JPH02279898A - Method and apparatus for constructing pipeline - Google Patents

Abstract

PURPOSE:To permit pipelines to be constructed concurrently by a method in which pipes are penetrated and set in a pit from a starting vertical pit to an arrival vertical pit by advancing excavators and the excavators are pushed out. CONSTITUTION:Excavators 12 are set at intervals in the directions of vertical to the direction from a starting vertical pit 72 to an arrival vertical pit 74 in the pit 72. The excavators 12 are concurrently advanced toward the pit 74 while excavating the ground. After the excavators 12 reach the pit 74, pipes 76 are concurrently penetrated by means of a pusher 14 into the excavated portion, and at the same time the excavators 12 are pushed out to the pit 74 for recovery.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a method and apparatus for simultaneously constructing a plurality of underground pipes without using the cut-and-cut method.

(Prior Art) When a plurality of electric wires such as power lines and telephone lines are placed in an underground conduit, a plurality of conduits are required to accommodate one or more electric wires. These conduits are constructed to run from one shaft to another.

One method for constructing such a plurality of pipelines is to excavate the ground with an excavator and advance the excavator along with the pipes to be placed in the excavation trace by a main pushing device.
There is a method of constructing a pipeline using the so-called pipe propulsion method.

(Problem to be solved) However, with this conventional construction method, one
Since only one pipeline can be constructed, the construction period will be longer if multiple pipelines are constructed.

SUMMARY OF THE INVENTION An object of the present invention is to provide a conduit construction method and apparatus that can simultaneously construct a plurality of conduits underground.

(Means for Solving the Problems and Functions and Effects of the Invention) The method of constructing a plurality of underground pipelines according to the present invention is characterized in that a plurality of excavation means are spaced apart from each other in a direction perpendicular to a direction from a starting shaft to a destination shaft. and placing the pipe in the starting shaft, simultaneously moving the excavating means from the starting shaft toward the destination shaft while excavating the ground by the excavating means, and then placing the pipe in the excavation site by the excavating means. .

An apparatus for constructing a plurality of underground pipelines according to the present invention includes a plurality of elongated excavation means including a cylindrical casing and an excavator disposed inside the casing, and a drive means for rotating the excavator. and a source pushing means for supporting the excavating means in parallel so that the excavating means are arranged at intervals in a direction perpendicular to the elongated direction thereof, and simultaneously advancing the excavating means in the elongated direction. including.

The excavation means is simultaneously advanced from the starting shaft toward the reaching shaft while excavating the ground between the starting shaft and the reaching shaft,
The pipe is placed in the excavation site of the excavation means. Therefore, according to the present invention, a plurality of conduits can be constructed simultaneously and in a short period of time.

After the tip of the excavation means reaches the reaching shaft, the pipe can be placed in the excavation trace by pushing the pipe into the excavation trace using the pushing means. In this case, the excavation means can be pushed out into the reaching shaft at the same time.

The method of constructing a plurality of underground pipelines of the present invention also includes:
A first excavation means is disposed in a starting shaft, and while excavating the ground with the first excavation means, the first excavation means is advanced from the starting shaft to the arrival shaft, and then a plurality of second excavation means are arranged in the starting shaft at intervals with respect to each other and the first excavating means in a direction perpendicular to the direction from the starting shaft to the reaching shaft, and while the ground is being excavated by the second excavating means, and Using the first excavation means as a guide, the second excavation means is simultaneously advanced from the starting shaft to the arrival shaft, and then the pipe is placed in the excavation trace by the first and second excavation means. Including.

According to this construction method, the second excavation means is advanced while being guided by the first excavation means, so even if the distance between the shafts is long, multiple pipelines parallel to each other can be constructed in a short period of time. be able to.

The source pushing means includes a base disposed in the starting shaft, a reaction body connected to the base, a movable body disposed on the base so as to be movable in the horizontal direction, and one end of which is connected to the reaction force. The apparatus may include a plurality of jacks fixed to the body and connected at the other end to the movable body to reciprocate the movable body in the horizontal direction.

Furthermore, it is preferable to include a position maintaining mechanism that releasably maintains the position of the reaction force body in the direction of expansion and contraction of the jack with respect to the base. As a result, after extending the jack, the maintenance of the position of the reaction force body relative to the base is released, and then the reaction force body is advanced relative to the base while contracting the jack, and the reaction force body against the base is Since the position of can be changed, a jack with a short stroke can be used.

The position maintenance mechanism may include a jack supported by the reaction body and a pin moved by the jack into releasably engagement with the reaction body.

