JPS59106698A - Method and apparatus for advancing cylinder - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method and apparatus for advancing a wide completed cylinder into shallow ground.

When advancing a wide cylindrical body into shallow ground, use the pipe roof construction method to lay small diameter pipes underground in advance on the top surface of the cylindrical body or on the outside of the top and side surfaces to prevent the face when the cylindrical body is excavated. A construction method is used in which a large cylindrical body is advanced into the ground after being protected by this small diameter pipe. However, although this bi-blue roof is a temporary construction, it requires the installation of small-diameter pipes along its entire length, and the pipe roof makes up a large proportion of the total construction cost, and the construction period will still be long. Furthermore, the pipes have to be buried, which is wasteful. Moreover, there is earth and sand between the pipe and the upper part of the cylinder, and as the cylinder moves forward, this earth and sand moves, causing the upper ground surface to sink or heap up, and the pipe to move laterally, causing the ground surface in the -F section. There are drawbacks such as horizontal movement of money.

Furthermore, there is a method in which small-diameter pipes or sheet piles are arranged on the upper surface of a large cylindrical body to obtain a friction cut when the cylindrical body moves forward, but the present invention is not intended to obtain such a friction cut.

The present invention provides an economically superior and safe method and apparatus proposed to overcome the drawbacks of the above-mentioned pipe roof construction method. That is, the present invention does not involve laying pipes in advance on the outside of the cylinder to be advanced into the ground over the entire construction length as in the pipe roof construction method, and then advancing the large cylinder into the ground. Inside the cutting edge 11i11 provided at the front end of the body, a plurality of small cylindrical bodies with the required length in the range of 3 to 8 m, which is sufficient to protect the face during excavation, are attached to the cutting edge etc. using the supporting part. The group of small cylinders is supported and arranged by the members of
! This method is characterized by advancing a large completed cylindrical body into the ground with shallow earth cover by repeatedly advancing and advancing it.

Embodiments of the present invention will be described in detail below with reference to the drawings.

As shown in Figure 1, the completed large cylindrical body (1
), a group of small cylinders (2) about several meters long are placed in front of the top plate of the large cylinder (1) to protect the face when the large cylinder moves forward. As shown in Figure 2, the propulsion jack equipment (8) is fully installed between the top plate of the large cylinder (1) and the small cylinder (2), and the small cylinder is used as the total reaction force of the large cylinder (1). After excavating into the ground in front of the face of all large cylindrical bodies (1) in group (2), the reaction wall (7), traction jack equipment (4), and traction member (5 )
The large cylindrical body (1) is advanced one digging length into the entire ground by a towing equipment consisting of a fixing device (6), etc., and the following small cylindrical body (
2) The completed large cylindrical body (1) is advanced completely into the ground by repeating the grouping and digging of the large cylindrical body (1) alternately. In addition, the small cylinder body (2) for preventing fanning of the face of the large cylinder body (1) may be arranged in a gate shape as shown in FIG.

Moreover, FIG. 5 is a side view showing another embodiment, in which a small cylindrical body (2
) is equipped with the same reaction wall (7), traction jack equipment (4), and traction member (
5), it may be moved forward by being towed by a towing facility constituted by a fixing device (6) or the like.

On the other hand, the large cylindrical body (11) may be advanced by a conventional underground advancement method for a cylindrical body, such as a propulsion method or a self-propelled advancement method, although it is not shown in the drawings in addition to the above-mentioned method.

The rear part of the small cylindrical body is shown in the embodiments shown in Figs. 1 to 5 without support.
The illustrated embodiment shows a case where the cutting edge (3) is supported by a supporting member (9).

Since the tip of the small cylindrical body is always buried in the ground, when the load on the small cylindrical body from the top is small, it is necessary to provide sufficient support to prevent the rear part of the small cylindrical body from falling, using the cantilever theory. However, if the load from the top increases, there is a risk that the rear of the small cylinder will fall, so support is required to prevent this.

As is clear from the above explanation, the present invention protects the face during excavation of the large cylinder by placing a group of small cylinders disposed inside the large cylinder into the ground in front of the face when the large cylinder excavates. However, the completed large cylinder with a wide width is used to excavate shallowly into the ground, and the large cylinder and a group of small cylinders are advanced alternately, shortening the construction period. Since it is installed inside the mouth, a small number of pieces are required, and the length of the small cylinder does not require extension of the entire construction, and it is economical because it can be reused. The face of the large cylinder can be safely excavated because the face of the large cylinder can be safely excavated, and when the large cylinder moves forward, the small cylinder is underground in front of the large cylinder, so The body moves laterally,
It does not sink and is safe because the area behind the large cylinder's cutting edge receives the upper load and is protected by the cutting edge and the finished cylinder, and the area in front of the cutting edge is protected by a small cylinder that protects the upper load and face. It is reliable, shortens the construction period, and is technically and economically superior.

The method and apparatus of the present invention have been described above with reference to embodiments and drawings, but of course the present invention is not limited to these embodiments, and various modifications of the design can be made without departing from the gist of the present invention. It is possible to do this.

[Brief explanation of drawings]

1 and 4 are front views showing different embodiments of the method and apparatus of the present invention, FIGS. 2 and 3 are side views showing the order of the method of the present invention, and FIG. FIG. 6 is a side view showing another embodiment of the method and apparatus of the invention, and FIG. 6 is a side view showing the relationship between the rear part of the small cylindrical body and the cutting edge of still another embodiment. 1......Large barrel 2...Small barrel 3...Blade mouth 4...
・・・・・・・・・ Towing jack equipment 5 ・・・・・・
..... Traction equipment 6 ..... Fixture tool 7 ..... Reaction force equipment 8 ..... Propulsion jack equipment 9.・・・
・・・・・・Applicants for patents for supporting members and above: Umi Tankura and 1 other person)...', Ij
11th Sword Pickle Lambda Thirty 31 Sword

Claims (4)

[Claims] (1) When a large cylinder is advanced into the ground using conventional construction methods, a plurality of small cylinders are arranged in parallel inside the blade [1] to protect the face when the large cylinder is excavated. The small cylinder is moved forward by towing or propulsion equipment, and after the required excavation length has been advanced underground from the face of the large cylinder, the entire ground protected by the group of small cylinders is excavated. , and then moving the large cylinder forward by a required excavation length. (2) The method for advancing a cylinder according to claim (1), wherein the rear part of the small cylinder is supported by another object using a support member. (3) A cutting edge provided in front of the large cylindrical body, multiple small cylindrical bodies arranged in parallel inside the cutting edge to protect the face when the large cylindrical body is excavated, and the small cylindrical bodies towed or propelled forward. A cylindrical body advancing device comprising: an advancing facility and an advancing facility for advancing a large cylindrical body. (4) The small cylindrical body described in claim (3) is disposed while being supported by another object using a support member. Cylinder advancement device.