JP3254546B2 - How to construct a waterway crossing tunnel - 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 constructing a waterway crossing tunnel.

[0002]

2. Description of the Related Art Conventionally, when constructing a tunnel crossing a channel by a sinking method, a sinking container is manufactured by using an existing dry dock such as a shipyard, towed to the site, and firstly constructed between a shaft and a shaft. In general, the problem is that the number of existing dry docks is small and the towing of the buried pit may take a long distance.
Since the shaft is located near the waterway, the excavation of the ground for the construction of the shaft and the inclined tunnel is inevitably deep, requiring large-scale temporary construction and auxiliary construction methods.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a method of constructing a waterway crossing tunnel which is relatively easy and economical without problems as in the prior art described above.

[0004]

The constitution of the method for constructing a waterway crossing tunnel according to the present invention (hereinafter simply referred to as the method of the present invention) is characterized in that the ground at the site where the inclined road tunnel to be connected to the underwater tunnel is to be constructed is cut open and the submerged tank is constructed. Build a dry dock to produce
After constructing the required number of sunk boxes, a skeleton and a shaft above the inclined tunnel were built between the side walls on the back side of the dry dock, and then the underwater excavation of the dry dock channel side ground was carried out. The lower part of the inclined road tunnel is formed by drawing in the box, and then the underwater tunnel connecting to the inclined road tunnel is constructed by burial.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the method of the present invention, first, the ground at the site where a ramp is to be constructed is cut and ground to construct a dry dog 1 for manufacturing a buried box (see FIG. 1).

The dry dog 1 is generally provided with an opening 2 with a gate on the front side on the water channel side, a concrete floor slab 3 on the bottom, and a steel sheet pile on the side wall. It is preferable to adopt a structure in which the buried box can be easily pulled out several times and easily broken after use.

[0007] The illustrated dry dock 1 is designed so that two immersion boxes 4 can be manufactured at a time by arranging them in front and back, and the manufactured immersion boxes 4 are pulled out and moored near the site.

After a predetermined number of submerged boxes 4 have been manufactured, a ramp tunnel 5 is constructed at the position of the dry dock 1. The ramp tunnel 5 is divided into an upper part and a lower part with a vertical shaft as a boundary. A skeleton 6 and a shaft 7 above the ramp tunnel 5 are constructed between the side walls on the far side (away from the waterway) of the dry dock 1 (see FIG. 2).

Then, the ground on the water channel side of the dry dock 1 is excavated underwater, and the excavated portion (between the side walls of the dry dock 1) is excavated.
The lower part of the inclined tunnel 5 is formed by connecting the submerged box 4 to the frame 6 via the shaft 7 (in the embodiment shown, the lower part of the inclined path tunnel 5 is formed by two submerged boxes 4). are doing).

After forming the inclined road tunnel 5 as described above, the underwater tunnel 8 connected to the inclined road tunnel 5 is constructed by a submerged construction method. .

[0011]

The method of the present invention is as described above. Since a dry dog for producing a buried box is constructed at a site where a ramp is to be constructed, there is no need to tow the buried box for a long distance. Not only that, the amount of excavation of the ground for forming the ramp is small, and the building and the shaft above the ramp are constructed between the side walls on the back side of the dry dock. The skeleton can be easily constructed by simply excavating the ground slightly by using the ground retaining, and the lower part of the ramp is formed by a buried box. Various effects can be expected, such as not requiring deep excavation of the ground, not only reducing the number of temporary materials, but also facilitating construction.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a state where a dry dock according to the method of the present invention is built.

FIG. 2 is a cross-sectional view showing a state where an upper part of a ramp tunnel and a shaft are constructed according to the method of the present invention.

[Explanation of symbols]

1: dry dock, 2: opening, 3: concrete floor slab, 4: buried box, 5: ramp, 6: skeleton, 7: shaft, 8: underwater tunnel.

Claims (1)

(57) [Claims] 1. Drilling the ground at the site where the ramp is to be constructed to connect to the underwater tunnel, constructing a dry dock for producing a submerged box, and producing a required number of submerged boxes. The upper part of the ramp is constructed between the side walls and the shaft, and then the underground excavation of the channel side of the dry dock is carried out. A method of constructing a waterway crossing tunnel, wherein the underwater tunnel connecting to the tunnel is constructed by a submerged construction method.