JPH09119286A - Structure of connecting section of shield type machine and propelling pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent transmission to a pipe of rolling generated in a shield type machine by arranging a connecting pipe between the pipe and the shield type machine and connecting the connecting pipe and the shield type machine in a liquid-tight manner through sealing members respectively. SOLUTION: Connecting pipes 34, 36 are disposed between a shield type machine 16 and a pipe 18, and both connecting pipes 34, 36 are connected mutually in a liquid-tight manner through a sealing member 38. The machine 16 is joined with the front connecting pipe 34 in the liquid-tight manner through another sealing member 38, and the rear connecting pipe 36 is linked with the pipe 18 in the liquid-tight manner through a sealing member 62. When rolling is generated in the machine 16 during propulsion in the ground, when the machine 16 is rotated and moved in the direction opposite to the direction of rotation of a rotary cutter head, deformation by tortion is generated in the sealing members 38, 36 respectively, the rolling of the machine 16 is absorbed, and transmission to the pipe 18 of rolling can be prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a connection portion between a pipe propelled into the ground for carrying out a pipe roof construction method and a shield type excavator preceding the pipe.

In the present invention, the "pipe roof construction method" means to form a space in the ground, so that a plurality of pipes provided with joints on both side portions facing each other are penetrated into the ground, whereby parallel pipes are formed. The construction of a support roof in the ground, which is composed of a plurality of rows of pipes and two rows of pipes adjacent to each other are connected to each other through these joints.

[0003]

2. Description of the Related Art Conventionally, the penetration or installation of each row of pipes into the ground has been carried out by a shield-type excavator having a rotary cutter head, followed by a plurality of pipes in sequence. There is. When propelling the pipe, one joint of the pipe is engaged with one joint of the existing pipe row.

By the way, the shield type excavator sometimes rotates (rolls) in the other direction due to the rotation of the cutter head in one direction during excavation.

Conventionally, a shield type excavator and a pipe following it are fixed to each other, and the pipes are fixed to each other. Therefore, if rolling occurs in the shield type excavator, rolling also occurs in the pipes connected to the shield type excavator. The presence of rolling may cause the existing pipe row joint to be deformed or destroyed by the rotational movement of the propelled pipe joint received therein, making further propelling of the pipe impossible.

[0006]

SUMMARY OF THE INVENTION It is an object of the present invention to prevent the rolling generated in a shield type excavator from being transmitted to a succeeding pipe.

[0007]

SUMMARY OF THE INVENTION The present invention comprises a pipe having opposite sides provided with joints and a rotary cutter head preceding the pipe which is propelled into the ground to carry out the pipe roof construction method. A structure of a connection part with a shield type excavator, which includes at least one connecting pipe arranged between the pipe and the shield type excavator, wherein the shield type excavator and the connecting pipe form a seal member. Are liquid-tightly connected to each other via a seal member, and the connection pipe and the pipe are liquid-tightly connected to each other via a seal member.

A plurality of connecting pipes may be liquid-tightly connected to each other via a seal member. Also, the pipe is connected to the connection pipe via an adapter pipe having a front end portion received in a rear end portion of the connection pipe and a rear end portion fixed to the pipe, and the seal member is It may be arranged between the front end of the adapter pipe and the rear end of the connecting pipe.

[0009]

According to the present invention, at least one connecting pipe liquid-tightly connected to each of the shield type excavator and the pipe via the seal member is arranged between the shield type excavator and the pipe. When rolling occurs in the shield type excavator, the rolling is absorbed by the torsional deformation of the seal member and thus is not transmitted to the connection pipe or the pipe, or the seal member excites the shield type excavator. Due to the frictional resistance generated between the connecting pipe and between the connecting pipe and the pipe,
It is possible to realize a state in which the connection pipe rotates but the pipe does not rotate.

When two or more connecting pipes are arranged and they are connected to each other via a seal member, a part of the rotational force due to the rolling of the shield type excavator can be sequentially dispersed to a plurality of connecting pipes.

