JP2940813B2 - Mobile excavation method and equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile digging device for underground laying work in an urban area.

[0002]

2. Description of the Related Art Japanese Unexamined Patent Publication No. 63-2197 discloses such a technique.
No. 96 and JP-A-3-59219 disclose excavation of a pipe laying start point, installation of a digging propulsion machine, excavation of the entire surface of the propulsion machine, and use of a soil wall behind the propulsion machine as a reaction wall with a jack or the like. A technique is shown in which a propulsion device is moved forward, a sheet pile is applied to earth walls on both rear sides which are released by the advancement of the propulsion device, a pipe is buried, a backfill sheet sheet is pulled out, and a pipe is moved forward in a tapeworm type to lay a pipe. .

[0003]

In the above-mentioned prior art, a frame structure is provided to oppose the earth pressure received by the slide plate of the propulsion device, and a driving device for moving the slide plate forward and moving the frame structure is required. They cause traffic obstacles, and it is difficult to construct on narrow roads and on curved roads.

[0004] It is an object of the present invention to provide a mobile excavation shoring device which can be constructed even on narrow roads, and can be constructed even on curved roads, without traffic obstacles.

[0005]

According to the present invention, in a mobile digging work for underground laying work in an urban area, a pipe laying starting point is cut and cut according to the size of a propulsion device having an upper opening. The propulsion unit is installed, the front surface of the main unit is dug, the reaction force is applied to the rear earth wall by the propulsion jack installed at the back of the main unit, and the propulsion jack is propelled. The board is sequentially moved, the propulsion jack is applied to the board, and the board is propelled, and a lightweight steel sheet pile is erected at the rear of the propulsion unit body generated by the propulsion.

Further, according to the present invention, the lightweight steel sheet pile is inserted into the light steel sheet pile receiving hole at the rear portion of the main body which has been released prior to the advance of the thruster main body, and the main body is propelled according to the process of one day. After that, it is characterized by burying an underground laid object and supporting it with the wife at the rear of the main body, applying a lightweight steel sheet pile and back-pulling the lightweight steel sheet pile.

Further, according to the present invention, the front face of the main body is dug in a predetermined bending direction, and the jack for changing the direction is pivoted at the face portion opposite to the bending direction.

According to the present invention, there is provided a mobile digging device for use in underground burial work, which has a pair of slide plates whose side surfaces are in sliding contact with the earth wall and whose front portions are face portions, respectively. It is assembled according to the construction scale by connecting with a stabilizer plate slidingly contacting the bottom earth wall and extending a hydraulic type retaining support beam on the upper part, and inside the slide plate is a belly guide wall and a jack receiving plate for propulsion The guide wall is equipped with an upright that serves as a soil retaining support for the side wall while transmitting the propulsion force to the rear retaining reaction wall at the time of excavation propulsion. A mounting hole is provided, a propulsion jack is provided between the jack abutment mounted in the hole and the jack receiving plate, and a reaction force is applied to the jack abutment by extension of the propulsion jack. Id Plates were one stroke advancing jack, then drilled one stroke at a time inchworm manner of propelling jacks to advance the attachment position of the jack contact plate.

Further, according to the present invention, the slide plate is constituted by a plurality of plates which can be freely connected.

Further, according to the present invention, in claim 3 or 4, the front face portion of the slide plate is pivotally attached to the slide plate body by a pivotally attachable portion which can freely protrude.

[0011]

According to the present invention, the earth wall behind the propulsion device is used as a reaction wall, and the jack abutment plate 19a is latched upright, the corresponding plate is jacked and extended, and the propulsion device is advanced by one pitch. The retracted position of the jack abutment plate 19a is set to 1
The above operation is repeated by advancing the pitch and the number of pitches in the process of one day is advanced, a pipe is laid and backfilled, and the back sheet pile is pulled out. Traffic obstruction can be minimized.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1 to FIG. 3, a propulsion unit main body generally designated by the reference numeral 1 is composed of a pair of slide plates connected in three layers in the illustrated embodiment. The middle part 5 and the upper part 8 of the propulsion unit are constituted, and each of them is selectively connected by four (two on one side) brackets 11 (constituted with a drawer type and inserted and fixed with pins) 11. Further, both sides of the propulsion device are connected by a hydraulic soil retaining beam 12 and a stabilizing plate 7, and have a structure that can expand and contract according to the construction space.

In a place where the construction space is narrow, the components 2, 5, and 8 of the propulsion unit are individually installed. However, in a place where the construction space is wide and a crane or the like can be used, these parts are assembled and installed in advance.

