JP2000179285A - Jack equipment installation method in station type jacking method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a jack equipment installation method in a station type jacking method in which in the case where a pit can not be bored in a road where an underground pipe is buried, a box is constructed from a pit shifted from a planning line on the road where to jack and bury the underground pipe, and the underground pipe is jacked and buried from the interior of the box. SOLUTION: According to this jack equipment installation method in a station type jacking method, a box 2 is constructed from a pit shifted from a planning line for jacking and burying an underground pipe 1 to a position where a schedule jacking hole 5 of the side wall of the box 2 and the planning line agree, and taking the box as a station, the underground pipe 1 is jacked and buried from the jacking hole 5. In the method, an installation hole 6 larger than the outside diameter of the underground pipe 1 is provided on one side or both sides of the side wall of the box 2 head part, and after the completion of constructing the box 2, an installation pipe 7 is jacked and buried from the installation hole 6 by jacking construction to a designated length, and a jack 10 is installed in the installation pipe 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a case in which a shaft is constructed on a road where a buried pipe is to be buried by constructing a housing from a shaft which is provided off a plan line on a road where a buried pipe is to be buried. The present invention relates to a method of installing a main pushing device of a station type propulsion method for burying a buried pipe from a housing.

[0002]

2. Description of the Related Art In the propulsion method, a buried pipe is sequentially connected to a rear end of a leading conductor having a digging mechanism at a tip, and a propulsion burial is performed while pushing a rear end face of the buried pipe with a main push jack provided in a starting shaft. At the starting point of the buried pipeline, a starting shaft for hanging down the conductor and pipe is built,
At the end point, a reaching shaft is established on the road to collect the leading conductor installed at the tip. For this reason, the propulsion method is often adopted as a method of building pollution that is only occupied by a shaft on the road. However, in large metropolitan areas, starting shafts and reaching shafts built on the road may cause large traffic congestion, making it impossible to build a shaft as a construction base on the road where buried pipes are buried. There is.

For this reason, a station-type propulsion method has been developed in which a construction base such as a shaft is not provided on the road where the buried pipe is propelled and buried, and it has become possible to carry out propulsion work with less construction pollution such as traffic congestion. The construction method of the station type propulsion method, as shown in Fig. 3, is required to bury the pipe 1 on the planned line under the line by propulsion burying the box 2 using the open space beside the line. A vertical shaft 14 is cut and provided. The shaft 14 is provided with a supporting wall 15, a jack device 16, and the like necessary for a conventional propulsion method. Next, the housing 2 is propelled to a position where the planned propulsion hole in the side wall of the housing 2 coincides with the planned line of the buried pipe 1 below the route. When the promotion of box 2 is completed,
The buried pipe 1 is propelled along the planning line from the propulsion hole. The inner diameter of the housing 2 is determined by the height at which the buried pipe 1 to be buried and the leading conductor can be transported within the housing 2, and the width is the length of the buried pipe 1 to be buried and the original push jack. The length is determined in consideration of the length, the thickness of the reaction wall 15, and the like. The original push jack length requires a stroke capable of pushing the length of one buried pipe 1 at a time in order to perform efficient propulsion construction, and the length of the jack body becomes relatively long.

[0004] The propulsion hole may be installed after the completion of the propulsion of the box 2, or may be set in advance at the stage of manufacturing the box 2, temporarily closed when the box 2 is propelled, and removed. It is also possible to take.

[0005]

With the station-type propulsion method described above, there is no shaft or the like serving as a construction base on the road, and traffic congestion due to construction does not occur as in the prior art. However, it is necessary to use a long-stroke original push jack in order to efficiently promote the construction of buried pipes.
The housing production cost and the propulsion construction cost increased remarkably, and it became more expensive than the propulsion construction cost of the buried pipe which is the main construction,
It is difficult to adopt this method. In addition, the increase in the cross section of the housing results in a problem that the shape of the shaft is enlarged, the shaft construction cost is increased, and it is difficult to secure a place where the shaft is installed.

Therefore, the present invention provides a method of installing a main pushing equipment of the station type propulsion method, which is economical and has less construction pollution by minimizing the cross section of the housing of the station type propulsion method without excavating the shaft on the road. Is what you do.

