JPH1018757A - Pipe roof construction method, connecting pipe and excavation device - Google Patents

Abstract

(57) [Summary] [PROBLEMS] When constructing a pipe roof by burying a large number of pipes in the ground, the construction period is shortened and the accuracy is improved. A reference pipe having a female joint at a predetermined position is buried by a semi-shield method, and at least two steel pipes are arranged in parallel adjacent to the reference pipe and welded via a connecting member. The connecting pipe B is disposed, and the male joint 5 of the connecting pipe B is fitted to the female joint 2 of the reference pipe 1 and propelled. When the connecting pipe B is propelled, the plurality of excavators 14 are arranged in parallel at the same pitch as the steel pipe 3 constituting the connecting pipe B, and the adjacent excavator 14 is provided on the outer periphery of the tail shield 12 with the connecting portion 15 and The excavating device C connected by connecting with the connecting member 16 is used. The connecting pipe B is made to follow the excavating device C, and furthermore, the thrust is given by bringing the push ring 21 of the main pushing device D into contact with the rear end of the connecting pipe B, so that a plurality of pipes are simultaneously propelled and buried. .

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for constructing a pipe loop capable of shortening the construction period, a connecting pipe advantageous for use in this method, and an advantageous excavation for propelling the connecting pipe. It relates to a device.

[0002]

2. Description of the Related Art When a large tunnel is constructed underground, a shield method is generally employed. But,
For example, in the case of crossing a relatively short distance shield such as a dike, a pipe roof is built by propelling and burying a large number of pipes adjacent to each other. The construction of tunnels has been carried out with the finishing.

[0003] The above-mentioned pipe roof is constructed by propelling and embedding a steel pipe having a male-female fitting joint at a predetermined position on the outer circumference over the entire length in the longitudinal direction by employing a semi-shield method. Has been built. That is, by installing a main pushing device that generates thrust on the starting side of the steel pipe, arranging and excavating an excavator for excavating the ground at the head, and further propelling the excavator by following the steel pipe. Steel pipes are buried underground. A pipe roof is constructed by repeatedly arranging another steel pipe adjacent to the already buried steel pipe, connecting the joint of the already buried steel pipe and the joint of the other steel pipe and propelling the same.

In particular, when the length of a tunnel to be constructed is larger than the unit length of a steel pipe, each time one steel pipe is propelled, a new steel pipe is welded to the steel pipe and sequentially propelled to arrive from the starting side. Burying one steel pipe apparently to the side, further arranging another steel pipe adjacent to the steel pipe, connecting the joint of the already buried steel pipe and the joint of the other steel pipe and repeating the work of propulsion So, we are building a pipe roof.

[0005]

In the above-mentioned method, since the steel pipes are propelled one by one, there is a problem that it takes inevitably a construction period corresponding to the number of the steel pipes constituting the pipe roof. In addition, the joint is provided so as to protrude over the entire length of the outer periphery of the steel pipe, and there is a problem that the joint acts as a resistance during propulsion to apply a rotating force to the steel pipe. With this problem, the positional accuracy of the buried steel pipe is reduced. There is a problem of getting worse.

[0006] An object of the present invention is to provide a construction method capable of shortening the construction period for constructing a pipe roof and improving the accuracy of the constructed pipe roof.
An object of the present invention is to provide an advantageous connecting pipe and an excavator.

[0007]

According to the present invention, there is provided a method for constructing a pipe roof according to the present invention, wherein a joint portion is provided at a predetermined position on an outer circumference at a reference position of a pipe roof to be constructed. The reference pipes are buried by a semi-shield propulsion method, at least two pipes are arranged in parallel and connected, and a connecting pipe provided with a joint portion over the entire length at a predetermined position on the outer periphery is arranged on the starting side and the connecting pipe is provided. A digging device for digging a tunnel corresponding to a pipe constituting a connecting pipe is arranged at a front end of the connecting pipe, and a joint of the connecting pipe is engaged with a joint provided on the reference pipe, and thereafter, the connecting pipe is formed. Thrust is applied to the pipe, propelled along the reference pipe and buried,
Furthermore, the present invention is characterized in that a joint portion of a new connecting pipe is engaged with a joint portion of the buried connecting pipe to be propelled and buried.

