts on the thrust transmission member, the thrust transmission member moves along the elongated hole against the frictional force generated by tightening the nut. Since the opening is allowed to be displaced in the pushing direction, and the tightening means does not have a structure that slides on the insertion opening, there is no risk of damaging the outer peripheral surface of the tube.

Further, according to the present invention, since the wheels as support members are present immediately after the joint of the pipe, it is easy to cope with changes in the trajectory such as when the sheath pipe is curved, and follow-up performance is improved. In the conventional jacking installation method, there is a thrust transmission device (see Fig. 12) at the rear of the thrust transmission member, and wheels are installed on it. The followability of the trailing pipe to the leading pipe is poor.

Further, according to the present invention, since the diameter of the wheels can be increased by not providing the wheels on the outer surface of the band of the propulsion transmission device, the rolling friction resistance of the wheels can be reduced accordingly. Advantageous for propulsion transmission.

1 is a partially cross-sectional perspective view showing a pipe joint to which a propulsion force transmission device for earthquake-resistant pipe propulsion laying construction method according to the present invention is mounted; FIG. FIG. 10 is another partial cross-sectional perspective view showing a pipe joint to which the propulsion force transmission device for the seismic pipe jacking installation method of the present invention is mounted; 1 is a cross-sectional view showing a pipe joint to which a propulsion force transmission device for earthquake-resistant pipe propulsion laying construction method according to the present invention is mounted; FIG. 1 is a perspective view showing a propulsion force transmission device for an earthquake-resistant pipe propulsion installation method according to the present invention; FIG. 1 is a partially cross-sectional perspective view showing a propulsion force transmission device for an earthquake-resistant pipe propulsion installation method according to the present invention; FIG. 1 is a partial cross-sectional view showing a propulsion force transmission device for an earthquake-resistant pipe propulsion installation method according to the present invention; FIG. FIG. 2 is a perspective view showing a pipe joint in a sheath pipe to which the propulsion force transmission device for the seismic pipe jacking construction method of the present invention is mounted; FIG. 2 is a perspective view showing a thrust transmission member in the thrust transmission device for earthquake-resistant pipe thrust laying construction method of the present invention; FIG. 4 is a cross-sectional view showing a state of movement of the thrust transmission member when an excessive pushing force acts on the thrust transmission member, where (a) shows the state before the movement of the thrust transmission member, and (b) shows the state before the movement of the thrust transmission member; , shows the state during movement of the thrust transmission member, and (c) shows the state of completion of the movement of the thrust transmission member. FIG. 11 is a partial perspective view showing another propulsive force transmission means; FIG. 11 is a partial perspective view showing still another propulsive force transmission means; FIG. 10 is a partial cross-sectional view showing a pipe joint in which a spigot is inserted into a receptacle by a conventional jacking construction method; FIG. 13 is a cross-sectional view taken along line AA of FIG. 12; It is a top view which shows a check gauge. FIG. 5 is a cross-sectional view showing a method of confirming an inserted state of a rubber ring using a check gauge;

Next, one embodiment of the propulsion force transmission device for earthquake-resistant pipe propulsion installation 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 the thrust transmission device for earthquake-resistant pipe jacking-laying method of the present invention is attached, and FIG. Another partial cross-sectional perspective view showing a pipe joint, FIG. 3 is a cross-sectional view showing a pipe joint equipped with a propulsion force transmission device for an earthquake-resistant pipe jacking installation method of the present invention, and FIG. 4 is an earthquake-resistant pipe of the present invention. Fig. 5 is a perspective view showing a thrust transmission device for the jacking-laying method of the present invention; Fig. 5 is a partial cross-sectional perspective view showing the thrust transmission device for the jacking-laying method of the earthquake-resistant pipe of the present invention; Fig. 7 is a perspective view showing a pipe joint in a sheath pipe to which the thrust transmission device for the seismic pipe jacking construction method of the present invention is mounted; Fig. 8 is a seismic resistance of the present invention; FIG. 3 is a perspective view showing a thrust transmission member in the thrust transmission device for the pipe jacking construction method;

1 to 8, 1 is a socket for the leading pipe 2, 3 is an insertion port for the trailing pipe 5 having a projection 4 for preventing removal at the tip, and 6 is the inner peripheral surface of the socket 1. The lock ring 9 is fitted in the formed lock ring groove 7 (see FIG. 3) via the centering ring 8, and the lock ring 9 is fitted into the rubber ring groove 10 (see FIG. 3) formed in the inner peripheral surface of the socket 1. 3), a rubber ring 11 fitted therein is the propulsion force transmission device of the present invention.

