JPH0327118Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Field of the invention This invention relates to a tightening device for earth retention sheet piles of earth retention shoring excavated by a tunnel excavator using sheet piles, especially Metsucel sheet piles.

(b) Background of the invention A Metsucel-type tunnel excavation machine arranges multiple Metsucel sheet piles around a tunnel-shaped frame.
Each sheet pile is pressed into the ground using a jack with other sheet piles as pressure sheet piles, and by repeating this process one after another, the tunnel is excavated by appropriate means while preventing the ground wall from collapsing all around the tunnel. The rear end of each Metsu cell sheet pile of this Metsu cell type excavator is used as a work space for assembling the shoring material 21 and sheet pile 22 that support the tunnel behind the excavator, for example, as shown in FIGS. 3 and 4. It has a tail portion 23 forming a .

This shoring material 21 is assembled with steel H-beams at regular intervals in the cross-sectional direction of the tunnel, and the longitudinal direction of the shoring material 21 is constructed by several stages of upper and lower steel joints 24 arranged inside the ground-side flange of the shoring material 21. connected.
The sheet piles 22 are arranged vertically in the longitudinal direction further outside the splicing material 24 arranged in the horizontal direction, and as the excavation progresses, the end surface of the Metsucel sheet pile tail section 23 is supported by the supporting material 21 assembled within the tail section 23. When the sheet pile 22 is moved by the width of the sheet pile 22, a space is created between the ground 25 and the sheet pile 22 by at least the length of the tail portion of the Metsusel sheet pile.

For this reason, conventionally, each time the tail end surface passes a wooden camber 26 as shown between the sheet pile 22 and the splicing material 24, the sheet pile 22 is immediately driven into the ground.

However, when such tunnels are located under operating track lines or under roads, the ground 25 becomes loose due to the vibrations of trains and traffic vehicles, and the sheet piles 2
A cavity may be formed on the ground side of 2, which may cause subsidence of the track or the road surface, and it is necessary to drive the camber 26 again and press the sheet pile 22 against the ground 25 during tunnel construction.

However, in the conventional method in which a wooden camber 26 is driven between the steel joint material 24 and the sheet pile 22,
The camber 26 may become wedged in the steel joint material 24, so when re-driving the camber 26,
If the camber 26 is damaged or the distance between the joint material 24 and the sheet pile 22 becomes large, the camber 26 may not be able to cope with the problem.

(C) Purpose of the invention This invention enables the desired pressing force to be maintained between the splicing material and the sheet pile even if the distance between the ground and the sheet pile becomes large, and makes it possible to always press the sheet pile toward the ground. The purpose is to provide a fastening device for earth retaining sheet piles that can be used.

(d) Summary of the invention This invention assembles supporting materials at predetermined intervals in the longitudinal direction of the tunnel, connects each supporting material in the longitudinal direction with joint materials, and attaches steel connecting members between each supporting material. This is a tightening device for retaining sheet piles, in which sheet piles are arranged between the timber and the ground, and the sheet piles can be pressed toward the ground by screwing bolts provided on the connecting members.

(E) Example of the invention An example of the invention will be described below in detail based on the drawings.

The drawings show a tightening device for earth retaining sheet piles, and in FIGS. 1 and 2, reference numeral 1 denotes a supporting member made of H-shaped steel, which is assembled in the cross-sectional shape of a tunnel and along its inner periphery. 2 is a wooden sheet pile located between the outer periphery of the shoring material 1 and the ground 3, with the longitudinal direction arranged in the vertical direction; 4 is a steel joint material arranged horizontally to connect the adjacent shoring materials 1 and 1. They are arranged in multiple stages above and below and welded to the supporting material 1.

Numerals 5 and 5 are bolts that have one end fixed to the outer flange 6 of the shoring material 1 and the other end directed toward the inside of the tunnel.

Reference numeral 7 denotes a connecting member made of L-shaped steel that spans the bolts 5, 5, and has holes 8 formed at appropriate intervals in the middle, and is attached by screwing a nut 9 onto the bolts 5, 5. ing.

A bolt 11 that removably engages a backing plate 10 on the sheet pile 2 side passes through the hole 8, and is tightened through nuts 12 provided on both sides of the connecting member 7.

In addition, the backing plate 10 is attached to each bolt 11 in the drawing.
Although they are arranged separately, they may also be arranged consecutively.

(f) Effects of the device Since this device is configured as described above, even if the distance between the sheet pile 2 and the ground 3 becomes large, the connecting member 7
By tightening the bolts 11, the sheet piles 2 can be pressed against the ground 3 side through the backing plate 10, so that when the ground becomes loose, a quick response can be made and the ground can always be maintained in a stable state.

[Brief explanation of drawings]

The drawings show one embodiment of this invention, in which Fig. 1 is a simplified cross-sectional view of a tightening device for earth retaining sheet piles, Fig. 2 is a longitudinal sectional front view thereof, Fig. 3 is a side view showing a conventional example, and Fig. 4
The figure is a longitudinal sectional front view. 1... Shoring material, 2... Sheet pile, 3... Ground, 4...
...joint material, 7...connecting material, 9...nut, 11...
…bolt.

Claims (1)

[Scope of utility model registration request] Assemble steel supporting materials to the tunnel cross-sectional shape and at predetermined intervals in the longitudinal direction of the tunnel, connect each supporting material in the longitudinal direction with steel joints, and install steel connecting materials between each supporting material. A tightening device for earth retaining sheet piles, characterized in that wooden sheet piles are arranged between the shoring material and the ground, and the sheet piles can be pressed toward the ground side by screwing bolts provided on the connecting members.