JPH0412157Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention is a transport pipe for transporting excavated soil, which is generated when constructing an underground pipe using the propulsion method, to the outside of the underground pipe. The present invention relates to an apparatus, and more particularly to a transport pipe apparatus that can expand and contract a transport pipe line arranged in a starting shaft following a propulsion mechanism.

[Conventional technology]

There is a propulsion method as a shield tunnel construction method for constructing relatively small-diameter underground pipelines such as underground walkways and water and sewage lines.

This is done by installing an excavator at the tip of a propulsion pipe such as a hium pipe, which is propelled by a propulsion jack installed in the starting shaft, and excavating the ground under mud. The construction will be carried out successively from within the starting shaft.

In addition, the muddy soil excavated by the excavator is
From the face position, the soil is transferred by a pressure pump via a transport pipe to an above-ground waste treatment facility, where it is processed.

On the other hand, when the propulsion tubes that are successively added are pushed into the excavated earth by the propulsion jack by an amount corresponding to the length of one of the propulsion tubes, the propulsion jack is retreated and a new propulsion tube is added. In this case, the transport pipe that communicates between the pressure pump in the propulsion pipe pushed into the ground and the processing equipment on the surface through the launch shaft must be separated inside the launch shaft, and the length of the additional propulsion pipe must be cut off. The transport pipe must be extended by an amount corresponding to The transport pipe section must be structured so that it moves in accordance with the stroke motion of the propulsion jack.

Conventionally, the transport pipe disposed in such a starting shaft has been constructed of a high-pressure flexible pipe of about 8 inches that does not interfere with the transport of discharged soil.

[Problem that the invention attempts to solve]

Conventional high-pressure pipes such as those mentioned above have extremely poor flexibility and flexibility, so in order to prevent the pipe from suffering repeated bending fatigue due to the stroke motion of the propulsion jack, the pipe must be made longer than necessary. As a result, the pipe becomes a nuisance, which hinders various operations in the starting shaft.In addition, it takes time and effort to connect and disconnect the pipe and the transport pipe on the propulsion pipe side, resulting in poor workability. It was hot.

[Purpose of invention]

The present invention was made to solve the above problems, and it can expand and contract easily and reliably by following the stroke operation of the propulsion jack.
The purpose of the present invention is to provide a transport pipe device for soil removal that does not interfere with various operations in a starting shaft.

[Means for solving problems]

The transport pipe device for soil removal according to the present invention is a transport pipe device that uses a propulsion jack to push the propulsion pipe into the ground, and at the same time transports excavated soil to the outside of the underground pipe using a pressure pump and a transport pipe. Connecting the pipe and the ground-side piping by an extensible transport pipe consisting of an inlet pipe, an outlet pipe, and a plurality of intermediate pipes that are bent and extendably connected between these pipes, and
The bent connecting portion between the inlet pipe and the intermediate pipe is supported by a back ring of a propulsion jack, and the bent connecting portion between the outlet pipe and the intermediate tube is supported by a fixed part.

[Effect of invention]

In this invention, the inlet pipe side of the telescoping transport pipe is supported by the back ring of the propulsion jack, and the outlet pipe side is supported by the fixed part, so when the propulsion jack makes a stroke movement, the telescoping transport pipe follows this and moves in some way. This allows for reliable bending, expansion and contraction without any bending stress.

[Example of idea]

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

In the figure, 1 is the starting shaft, and this shaft 1
A propulsion jack 4 is placed on a propulsion platform 3 installed on the bottom foundation concrete 2 of the shaft, and its pressure side is engaged with a bearing wall 5 formed along the shaft wall opposite to the starting shaft entrance 1a. At the same time, the jack propulsion end side is connected to a back ring 6 movably placed on the propulsion platform 3.

7 is a propulsion jack 4 via a back ring 6
This is a propulsion tube such as a hump tube that is pushed into the ground from the starting tunnel entrance 1a by a tunnel.
is arranged, and the earth and sand excavated by this excavator 9 is transferred to the starting shaft 1 side via a transport pipe 11 by a pressure pump 10, and
One end of a telescopic transport pipe 12 that expands and contracts in conjunction with the stroke motion of the propulsion jack 4 is connected to the protruding end of the transport pipe 11 disposed in the propulsion pipe 7 in the starting shaft 1. The other end is connected to a fixed pipe 13 that is connected to an earth removal treatment facility (not shown) on the ground.