In the above-described method for constructing a pipe roof, a reference pipe is buried at a reference position, and thereafter, a joint of a connecting pipe connecting at least two pipes is connected to a joint of the reference pipe and propelled. The connecting pipe can be propelled along the reference pipe. Therefore, at least two pipes are propelled by one propulsion operation, and the construction period can be shortened.

[0009] Further, since the connecting pipe is formed by connecting at least two pipes, the rotational force on the pipes caused by the resistance of the joint portion when the connecting pipe is propelled is at least two pipes arranged in parallel. Therefore, the torsion (rolling) of the tube is reduced as compared with the case where a rotational force acts on one tube. For this reason, the positional accuracy of the buried connecting pipe can be improved.

[0010] Further, the connecting pipe according to the present invention comprises at least two pipes.
The steel pipes are arranged in parallel while maintaining a predetermined interval, and the adjacent steel pipes are welded via connecting members.Furthermore, a female joint is provided on the steel pipe on one side of the steel pipe located at both ends in the connection direction. The male pipe is provided on the other side of the steel pipe over the entire length. In particular, it is preferable that at least two steel pipes have different longitudinal ends at different positions in the connecting pipe.

In the above connecting pipe, when the connecting pipe is propelled for a long distance, the position of the pipe joint by welding in the longitudinal direction can be alternately shifted. There is no loss of reliability against variations in strength due to welding.

Further, the excavating device according to the present invention has a shield body and a tail shield configured to be refractible to each other, and a cutter head for excavating the ground is provided at a tip of the shield body, and the cutter head is provided at a predetermined position on the outer periphery of the tail shield. An excavator provided with a connecting portion for connecting to another adjacent excavator, wherein the excavator is arranged in parallel with the number of steel pipes constituting the connecting pipe and connected to each other via the connecting portion. It is.

In the above-mentioned excavating apparatus, the number of excavating machines corresponding to the number of steel pipes constituting the connecting pipe is arranged in parallel, and connected to another excavating machine arranged adjacently through a connecting portion provided at a predetermined position on the outer periphery. Therefore, it is possible to excavate a tunnel to bury a connecting pipe in the ground.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The construction method of the pipe roof and the structures of a connecting pipe and a digging device will be described below with reference to the drawings. 1 is a view for explaining a method of constructing a pipe roof, FIG. 2 is a plan view for explaining a state in which a connecting pipe is propelled, FIG. 3 is a view taken along the line III-III of FIG. 2, and FIG. FIG. 5 is a front view of the excavating device, partially cut away, as viewed from the direction of the arrow, FIG. 5 is a diagram illustrating a configuration of the connecting pipe, FIG. 6 is a diagram illustrating a connection state of the connecting pipe, and FIG. FIG.

[0015] The method for constructing a pipe roof according to the present invention comprises:
As shown in FIG. 1, first, a reference pipe 1 serving as a reference is buried in the ground by a normal semi-shield propulsion method on an assumed line when constructing the pipe roof A, and then the reference pipe 1 is The connecting pipe B is connected in a set direction, and the connecting pipe B is propelled and buried under the ground.

The reference pipe 1 is a steel pipe.
The two female joints 2 are formed at predetermined positions on the outer periphery of. The female joint 2 is formed by welding a flange of a channel steel 2a over the entire length to a predetermined position (usually a diametrically opposed position) on the inner surface of the reference pipe 1 and at the same time,
The reference pipe 1 corresponding to the space between the flanges is cut along the entire length to form a groove 2b.

