JP3311069B2 - Propulsion method for multi-section piping - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for propelling multiple pipes laid by connecting and propelling subsequent pipes to a large number of pipes inserted into an underground horizontal shaft.

[0002]

2. Description of the Related Art In general, power transmission lines for power supply buried underground are usually provided with a multi-layered cable protection pipeline in a horizontal shaft formed in the ground, and a large number of cables are provided in each cable protection pipeline. After the cable is inserted, the space between the horizontal shaft and each cable protection tube is filled with a filler such as mortar.
A propulsion method is known as a method for laying multiple cable protection conduits in a horizontal shaft.

In a conventional propulsion method, a large-diameter propulsion pipe is pushed into a horizontal shaft by a pipe pressing device such as a jack while the horizontal shaft is formed underground by a cutter, and propelled into the horizontal shaft. A large number of cable protection tubes are inserted into the propulsion tube.

In such a propulsion method, when inserting a cable protection tube into a propulsion pipe, a bogie is installed for positioning the cable protection pipe in a vertical shaft communicating with a horizontal shaft, and each cable protection pipe is connected to each other. A pipe pillow that defines the gap between the two must be assembled. In addition, it is necessary to perform the connection work between the cable protection tubes, the operation of inserting each cable protection tube into the propulsion tube, and the like in the shaft. However, there is a problem that the inside of the shaft is small and workability is poor, and the work takes a long time.

On the other hand, a horizontal shaft is formed in advance, and a large number of cable protection tubes are mounted on a bogie on the ground in the same arrangement state as the piping state in the horizontal shaft, and a vertical shaft communicating with the horizontal shaft is formed. A method of connecting each cable protection tube of a succeeding bogie to each cable protection tube mounted on a preceding bogie and pulling the connected bogie into a horizontal shaft by a winch or the like has also been developed. "Electric Field Technology", 1992.7, Vol. 31, No. 362, pp. 59-62).

[0006]

Even with such a propulsion method, a large number of cable protection tubes loaded on each bogie must be connected to each other in a narrow shaft, resulting in poor workability. There is.

Further, a method has been proposed in which each bogie is inserted into a horizontal shaft and the respective cable protection tubes of each bogie are connected to each other in the horizontal shaft. In this case, each cable protection tube of the preceding truck and the cable protection tube of the following truck are
It is necessary to connect in a horizontal shaft that is narrower than the shaft, and it is necessary to precisely position the connected cable protection tubes. Furthermore, in order to connect the respective cable protection tubes in the horizontal shaft, the subsequent cable protection tube must be pushed in by the tube pressing device in the horizontal shaft, which again has a problem of poor workability.

The present invention has been made to solve such a problem, and an object of the present invention is to provide a method of propelling a multi-row pipe which can reliably connect pipes and is excellent in workability. It is in.

[0009]

According to the present invention, there is provided a method for propelling a multi-story pipe in which a multiplicity of preceding pipes are fitted and connected to a plurality of subsequent pipes, and are propelled into a horizontal shaft. A method of mounting a large number of pipes on each of a plurality of bogies, in a state similar to the pipe state in the horizontal shaft, and slidably in the axial direction; and A step of arranging a pipe pressing device for pressing one end face of the pipe in the axial direction to move the pipe in the axial direction, and a step of loading one of the carts into a pit communicating with the horizontal pit, Connecting a reaction plate, which abuts one end surface of each tube to prevent their sliding, to a bogie carried into the shaft, facing the end surface of each tube, and connecting the bogie to the reaction plate And the process of inserting it into the horizontal shaft with many pipes mounted in a predetermined state The carriage and a step of carrying in the pit,
A step of connecting the bogie newly introduced into the shaft with the bogie inserted into the horizontal shaft and the pipe pressing device arranged in the shaft, and integrating them, and the subsequent bogie by the pipe pressing device. A step of pressing each tube in the axial direction, fitting it to each tube on the preceding trolley, and connecting by pressing against the reaction force plate;
And the above object is achieved.

