JPH09296465A - Production and transfer equipment for immersed caisson - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate a back-filling work after completion of a construction, by combining a drydock for production of an immersed caisson, in which the ground is excavated shallowly in a space adjacent to an expected location of the construction in an inclined way of an immersed tunnel and which is constructed at the periphery with the excavated soil and a water level-adjusting lock formed by use of an earth-retaining wall for construction of the inclined way. SOLUTION: The ground for a drydock 2 is excavated shallowly in a space adjacent to an expected location of the construction in an inclined way of an immersed tunnel and banks 3 are constructed with the excavated soil at the periphery. A lock 5 for adjusting water level is formed by use of earth- retaining walls 6, 6 for the construction of the inclined way. Gates 7, 8 are installed at an entrance opening to the dry dock 2 and an exit opening to the water zone respectively. Accordingly, since the ground is excavated shallowly for the drydock and the excavated soil is piled to form a bank, the labor for the treatment of the excavated soil is not much and the back-filling work of the drydock can be easily done after completion of the construction works.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to equipment for manufacturing and moving a submerged box (a box for constructing a submerged tunnel).

[0002]

2. Description of the Related Art Conventionally, the production of a submerged box is usually done at an existing dry dock at a shipyard or the like, but it is difficult to secure it because the number of existing dry docks is small. However, the problem was that the distance to which the submerged box was towed to the construction site was often long.

Therefore, it is conceivable to install a dry dock dedicated to the production of the submerged box near the construction site of the submerged tunnel. In this case, if the ground is deeply excavated to form the dry dock, the excavated soil will be treated and after the construction is completed. Backfilling is difficult.

[0004]

SUMMARY OF THE INVENTION The problem to be solved by the present invention, that is, the object of the present invention is to solve the above-mentioned problems when a dry dock dedicated to the production of a buried box is provided near the construction site of the buried tunnel. The purpose is to provide equipment for manufacturing and moving submerged boxes that is rational and greatly contributes to improving the efficiency of the entire construction.

[0005]

In order to solve the above-mentioned problems, in the facility for manufacturing and moving a sunk box according to the present invention, shallow digging is performed on a vacant land adjacent to a planned site of a sloped portion of a sunk tunnel, and A dry dock for making a submerged box formed by surrounding the excavated soil and a water level adjusting lock formed by using a retaining wall for constructing a slope are combined.

The submerged box manufacturing / moving facility of the present invention may also have a submerged box manufacturing member factory, which is formed on a site formed by embankment in a surplus portion of excavated soil in a dry dock.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described with reference to the drawings (FIGS. 1 to 3). In FIG. 1, which is an overall view of a facility for manufacturing and moving a submerged box according to the present invention, 1 is a land and a water area. The boundary line to the left is the land, the left is water, and the center line of the submerged tunnel to be constructed is X.
Indicated by -X.

Reference numeral 2 denotes a dry dock for making a submerged box, which is provided in an empty space adjacent to a planned site for constructing a sloped part of a submerged tunnel. The dry dock 2 excavates the ground relatively shallowly and excavates the excavated soil. It is formed by building a bank 3 around it (see Fig. 2).

Reference numeral 4 is a site formed by embankment adjacent to the dry dock 1, in which a submerged box manufacturing member factory (not shown) is constructed, and the surplus of the excavated soil is included in the embankment. Used.

In the above-mentioned submerged box manufacturing member factory,
For example, when a PCa member (precast concrete member) is used to manufacture a submerged box, this is manufactured.

Numeral 5 is a lock (lock) for adjusting the water level, which is formed by using mountain retaining walls 6 and 6 for constructing the slope portion of the submerged tunnel, which is opened to the entrance and the water area which are opened in the dry dock 2. Gates 7 and 8 are provided at the exits, respectively.

Reference numeral 9 denotes a submerged box manufactured by the dry dock 2, and when the submerged box is moved to the water area, the lock 5 is used.
With the gate 7 at the entrance of the tank open and the gate 8 at the exit closed, water was poured into the dry dock 2 and the submerged box 9 floated.
Move in the direction of arrow C into the lock 5, then close the gate 7 and open the gate 8 to lower the water level in the lock 5 to the same level as the water level, and then pull out the submerged box 9 to the water level. You can do it (see Figure 3).

[0013]

The submerged box manufacturing / moving equipment of the present invention is as described above, and since the dry dock for submerged box manufacturing is provided near the construction site of the submerged tunnel, the towing distance of the submerged box is short. Since the dry dock is formed by excavating the ground shallowly and laying it around with the excavated soil, it does not take time to process the excavated soil, and it is easy to backfill the dry dock after the construction is completed. , It will greatly contribute to the improvement of the efficiency of the whole construction.

Since the level of the bottom of the dry dock is high, a lock for adjusting the water level is required. However, the lock in the submerged box manufacturing / moving equipment of the present invention uses a mountain retaining wall for constructing the slope portion of the submerged tunnel. Since it is formed by utilizing it, its formation is simple and easy, and even if it is provided, there is little influence on the cost.

In addition, when a site is formed by embedding in the surplus of excavated soil in the dry dock and a submerged box manufacturing member factory is constructed on this site, not only can the excavated soil be used effectively locally, but It is really convenient because the box can be manufactured efficiently.

[Brief description of drawings]

FIG. 1 is an overall plan view for explaining an embodiment of the present invention.

FIG. 2 is an enlarged sectional view taken along line AA of FIG.

FIG. 3 is an enlarged sectional view taken along line BB of FIG. 1;

[Explanation of symbols]

1: boundary line, 2: dry dock, 3: embankment, 4: site,
5: Lock, 6: Mountain retaining wall, 7: Gate, 8: Gate,
9: Submerged box.

Claims (2)

[Claims] 1. A dry dock for manufacturing a submerged box, which is formed by shallowly excavating in an empty space adjacent to a planned construction site of a sloped portion of a submerged tunnel, and erected around the excavated soil, and construction of a sloped portion. Submerged box production characterized by combining with a lock for adjusting the water level formed using a mountain retaining wall
Equipment for transportation. 2. The facility for producing and moving a submerged box according to claim 1, further comprising a submerged box production member factory which is formed on a site formed by embankment in an extra portion of excavated soil of a dry dock.