Since the reference tube 1 does not protrude from the outer periphery, there is no variation in friction resistance with the ground during propulsion. For this reason, it is possible to maintain an accurate embedded position and posture without rolling. That is, when the connecting pipe B is connected to the reference pipe 1 in the horizontal direction, the female joint 2 can be accurately positioned in the left-right direction and propelled, and the set burying position can be maintained.

As shown in FIG. 5, a connecting pipe B connected to the reference pipe 1 has at least two steel pipes 3 of the same specification arranged in parallel at a predetermined interval, and a connecting member 4 is provided between the two. And rigidly connected by welding the connection member 4 and each steel pipe 3.

As shown in FIG. 1A, a steel pipe having a predetermined width and thickness is used as the connecting member 4 for the connecting pipe B, and two steel pipes 3 are welded by the steel sheet over the entire length. May be connected. Further, as shown in FIG. 3B, an H-shaped steel or another structural steel may be used as the connecting member 4, and the steel pipe 3 may be connected by the steel. Further, a structure may be used in which a plurality of steel pipes (not shown) having the same length are used as the connection members 4 and the steel pipes are arranged at a predetermined pitch between two steel pipes and welded to each other. .

Steel pipes 3 located at both ends in the parallel direction of connecting pipe B
Is provided with a joint. That is, the same female joint 2 formed on the reference pipe 1 is provided on the steel pipe 3 located at one end in the parallel direction, and the steel pipe 3 located on the other side is provided.
Is provided with a male joint 5. The male joint 5 is fitted into the female joint 2 of the reference pipe 1 or the female joint 2 of the already buried connection pipe B, guided in the propulsion direction, and is connected to the reference pipe 1 or the already buried connection pipe B. This is for maintaining the position and posture. The male joint 5 of this embodiment is made of a T-section steel welded to a predetermined position on the outer periphery of the steel pipe 3 over its entire length.

The shapes of the female joint 2 and the male joint 5 are not limited to the above example, but may be, for example, shapes as shown in FIG. That is, FIG. 3A shows a female joint 2 formed by welding a pair of angle irons to the outer periphery of a steel pipe 3 with the flanges facing each other and maintaining a predetermined interval, and the flanges of the pair of angle irons back together. 1 shows a male joint 5 formed by welding to the outer periphery of a steel pipe 3. FIG. 2B shows a female joint 2 and a male joint 5 which are formed by welding a C-shaped material having a groove formed over the entire length thereof to a steel pipe having a predetermined diameter and welding the outer circumference of the steel pipe 3. FIG. 2C shows a female joint 2 made of the same C-shaped material as described above and a male joint 5 made of a T-shaped steel.

In any case, the female joint 2 and the male joint 5 need only have a structure capable of fitting and guiding each other, and are not limited to the shape shown in FIG. 7 as long as they have the functions described above.

The connecting pipe B constructed as described above is shown in FIG.
As shown in FIG. 3, the thrust is applied by the main pushing device D after the excavating device C previously connected at the same pitch as the connecting pipe B, and the propulsion is performed.

The excavating device C is connected to a known excavating machine 14 having a shield body 11 and a tail shield 12 which are refractably connected to each other by a plurality of jacks (not shown) and a cutter head 13 is provided at the tip of the shield body 11. The steel pipes 3 constituting B are arranged in parallel at the same pitch, and these excavators 14 are connected to each other.

That is, connecting portions 15 are formed at four locations in the orthogonal direction on the outer periphery of the tail shield 12 of the excavator 14, and the connecting members attached to the opposing connecting portions 15 of the excavator 14 arranged in parallel. Drilling device C by rigidly connecting via
Is configured. The connecting member 16 only needs to be capable of rigidly connecting the adjacent excavators 14, and as shown in FIG. 4, it can be constituted by a pair of male and female members which fit in a groove. Unused connection in tail shield 12
A lid 17 is attached to 15, and the connecting portion 15 is
There is no intrusion of earth and sand and muddy water.