[0010] The multi-pipe propulsion method of the present invention is a multi-pipe pipe propulsion method in which a large number of preceding pipes are fitted and connected to a large number of subsequent pipes while being propelled into a horizontal shaft. A step of mounting a plurality of pipes on each of the plurality of bogies in a state similar to the pipe state in the horizontal shaft, and in a state where each pipe does not slide further with respect to the bogies by sliding in the axial direction, A step of arranging a pipe pressing device for pressing one end face of each pipe mounted on the bogie to move the pipe in the axial direction in the shaft, and loading one of the bogies into a shaft communicating with the horizontal shaft. And the step of inserting the bogie carried into the shaft so that each mounted pipe runs along the axial direction of the shaft, engaging a stopper around the open end of the shaft, and The bogie inserted into the horizontal shaft is engaged with the stopper, and this bogie is The step of not being inserted into the horizontal shaft, the step of newly loading another bogie with the pipe mounted in a predetermined state into the shaft, and the step of loading the bogie newly introduced into the shaft with this bogie Positioning each of the drawn pipes so as to be aligned with each of the pipes of the bogie inserted into the horizontal shaft, and pressing each of the pipes of the subsequent bogie by the pipe pressing device so that they are not inserted into the horizontal shaft. Fitting and connecting each of the non-sliding pipes on the preceding bogie to achieve the above object.

[0011]

According to the multi-pipe propulsion method of the present invention, the succeeding bogie is connected to the preceding bogie in the shaft while the preceding bogie is inserted into the horizontal shaft. Then, in a state where each tube mounted on the preceding bogie is in contact with a reaction force plate integrally connected to the tube pressing device via each bogie, each tube mounted on the subsequent bogie by the tube pressing device. Is pressed and fitted into each tube on the preceding carriage to be firmly connected.

Further, in the method for propelling a multi-section pipe according to the present invention,
In a state where the preceding bogie inserted into the horizontal shaft is prohibited from being inserted into the horizontal shaft by the stopper, each pipe on the bogie carried into the vertical shaft is pressed toward the preceding bogie by the pipe pressing device, It is fitted to each tube which is not slid on the preceding truck.

[0013]

Embodiments of the present invention will be described below with reference to the drawings.

The propulsion method of the present invention is implemented, for example, for laying multiple cable protection pipelines in a power transmission line in a horizontal shaft formed underground. In the propulsion method according to the present invention, a horizontal shaft in which multiple cable protection conduits are laid is formed in advance, and a vertical shaft communicating with each end of the horizontal shaft is also formed. Then, near the opening in the shaft, a number of cable protection tubes are mounted on the bogie in the same state as when laid in the horizontal shaft.

FIG. 1 shows a state in which a number of cable protection tubes are mounted on a truck on the ground. In the present embodiment, for example, nine cable protection tubes 10 are mounted on the carriage 20 in a state where three cables are arranged in each of the horizontal direction and the vertical direction. The carriage 20 includes a pair of tube end support members 21 and 21.
And four connecting rods 23 for connecting the respective tube end supporting members 21 at appropriate intervals.

FIG. 2 is a front view of one tube end supporting member 21. This pipe end supporting member 21 is provided for each cable protection pipe 10.
Support plate 21a for supporting the ends of the
And a bogie portion 21b that supports the lower portion of 1a in a vertical state. The bogie part 21b extends long in the width direction of the horizontal shaft 51 in which the cable protection tube 10 is laid.
A pair of wheels 21c are provided for rolling the inner peripheral surface of the horizontal shaft 51. The support plate 21a has a square shape in which each corner is cut out, and has three rows and three rows in a horizontal state.
It has three vertical and three horizontal rows of nine support holes 21d into which the respective ends of the nine cable protection tubes 10 are fitted.

The four connecting rods 23 for connecting the pipe end supporting members 21 to each other penetrate near the corners of the supporting plate 21a, and are fixed to the supporting plate 21a by, for example, nuts. Support plate 21a for each connecting rod 23
A thread groove 23a is provided on the outer peripheral surface of one end extending from the nut, and a nut member 23b is rotatably attached to the other end. Each connecting rod 23 is slightly longer than the cable protection tube 10 to be supported.

The truck 20 having such a structure is configured such that each pipe end supporting member 21 and all the connecting rods 23 are separated from each other.
The cable protection tube 10 may be carried to a site where the cable protection tube 10 is laid, and assembled at the site.

In the propulsion method of the present invention, a socket 31 is attached to one end of each cable protection tube 10 so that another cable protection tube 10 can be easily connected. As shown in FIG. 3A, the socket 31 has a cylindrical shape, and is sufficiently long in the axial direction so that the other cable protection tube 10 is inserted and securely connected. A seal member 32 is fitted to the outer peripheral surface at one end of the cable protection tube 10. This seal member 32 is adhered to the outer peripheral surface of the cable protection tube 10 with an adhesive,
One end of the socket 31 is fitted to the seal member 32 and is bonded by an adhesive. Then, the end of another cable protection tube 10 to be connected is inserted from the opening of the socket 31.

