JP3287394B2 - How to move the box - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for advancing a box which is disposed with its propulsion directions facing each other.

[0002]

2. Description of the Related Art A method of excavating underground structures of a large number of members underground such as railways and roads in a transverse direction is to install a propulsion jack on the starting side, for example. Pushing to the arrival side, attaching a towing jack to the rear of the box, towing the box from the starting side to the arrival side with a towing member such as PC steel wire with the reaction force body installed on the arrival side as an anchor, In the latter method of towing, there is a method of alternately advancing the box while attracting each other from both sides of the excavation site.

[0003]

In any of the methods, when a plurality of boxes are sequentially advanced, only one box is advanced in one step, so that the construction period is long, and the upper part of the crossing point is required. The influence period on roads and railroads on the ground is prolonged, which is not preferable in terms of safety.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned disadvantages of the prior art and to reduce the construction period when a large number of underground structures such as railroads and roads are dug deeply in the underground. It is to provide a way forward.

[0005]

According to the present invention, in order to achieve the above object, a housing is disposed on each of opposite sides of a construction site with a propulsion direction facing each other, and a towing jack is provided on a rear portion of each of the boxes on both sides. And fix the end of the towing member connected to the towing jack attached to the box at the opposing position to the rear of the box at the opposing position via a fixing device, and operate both towing jacks simultaneously to operate the towing member. The gist of the present invention is that the boxes at the opposing positions are mutually attracted to each other as reaction force bodies by squeezing and simultaneously excavated.

According to the present invention, in order to excavate the boxes disposed at the opposing positions in the propulsion direction, the towing jacks attached to the respective members are simultaneously operated and the towing members are tensioned. They are attracted to each other as reaction bodies and are simultaneously advanced. Thereby, the boxes at the opposing positions can be simultaneously advanced in one step.

[0007]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is an explanatory view showing a forward step of a first embodiment of a method for advancing a box according to the present invention. The boxes 1a and 1b each have a blade at a tip on the opposite side of a construction site with the propulsion direction opposed. And both boxes 1a, 1
Center hole type towing jacks 3a, 3
b, and the other end of the towing member 4 made of a PC steel wire or the like connected to the towing jacks 3a, 3b is fixed to the rear portions of the boxes 1a, 1b on the opposite side with the fixing tool 5 (FIG. 2 (a)).
).

To excavate the casings 1a and 1b, the towing jacks 3a and 3b attached to the casings 1a and 1b are simultaneously operated and the towing member 4 is tensioned, so that the casings 1a and 1b at the opposing positions are mutually reacted. As they draw each other and move forward at the same time. Thereby, the box 1 at the opposing position in one process
a and 1b are simultaneously advanced (FIG. 2 (b)).

[0009]

As described above, the method for advancing a box according to the present invention is applicable to a case where a large number of underground structures such as railways and roads are excavated in the transverse direction from the side opposite to the excavation direction. At the same time, the box can be advanced, so the construction period can be shortened. Also, since the box is used as a reaction body, there is no need to separately install reaction walls, etc., and the installation space is not required. The workability is also good.

[Brief description of the drawings]

FIG. 1 is a process chart showing a first embodiment of a method for advancing a box according to the present invention.

[Explanation of symbols]

 1a, 1b, 1c: Box 3, 3a, 3b, 3c: Towing jack 4: Towing member 5: Fixing tool 6b: Propulsion jack

Claims (1)

(57) [Claims] Claims: 1. A box is arranged on the opposite side of a construction site with a propulsion direction facing each other, a towing jack is attached to a rear portion of each of the boxes on both sides, and a towing jack attached to a box at an opposing position. The ends of the connected towing members are fixed to the rear of the box at the opposing position via fixing devices, and both towing jacks are simultaneously operated to tension the towing members, thereby causing the boxes at the opposing positions to react with each other. A method for advancing a box, wherein the boxes are pulled together and excavated simultaneously.