JP4809814B2 - Excavator, recovery method of excavator, construction method of pipeline - Google Patents

Description

  The present invention relates to an excavator used for constructing a pipe line by a propulsion method toward a reach shaft such as a manhole or an existing structure, a recovery method thereof, and a pipe construction method using the excavator.

  A conventional excavator is a jack that arranges a cutter at the tip of the skin plate, installs a drive unit and a soil removal device to rotate the cutter inside the skin plate, divides the skin plate back and forth, and corrects the excavation direction. Connected structures are generally used, one that separates and collects at the skin plate division position, and the other that collects only internal equipment such as cutters and drive units and leaves the skin plate in the ground. It is made in. The reach shaft is constructed to the smallest dimension that the excavator can separate.

By the way, the above-described prior art has the following problems.
1) When the excavator is separated and recovered, it is necessary to construct a reaching shaft for recovering the excavator when it is joined to an existing structure, resulting in an increase in construction costs.
2) In the excavator that is separated and recovered, when the existing structure is reached, the excavator cannot be recovered, resulting in a total loss and an increase in construction costs.
3) In the excavator that is left in the ground, it often takes time to produce it, and it is often not in time for the construction period.
JP 2006-37595 A

  The problem to be solved by the present invention is to solve these conventional problems and to provide an excavator that can be used for both separation and recovery and underground storage.

The configuration of the present invention that solves this problem is as follows.
1) A jack that arranges the cutter through the bulkhead at the tip of the skin plate, installs the drive unit and earth removal device that rotates the cutter inside the skin plate, divides the skin plate back and forth, and corrects the direction of digging In an excavator that is connected and propelled by a propulsion pipe, drilling a natural ground and constructing a pipeline in the ground, the cutter, drive unit, bulkhead, and soil removal device can be disassembled. The reinforcing block having a predetermined thickness is attached to the inner surfaces of the front and rear skin plates in a partially and detachable manner, and the jack is detachably attached to the positions of the adjacent reinforcing blocks on the front and rear skin plates. Machine 2) The excavator 3) described in 1) above, wherein the inner surface of the skin plate is divided into a plurality of sections in the front-rear direction, and reinforcing blocks are attached adjacent to the front and rear sections. Drill the ground with the excavator described in 1) or 2), and propel it until the front skin plate of the excavator is exposed to the vertical shaft, separating the front skin plate from the rear skin plate. Then, the front part is recovered from the reaching shaft, further propelled until the skin plate at the rear of the excavator is exposed to the reaching shaft, and the skin plate at the rear of the excavator is separated from the subsequent propelling pipe and recovered from the reaching shaft. The excavator recovery method 4) The excavator described in 1) or 2) above is drilled and propelled until the tip of the excavator is exposed to the vertical shaft. Remove the drive unit and earth removing device, disassemble and collect from the reach shaft, remove the jack and reinforcement block from the skin plate and collect it on the reach shaft or start shaft side, and leave the skin plate in the ground, It was bore wall by attaching a finishing block propulsion tube the same quality on the inner surface of Plates, in how to build a pipeline.

According to the present invention, the following effects can be obtained.
1) Since the excavator can be disassembled, the reaching shaft for recovery can be made smaller, the choice of construction position can be expanded, and the construction cost can be reduced.
2) When it reaches the existing structure, since the parts other than the skin plate can be recovered and reused, the construction cost can be reduced.
3) Since only the propelling pipe and finishing block need to be manufactured other than the excavator, these members do not need to be prepared before construction, and can be produced according to the progress of the construction, and respond promptly after ordering the propulsion work. it can.

  In the present invention, the axial load bearing force during propulsion is generated by the combination of the skin plate and the reinforcing block. However, the skin plate can be made thin by using the reinforcing block, and when the skin plate is left in the ground, the reinforcing block is used. The cost is reduced by collecting. In addition, since both the reinforcement block and the finishing block can be attached to the inner surface of the skin plate, even when the plan is changed from the excavator collection to the underground storage during propulsion, it can be flexibly dealt with. Embodiments of the present invention will be specifically described below with reference to the drawings.

  1 is an explanatory diagram of the excavator of the embodiment, FIG. 2 is a front view of the excavator of the embodiment, FIG. 3 is a cross-sectional view taken along the line AA of FIG. 1, and FIGS. FIG. 6 is an explanatory diagram showing fixing of the finishing block of the embodiment. In the figure, 1 is an excavator, 2 is a skin plate, 2a is a main pipe, 2b is a follower pipe, 3 is a cutter, 4 is a drive unit, 5 is a partition, 6 is a soil removal device, 7 is a support member, 8 is a jack, 9 is a reinforcing block, 10 is a finishing block, 11 is a propulsion pipe, 12 is a cylindrical portion, 13 is a bolt, G is a natural ground, and T is a reaching shaft.

  As shown in FIGS. 1 to 3, the excavator 1 according to the present embodiment divides a cylindrical steel skin plate 2 into a front main pipe 2a and a rear sub pipe 2b, and the inner surfaces of the main pipe 2a and the sub pipe 2b. The steel reinforcement block 9 having a predetermined thickness is detachably attached to the division of the main pipe 2a and the secondary pipe 2b with bolts (not shown), and the positions of the reinforcement blocks 9 adjacent to each other in the front-rear direction. The four jacks 8 for correcting the direction of excavation are detachably attached, and the main pipe 2a and the secondary pipe 2b are detachably connected.