The excavator can include a screw conveyor located within a casing and rotated by a driving means, and a plurality of bits attached to the tip of the screw conveyor.

The driving means can include a rotation source provided for each excavator.

(Example) Referring to FIGS. 1 and 2, a construction apparatus 10 includes a plurality of excavating rigs 12 and a main pusher 14 that advances the excavating rigs. In the illustrated example, six excavation rigs 12 are supported by the main pusher 14.

As shown in FIG. 3, each excavation device 12 includes a cylindrical first casing 16 disposed at the most distal end, and a cylindrical first casing 16 connected to the rear end of the first casing by screwing or the like. a second casing 18; a cutter 2 rotatably disposed within the first casing 12 about the axis of the first casing;
o, connected to the rear end of the cutter 20 to constitute an excavator such as an earth auger together with the cutter, and disposed within the second casing 18 so as to be rotatable about the axis of the second casing. A screw conveyor 22 is provided.

The distal end of the first casing 16 is sharpened so as to form a cylindrical cutter. However, a cutter may be arranged on the outer periphery of the tip of the first casing 16.

As shown in FIGS. 1 and 2, when the distance excavated by the excavation device 12 becomes the same length dimension as the second casing 18, a second casing of the same type as the second casing 18 and the screw conveyor 22 is removed. and a screw conveyor are connected to the rear of each excavation rig 12, thereby increasing the length of the excavation rig 12. The second casing 18 to which the first casing 16 is attached is attached to the fourth casing 18.
As shown in the figure, these may be connected by a connecting member 24 so that they extend parallel to each other and are immovable relative to each other.

The original pusher 14 includes a base 26 . The base 26 is made up of a plurality of elongated shapes connected to each other so as to extend along the edges of the cube. A pair of reaction force bodies 28 are mounted on the base 26.
are disposed on the sides of the base 28 in the width direction so as to be movable in the direction in which the excavation device 12 excavates.

Each reaction force body 28 includes a pair of guide rods 3 attached to the base 26 so as to extend in the excavation direction of the excavation device 12.
It is supported by 0. Each guide rod 30 is attached to the base 24 by stops 32 at both ends thereof.

As shown in FIGS. 5 and 6, the reaction force body 28 includes a cubic frame 34 and a pair of arms 36 extending in opposite directions from the vertical ends of the frame.
and a boss portion 38 attached to the tip of the arm. The guide rod 38 slidably passes through the boss portion 38.

A pair of position maintaining mechanisms 40 that releasably maintain the position of the reaction force body 28 in the direction in which the excavation device 12 excavates is attached to the reaction force body 28 .

Each position maintaining mechanism 40 includes a jack 42 attached to the frame 34 so that the direction of expansion and contraction is the vertical direction, and a pin 46 connected to the tip of a piston rod 44 of the jack by a pivot.

One of the position maintaining mechanisms 40 is arranged so that the bottle 46 projects upwardly from the frame 34 when the jack 42 is extended, and the other is arranged so that the bottle 46 projects upwardly from the frame 34 when the jack 42 is extended. It is located. For this purpose, a hole is bored in the frame 42 to receive the bottle 46, and a plate 48 is attached to reinforce the periphery of the hole.

Holes for receiving the bottles 46 of the position maintenance mechanism 40 are bored at multiple locations on the base 26 at intervals in the longitudinal direction of the excavation device 1.2, and the holes for receiving the bottles 46 of the position maintenance mechanism 40 are drilled in the locations where the holes are drilled. A plate 50 is attached to reinforce the periphery of the hole. bottle 4
6 is inserted into one of the holes formed in the base 25 and engaged with the base 24. The reaction force body 28 is the bottle 4
6 is prevented from moving relative to the base 24 by engagement with the base 24, but the jack 42 allows the bottle 46 and the base 24 to be prevented from moving relative to the base 24.
4, it becomes movable relative to the base 24.

A movable body, that is, a push ring 52 is also disposed on the base 26 so as to be slidable in the direction in which the excavation device 12 excavates in front of the position of the reaction force body 28 . A plurality of propulsion jacks 54 are arranged between the push ring 52 and each reaction body 28.

The cylinder of the jack 54 is connected to the push ring 52, and the piston rod is connected to the reaction body 28. Note that the cylinder of the jack 54 and the piston rod may be connected in the opposite manner to the above.

A plurality of connectors 56 are attached to the push ring 52 to secure the excavation device 12 to the push ring. connector 56
As shown in FIG. 7, it is composed of a pair of plates 58, 60 that are arranged to face each other, and a plurality of rod-shaped members 62 that fixedly connect the plates to each other. Opposite holes 64,66 are drilled in the plates 58,60.