[0007]

That is, according to the present invention, a housing is provided from a vertical shaft provided at a position deviating from a plan line for burying a buried pipe to a position where the planned propulsion hole on the side wall of the housing coincides with the plan line. A method of installing a main pushing facility of a station type propulsion method in which a body is constructed and a buried pipe is propelled and buried from the propulsion hole using the box as a station, wherein the buried pipe is buried on one side or both sides of a side wall of the top of the box. A station where an installation hole larger than the pipe outer diameter is provided, and after the construction of the housing is completed, the equipment pipe is propelled and buried to a predetermined length by propulsion construction from the installation hole, and the main push jack is installed in this equipment pipe This is the installation method of the main pushing equipment of the type propulsion method.

The housing is designed to have a width in consideration of the length of the buried pipe and the thickness of the starting wellhead wall of the propulsion hole and the pressing ring. The installation hole provided in the side wall at the top of the housing is provided at a position coinciding with the plan line of the buried pipe to be buried, and is planned to be larger than the outer diameter of the buried pipe with a margin. When the buried pipe is buried from both sides of the box, the installation holes are provided on both side walls of the box and also serve as the propulsion holes. When the embedding of the buried pipe is performed on only one side, a propulsion hole slightly larger than the outer diameter of the buried pipe is installed at the position of the planned line where the buried pipe is buried. Waterproof rubber or the like is provided in the propulsion hole in order to prevent inflow of earth and sand or groundwater from a gap with the outer periphery of the buried pipe.

From the installation hole, a blade or the like is provided at the tip of the installation tube, and the installation tube is propelled and buried to a predetermined position by a propulsion method or the like. The propulsion length of the installation pipe is determined in consideration of the length of the original push jack having a stroke corresponding to the length of the buried pipe to be buried and the thickness of the reaction wall. In the installation pipe, an original pushing jack is arranged by a support frame or the like so that the end face of the buried pipe and the jack head coincide with each other.

For the construction of the box, a method of constructing the box integrally formed of concrete or steel by a propulsion method may be used, or the box may be constructed by connecting and connecting pipes of circular or rectangular cross section. It is also possible to use a method in which a body is formed and reinforced by a support while excavating the housing.

In the method of installing the main pushing equipment of the station type propulsion method according to the present invention, the housing to be a station can be determined by a width having a margin for the length of the buried pipe, and the minimum housing cross section is obtained. The shaft shape for building the body can also be improved with small dimensions. When the construction of the housing is completed, the equipment pipe will be constructed by the propulsion method from the installation hole in the side wall of the housing, and the tip of the equipment pipe will have a reaction wall made of steel or concrete. In the equipment pipe, a main push jack is installed that matches the propulsion force calculated by the relation of the buried pipe and the propulsion extension, and the buried pipe is sequentially buried underground using the reaction wall as a supporting force . At this time, a waterproof rubber for preventing inflow of groundwater or the like is installed in the propulsion hole on the opposite side wall.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view for explaining a method of installing the main pushing equipment of the station type propulsion method of the present invention.
A box 2 having a predetermined cross section is installed on a shaft 12 provided at a position deviating from a plan line for propelling and burying the buried pipe 1, and the center line of the plan line and the propulsion hole 5 provided on the side wall of the box 2. The box 2 is buried and constructed until the position where と coincides. Box 2
At the tip of the blade, a cutting edge 3 for reducing penetration force into the ground is provided, and shelf members are arranged in a lattice shape depending on soil conditions in order to stabilize the face. When the construction of the housing 2 is completed, concrete or the like is poured into the cutting edge 3 portion of the tip face, and the protective wall 4 is constructed. Then, a facility pipe 7 having a predetermined length is propelled underground by a jack provided in the housing 2 from an installation hole 6 provided on a side wall portion opposite to the propulsion hole 5. A cutting edge 8 having a lattice-shaped shelf member is also provided at the tip of the equipment pipe 7. When the construction of the equipment pipe 7 is completed, the reaction wall 9 is constructed by casting concrete at the cutting edge of the face. A main push jack 10 is installed in the equipment pipe 7, and the excavator and the buried pipe 1 are sequentially propelled and buried from the propulsion holes 5 provided in the side wall of the housing 2.