A cylindrical seal member 3 is provided on the inner peripheral surface of the open end of the socket 31 into which the other cable protection tube 10 is inserted.
3 is attached. The seal member 33 is provided with a flange portion 33a that comes into contact with the opening end surface of the socket 31, and protrudes on the inner peripheral surface in an inclined state inward and in the insertion direction of the other cable protection tube 10. Four annular ribs 33b are provided over the entire circumference.

At the open end of the socket 31, FIG.
As shown in FIG. 7, a guide member 34 for guiding another cable protection tube 10 inserted into the socket 31 is attached as required. The guide member 34 is connected to the socket 3
A cylindrical distal end extends beyond the open end of the socket 31 from a thin base end externally fitted to the open end of the socket 31.
The distal end extending from the open end of the socket 31 is flush with the inner peripheral surface of the seal member 33 covering the open end of the socket 31 and gradually becomes thinner toward the distal end. It has become.

The nine cable protection tubes 10 to which the sockets 31 are mounted are mounted on the carriage 20. Each cable protection tube 10 is provided with a support hole 2 of each support plate 21a of the carriage 20.
Each end is fitted in 1d and supported in a horizontal state. At this time, each of the cable protection tubes 10 has a nut 31 b of the connecting rod 23 on the side where the socket 31 is mounted.
It is mounted on the trolley 20 so as to be on the side. Each cable protection tube 10 is slidably supported in a support hole 21d of each support plate 21a of the carriage 20, but the socket 31 does not pass through the support hole 21d of each support plate 21a.
By each socket 31 contacting the support plate 21a,
Sliding of each cable protection tube 10 is prevented.

The truck 20 on which the nine cable protection tubes 10 are mounted is moved by a crane 60 as shown in FIG.
The shaft 5 communicating with the horizontal shaft where the cable protection pipe 10 is laid
It is carried into 2. At this time, each cable protection tube 10
Since each of the cable protection tubes 10 is slidable with respect to each of the supporting plates 21a on which the respective ends are supported, the cable protection tubes 10 can be lowered in the shaft 52 in a substantially horizontal state so as not to slide. . Then, the end face of each cable protection tube 10 to which the socket 31 is not attached is located in the shaft 52 such that the end surface faces the horizontal shaft in which the cable protection tube 10 is laid.

FIG. 5 shows a cable protection tube 1 in a horizontal shaft 51.
It is sectional drawing of the horizontal shaft 51 and the vertical shaft 52 which show the propulsion process of No. 0. In the vertical shaft 52, a tube pressing device 40 is disposed on a far side of the horizontal shaft 51 where the cable protection tube 10 is laid, so as to face the horizontal shaft 51. This pipe pressing device 4
Reference numeral 0 denotes an apparatus body 41 that moves a plurality of horizontal rods 41a in the horizontal direction by, for example, hydraulic pressure, a connecting plate 42 that is vertically attached to a distal end of each horizontal rod 41a of the apparatus body 41, and And a pressing plate 43 attached to a surface of the connecting plate 42 facing the horizontal shaft 51. The pressing plate 43 is provided with nine positioning recesses 43a in three vertical rows and three horizontal rows so that the sockets 31 of the respective cable protection tubes 10 mounted on the carriage 20 can be fitted on the opposing surface of the horizontal shaft 51. Have been. Connecting plate 42 and pressing plate 43
Has a square shape with each corner cut out.

The apparatus main body 41 of the tube pressing device 40 is provided with four connecting rods 44 that pass horizontally near the cut-off corners of the connecting plate 42 and the pressing plate 43. Each connecting rod 44 is provided corresponding to each connecting rod 23 in the bogie 20. At the tip of each connecting rod 44, a screw is attached to each nut member 23 b provided on each connecting rod 23 of the bogie 20. Screw groove 44 to be connected
a is provided.

A reaction force device 70 is attached to the bogie 20 lowered into the shaft 52 by the crane 60 so as to face the end of each of the mounted cable protection tubes 10 where the socket 31 is not mounted. This reaction force device 7
Numeral 0 has a bogie portion 71 provided with a pair of wheels 71a on each side similarly to the bogie portion 21b of the bogie 20. Then, a square reaction force plate 72 is provided on the carriage 71.
Are supported vertically. At each corner of the reaction force plate 72, a connecting rod 73 is attached in a horizontal state. Each connecting rod 73 is arranged corresponding to each connecting rod 23 of the truck 20. A nut member 74 that is screw-coupled to a screw groove 23 a provided at an end of the connecting rod 23 of the carriage 20 is rotatably attached to a tip end of each connecting rod 73 attached to the reaction force plate 72.

