JPH0640713Y2 - Perforated propulsion tube - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a tubular body such as an electric cotton laying pipe, a gas pipe, and a water pipe that are buried in the ground by a propulsion method.

(Prior Art) Conventionally, in the case of arranging electric cotton, telephone wire, etc. in the ground, it is necessary to embed a plurality of small-diameter pipes in parallel in the ground and then dispose in the pipes. Is being done.

As a method of burying these pipes in the ground, after excavating a groove in the ground, a plurality of small-diameter pipes are laid in parallel in the groove vertically and horizontally, and the gap between adjacent pipes is formed. Backfill with concrete by filling the pipes with concrete to protect the pipes, or butt concrete blocks made by embedding multiple small diameter pipes in parallel between both end faces in the excavation groove. After connecting while keeping the state, backfilling, or after burying a large diameter fume pipe in the ground by the propulsion method, arranging multiple small diameter pipes in the fume pipe and filling the voids with concrete, etc. Has been adopted.

(Problems to be solved by the invention) However, according to the method of laying a small-diameter pipe body in the groove or the method of laying a concrete block body having a plurality of small-diameter pipe bodies in the groove, According to the method of burying a fume pipe and arranging a small-diameter pipe body in the fume pipe after the road and the like have to be excavated, traffic obstacles occur and a long construction period is required. Since the work of burying the fume pipe and the work of arranging the small-diameter pipe must be performed separately, a long-term work is required in the same manner as described above. Since the inside of the pipe is used, there is a problem that a fume pipe having a larger diameter than necessary is necessarily used.

Therefore, the inventors of the present application, as described in Japanese Patent Application No. 61-166264, provide a connecting step peripheral portion on the peripheral surfaces of both end portions of the pipe main body, and provide a plurality of connecting step peripheral portions inside the pipe main body. We have developed a tube for propulsion embedding in which a small-diameter hole is pierced in parallel with the length of the tube.

However, connecting this pipe to the rear end of the shield machine,
When excavating earth and sand excavated by a shield machine while discharging it with muddy water using a small diameter hole provided in the pipe body, rolling occurs in the shield machine and the pipe body to be connected due to the rotational reaction force of the cutter of the shield machine. The small-diameter holes in the plurality of pipes connected in series are connected in a spiral shape.

For this reason, when an electric wire is arranged in a conduit formed by these small-diameter holes and is energized, the electric wire is bent and power loss increases.

In addition, when installing a hydraulic hose for driving a shield machine, a power line, etc., because a small diameter hole is used, it is necessary to pass the hose, power line, etc. through the small diameter hole every time the pipe is connected. However, there is a problem that it is annoying.

The present invention aims to provide a perforated propulsion tube body that solves such problems.

(Means for Solving Problems) In order to achieve the above object, the multi-hole propelling tube body of the present invention is
As shown in the drawings corresponding to the embodiment, a plurality of small-diameter holes (3) are formed inside both end surfaces of the pipe main body (1), which penetrates in parallel in the longitudinal direction. A frequency member (5) is provided and a collar member (6) is integrally attached to the outer peripheral surface of the other end so as to project from the end surface of the pipe main body, and the cable housing groove is provided at a predetermined position on the outer peripheral surface of the pipe main body (1) over the entire length. (9)
And a U-shaped groove (9a) communicating with the cable housing groove (9) in the peripheral step portion (5) and the collar member (6).
U-shaped groove portions (9b) are formed so that the projecting portions of the collar member (6) are fitted to the pipe main body (1) peripheral step portion (5) through the packing (7) and the U-shaped groove portions are formed. The protrusion (9b) from the end surface of the pipe main body is configured to be fitted in the U-shaped groove (9a) of the pipe main body (1) to be connected.

(Function) A stepped peripheral portion (5) in which a rear end outer peripheral surface of the leading pipe main body (1) and a front end outer peripheral surface of the succeeding pipe main body (1) are provided at end portions
And the collar member (6) fitted to the stepped peripheral portion (5) are sequentially connected to each other, and when they are buried in the ground by the propulsion method, the collar member (6) of one pipe main body (1) is provided. By fitting the U-shaped groove (9b) into the U-shaped groove (9a) provided in the circumferential step (5) of the other pipe main body (1), the front and rear pipe main bodies (1) (1) All the small diameter holes (3) (3) provided on the outer circumference communicate with each other on the same center line, and at the same time, the cable housing grooves (9) (9) provided on the outer circumferential surfaces of these pipe main bodies (1) (1). ) Are also directly communicated with each other so that the pipe main bodies (1) and (1) can be joined smoothly and accurately and wirings such as cables can be stored easily.