  The cutter 3, the drive unit 4, and the partition wall 5 are detachably attached to the main pipe 2 a, and the earth removing device 6 is detachably attached to a predetermined height position by the support member 7 over the main pipe 2 a and the slave pipe 2 b. The cutter 3, the drive unit 4, the partition wall 5, and the soil removal device 6 have a structure that can be disassembled.

  In the present embodiment, when separating and recovering, the ground pipe G is constructed by drilling the natural ground G while propelling the excavator 1 with the propulsion pipe 11 following it. When the main pipe 2a is propelled until it is exposed to the reaching shaft T, as shown in FIG. 4A, the front portion of the excavator 1 is separated from the rear portion at the divided portion of the skin plate 2, and the earth removal device 6 is placed in the center. The parts are separated from each other and collected from the reaching shaft T. The jack 8 is collected while being attached to the main pipe 2a or the secondary pipe 2b.

  Next, as shown in FIG. 4 (b), the follower pipe 2b is further propelled until it is exposed to the reach shaft T, and the follower pipe 2b is separated from the succeeding push pipe 11, and the reach shaft is separated together with the rear portion of the soil removal device 6 separated. Collect from T. Thus, when the reaching shaft T can be formed widely, the excavator 1 is recovered only by separation.

  When leaving the underground shaft in a small shaft or existing structure that cannot be passed even by the excavating machine 1 from which the reaching shaft T is separated, construct a pipeline while drilling the natural ground G with the excavating machine 1 in the same manner as described above, and excavate. Proceed until only the tip of the machine 1 is exposed to the reaching shaft T. As shown in FIG. 5 (a), the cutter 3, the drive unit 4, the partition wall 5, and the earth removal device 6 are disassembled and recovered from the reaching shaft T. To do. At the same time, the reinforcing block 9, the jack 8 and the support member 7 are removed from the inner surface of the main pipe 2a or the follower pipe 2b and recovered from the reaching shaft T or the starting shaft (not shown).

  Next, as shown in FIG. 5 (b), a finishing block 10 of the same quality as the propulsion pipe 11 is attached to the entire inner surfaces of the main pipe 2a and the sub pipe 2b so as to be flush with the inner face of the propulsion pipe 11. The sub pipe 2b is left in the ground to be a part of the main pipe. As shown in FIG. 6, the finishing block 10 is fixed by screwing bolts 13 to the cylindrical portion 12 provided on the inner surface of the skin plate 2. After that, the gap between each part is jointed with a filler to complete the construction.

  The technology of the present invention is useful for a construction in which the reaching shaft is a small shaft, or a construction whose plan is easily changed from the recovery of the excavator to the underground.

It is explanatory drawing of the excavation machine of an Example. It is a front view of the excavation machine of an Example. It is AA sectional drawing of FIG. It is explanatory drawing which shows collection | recovery of the excavation machine of an Example. It is explanatory drawing which shows collection | recovery of the excavation machine of an Example. It is explanatory drawing which shows fixation of the finishing block of an Example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Excavator 2 Skin plate 2a Main pipe 2b Subordinate pipe 3 Cutter 4 Drive part 5 Bulkhead 6 Earth removal device 7 Support member 8 Jack 9 Reinforcement block 10 Finishing block 11 Propulsion pipe 12 Tube part 13 Bolt G Ground mountain T Reaching shaft

Claims (4)

  A cutter is placed at the tip of the skin plate via a partition, a drive unit and a soil removal device that rotate the cutter are installed inside the skin plate, and the skin plate is divided into front and rear and connected with a jack that corrects the direction of excavation. In the excavator that allows the construction of a pipeline in the ground by drilling a natural ground while propelling the propulsion pipe, the cutter, the drive unit, the bulkhead, and the soil removal device can be disassembled. A digging machine characterized in that a reinforcing block having a predetermined thickness is attached to each inner surface of the skin plate in a detachable manner, and a jack is detachably attached at the position of the reinforcing block adjacent to the front and rear skin plates.   The excavation machine according to claim 1, wherein the inner surface of the skin plate is divided into a plurality of sections in the front-rear direction, and reinforcing blocks are attached to the front and rear sections so as to be adjacent to each other.   Drilling a natural ground with the excavator according to claim 1 or 2 and propelling until the front skin plate of the excavator is exposed to the vertical shaft, separating the front skin plate of the excavator from the rear skin plate. Then, the front part is recovered from the reaching shaft, further propelled until the skin plate at the rear of the excavator is exposed to the reaching shaft, and the skin plate at the rear of the excavator is separated from the subsequent propelling pipe and recovered from the reaching shaft. The method of collecting the excavator.   Drilling a natural ground using the excavator according to claim 1 or 2 and propelling the excavator until the tip of the excavator is exposed to the reaching vertical shaft, removing the cutter, the drive unit and the earth removing device from the skin plate and disassembling. Then, the jack and reinforcement block are removed from the skin plate and recovered to the side of the arrival shaft or start shaft, and the skin plate is left in the ground. A method of constructing pipes with a hole wall.

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