When the connection pipe and the pipe are connected via the adapter pipe, after the pipe row is installed in the ground, the adapter pipe can be separated from the pipe and reused. .

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIG. 1, in order to carry out a pipe roof construction method, a shield type excavator 16 and a plurality of pipes 18 are provided through a hole 14 provided in a retaining wall 12 of a shaft 10.
It is shown that and were propelled into the ground. The shield type excavator and the pipe may be propelled through a hole in a retaining wall (not shown) provided on the ground without constructing the starting shaft.

The shield type excavator 16 includes a pipe 18 and a plurality of hydraulic jacks 2 installed at the bottom of the shaft 10.
It is driven by a stretch operation of zero. A push wheel 22 is connected to these ends of the hydraulic jack 20. Push ring 22
Touches the end of the pipe 18 and transmits the pressing force thereto.

A pipe row 24 (FIGS. 5 and 6) consisting of a plurality of pipes 18 connected in series from the starting shaft 10 to the reaching shaft (not shown) by adding the pipes 18 and applying a propulsive force thereto. Is installed underground. By repeatedly propelling the shield type excavator and the pipe, a plurality of parallel pipe rows are installed in the ground. A pair of pipe rows 24, 26 propelled into the ground and adjacent to each other are connected to each other via joints 28, 30 provided on both sides of each pipe 18 and extending in the longitudinal direction of the pipes. Each pipe 18 is made of steel pipe or concrete pipe, and the pipes 18 adjacent to each other in each pipe row
Are fixed to each other at their tube ends.

The shield type excavator 16 has a rotary cutter head 32 at its front end. During the propulsion of the shield type excavator 16, the rotary cutter head 32 is rotationally driven in one direction to excavate or expand the natural ground, and the shield type excavator 16 is driven.
To form a hole through which the pipe 18 subsequent to is inserted.

In the present invention, the shield type excavator 16
Between the pipe and the pipe 18, two serial connection pipes 34 and 36 made of a steel pipe are arranged, and the connection pipes are mutually connected via a ring-shaped elastic body, for example, a seal member 38 made of a rubber material (FIG. 2). Liquid-tightly connected. The shield type excavator 16 is liquid-tightly connected to the front connecting pipe 34 via another sealing member 38, and the rear connecting pipe 36 is connected to the pipe 18 by a sealing member 38. Liquid-tight connection is made via a seal member 62 described later.

Referring to FIG. 2, each connecting pipe 34, 36
Includes a main body 35, 37 having the same outer diameter as the outer diameters of the shield type excavator 16 and the pipe 18. Further, each of the connecting pipes 34 and 36 has one end 40 and the other end 42 having an outer diameter smaller than the outer diameter of the main body. The outer diameter of the one end portion 40 is slightly smaller than the inner diameter of the other end portion 42, and the end portion 40 of the rear connecting pipe 36 is coaxially received in the end portion 42 of the front connecting pipe 34.

An annular groove 44 is provided on the peripheral surface of the end portion 40 of the rear connecting pipe 36. The ring-shaped seal member 38 is received in the annular groove 44, a part of which protrudes from the annular groove 44 and is in contact with the inner peripheral surface of the end portion 42 of the front connecting pipe 36. The seal member 38 is formed of the connecting pipe 3
Liquid-tightness is provided between the pipes 4 and 36 to prevent the inflow of groundwater, earth and sand, etc. from the inside between the connecting pipes.