In the above embodiment, the method of constructing the housing 2 by the propulsion construction has been disclosed. However, a small-diameter pipe having a circular or rectangular cross section is connected to form the housing 2 cross section, and the housing 2 is reinforced by a supporter or the like. It is also possible to use a tunnel construction method for excavating the inside of the housing 2.

The construction length of the equipment pipe 7 is determined by the length of the original push jack 10 installed in the equipment pipe 7.
In order to carry out efficient propulsion burying, the original push jack 10 having a stroke for pushing out one buried pipe 1 is required, and the equipment pipe 7 becomes a little longer.

In the propulsion hole 5 and the installation hole 6, a starting wellhead wall 12 provided with a waterproof rubber is installed so that earth and sand and groundwater do not flow into the housing 2 through a gap between the buried pipe 1 and the equipment pipe 7. 13
Is provided.

FIG. 2 is a view taken along the line AA in FIG. On the side wall of the tip of the housing 2, a facility pipe 7 is provided.
And a predetermined length in a direction perpendicular to the direction. In the equipment pipe 7, a support frame (not shown) or the like is disposed so that the end face of the buried pipe 1 propelled and buried from the opposite side to the equipment pipe 7 and the head of the original push jack 10 coincide. In the present embodiment, the number of the main push jacks 10 is set to four. However, the number can be increased or decreased by examining the pipe diameter and extension of the buried pipe 1 to be buried and the soil conditions.

The width of the housing 2 is determined by the length of the buried pipe 1 and the length of the propulsion hole 5 in order to install the original push jack 10 device in the equipment pipe 7.
Is determined by the thickness of the starting well wall 12 and the thickness of the pressing wheel 11 installed between the buried pipe 1 and the jack head. For this reason, the cross section has a minimum cross section as compared with the conventional case, and a small shaft is sufficient for the shaft 14 which is a work base for constructing the housing 2.

Further, in the present embodiment, the unidirectional propulsion of the buried pipe 1 is disclosed on one side only. However, when the propulsion is performed in both directions from the side wall of the housing 2, the propulsion hole 5 is installed instead. Holes 6 are provided on both sides, and facility pipes 7 are constructed on both sides by propulsion construction. A reaction wall 9 for supporting the reaction force of the original pushing jack 10 is formed on the face portions on both sides of the equipment pipe 7. The reaction wall 9 at the place where the buried pipe 1 passes may be provided with a starting wellhead wall 1 for the buried pipe 1 in advance. Is required.

[0019]

As described above, according to the method of installing the main pushing equipment of the present invention, it is possible to minimize the cross section of the box to be constructed, and to significantly reduce the box manufacturing cost and the propulsion construction cost. Can be. In addition, since the cross section of the housing can be made smaller, the shaft, which is a work base for constructing the housing, also becomes smaller, which is more economical. In addition, as the shaft size has become smaller, it has become easier to secure a place to install a shaft next to the line.

[0020]

[Brief description of the drawings]

FIG. 1 is a plan view for explaining a method of installing a main pushing facility of a station type propulsion method of the present invention.

FIG. 2 is a view taken in the direction of arrows AA in FIG.

FIG. 3 is a plan view illustrating a conventional station-type propulsion method.

[Explanation of symbols]

 DESCRIPTION OF REFERENCE NUMERALS 1 buried pipe 2 housing 3 cutting hole 4 protective wall 5 propulsion hole 6 installation hole 7 equipment pipe 8 cutting hole 9 reaction wall 10 main push jack 11 press ring 12 propulsion hole start well wall 13 installation hole start well wall 14 Shaft 15 bearing wall 16 jack device

Claims (1)

[Claims] 1. A box is constructed from a shaft provided at a position deviated from a plan line for burying a buried pipe to a position where the planned propulsion hole on the side wall of the box coincides with the plan line. A method of installing a main pushing equipment of a station type propulsion method in which a buried pipe is propelled and buried from the propulsion hole as a station, wherein an installation hole having a diameter larger than a buried pipe outer diameter is provided on one or both sides of a side wall of the box head. After the construction of the housing has been completed, the station type propulsion method is characterized in that the equipment pipe is propelled and buried to a predetermined length by propulsion construction from the installation hole, and the main push jack is installed in this equipment pipe. How to install the main pushing equipment.