The connector 56 is attached to the front surface of the push ring 52 on the plate 60. On the front side of the plate 56, the rearmost second casing of the drilling rig 12 is removably attached. The rear of the screw conveyor of the drilling rig 12 is received between the holes 64 and the plates 58,60.

A slider 68 is further disposed on the base 26 between the push ring 54 and the reaction body 28 so as to be slidable in the direction in which the excavation device 12 excavates. The slider 68 is connected to the cylinder of the jack 54, and as the jack 54 expands and contracts, the slider 68 moves with the cylinder of the jack to the excavating device 12.
It is moved in the direction of excavation by.

A plurality of rotation mechanisms 70 are supported by the slider 68. The rotation mechanism 70 is provided for each excavation device 12. The rotation shaft of the rotation mechanism 70 extends through the push ring 52 to the connector 56, and is connected to the rear end of the screw conveyor of the excavation rig 12 at the connector 56.

For this reason, the screw conveyor of the excavation device 12 is rotated by the rotation mechanism.

When excavating with the excavation device 12, first, as shown in FIG. 8, an operation is performed to excavate the earth and sand between the starting shaft 72 and the reaching shaft 74.

In order to perform this work, the construction device 10 is installed in the starting shaft 72 so that the direction of excavation by the excavating device 12 is from the starting shaft 72 to the destination shaft 74.

Next, the reaction force body 28 is moved to the base 24 by the position maintaining mechanism 40.
The propulsion jack 54 is extended while remaining stationary. As a result, the push ring 52 and the slider 68 are moved forward, so that the excavating device 12 is moved forward at the same time. When the excavation rig 12 moves forward, the rotation mechanism 70 is driven, so that the screw conveyor and cutter of the excavation rig 12 are rotated. This excavates the earth and sand.

When the jack 54 is extended by a predetermined amount, the position maintaining mechanism 40
The jar 46 is disengaged from the base 24 by the jack 42, and the propulsion jack 54 is retracted in this state. As a result, the reaction body 28 is advanced a predetermined distance, and the bottle 42 is inserted into another hole in the base 24 at that position. In this state, the propulsion jack 54 is extended again.

When the drilling rig 12 is moved a distance equal to the length dimension of the second casing, the casing of the drilling rig 12 and the screw conveyor are disengaged from the connector 56 and the rotation mechanism 70 and then the reaction body 28 is returned to its initial position. With the bin 46 of the position maintaining mechanism 40 disengaged from the base 24, the reaction body 20, push ring 52, and slider 68 may be moved back manually or by the propulsion jack 54.

Once the reaction body 28 is returned to the predetermined position, a new second casing and screw conveyor are connected to the rear end of the excavation rig 12, and then the process is repeated. As a result, the excavating device 12 is simultaneously advanced from the starting shaft 72 toward the reaching shaft 74, as shown in FIG. 8(A).

The excavated material by the excavation device 12 is transported to a screw conveyor 22.
As a result, it is transported to the connector 56 and falls from the space provided in the connector 56.

The above steps are repeated until the tip of the excavation device 12 reaches the reaching shaft 74, as shown in FIG. 8(B). As a result, earth and sand between the starting shaft 72 and the reaching shaft 74 are excavated.

Drilling equipment! 2 reaches the reaching shaft 74, only the rotation mechanism 70 is activated. As a result, the screw conveyor 22 is operated, so that the excavated material in the excavation device 12 is conveyed to the starting shaft 72.

Next, the pipe 76 is pushed into the excavation site by the excavation device 12. For this operation, the second casing 1
A pipe 76 having the same dimensions as 8 is placed at the rear end of the excavating rig 12, and then the main pushing device 14 advances the pipe 76 together with the excavating rig 12, as shown in FIG. 8(C). After pushing out the front end into the reaching shaft 74, the process of separating and removing the pushed out tip of the excavating rig from the reaching shaft 74 is repeated. As a result, Fig. 8(D)
As shown, a plurality of conduits 78 are constructed between the shafts 72 and 74.

The operation of pushing the pipe 76 into the excavation site can be carried out by operating the main pushing device 14 in the same manner as when excavating with the excavation device 12 while the rotation mechanism 70 is inactive.

When the distance between the shafts 72 and 74 is long, it is sufficient to use one excavation rig as a guide while advancing the remaining excavation rigs.

In order to implement such a construction method, first of all, as shown in Fig. 9 (A)
and one drilling rig 12 as shown in FIG. 9(B).
is advanced to excavate the earth and sand between shafts 72 and 74.