Cart 20 on which cable protection tube 10 is mounted
Is carried into the shaft 52, a nut member 74 attached to each connecting rod 73 of the reaction force device 70 is screw-coupled to the screw groove 23a of each connecting rod 23 of the bogie 20. The force device 70 is connected. Each connecting rod 73 of the reaction force device 70 is sufficiently short with respect to each connecting rod 23 of the bogie 20, and the bogie 2
In a state in which the reaction force device 70 is connected to 0, the socket 31 of each cable protection tube 10 does not abut the support plate 21 even if the end face of each cable protection tube 10 mounted on the carriage 20 abuts.

When the reaction force device 70 is connected to the carriage 20,
The bogie 20 is inserted into the horizontal shaft 51 with the reaction force device 70 at the top. When the reaction force device 70 and the bogie 20 are inserted into the horizontal shaft 51, the pulling wire attached to the bogie 71 of the reaction force device 70 is opposite to the end of the horizontal shaft 51 into which the reaction force device 70 and the like are carried. This is done by towing through the side end. When almost the entire bogie 20 is carried into the horizontal shaft 51, the insertion of the reaction force device 70 and the bogie 20 into the horizontal shaft 51 is stopped.

In such a state, the bogie 20 on which the nine cable protection tubes 10 are mounted on the ground is newly carried into the shaft 52. The carriage 20 newly introduced into the shaft 52 is mounted on each of the cable protection tubes 10.
Is arranged such that the socket 31 is on the tube pressing device 40 side. Then, the preceding bogie 20 carried into the horizontal shaft 51
The screw groove 23a of each connecting rod 23 in the subsequent bogie 20 carried into the shaft 52 is screw-connected to the nut member 23b of each connecting rod 23 in. Subsequently, the thread groove 44a of each connecting rod 44 of the pipe pressing device 40 is screwed to the nut member 23b of each connecting rod 23 of the subsequent bogie 20 in the shaft 52. Thereby, each connecting rod 44 of the pipe pressing device 40,
The connecting rods 23 of the succeeding bogie 20, the connecting rods 23 of the preceding bogie 20, and the connecting rods 73 of the reaction force device 70 are integrally connected.

In such a state, the pipe pressing device 40 is operated, and the connecting plate 42 and the pressing plate 43 are moved to the following bogie 2.
Move horizontally to approach zero. Then, the socket 31 of the cable protection tube 10 supported by the succeeding carriage 20 is provided in each positioning recess 43a of the pressing plate 43.
Is inserted. When the pressing plate 43 is further moved in the same direction, the pressing plate 43
1 is pressed against the carriage 20. This cart 20
Since the cable protection tubes 10 are fixed to the apparatus main body 41 by the connecting rods 44 and 23, each cable protection tube 10 slides with respect to the carriage 20, and each cable mounted on the preceding carriage 20. The protective tube 10 is fitted into the socket 31.

In such a state, the tube pressing device 40
Is driven to move the pressing plate 43 in the same direction, the leading bogie 20 is also moved through the succeeding bogie 20 by the tube pressing device 4.
0, so that the leading truck 2
The cable protection tubes 10 mounted on the trolley 20
Slide against And each cable protection tube 10
The end surface of the side opposite to the side on which the socket 31 is mounted abuts against the reaction force plate 72 of the reaction force device 70. After that,
When the pressing plate 43 is moved in the same direction, each cable mounted on the preceding bogie 20 is moved to the reaction force plate 72 of the reaction force device 70 fixed to the tube pressing device 40 through each bogie 20. The protection tubes 10 are pressed, and the ends of the respective cable protection tubes 10 mounted on the subsequent carriage 20 are pressed into the sockets 31 of the respective cable protection tubes 10. Thereby, each cable protection tube 10 in the preceding carriage 20
And the corresponding cable protection tubes 10 in the subsequent carriage 20 are connected.

