JP2578184B2 - Ring drilling rig - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an annular excavator for replacing an existing pipe such as an old pipe buried underground with a new pipe.

(Conventional technology) Existing pipes (drain pipes) buried underground constructed by open-cutting method or shield method, etc. need to be re-laid due to deterioration of strength due to aging and insufficient water supply capacity. Replacement of a new pipe with a new pipe is conventionally done by stopping the function of the existing pipe (sewer) and removing the existing pipe by open cut method, etc.
This is a stepwise process of laying new pipes, and the number of manual operations is increasing.

(Problems to be Solved by the Invention) The conventional replacement of existing pipes and new pipes involves stepwise replacement of the existing pipes, removal of existing pipes, and subsequent installation of new pipes. However, there is a problem that a lot of trouble is required, a construction period is lengthened, and construction costs are significantly increased.

In addition, when the laying is carried out by the open-cutting method, it is necessary to secure land on the ground, traffic regulations in the road section, and other secondary problems are extremely many, which significantly impedes the construction, and is carried out in tunnel construction. In such a case, it is necessary to solidify the ground around the existing pipes by injecting chemicals and improve the ground to secure the stability (self-supporting) of the ground after the crushing of the existing pipes. There is a problem that it takes a lot of time and effort to discharge and lay new pipes, which is a difficult task and significantly increases the construction cost.

The present invention has been developed in order to address the above-described problems, and the object thereof is to continuously excavate the ground around the existing pipe and continuously cut and remove the existing pipe by mechanical force. It is an object of the present invention to provide an annular drilling rig in which the performance of the replacement of existing pipes and new pipes is improved, and the efficiency is improved by making it possible to seal and protect the ground on the peripheral wall and to lay new pipes in parallel.

(Means for Solving the Problems) The present invention relates to a tunnel excavator equipped with a skin plate, a plurality of propulsion jacks, a discharge device, and the like provided on an apparatus main body. A driven cylindrical cutter head is protruded,
The cutter head is characterized by a structure in which an outer cutter of an existing pipe and a cutting cutter of the existing pipe are disposed on all of the cutter heads. The thrust of the entire apparatus provided by a plurality of propulsion jacks and the apparatus protrudes toward the front of the apparatus body and rotate. The outer cutter of the cutter head and the cutting cutter enable continuous excavation of the existing ground around the existing pipe and continuous cutting and removal of the existing pipe. Is possible.

(Operation) A plurality of propulsion jacks come into contact with the front end of the laid new pipe, a thrust is given to the entire device by a reaction force due to the extension of the propulsion jack, and the thrust is protruded from the front side of the device main body. The outer ground of the existing pipe is continuously excavated by the outer cutter and the cutting cutter of the rotationally driven cutter head, the existing pipe is continuously cut and removed, and the ground peripheral wall and the seal are stabilized by the cutter head and the skin plate, New pipes will be laid smoothly alongside.

(Embodiment) FIGS. 1 and 2 show a first embodiment of the present invention. In the drawings, (1) is mounted on the outer periphery of the apparatus main body (1), and (2) is mounted on the outer periphery of the apparatus main body (1) so as to protrude rearward. Cylindrical skin plate,
(3) a plurality of propulsion jacks protruding from a rear peripheral portion of the device body (1), and (4) a screw conveyor for receiving excavated earth and sand from a lower front portion of the device body (1) and discharging the excavated soil backward. And a plurality of propulsion jacks (3) and a discharge device (4) provided on the device main body (1). A cylindrical cutter head (5), which is rotationally driven by a rotary driving device (10, 11, 12), protrudes from the front side of 1), and an outer cutter (20) of the existing pipe (20) is provided in front of the cutter head (5). 6a, 6b) and the existing pipe cutting cutter (6c).

The cutter head (5) is rotatably protruded from a front side of the apparatus main body (1) by a seal / bearing mechanism (7) or the like.
The cutter rotation motor (1
0), a rotary drive device (10,
11,12).