In addition, in FIG. 9(A) and FIG. 9(B), the conventional main pushing device 80 is used, but the main pushing device 14 of the present invention is used.
can be used. In this case, it is sufficient to operate any one drilling rig.

Then, with the first drilling rig 12 left in place,
Using the first drilling rig 12 as a guide, the remaining drilling rigs 12 are advanced to excavate the earth between the shafts 72, 74, as shown in Figures 9(C) and 9(D). .

Thereafter, as shown in FIGS. 9(E) and 9(F), the pipe 76 is pushed into the excavated area by the excavating device 12. This operation is the same as the operation in the embodiment shown in FIG.

When advancing the remaining drilling rigs, for example, a ring 8 shown in dotted line in FIG.
2 is slidably fitted, other drilling rigs around the first advanced drilling rig are connected to the ring 82 by couplings, and adjacent drilling rigs are coupled to the coupling. Stiffness allows the construction of multiple parallel conduits.

[Brief explanation of drawings]

FIG. 1 is a plan view showing one embodiment of the construction device of the present invention, FIG. 2 is a front view of the construction device shown in FIG. 1, FIG. 3 is an exploded view of the excavation device, and FIG. 5 is a front view showing an embodiment of the reaction force body, FIG. 6 is a right side view of the reaction body shown in FIG. 5, and FIG. 7 is a view of the connector. A perspective view showing one embodiment, FIG. 8 is a diagram for explaining a construction method of the present invention, and FIG. 9 is a diagram for explaining another construction method of the present invention. 10: Construction equipment, 12: Drilling equipment, 14: Main push equipment, 162 casing, 20: Cutter,
22 Niscrew conveyor, 26: Base, 2
8 two reaction force bodies, 40: position maintenance mechanism, 52: moving body, ie push ring, 54: propulsion jack, 70: rotation mechanism.

Claims (9)

[Claims] (1) A method of constructing a plurality of pipes underground, in which a plurality of excavation means are arranged in the starting shaft at intervals in a direction perpendicular to the direction from the starting shaft to the destination shaft, and the excavating means A method for constructing a pipeline, the method comprising: simultaneously advancing the excavation means from a starting shaft toward a destination shaft while excavating the ground by means of the excavation means; and then placing a pipe in an excavation trace by the excavation means. (2) After the tip of the excavation means reaches the reaching shaft, the pipe is pushed into the excavation trace by a push means, thereby arranging the pipe in the excavation trace, and moving the excavating means into the reaching shaft. The method for constructing a conduit according to claim (1), which comprises extruding. (3) A method of constructing multiple pipes underground, the first
A plurality of excavating means are disposed in the starting shaft, the first excavating means is advanced from the starting shaft to the reaching shaft while excavating the ground by the first excavating means, and then a plurality of second excavating means are arranged in the starting shaft. are arranged in the starting shaft at intervals with respect to each other and the first excavating means in a direction perpendicular to the direction from the starting shaft to the reaching shaft, and while excavating the ground by the second excavating means and the first excavating means. using the first excavating means as a guide, the second excavating means is simultaneously advanced from the starting shaft to the reaching shaft, and then the pipe is placed in the excavation trace by the first and second excavating means. Conduit construction methods, including: (4) A device for constructing a plurality of underground pipelines, comprising a plurality of elongated excavation means including a cylindrical casing and an excavator disposed within the casing, and a drive for rotating the excavator. and a source for supporting the excavating means in parallel so that the excavating means are spaced apart from each other in a direction perpendicular to the longitudinal direction thereof, and for simultaneously advancing the excavating means in the longitudinal direction thereof. and means for constructing a conduit. (5) The source pushing means includes a base disposed in the starting shaft, a reaction body connected to the base, a movable body disposed movably in the horizontal direction on the base, and one end of which is disposed in the starting shaft. a plurality of jacks fixed to the reaction force body and connected at the other end to the movable body to reciprocate the movable body in a horizontal direction;
The conduit construction device according to claim (4). (6) The conduit construction device according to claim (4), further comprising a position maintenance mechanism that releasably maintains the position of the reaction force body in the direction of expansion and contraction of the jack with respect to the base. (7) The position maintaining mechanism includes a jack supported by the reaction force body, and a pin moved by the jack to releasably engage the reaction force body. Pipe construction equipment. (8) The pipe according to claim (4), wherein the excavator includes a screw conveyor located within the casing and rotated by the agitation means, and a plurality of bits attached to the tip of the screw conveyor. Road construction equipment. (9) The pipeline construction device according to claim (4), wherein the drive means includes a rotation mechanism provided for each excavator.