Furthermore, the U-shaped groove (9a) of the front and rear pipe main body (1) (1) and U
The pipe main body (1) is prevented from rolling by fitting with the U-shaped groove (9b), and the collar having the U-shaped groove (9b) in the peripheral step (5) having the U-shaped groove (9a). Material (6)
Since the front and rear pipe main bodies (1) and (1) can be bent to each other without being rigidly connected, since the front and rear pipe main bodies (1) and (1) are fitted through the packing, control of the propulsion direction and curved propulsion can be performed easily. The workability is improved.

(Embodiment) Explaining an embodiment of the present invention with reference to the drawings, (1) is a concrete pipe main body, and a hole (2) is provided at the center thereof and the outer periphery thereof is centered on the hole (2). A plurality of small-diameter cable holes (3) (3) ... (3) are formed in the portion. These holes (2) and (3) are provided in parallel with each other in the longitudinal direction across both end faces of the pipe main body (1).

Such a pipe main body (1) is a cable arranging pipe (4) (4) made of a vinyl chloride pipe on the outer periphery of a cylindrical frame.
... are laid in parallel in the circumferential direction at predetermined intervals, then filled with concrete material and rotated by rotating the frame, and the hole is formed at the center by the centrifugal force (2 ) Can be used as a surveying hole when the pipe main body (1) is buried by the propulsion method, and the cable hole (3) is formed by the cable arranging pipe (4).

Further, the peripheral portion (5) is provided by forming the end portion of the length appropriately from the one end surface of the pipe main body (1) to a small diameter,
A steel collar member (6) having an outer diameter equal to that of the pipe main body (1) is integrally attached to the outer peripheral surface of the other end.

The collar member (6) protrudes from the other end surface of the pipe main body (1) by an appropriate length, and the inner peripheral surface of the collar member (6) is attached to the peripheral step portion (5) provided at one end of the pipe main body (1) to be connected. It is formed so as to be fitted through an annular rubber packing (7).

The annular rubber packing (7) is integrally fixed to the inner peripheral surface of the protruding portion of the collar member (6) and is embedded in the pipe main body (1) on the inner peripheral surface of one end of the collar member (6). An annular seal (8) made of water-expanded rubber is integrally attached.

(9) is a cable housing groove provided on the outer peripheral surface of the pipe main body (1) over the entire length, and a portion extending from one end surface of the collar member (6) to the peripheral step portion (5) is a C-shaped steel ( The C-shaped steel (10) is formed by embedding the C-shaped steel (10), and the U-shaped groove (9a) is engraved in the peripheral step portion (5) communicating with one end of the C-shaped steel (10). The peripheral portion of the collar member (6) communicating with the other end of is formed in a groove portion (9b) recessed in a U shape in substantially the same shape as the C-shaped steel (10).

The groove (9b) of the collar member (6) is formed so that it can be fitted into the U-shaped groove (9a) of the pipe main body (1) to be connected, and the upper and lower corners thereof are Curved in an arc (11)
By doing so, the compatibility with the packing (7) is improved.

(12) is a cover made of iron plate that closes the open end of the cable storage groove (9), and is a C-shaped steel (10) having both ends edges formed with the cable storage groove (9) at the time of burying and propelling the pipe main body (1). It is also welded to the groove (9b) of the collar member (6).

(13) is a lubricant injection hole penetrating the pipe main body (1) at an appropriate position on the outer peripheral portion, and connects the proper portion to the outer peripheral surface of the pipe main body (1) to connect the pipe main body (1) and the ground. Lubricant such as anti-friction material containing bentonite is injected into.

The perforated propulsion pipe of the embodiment thus configured is buried in the ground by a propulsion method by sequentially following a shield machine (not shown), and in this case, the preceding pipe main body (1)
By fitting the projecting end of the collar member (6) to the circumferential step (5) while fitting the grooves (9a) and (9b) between the pipe main body and the subsequent pipe main body (1), both pipe main bodies ( The small diameter cable (3) of 1) is connected in a straight line, and the hydraulic hose for driving the shield machine, the power line, etc. are stored in the groove (9) in series, and then the groove (9) is covered (12). It closes at and is then propelled underground.

During this propulsion, the shield machine and the following pipe main body (1) try to roll due to the rotational reaction force of the cutter of the shield machine, but the front and rear pipe bodies (1) (1) form a stepped peripheral portion (5). Since the U-shaped groove (9a) provided and the groove portion (6) provided in the collar member (6) are engaged with each other, rolling is prevented through this engaging portion.