The main pushing device D is installed on the starting side of the reference pipe 1 and the connecting pipe B constituting the pipe roof A, and has a pushing wheel 21 which abuts on the rear end of the steel pipe 3 constituting the connecting pipe B;
It has a jack 22 for applying thrust to the pressing wheel 21 and a mounting table (not shown) on which the connecting pipe B is mounted. The pressing wheel 21 has a dimension capable of contacting all of the plurality of steel pipes 3 constituting the connecting pipe B, and can be driven by the jack 22 to propel the excavating device C and the connecting pipe B.

Next, a procedure for constructing the pipe roof A by connecting and burying the connecting pipe B with the reference pipe 1 buried underground will be described.

An original pushing device D is installed on the starting side of the reference pipe 1, and the excavator 14 is mounted on a mounting table of the device D, and a jack 22 is mounted.
, And the excavator 14 is propelled by moving the push wheel 21 forward in accordance with the drive. After the excavator 14 has been propelled, the push wheel 21 is pulled back, the reference pipe 1 is placed on the mounting table, and the excavator 14 is followed, and the jack 22 is driven again to propel the excavator 14 and the reference pipe 1. A predetermined number of wires are connected in the length direction and buried.

After the reference pipe 1 is buried, the main pushing device D is laterally moved to a position corresponding to the arrangement position of the connecting pipe B to be buried side by side with the reference pipe 1 and installed. The excavator C is constituted by connecting a number of excavators 14 in parallel via a connecting member 16. Then, the excavating device C is mounted on the mounting table of the main pushing device D, and the jack 22 is driven to be propelled underground.

After propelling the excavating device C, the push ring 21 is pulled back and the connecting pipe B is mounted on the mounting table. And connecting pipe B
The male joint 5 is fitted to one female joint 2 of the reference pipe 1, and in this state, the jack 22 is driven to advance the push wheel 21, thereby propelling the connecting pipe B. The coupling pipe B is guided by the female joint 2 of the reference pipe 1 in which the male joint 5 is already buried, and the propulsion direction is regulated.

At the time of propulsion, the steel pipe 3 from which the male joint 5 is provided
Resistance is applied to the male joint 5 of the steel pipe 3.
A rolling (rolling) force acts on the surface. However, connecting pipe B
Is formed by connecting a plurality of steel pipes 3 in parallel and connected to each other. For this reason, rotation of the connecting pipe B is prevented, and the propulsion is performed while maintaining substantially the same posture. Therefore, the connecting pipe B is buried while maintaining a stable propulsion direction and posture.

After the connecting pipe B adjacent to the reference pipe 1 is buried as described above, a new connecting pipe B is propelled adjacent to the already buried connecting pipe B in the same procedure as described above. Further, the connecting pipe B is arranged on the other female joint 2 side of the reference pipe 1 and propelled by the same procedure as described above. Connecting pipe B as described above
, It is possible to construct the pipe roof A shown in FIG.

The reference pipe 1 used for constructing the pipe roof A and the steel pipe 3 constituting the connecting pipe B are not long and are not limited to a long one. Therefore, when the length of the target tunnel is longer than the length, the reference pipe 1 and the connecting pipe B need to be welded and extended in the longitudinal direction. This welding operation is performed on site. For this reason, the welding positions of the steel pipes 1 and 3 on the pipe roof A are aligned in a straight line, which may not be preferable from the viewpoint of strength.

Therefore, the length of the pipe roof A is made of the steel pipe 1,
3 or more, as shown in FIG.
By displacing the longitudinal ends of the steel pipe 3 constituting
When a plurality of connecting pipes B are buried in the ground, it is preferable that the welding positions are not arranged in a straight line.

FIG. 6 (a) shows a connecting pipe B in which steel pipes 3 of the same length are shifted from each other by a predetermined length.
Shows a connecting pipe B constituted by using steel pipes 3 having different lengths. In this manner, by shifting the end of the steel pipe 3, the welding position can be arranged in a jig-zag manner, thereby avoiding a problem in strength.