Further, the end portion (tail portion) 46 of the shield type excavator 16 is composed of a cylindrical projecting portion having an outer diameter equal to the outer diameter of the end portion 40 of the connecting pipe. A cylindrical collar 48 surrounds the protrusion and the end 40 of the connecting pipe 34 which is coaxial. The tail portion 46 of the shield type excavator 16 and the end portion 40 of the connecting pipe 34 are provided with annular grooves 50 and 44 for releasing on the peripheral surfaces thereof, and a seal member 38 is arranged in each annular groove. . These seal members 38 are in contact with the inner peripheral surface of the collar 48, and are connected to the tail portion 46 and the collar 48 mutual pipe and the connecting pipe 3.
Between the end 40 of 4 and the collar 48,
Provides liquid tightness. As a result, the shield type excavator 16
A liquid tightness is provided between the connection pipe 34 and the connection pipe 34. The collar 48 has a wall portion 52 extending orthogonally to its axis, and the wall portion 52 abuts the open end of the tail portion 46 of the shield type excavator 16 and the open end of the end portion 40 of the connecting pipe 34.

As an alternative to the illustrated example using a collar, the tail portion 46 of the shield type excavator 16 is replaced by the end portion 42 of the connecting pipe 34.
The shielded excavator 16 and the connecting pipe 34 may be connected so that the seal member 38 is received therein and disposed between the tail portion 46 and the end portion 42.

The rear connecting pipe 36 and the pipe 18 are connected to each other via an adapter pipe 54 made of a steel pipe. Adapter tube 54 has a tubular body 56 and an end 58 extending from the body in the axial direction thereof. Body 56
Has the same outer diameter as the connecting pipe and pipe, and
The end 58 has the same outer diameter as the outer diameter of the end 40 of the connecting pipe.

The adapter tube 54 has its end 58 coaxially received within the end 42 of the rear connecting tube 36. An annular groove 60 similar to the annular groove 44 at the end of the connecting tube is provided at the end 58 of the adapter pipe 54, and the annular groove 60 has a ring-shaped seal member 62 similar to the seal member 38. Are arranged. Seal member 62
Is in contact with the inner peripheral surface of the end portion 42 of the connecting pipe 36 on the outer peripheral surface thereof. Thereby, like the seal member 38,
Liquid tightness is provided between the connecting pipe 36 and the adapter pipe 54.

On the other hand, the pipe 18 is fixed to the open end of the main body 56 of the adapter pipe 54 by welding. The adapter pipe 54 can be reused by cutting it from the pipe 18 after the pipe row is installed.

By the way, when rolling occurs in the shield type excavator 16 propelled in the ground, that is, when the shield type excavator 16 makes a rotational movement in a direction opposite to the rotational direction of the rotary cutter head 32, the seal member is provided. 38,62
Respectively twist and deform to absorb the rolling of the shield type excavator 16. Alternatively, rotation is performed on the connection portion between the shield type excavator 16 and the connection pipe 34, the connection portion between both connection pipes 34 and 36, and the connection portion between the connection pipe 36 and the adapter pipe 54, where the seal member is arranged, respectively. A frictional resistance with respect to the direction is generated, and a part of the rotational force of the shield type excavator 16 is absorbed by the frictional energy and the rotational movement of the connecting pipes 34 and 36. As a result, the shield type excavator 1
The rolling of 6 is prevented from transmitting to the adapter tube 54 or pipe 18.

By the way, the number of the connecting pipes arranged between the shield type excavator 16 and the pipes 18, that is, the adapter pipes 54 can be one or three or more. Also,
Without arranging the connecting pipe, for example, a collar 48
The seal member 62 is arranged again using the adapter pipe 5
The end 58 of the four can be directly connected to the tail 46 of the shield type excavator 16. Setting the quantity of the connecting pipe,
The omission of the connecting pipe is determined in consideration of the geology of the ground where the pipe 18 is installed. For example, since rolling is unlikely to occur in homogeneous cohesive soil, fine sandy soil, etc., the number of the connecting pipes is set small or omitted, and rolling is likely to occur in cobblestone, gravel soil, etc. Increase the quantity.

In the illustrated example, the shield type excavator 1
Junction cutters 64 and 66 for forming insertion spaces for the joints 28 and 30 on both sides of the pipe 18 are provided on both sides of the pipe 18, respectively.