The propulsive force transmission device 11 of the present invention includes a ring-shaped tightening means 12 mounted on the outer peripheral surface of the insertion port 3 and a plurality of (in this example, 3) propulsion force transmission means 13.

The tightening means 12 is composed of one band 14 and bolts 15 and nuts 16 as tightening tools for tightening the band 14 . A bolt 15 is passed through both ends of the band 14, and the band 14 is tightened by tightening a nut 16 screwed onto the bolt 15. As shown in FIG. The tightening means 12 may be formed by connecting a plurality of bands 14 to each other in a ring shape using bolts 15 and nuts 16 as tightening tools.

The thrust transmission means 13 includes a thrust transmission member 17 that contacts the end surface 1a of the socket 1 and transmits the pushing force of the trailing pipe 5 to the leading pipe 2, a bracket 18 fixed to the outer surface of the tightening means 12, It consists of a wheel 20 as a support member for supporting the trailing pipe 5 in the sheath pipe 19 (see FIG. 7) and a fixed shaft 21 rotatably mounting the wheel 20 between the bracket 18 and the propulsion force transmission member 17. ing. The tip of the propulsive force transmission member 17 is bent at a right angle so as to abut on the end face 1a of the socket 1. As shown in FIG.

The fixed shaft 21 is made of a bolt, passes through the wheel 20 through a bolt hole 18a formed in the bracket 18, and is pulled out from one end of a long hole 17a formed in the propulsive force transmission member 17 by screwing a nut 22 thereon. inserted incorrectly.

The diameter of the tip portion of the fixed shaft 21 inserted into the long hole 17a is smaller than the other portion, and a step 21a is formed (see FIG. 5). As a result, when the thrust transmission member 17 is tightened by the nut 22 , there is a gap between the step 21 a of the fixed shaft 21 and the inner surface of the thrust transmission member 17 and between the outer surface of the thrust transmission member 17 and the inner surface of the nut 22 . Frictional force is generated in If this frictional force is adjusted by the tightening force of the nut 22, the propulsive force is transmitted to the leading pipe 2, and if an excessive pushing force acts on the propulsive force transmitting member 17, the propulsive force transmitting member 17 will not move to the bracket 18. On the other hand, it becomes possible to retreat by the length of the long hole 17a.

By configuring the propulsive force transmission means 13 as described above, a gap (T1) (see FIG. 3) for inserting the check gauge 48 is formed between the tightening means 12 and the end face 1a of the socket 1. be.

Further, since the wheels 20 are not attached around the bolts 15 of the tightening means 12, the weight of the leading pipe 2 and the pipe propulsion resistance do not act on the bolts 15. As a result, there is no possibility that the fixing force of the tightening means 12 to the insertion opening 3 will be lowered. That is, by using separate shafts, it is possible to maintain the initial fixing force even if there is behavior during propulsion.

Next, an earthquake-resistant pipe propulsion construction method using the propulsion force transmission device 11 of the present invention will be described.

In order to join pipes by the seismic pipe propulsion laying method using the thrust transmission device 11 of the present invention, the thrust transmission device 11 is fixed to the spigot 3 of the trailing pipe 5 on the ground. That is, the band 14 of the tightening means 12 is tightened with the bolt 15 and the nut 16 to fix the propulsive force transmission device 11 to the insertion port 3 .

The fixed position of the propulsive force transmission device 11 is a position where the pipe joint between the leading pipe 2 and the trailing pipe 5 can be expanded and contracted when the insertion port 3 is fitted into the receptacle 1 . The tip is positioned so as to abut on the end surface 1a of the socket 1 .