The telescopic transport pipe 12 includes an inlet pipe 121, an outlet pipe 122, and first and second intermediate pipes 123, 124 connecting the inlet pipe 121 and the outlet pipe 122.
One end of the inlet pipe 121 is separably connected to the transport pipe 11 disposed within the propulsion pipe 7 via a stop valve 14, and the other end opening is perpendicular to the longitudinal direction. The other end opening is bendably connected to one end of a similarly curved first intermediate pipe 123 by a rotary pipe joint 125. The other end of the intermediate pipe 123, which is similarly curved, is bendably connected to one end of the second intermediate pipe 124, which is similarly curved, by a rotary pipe joint 126.
Furthermore, the other end of the second intermediate pipe 124, which is curved in the same way, is connected to one end of the outlet pipe 122, which is curved in the same way, by a rotary joint 127, and the other end of the outlet pipe 122 is fixed. It is connected to piping 13.

The other end of the inlet pipe 121 on the bent side is rotatably supported by a bracket 17 by a pivot pin 16 which is provided on the curved part thereof to protrude in line with the axis 15 of the rotary pipe joint 125. 1 intermediate pipe 123
One end portion is rotatably supported by a bracket 19 by a pivot pin 18 protruding from the curved portion in line with the axis 15, and each of the brackets 17, 19
is fixed vertically on a support base 20 horizontally fixed to the upper outer periphery of the back ring 6.

On the other hand, the other end of the second intermediate pipe 124 is rotatably supported by a bracket 23 by a pivot pin 22 that protrudes from the curved part of the second intermediate pipe 124 in alignment with the axis 21 of the rotary pipe joint 127. together with the outlet pipe 122
One end portion is rotatably supported by a bracket 25 by a pivot pin 24 protruding from the curved portion in line with the axis 21, and each of the brackets 23,
25 is fixed to the beam member 1b of the starting shaft 1.
The other end of the first intermediate pipe 123 is rotatably connected to one end of the support link 28 by a pin 27 protruding from the curved part of the first intermediate pipe 123 in alignment with the axis 26 of the rotary pipe joint 126. The other end of the support link 28 is rotatably connected to the bracket 25.
Further, one end of the second intermediate tube 124 is rotatably connected to one end of a support link 30 by a pin 29 protruding from the curved portion thereof in alignment with the axis 26, and the other end of the support link 30 is connected to the above-mentioned bracket. 17 so as to be rotatable.

In the earth removal transport pipe device configured as described above, when adding a new propulsion pipe 7a to the propulsion pipe 7 that has already been pushed into the ground from the starting mine entrance 1a and pushing it into the ground, the excavator 9 As the excavator excavates the face 8 and moves forward, the pressure pump 10 and the earth and sand transport pipe 11 are also pulled in the same direction. When the propulsion jack 4 is operated as the excavator 9 excavates, the entire propulsion tube 7 including the buckling 6 and the new propulsion tube 7a is propelled in the direction of the arrow in FIG. Along with this, the support stand 20 and the bracket 17,
The first and second intermediate pipes 123 and 124 of the telescopic transport pipe 12 connected to the back ring 6 via the back ring 6 are sequentially extended from the state shown by the solid line in FIG. When the forward movement end indicated by the two-dot chain line in the figure is reached, the state shown by the two-dot chain line in FIG. 1 is reached.

The muddy earth and sand excavated by the excavator 9 is transported to other processing equipment through the transport pipe 11, the telescopic transport pipe 12, and the fixed pipe 13 by driving the pressure pump 10.

In addition, when adding a new propulsion pipe 7a, close the stop valve 14 of the inlet pipe 121 of the telescopic transport pipe 12, which is in the state shown by the two-dot chain line in FIG.
Thereafter, the inlet pipe 121 and the transport pipe 11 are disconnected from each other at the joint portion 31, and the propulsion jack 4 is retreated to the retreating end indicated by the solid line in FIG. As the buckling 6 also retreats with this retreating operation, the telescopic transport pipe 12 is reduced to the state shown by the solid line in FIG. After that, a new propulsion tube 7a is lowered from the ground and inserted between the back ring 6 and the rearmost propulsion tube 7 pushed into the ground from the starting mine entrance 1a, and one end of the entrance tube 121 and the transport inside the propulsion tube 7 are inserted. A new transport pipe is added between the pipe 11 and extended. Then, after opening the stop valve 14, the excavator 9 is operated again, and the propulsion jack 4 is operated to push the propulsion pipe into the earth one by one.