At the inner front part and the rear part of the upper part 8, 8 of the propulsion unit, a hydraulic type retaining beam support plate 6 and a propulsion jack support plate 19 are protrudingly provided, respectively.
Hydraulic earth retaining beams 12 are stretched between 9, 19, respectively. A cutting blade 3 is pivotally connected to a front end of each of the propulsion unit lower part 2, the middle part 5 and the lower part 8 by a hinge part 4, and the hinge part 4
, So that it can be pulled out in the forward direction. Also,
In the propulsion unit middle part 5, jack contact plates 13 and 14 for direction change are provided.
As shown in FIG. 12, a 15-ton jack 1 is provided between the contact plates 13 and 14 when the direction is changed.
6, and a tie rod 15 is stretched between the jack abutment plates 13, 13.

On the other hand, a propulsion jack stand 17 is protrudingly provided on the rear inner side of the propulsion unit upper part 8, and a propulsion jack 18 is fixed on the jack stand 17, and the jack stand 17 and the propulsion jack are provided. A belly-raising guide wall 20 is provided below the receiving plate 19. The bulging guide wall 20 transmits the propulsive force to the rear reaction wall along with the propulsion, and sequentially inserts the bulging 20A (FIG. 5) from the front, which has both the role of a rear retaining steel material and the role of the rear retaining member. ,
It plays the role of inducing the connection to the rear existing abdomen. The prow 20A is provided with a hole 20b in which the propulsion jack abutment plate 19a can be mounted in accordance with one stroke (for example, 30 cm) of the propulsion jack 18.

Next, the mode of construction will be described.

First, the pavement at the starting point of the pipeline is cut with an excavation width W (for example, 1.3 m) and a length L (for example, 3 m) in the propulsion direction.
Demolition is performed, and a depth H (for example, 1.2 m..., Which is the depth of the propulsion units 2, 5, 8 and the lining plate 24) is excavated from the road surface. The excavation width W is determined by the size of the laid structure and the width of the road. The pre-assembled propulsion unit is installed here, and a plurality of lightweight steel sheet piles 2 are mounted on the rear face of the rear recess A2.
2 and the earth retaining wall 20A, the earth retaining wall B is installed with the belly 20A, and the hydraulic earth retaining beam 12 is stretched between the jack receiving plates 19, 19 and between the supporting beam receiving plates 6, 6, respectively. Further, the propulsion jack 18 is installed on the propulsion jack base 17 of the propulsion unit upper part 8, and the propulsion jack abutment plate 19a is installed in the hole 20b of the protuberance 20A provided on the protuberance guide wall 20, and covered according to the road surface. Propelling machine 1
Install on top of In places where crane facilities are not possible, the parts 2, 5, and 8 of the propulsion device are assembled manually in the mine in order (FIGS. 4 and 5).

After the installation of the propulsion device, the front surface of the propulsion device 1 is dug first by using an excavator (not shown) to cut the oblique line portion C1 having a length L1 (for example, 30 cm) (FIG. 6). The propulsion device 1 is propelled by applying a reaction force to the rear retaining wall via 19a (FIG. 7). At this time, it is preferable to provide a conveying means such as a belt conveyor or a screw conveyor (not shown) from the excavation face to the rear in order to excavate and discard the earth and sand backward.

A lightweight steel sheet pile 22 is erected below the light steel sheet pile receiving hole formed at the rear of the propulsion machine body by the propulsion of the propulsion machine body (FIG. 8). When the construction length for one day has been promoted, a pipe is laid in a predetermined position, earth retaining is applied to the rear wife part of the propulsion device main body, and the lightweight steel sheet pile is pulled out (FIG. 10). This process is repeated, and when the front surface of the propulsion device 1 advances to the end point of the pipeline, the main body of the propulsion device is removed and rebuilt.

Next, the construction of a curved line will be described.

FIG. 11 shows a preceding excavation step, in which a propulsion unit front portion E indicated by a hatched portion of the propulsion unit 1 is excavated in a predetermined bending direction. When one side is propelled in advance, the directional change jack plates 13, 13 are connected by a tie rod 15 by utilizing an arc drawn about the opposite side. The face propulsion jack 16 is interposed between the contact plates 13 and 14 of the propulsion machine on the opposite side to the bending direction, the guide G of the hinge 4 of the face is extended to adjust the face to a predetermined angle, and then propulsion. Promote the machine body.

In this way, a curved road can be similarly constructed.

When the excavation depth becomes large, it is possible to assemble each part having the same shape as each of the parts 2, 5, 8 on the upper part of the propulsion device 1 according to the depth.

[0024]

As described above, according to the present invention, since the construction method is based on propulsion, the construction can be carried out without vibration and noise, and the width of the propulsion device can be freely changed. Can be constructed. Further, even if the excavation depth changes within one line, it can be dealt with by increasing or decreasing the side plate. Digging the front of the main body in the predetermined bending direction,
Curved roads can be constructed by bending and propelling the face.

At the intersection, the road surface is made of a steel lining plate in advance, and the road can be constructed without any obstacles by propelling underneath.

Since the main body of the propulsion unit is divided and assembled manually, there is no need for an installation yard such as a crane. And no starting shaft is required.

After the work of one day, the upper part of the propulsion unit is lined to release the roadway.