A plurality of outer cutters (6a) which are arranged at intervals in the circumferential direction on the front end face of the cutter head (5) and excavate along the outer circumference of the existing pipe (20); A plurality of spiral outer cutters (6b) that are arranged at intervals and excavate the ground outside the existing pipe (20), and existing pipes (20) that are arranged at circumferential intervals on the inner surface side of the cutter head (5) Multiple cutting cutters (6
c) is disposed, and by rotating the cutter head (5), each outer cutter (6a) excavates along the outer circumference of the existing pipe (20) in advance, and the outer pipe (6b) is excavated by each outer cutter (6b). The ground around 20) is excavated, and the end of the existing pipe (20) is cut by each cutting cutter (6c).

The first embodiment of the present invention has the above-described structure, and the operation thereof will be described in detail. To be more specific, the protruding jacks (3) protruding from the rear peripheral portion of the device body (1) are provided at the rod ends. Each mounted contact member (3a) is brought into contact with the front end of the newly laid new pipe (30) (segment assembly, etc.), and the reaction force due to the extension of each propulsion jack (3) is applied to the entire device. A thrust is applied, and the cutter head (5) is rotationally driven by a cutter rotating motor (10) via a transmission mechanism such as gears (11) and (12), so that each of the outer cutters (6a) in front of the cutter head (5). ) Excavates along the outer circumference of the existing pipe (20), and then the outer ground of the existing pipe (20) is excavated by each of the spiral outer cutters (6b), and is also installed by the respective cutting cutters (6c). The end of the pipe (20) is cut, excavated sediment and existing pipe (20) The cutting chips are continuously discharged backward by the discharge device (4), and the cutting of the existing pipe (20) is simultaneously performed simultaneously with the excavation of the ground around the existing pipe (20). Drilling and removal of existing pipes are continuously and simultaneously performed.

In addition, along with excavation of the ground around the existing pipe (20), the outer excavation surface is sealed and stabilized by the cutter head (5) and the skin plate (2), and a new pipe (30) is laid in parallel behind the equipment. Will be When the propulsion jack (3) is excavated for one stroke, each propulsion jack (3) is sequentially shortened, and a new pipe (30) is laid. This is performed by mechanical force by repeating the above steps. The continuous cutting and removal of the existing pipe (20) and the laying of a new pipe (30) will be performed in parallel.

Water and sewage in the existing pipe (20) are discharged to the rear of the apparatus by appropriate means.

FIG. 3 shows a second embodiment of the present invention. Compared to the first embodiment, the outer cutter (16a) is provided at the tip end of the cutter head (5) at two circumferentially spaced inner and outer stages. The outer cutter (16a) is characterized in that
It has the effect equivalent to the outer cutters (6a) and (6b) of the embodiment.

(Effects of the Invention) The present invention is configured as described above, and a thrust is applied to the entire apparatus by a plurality of propulsion jacks, and the outer cutter and the cutting cutter of the cutter head projecting to the front side of the apparatus main body and rotated by the rotary driving device. As a result, the surrounding ground of the existing pipe is continuously excavated, the existing pipe is continuously cut and removed, and the surrounding wall of the ground is stabilized by the cutter head and skin plate, and the new pipe is laid in parallel, and the existing pipe and the new pipe are laid. Replacement performance and efficiency have been greatly improved.

Although the present invention has been described with reference to the embodiments, the present invention is, of course, not limited to such embodiments, and various design modifications can be made without departing from the spirit of the present invention. .

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a first embodiment of the present invention, FIG. 2 is a sectional view taken along the line II-II of FIG. 1, and FIG. is there. DESCRIPTION OF SYMBOLS 1 ... Device main body, 2 ... Skin plate 3 ... Propulsion jack, 4 ... Discharge device 5 ... Cutter head, 6a, b-16a ... Outer cutter 6c ... Cutting cutter

Claims (1)

(57) [Claims] 1. A tunnel excavator having a skin plate, a plurality of propulsion jacks, and a discharge device disposed on an apparatus main body, wherein a cylindrical cutter head rotationally driven by a rotary driving device is provided at a front side of the apparatus main body. Protruding,
An annular drilling machine, wherein an outer cutter of an existing pipe and a cutting cutter of the existing pipe are disposed at a front portion of the cutter head.