In such a state, the tube pressing device 40
Is moved in the direction away from the carriage 20 to return to the initial state. Then, the subsequent truck 20
The connection state between the connection rods 23 and the connection rods 44 of the tube pressing device 40 is released. Then, the following truck 2
The leading bogie 20 and the reaction force device 70 are inserted into the horizontal shaft 51 in an integrated and connected state. And
The trolley 20, on which the nine cable protection tubes 10 are mounted, is newly loaded into the shaft 52, and the same operation as the above-described operation is repeated, so that the cable protection tube 10 supported by the trolley 20 becomes They are sequentially connected in the horizontal shaft 51. In this manner, when the cable protection tubes 10 are connected over the entire length of the horizontal shaft 51, each cable protection tube 1 is connected.
Filler is filled in the gap between 0 and the inner peripheral surface of the shaft 51, and 9
A cable protection conduit is laid underground.

FIG. 6 shows a bogie 29 used in another embodiment of the propulsion method according to the present invention. In the cart 29, the connecting rods 28 connect the support members 21 to each other, and slightly protrude from the support plates 21a. The other configuration is the same as the configuration of the truck 20 of the embodiment, and thus the same components are denoted by the same reference numerals and description thereof will be omitted.

FIG. 7 is a cross-sectional view of a horizontal shaft 51 and a vertical shaft 52 showing another embodiment of the propulsion method of the present invention using the bogie 29. FIG. 8 is a cross-sectional view taken along line AA of FIG. .
In this embodiment, the cart 2 on which the cable protection tube 10 is mounted
When 9 is carried into the shaft 52, it is inserted into the horizontal shaft 51. At this time, before the support plate 21a on the rear side of the bogie 29 is introduced into the horizontal shaft 51, the shaft 52 in the horizontal shaft 51
A pair of stoppers 80 and 8
0 is placed.

Each of the stoppers 80 is a vertical column whose end abuts on the periphery of the opening of the horizontal shaft 51 with the respective cable protection tubes 10 mounted on the carriage 29 introduced into the horizontal shaft 51 interposed therebetween. It has a portion 81 and a reaction force portion 82 attached to the column portion 81 such that the support plate 21a on the rear side of the bogie 29 abuts and is pressed. Each reaction force portion 82 includes a support portion 81
In contrast, the protrusion protrudes inward of the horizontal shaft 51, and reliably holds the force applied to the support plate 21 to be pressed.

When the respective stoppers 80 are arranged, the carriage 2
9 is again inserted into the horizontal shaft 51, and the support plate 21 a on the rear side is brought into contact with the reaction force portion 82 of the stopper 80.
In this state, a new bogie 29 on which nine cable protection tubes 10 are mounted is carried into the shaft 52, and the bogie 29 is connected to each cable protection tube 10 and the preceding bogie 2
9 are arranged so as to be aligned with the respective cable protection tubes 10.

Also in this embodiment, the pipe pressing device 40 used in the above embodiment is used by being arranged in a shaft 52. When the succeeding bogie 29 is disposed in a predetermined state in the shaft 52, the tube pressing device 40 is driven, and the socket 3 of each cable protection tube 10 in the subsequent bogie 29 is driven.
1 is fitted into the positioning recess 43 a of the pressing plate 43 of the pipe pressing device 40, and each cable protection tube 10 is pressed into the horizontal shaft 51. Then, each cable protection tube 10 of the succeeding truck 29 is slid with respect to the truck 29 and fitted into the socket 31 of the preceding truck 29.

Further, when the pressing plate 43 is driven, the end of the subsequent cable protection tube 10 is fitted into the socket 31 of the preceding cable protection tube 10 so that the socket 31 of each of the preceding cable tubes 10 is inserted. Presses the support plate 21a on the rear side of the preceding bogie 29. At this time, the support plate 21 a is in contact with the reaction force portions 82 of the stoppers 80, and the reaction force portions 82 are engaged around the opening of the horizontal shaft 51. Each cable protection tube 10 mounted on the preceding bogie 29 is prevented from sliding without entering the horizontal shaft 51. As a result, the end of each of the subsequent cable protection tubes 10 is inserted into each of the sockets 31 of the previous cable protection tube 10, and each of the preceding cable protection tubes 10 and each of the subsequent cable protection tubes 10 are securely connected. Linked to

When the respective cable protection tubes 10 of the succeeding bogie 29 are connected to the respective cable protection tubes 10 of the preceding bogie 29 in this manner, the respective stoppers 80 are removed from the vicinity of the opening of the horizontal shaft 51. Thus, both carts 29 are integrally pulled into the horizontal shaft 51. And the following trolley 29
Before the support plate 21a on the rear side in enters into the horizontal shaft 51, the stoppers 80 are engaged around the opening of the horizontal shaft 51, and the same operation as the above-described operation is repeated. A cable protection conduit is laid in the horizontal shaft 51.