[Brief description of the drawings]

FIG. 1 is a top view showing a propulsion device embodying the present invention.

FIG. 2 is a side view of FIG. 1;

FIG. 3 is a rear view of FIG. 2;

FIG. 4 is a top view for explaining a propulsion device, an earth retaining device, and a lining plate installing process.

FIG. 5 is a side view of FIG. 4;

FIG. 6 is a top view illustrating a propulsion machine front excavation step.

FIG. 7 is a plan view illustrating a propulsion device propulsion process.

FIG. 8 is a side view of FIG. 7, illustrating a step of installing a lightweight rear steel sheet pile at the rear of the propulsion.

FIG. 9 is a side view illustrating a backfilling step.

FIG. 10 is a side view illustrating a lightweight steel sheet pile drawing step.

FIG. 11 is a top view for explaining a preceding digging process on a curve line.

FIG. 12 is a top view for explaining a propulsion machine front direction change excavation step.

FIG. 13 is a detailed view of a portion H in FIG. 11;

FIG. 14 is a detailed section of an I part in FIG. 12;

[Explanation of symbols]

 A: recess B: earth retaining C: excavated part D: propulsion equipment E: forward excavated part on a curved line F: lightweight steel sheet pile receiving hole G: guide DESCRIPTION OF SYMBOLS 1 ... Propulsion machine 2 ... Propulsion machine lower part 3 ... Cutting edge part 4 ... Hinge part 5 ... Propulsion machine middle part 6 ... Hydraulic type earth retaining support plate 7 ... Stable plate Reference numeral 8: Upper part of the propulsion unit 11: Bracket 12: Hydraulic earth retaining beam 13, 14: Jack abutment plate for direction change 15: Tie rod 16: Jack 17: Jack for propulsion Table 18: Jack for propulsion 19: Jack receiving plate for propulsion 19a: Jack abutment plate for propulsion 20: Guide wall for belly raising 20A: Bare raising 20a: Earth retaining support 22 ..Light steel sheet piles 24 ... lining boards 25 ... pipes 26 ... bidets Scaffold 27 ... chain block

Continuation of the front page (72) Inventor Kiyomi Ando 1-2 Kasanouchi Kita, Sakura-shi, Fukushima-shi, Fukushima Tohoku Electric Power Co., Inc. Fukushima Technical Center (72) Inventor Masashi Otsuka 8-14-14 Ginza, Chuo-ku, Tokyo No. Nittoku Construction Co., Ltd. (72) Inventor Shinobu Horiuchi 8-14-14 Ginza, Chuo-ku, Tokyo Nittoku Construction Co., Ltd. (56) References JP-A-53-113138 (JP, A) JP-A Sho JP-A-3-59219 (JP, A) JP-A-63-219796 (JP, A) JP-A-63-165700 (JP, A) JP-A-62-103895 (JP, A) U) (58) Field surveyed (Int. Cl. ⁶ , DB name) E21D 9/06 331 E02D 17/08

Claims (5)

(57) [Claims] In a mobile excavation method used for underground laying work, a pipe laying starting point is cut and cut according to the size of a propulsion device having an upper opening, and a propulsion device is installed. The propulsion jacks installed at the rear propellers take the reaction force to the rear mud wall to propel the propulsion. A lightweight steel sheet pile is erected at the rear of the main body of the propulsion unit, and the main body is propelled in accordance with the process of the day. Then, an underground laying is buried and supported by the wife at the rear of the main body. A mobile digging method, in which a lightweight steel sheet pile is applied and backfilled to pull out the lightweight steel sheet pile. 2. The method according to claim 1, wherein the front surface of the main body is dug in a predetermined bending direction, and the face portion opposite to the bending direction is pivoted forward. 3. A mobile digging device for use in underground burial work, comprising a pair of slide plates having side surfaces slidably in contact with an earth wall and front portions each serving as a face portion, and a lower portion of both plates being in sliding contact with a bottom earth wall. Assembled according to the construction scale by connecting with a contacting stabilizing plate and stretching a hydraulic type retaining support beam on the upper part, a belly uplift guide wall and a jack receiving plate for propulsion are protruded inside the slide plate, The guide wall is provided with an upright that serves to transmit the propulsion force to the rear retaining reaction wall at the rear during excavation and serves as a retaining support for the side wall, and the upright is provided with a mounting hole for a jack jack plate for propulsion. A jack for propulsion is provided between the jack abutment mounted in the hole and the jack receiving plate, and a reaction force is applied to the jack abutment by extension of the propulsion jack to jack the slide plate. Key for one stroke, and then the mounting position of the jack plate
A propulsion machine that excavates like a scale by stroke. 4. The propulsion device according to claim 3, wherein the slide plate comprises a plurality of plates that can be freely connected. 5. The propulsion device according to claim 3, wherein the front face of the slide plate is pivotally attached to the slide plate main body by a pivotally attachable portion.