Further, the center hole (2) is used as a position measurement hole of the shield machine during propulsion, the cable hole (3) is used as a discharge hole for excavated earth and sand, and a lubricant injection hole (1
By injecting an antifriction material between the pipe main body (1) and the ground through 3), the frictional resistance at the time of propulsion of the pipe body is reduced.

In this way, after burying a large number of pipe main bodies (1) connected in series, cables are laid in the small-diameter cable hole (3).

(Effect of the Invention) As described above, according to the multi-hole propelling pipe body of the present invention, a pipe having a plurality of small diameter holes (3) extending in parallel in the lengthwise direction between both end surfaces thereof. A frequency member (5) is provided on one outer peripheral surface of the main body (1), and a collar member (6) projecting from the end surface of the pipe main body is integrally attached to the other outer peripheral surface of the main body (1). A U-shaped groove (9a) and a U-shaped groove (9a) communicating with the cable accommodating groove (9) are provided in the circumferential step portion (5) and the collar member (6), and a cable accommodating groove (9) is provided in the portion over the entire length. Pipe main body (1) peripheral step (5) to which the groove (9b) is formed and the projecting portion of the collar member (6) should be connected
So that the U-shaped groove portion (9b) is fitted into the U-shaped groove (9a) of the pipe main body (1) to be connected while the U-shaped groove portion (9b) is fitted to the pipe main body through the packing (7). Since it is configured, when the pipe main body (1) is successively buried by embedding it in the ground by joining the opposing end faces to each other by the propulsion method, the pipe main body (1) is provided on the collar member (6) of one pipe main body (1). By fitting the protruding portion of the U-shaped groove portion (9b) that is formed into the U-shaped groove (9a) provided in the peripheral step portion (5) of the other pipe main body (1), the front and rear pipe main bodies (1) ) All the small diameter holes (3) and (3) provided in (1) can be accurately communicated with each other on the same center line, and at the same time, the cable provided on the outer peripheral surface of these pipe main bodies (1) Storage groove (9)
Also (9) can be directly communicated with each other.

Therefore, the pipe main body (1) (1) can be joined smoothly and accurately, and the power line or the like can be inserted through the small diameter holes (3) (3), the wiring work or the wiring for the cable storage groove (9) can be performed. It can be easily stored.

Furthermore, a U-shaped groove (9b) provided on the collar member (6) of one pipe main body (1) and a U provided on the peripheral step (5) of the other pipe main body (1). By fitting with the U-shaped groove (9a), it is possible to surely prevent the pipe main body (1) from being displaced and rolling during propulsion, and the collar on the circumferential step (5) having the U-shaped groove (9a). Since the member (6) is fitted through the packing (7), the front and rear pipe main bodies (1) and (1) can be bent together without being rigidly connected to each other, thereby controlling the propulsion direction and curving. Can be easily performed and the workability can be improved.

[Brief description of drawings]

The drawings show an embodiment of the present invention. FIG. 1 is a vertical sectional side view with a part thereof omitted, and FIGS. 2 and 3 are vertical sectional front views taken along lines AA and BB of FIG. 1, respectively. It is a figure. (1) ...... Pipe mainly, (2) ...... Center hole, (3) ...... Small diameter hole, (5) ...... Perimeter step, (6) ...... Color member,
(9) …… Cable storage groove, (9a) …… U-shaped groove, (9
b) ... Groove, (12) ... Lid.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-61-137996 (JP, A) Actually developed S61-73987 (JP, U)

Claims (1)

[Scope of utility model registration request] 1. A peripheral stepped portion (5) on one outer peripheral surface of a pipe main body (1) in which a plurality of small-diameter holes (3) are provided so as to extend parallel to the lengthwise direction between both end surfaces. And a collar member (6) projecting from the end surface of the pipe main body is integrally attached to the outer peripheral surface of the other end, and a cable storage groove (9) is provided at a predetermined position on the outer peripheral surface of the pipe main body (1) over the entire length. The cable receiving groove (9) is provided in the peripheral step portion (5) and the collar member (6).
A U-shaped groove (9a) and a U-shaped groove portion (9b) communicating with each other are formed, and packing (7) is formed in the pipe main body (1) peripheral step portion (5) to which the protruding portion of the collar member (6) is to be connected. ) And the U-shaped groove (9b) provided on the collar member (6).
The perforated propulsion pipe, characterized in that the protrusion from the end face of the pipe main body is fitted into the U-shaped groove (9a) provided in the peripheral step portion (5) of the pipe main body (1) to be connected. body.