[0040]

According to the multi-pipe piping propulsion method of the present invention, a large number of pipes are mounted on the bogie on the ground in a state similar to the state at the time of piping, and the mounted bogie is inserted into the horizontal shaft. In this state, since the pipes of the carriage carried into the shaft are fitted, work can be performed safely and efficiently even in a narrow shaft. In addition, since it is not necessary to work in a horizontal shaft that is narrower than the shaft, the safety is excellent, and since the horizontal shaft can be made smaller, the economic efficiency is also excellent. By preventing the bogie from being inserted into the horizontal shaft by the stopper, the connection work between the bogies becomes unnecessary, and the workability is further improved.

[Brief description of the drawings]

FIG. 1 is a side view showing an example of a bogie used for a propulsion method according to the present invention.

FIG. 2 is a front view of the truck.

FIG. 3A is a partially cutaway side view showing an example of a state in which a socket is mounted on a cable protection tube used in the propulsion method of the present invention, and FIG. It is a partially broken side view which shows the example which attached the member.

FIG. 4 is a schematic diagram showing a state in which a cart on which a cable protection tube is mounted is being carried into a shaft.

FIG. 5 is a cross-sectional view of a shaft and a shaft showing one process in an example of the propulsion method of the present invention.

FIG. 6 is a side view showing another example of a bogie used in the propulsion method of the present invention.

FIG. 7 is a cross-sectional view of a horizontal shaft and a vertical shaft showing one process in another example of the propulsion method according to the present invention.

FIG. 8 is a sectional view taken along line AA of FIG. 7;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Cable protection tube 20 Dolly 21 Tube end support member 21a Support plate 21b Dolly part 23 Connecting rod 23a Screw groove 23b Nut member 28 Connecting rod 29 Dolly 31 Socket 40 Pipe pressing device 43 Press plate 44 Connecting rod 70 Reaction force 72 Reaction force Plate 80 Stopper 81 Post 82 Reaction force

Claims (2)

(57) [Claims] 1. A multi-pipe propulsion method in which a plurality of preceding pipes are fitted into and connected to each of a plurality of preceding pipes and propelled into a horizontal shaft. Mounting the pipes in a state similar to the pipe state in the horizontal shaft and slidably in the axial direction, and pressing one end face of each pipe mounted on the bogie to move the pipes in the axial direction. Arranging the tube pressing device in the shaft, loading one of the carts into the shaft communicating with the horizontal shaft, and abutting one end face of each mounted tube to slide them. A step of connecting a reaction force plate to be blocked to a bogie carried into the shaft while facing the end face of each pipe; and inserting the bogie into the horizontal shaft with the reaction force plate at the top, a predetermined state A process of loading another bogie with a large number of pipes into the shaft, and A step of connecting the truck carried into the pit, the truck inserted into the horizontal pit, and the pipe pressing device arranged in the vertical shaft to integrate them, and using the pipe pressing device to pipe each tube of the subsequent bogie. A step of pressing in the axial direction, fitting to each pipe on the preceding bogie, and connecting by pressing against a reaction plate. 2. A method of propelling a multi-story pipe in which a plurality of preceding pipes are fitted and connected to each of a plurality of preceding pipes and are propelled into a horizontal shaft. Mounting the pipes in a state similar to the pipe state in the horizontal shaft and in a state where each pipe does not slide further with respect to the bogie by sliding in the axial direction; and one end face of each pipe mounted on the bogie. Arranging a pipe pressing device in the shaft to press the shaft and moving it in the axial direction; loading one of the carts into the shaft communicating with the horizontal shaft; and carrying the truck into the shaft. Inserting the pipes along the axial direction of the horizontal shaft, engaging a stopper around the open end of the horizontal shaft, and engaging the bogie inserted into the horizontal shaft with the stopper. So that the bogie is no longer inserted into the shaft. The process, the process of newly loading another bogie with tubes mounted in a predetermined state into the shaft, and the process of loading the bogie newly loaded into the shaft with each tube mounted on this bogie in the horizontal shaft Positioning each tube of the inserted bogie so as to be aligned with each other, and pressing each tube of the subsequent bogie by the tube pressing device,
A method of fitting and connecting each of the non-sliding pipes on the preceding bogie in a state where the pipe is not inserted into the horizontal shaft, and a method of propelling a multi-section pipe.