Thereafter, by repeating the same operations, an underground conduit will be constructed in the ground.

As described above, in this embodiment, the transport pipe for discharging soil arranged in the starting shaft 1 is divided into an inlet pipe 121, an outlet pipe 122, and first and second intermediate pipes 123, 124.
The transport pipes 12 are bendably connected to each other by rotary pipe joints 125, 126, and 127 to be extendable and retractable, and are extendable and retractable following the forward and backward movement of the back ring 6, so that the length of the transport pipe 12 can be kept to the minimum required length. In addition, it does not generate any bending reaction force unlike conventional high-pressure pipes, allowing smooth bending, expansion and contraction, and the condition of the inlet pipe 121 remains almost unchanged regardless of expansion and contraction, so the transportation pipe 11 The connection and disconnection work between the telescopic transport pipe 12 and the telescopic transport pipe 12 is simplified, and there is no problem in adding the propulsion pipe 7 or the like.

Further, since the inlet pipe 121 is provided with a stop valve 14, by closing this valve, the earth and sand in the telescopic transport pipe 12 and the fixed pipe 13 can be prevented from flowing out into the starting shaft 1.

Furthermore, the mutually bent connecting portions of the inlet pipe 121, the outlet pipe 122, and the first and second intermediate pipes 123, 124 are supported and reinforced by the brackets 17, 19, 23, 25 and the support links 28, 30. Therefore, it can be made structurally robust.

In addition, in the above embodiment, the first and second intermediate pipes 1
23, 124 are assembled with reinforcing support links 28, 30, but these may be omitted, and the number of intermediate pipes bendably connected between the inlet pipe 121 and the outlet pipe 122 is , is not limited to two as in the above embodiment.

[Effect of idea]

As described above, according to the present invention, between the transport pipe placed inside the propulsion pipe and the pipe laid on the ground,
An inlet pipe connected to the transport pipe, an outlet pipe connected to the ground pipe, and a bend between the inlet pipe and the outlet pipe,
The pipes are connected by a telescoping transport pipe consisting of a plurality of intermediate pipes that are extendably connected, and the bent connecting part between the inlet pipe and the intermediate pipe is supported by a back ring, and the bent connecting part between the outlet pipe and the intermediate pipe is launched. Since it is supported on a fixed part within the shaft, it can be expanded and contracted easily and reliably following the stroke movement of the propulsion jack, and the amount of expansion and contraction of the telescopic transport pipe is also the same as that required for the stroke movement of the propulsion jack. This requires only the minimum amount of equipment needed, and this does not cause any hindrance to various operations within the launch shaft.In addition, since bending stress does not occur in the telescopic transport pipe, the connection between the telescopic transport pipe and the propulsion pipe side transport pipe is easy. This has the effect of simplifying work such as connection and disconnection.

[Brief explanation of the drawing]

Figure 1 is a side view showing an embodiment of the earth removal transport device according to the present invention applied to the construction of underground pipelines using the propulsion method, and Figure 2 is an enlarged view taken along the - line in Figure 1. be. 1...Starting shaft, 4...Propulsion jack, 6...
...Buckling, 7...Propulsion tube, 9...Drilling machine,
10...Pressure pump, 11...Propulsion pipe side transport pipe,
12... Telescopic transport pipe, 121... Inlet pipe, 122
... Outlet pipe, 123, 124 ... Intermediate pipe, 12
5, 126, 127... Rotating pipe joint, 14... Stop valve, 17, 19, 23, 25... Bracket, 28, 30... Support link.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) In a transport pipe device that uses a propelling jack to push a propulsion pipe into the ground and transport excavated soil to the outside of an underground pipe using a pressure pump and a transport pipe,
The propulsion pipe side transport pipe and the ground side pipe are connected by a telescopic transport pipe consisting of an inlet pipe, an outlet pipe, and a plurality of intermediate pipes that are bent and extendably connected between these pipes, and the above-mentioned inlet pipe A transport pipe device for soil removal, characterized in that a bent connecting portion between the outlet pipe and the intermediate pipe is supported on a back ring of a propulsion jack, and a bent connecting portion between the outlet pipe and the intermediate pipe is supported on a fixed portion. (2) The transport pipe device for soil removal according to claim 1, wherein the inlet pipe has a stop valve.