Both joints 28 and 30 of the illustrated pipe 18 are
It comprises a female joint and a male joint receivable in the female joint. Both joints 28 and 30 shown in FIG. 5 are made of a pair of angle steels. The female joint 28 is arranged and welded on one side of the pipe 18 facing each other such that the pair of angle steels are circumferentially spaced from each other and their inner corners are facing each other. It becomes. Also,
The male joint 30 is formed by welding the pair of angle steels to the other side of the pipe such that the pair of angle steels are circumferentially spaced from each other and their outer corner portions face each other.

The cutter 64 has an elongated box shape as a whole,
When the shield type excavator 16 is propelled in the ground, the ground excavation is ground to form a space having a cross-sectional shape capable of receiving the female joint 28 of the pipe 18. Also, the cutter 6
6 has substantially the same cross-sectional shape as the male joint 30 of the pipe 18, and is capable of receiving the male joint 30 of the pipe 18 by cutting the ground when the shield type excavator 16 is propelled in the ground. A space having a cross-sectional shape is formed. However, when the shield type excavator 16 is propelled along an existing pipe row, a part of the cutter 66 for the male joint moves in the female joint 28 of the pipe row.

Preferably, the cutters 68 and 70 similar to the cutters 64 and 66 are made to correspond to the cutters 64 and 66, and both side portions of the connecting pipes 34 and 36 and the adapter pipe 54 are connected.
Also attach to both sides. These cutters 68, 70
Moves in the space formed by the cutters 64 and 66 during propulsion and maintains the space.

The attitude of the shield type excavator 16 which is rotationally displaced by the rolling can be returned to the original position by rotating the rotary cutter head 32 in the reverse direction.

Both joints 28 and 30 shown in FIG. 6 are made of T-shaped steel and a slit provided on the side of the pipe 18 and extending in the longitudinal direction thereof. Inside the pipe 18, a grooved steel 31 covering the slit 28 is attached in order to prevent intrusion of earth and sand or groundwater through the slit 28. The T-section steel is welded to the other side portion of the pipe 18 by a base portion that can extend into the pipe 18 through the slit. Further, the tip end portion connected to the base portion of the T-section steel is received inside the pipe 18.

In FIG. 3, reference numeral 72 is the connecting pipe 3.
Reference numeral 74 denotes a wall portion that partitions the body of 6 from the end portion 42, and reference numeral 74 denotes a plurality of reinforcing ribs fixed to the inner wall of the adapter tube 54 and extending in the axial direction thereof.

[Brief description of the drawings]

1 is a schematic cross-sectional view of a shielded excavator being propelled in the ground, the following connecting pipes and pipes.

FIG. 2 is a vertical sectional view of a connecting pipe and an adapter pipe.

3 is a cross-sectional view taken along line 3-3 of FIG.

4 is a cross-sectional view taken along line 4-4 of FIG.

FIG. 5 is a schematic diagram of a multiple pipe array.

FIG. 6 is a schematic diagram of another example of a multiple pipe array.

[Explanation of symbols]

 16 Shield Type Excavator 18 Pipe 28, 30 Joint 32 Rotating Cutter Head 34, 36 Connection Pipe 48 Color 54 Adapter Pipe 42 Flange

Claims (3)

[Claims] 1. A connection between a pipe having both sides provided with a joint and a shield type excavator having a rotary cutter head preceding the pipe, which is propelled into the ground to carry out the pipe roof construction method. A structure of at least 1 between the pipe and the shield type excavator.
Including one connecting pipe, the shield type excavator and the connecting pipe are liquid-tightly connected to each other via a seal member,
A structure of a connecting portion between a shield excavator and a pipe, wherein the connecting pipe and the pipe are liquid-tightly connected to each other via a seal member. 2. The structure according to claim 1, wherein the plurality of connecting pipes are liquid-tightly connected to each other via a seal member. 3. The pipe is connected to the connection pipe via an adapter pipe having a front end portion received at a rear end portion of the connection pipe and a rear end portion fixed to the pipe,
The structure according to claim 1, wherein the seal member is disposed between a front end portion of the adapter pipe and a rear end portion of the connection pipe.