[0036]

As described in detail above, in the method for constructing a pipe roof according to the present invention, after burying a reference pipe composed of one pipe, at least two pipes are connected adjacent to the reference pipe. By arranging the connected pipe and engaging and propelling both joints, a pipe roof based on the reference pipe can be constructed. In particular, since the connecting pipe is formed by connecting at least two pipes, it is possible to shorten the time required for the entire propulsion and to shorten the construction period.

In the connecting pipe according to the present invention, at least two steel pipes are arranged in parallel and are welded via a connecting member. Therefore, when a rotational force acts on the connecting pipe, a large resistance can be generated. Therefore, even when a force is generated at the joint protruding from the connecting pipe during propulsion and a force is applied to rotate the joint, the rolling does not occur against this force.

In particular, when the longitudinal ends of the steel pipes constituting the connecting pipe are shifted, the length of the pipe roof is larger than the length of the connecting pipe, and the connecting pipe is welded in the longitudinal direction. In the case of propulsion, welding positions are not arranged in a straight line, and a problem in strength can be avoided.

In the excavator according to the present invention, a connecting portion is provided at a predetermined position on the outer periphery of the tail shield for connecting to an adjacent excavator, and a plurality of excavators are connected via the connecting portion. It has features such as being able to excavate a tunnel for propelling the steel pipe constituting the pipe.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a method of constructing a pipe roof.

FIG. 2 is a plan view illustrating a state in which a connecting pipe is propelled.

FIG. 3 is a view taken in the direction of arrows III-III in FIG. 2;

FIG. 4 is a front view of the digging device with a partial cross section taken along line IV-IV of FIG. 2;

FIG. 5 is a diagram illustrating a configuration of a connecting pipe.

FIG. 6 is a diagram illustrating a connection state of a connecting pipe.

FIG. 7 is a diagram illustrating a configuration of a joint.

[Explanation of symbols]

 Reference Signs List A pipe roof B connecting pipe C excavating device D main pushing device 1 reference pipe 2 female joint 3 steel pipe 4 connecting member 5 male joint 11 shield body 12 tail shield 13 cutter head 14 excavator 15 connecting part 16 connecting member 21 press ring 22 jack

Claims (4)

[Claims] 1. A semi-shielded propulsion method embeds one reference pipe provided with a joint part at a predetermined position on the outer periphery at a reference position of a pipe roof to be constructed, and arranges at least two pipes in parallel. A connecting pipe provided with a joint portion over the entire length at a predetermined position on the outer periphery is arranged on the starting side, and a digging device for digging a tunnel corresponding to a pipe constituting the connecting pipe is arranged at a front end of the connecting pipe, The coupling part of the connecting pipe is engaged with a coupling part provided on the reference pipe, and then a thrust is applied to a pipe constituting the connecting pipe to be propelled along the reference pipe and buried. A method for constructing a pipe roof, characterized in that a joint part of a new connecting pipe is engaged with a joint part of the connecting pipe thus set and propelled and buried. 2. At least two steel pipes are arranged in parallel while maintaining a predetermined interval, and adjacent steel pipes are welded via a connecting member. Further, the steel pipes are connected to one end of one side of the connected steel pipes in the connection direction. The female pipe is provided with a female joint over the entire length,
A connecting pipe, wherein a male joint is provided over the entire length of the steel pipe located at the other end. 3. The connecting pipe according to claim 2, wherein longitudinal ends of at least two steel pipes are located at different positions. 4. An excavator having a shield body and a tail shield configured to be mutually refractible and having a cutter head for excavating the ground at the tip of the shield body and adjoining a predetermined position on the outer periphery of the tail shield. An excavating device, comprising: an excavator provided with a connecting portion for connection, wherein the excavating machine is arranged in parallel with the number of steel pipes constituting a connecting pipe and connected to each other via a connecting portion.