After the propulsive force transmission device 11 is fixed to the insertion port 3 of the trailing pipe 5 on the ground in this manner, the trailing pipe 5 is suspended underground and fitted into the socket 1 of the leading pipe 2 . As a result, the leading pipe 2 and the trailing pipe 5 are joined while maintaining the contraction margin T2 (see FIG. 3) at the pipe joint.

After the leading pipe 2 and the trailing pipe 5 are joined in this way, the check gauge 48 (see FIG. 14) is set to the gap (T1) between the tightening means 12 and the end face 1a of the socket 1 (see FIG. 3). 1 into socket 1 to determine whether rubber ring 9 is in the correct position (see FIG. 1).

In this way, the check gauge 48 can be inserted over the entire circumference of the socket 1 until it reaches the rubber ring 9, so that the fitting state of the rubber ring 9 can be reliably confirmed by the check gauge 48. - 特許庁

In this manner, since the installation work of the propulsion transmission device 11 can be performed on the ground, the installation work of the propulsion transmission device 11 and the work of fitting the insertion port 3 into the receptacle 1 underground can be performed separately. As a result, since the propulsive force transmission device 11 can be attached to the insertion openings 3 of the plurality of trailing pipes 5 on the ground, the total working time required for pipe joining can be shortened. In particular, the working time to be carried out underground is greatly shortened.

In addition, although it takes time to install the propulsion transmission device 11 underground because the work space is narrow, the installation work of the propulsion transmission device 11 can be performed on the ground. Only the fitting work and the checking work with the check gauge 48 are required. As a result, the overall working time required for pipe joining is shortened. In particular, the working time to be carried out underground is greatly shortened.

According to the earthquake-resistant pipe promotion laying method using the propulsion force transmission device 11 of the present invention, the propulsive force of the trailing pipe 5 when laying the pipe in the sheath pipe 19 is applied to the insertion port 3 of the trailing pipe 5 as follows: It can be transmitted to the leading pipe 2 by means of a thrust transmission member 17 attached via the clamping means 12 . That is, as shown in FIG. 9( a ), the propulsive force transmission member 17 contacts the end surface 1 a of the socket 1 , so that the propulsive force can be transmitted to the leading pipe 2 .

On the other hand, when an excessive pushing force exceeding the propulsive force of the pipe acts on the pipe joint due to an earthquake or the like, the propulsive force transmission member 17 retreats by the length of the long hole 17a. As a result, the pipe joint shrinks by the shrinkage margin T2 (see FIG. 3).

Further, when an excessive tensile force acts on 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 portion is indicated by T3.

It should be noted that in the seismic pipe promotion construction method using the propulsion transmission device 11 of the present invention, even if there is no work space above ground due to construction work, the propulsion transmission device 11 can be installed underground by the same work as the conventional construction method. Mounting is also possible.

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

In addition, according to the present invention, it takes time to install the propulsion transmission device 11 underground because the work space is narrow, but the installation work of the propulsion transmission device 11 can be performed above ground, so that the installation work can be performed underground. Only fitting work of the insertion port 3 into 1 and confirmation work by the check gauge 48 are sufficient. As a result, the overall working time required for pipe joining is shortened. In particular, the working time to be carried out underground is greatly shortened.

Further, according to the present invention, by separating the tightening means 12 and the thrust force transmission means 13 from each other, the fixing force by the tightening means 12 and the frictional force of the thrust force transmission member 17 in the thrust force transmission means 13 are combined. Since the force relationship can be separately set in advance, even if the tightening force of the band 14 of the tightening means 12 varies during work, a constant driving force can be maintained.

In addition, according to the present invention, since the tightening bolt 15 of the band 14 of the tightening means 12 is not coaxial with the axis of the wheel 20, the problem of coaxiality, that is, the weight of the tube and the propulsion resistance, causes the load on the bolt. There are no problems such as hanging and affecting the fixing force to the pipe. That is, by using separate shafts, it is possible to maintain the initial fixing force even if there is behavior during propulsion.

Further, according to the present invention, when an excessive pushing force acts on the thrust transmission member 17, the thrust transmission member moves along the long hole against the frictional force generated by tightening the nut. Since the insertion port 3 is allowed to be displaced in the pushing direction, and the tightening means 12 does not have a structure that slides on the insertion port 3, there is no risk of damaging the outer peripheral surface of the pipe.

Further, according to the present invention, since the wheels 20 as support members are present immediately after the pipe joint portion, it is easy to cope with changes in the trajectory and follow-up performance is improved.

Further, according to the present invention, since the diameter of the wheels 20 can be increased by not providing the wheels 20 on the outer surface of the band 14 of the propulsion transmission device 11, the rolling friction resistance of the wheels 20 can be reduced accordingly. can be used, which is advantageous for propulsion transmission.

As shown in FIG. 10, the bracket 18 and the propulsive force transmission member 17 may be tightened with another bolt 23 and nut 24 to adjust the frictional force.

Further, as shown in FIG. 11, the wheel 20 is rotatably attached to the fixed shaft 25, the fixed shaft 25 is formed with an internal thread, and the bolt 26 is inserted through the long hole 17a of the propulsive force transmission member 17 to fix it. The frictional force may be adjusted by screwing it into the internal threads of the shaft 25 .

1: Receptacle 1a: End face 2: Leading pipe 3: Insertion port 4: Retaining projection 5: Trailing pipe 6: Lock ring 7: Groove for lock ring
8: Centering Ring 9: Rubber Ring 10: Rubber Ring Groove 11: Thrust Transmission Device of the Present Invention 12: Tightening Means 13: Thrust Transmission Means 14: Band 15: Bolt 16: Nut 17: Thrust Transmission Member 17a: long hole 18: bracket 18a: bolt hole 19: sheath tube 20: wheel 21: fixed shaft 21a: step 22: nut 23: bolt 24: nut 25: fixed shaft 26: bolt 31: socket 32: leading pipe 33: Insertion Port 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: Protection Ring 43 : Sheath tube 44: Wheel 45: Bolt 46: Flange 47: Thrust transmission member 48: Check gauge

Claims (7)

Propulsion force transmission used in an earthquake-resistant pipe jacking construction method in which pipes joined by fitting the insertion port of the trailing pipe into the socket of the leading pipe are pushed into the sheath pipe one by one, and a new pipe is laid in the sheath pipe. in the device,
It comprises a plurality of propulsive force transmission means arranged at intervals along the outer peripheral surface of the receptacle, and a ring-shaped tightening means fixed to the outer peripheral surface of the receptacle, and the propulsive force transmission means is a thrust force transmitting member abutting against the end surface of the socket and transmitting the pushing force of the trailing pipe to the leading pipe; a bracket fixed to the tightening means; and supporting the trailing pipe within the sheath pipe. a support member, one end attached to the bracket and the other end inserted into an elongated hole formed in the thrust transmission member for mounting the support member between the thrust transmission member and the bracket; and a fixed shaft fastened by a nut, and when an excessive pushing force acts on the thrust transmission member, the thrust transmission member moves along the long hole against the frictional force generated by the tightening of the nut. and a gap is formed between the tightening means and the end surface of the socket. 2. The propulsion transmission device for seismic pipe jacking construction method according to claim 1, wherein said tightening means comprises a single band and a tightening tool for tightening said band. 2. The propulsion force transmission device for earthquake-resistant pipe jacking construction method according to claim 1, wherein said tightening means comprises a plurality of bands and a tightening tool for tightening said bands. 4. The propulsion force for seismic-resistant pipe jacking installation method according to claim 2 or 3, characterized in that said fastener comprises a bolt passed between the ends of said band and a nut screwed onto said bolt. transmission device. 5. The propulsion transmission device for earthquake-resistant pipe jacking construction method according to claim 1, wherein the number of the propulsion transmission means is two or more. 6. The propulsion force transmission device for earthquake-resistant pipe jacking construction method according to claim 1, wherein said support member comprises a wheel. 7. The propulsion force for seismic pipe installation method according to any one of claims 1 to 6, characterized in that the tip portion of said propulsion force transmission member is bent so as to come into contact with said end surface of said socket. transmission device.

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