JPH08218405A - Water-tight joint section structure of submerged case - Google Patents

Abstract

PURPOSE: To reduce the deformation amount of a water-tight rubber and improve maintainability of a water-tight joint section by providing a plurality of coil springs along a front end face and a rear end face of a double shell and preventing external force other than force for maintaining water-tightness from acting on the water-tight rubber. CONSTITUTION: When a case is submerged and excessive compression force 7 acts on a double shell 01a due to earthquake, a coil spring 6 supports it. Accordingly, a water-tight rubber 3 which is sandwiched between an overhanging plate 1 for mounting and an overhanging plate 5 for compression to stop water receives water pressure based on water depth at the installation place and is merely deformed slightly. Moreover, since a pleated steel plate 07 supports shearing force of the double shell 01a in the vertical direction and the forward and backward directions, large compression force does not act on the water-tight rubber 3. By the way, if water depth of the water-tight rubber 3 is 25 meters, water pressure which acts on it is about 2.5kgf/cm<2> . Furthermore, when excessive tensile force 8 acts due to earthquake at the time of the construction of the submerged case, the coil spring 6 supports it. Accordingly, the water-tight rubber 3 receives water pressure based on water depth at the installation place and is merely deformed slightly. As for the other circumstances, it is the same as the above.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a watertight joint structure of a submerged box.

[0002]

2. Description of the Related Art For example, as a watertight joint structure between a front submerged box 01 and a rear submerged box 01 in an undersea tunnel as shown in a perspective view of FIG. )
As shown in the partially enlarged horizontal sectional view of FIG. 3C, a gasket beam 02 protruding from the outer peripheral portion of the rear end face of the double shell 01a of the front submerged box 01 and a bolt 03 on the rear end face thereof.
Thick water-tight rubber 04 attached at and the rear submerged box 0
1. A gasket beam 05 protrudingly provided on the outer peripheral portion of the front end face of the double shell 01a of No. 1 and a W mounted circumferentially between the inner plate of the gasket beam 02 and the inner plate of the gasket beam 05.
Type secondary waterproof rubber 06 and double shell 01 of submerged box 01 in front
a) A pleated steel plate 07 for connecting inner plates, which is circumferentially attached between the rear end inner plate and the front end inner plate of the rear embedding box 01, and has a pleated cylindrical cylindrical pleating process in the middle. What is formed is known. In this known example, the pleated steel plate 0
The plate thickness of 7 is 25 mm. In such a structure, the gasket beam 02 and the gasket beam 05 are constantly used to secure the water stop by compressing the watertight rubber 04 shown in FIG. 7C as shown in FIG. .

However, in such a structure, an excessive compressive load acts on the watertight rubber 04 at the time of construction of a submarine tunnel, an earthquake, or even uneven settlement, so that the deformation amount thereof becomes large, and therefore the damage is caused. It is easy to occur.

[0004]

SUMMARY OF THE INVENTION The present invention has been proposed in view of such circumstances, and an excessive compression force more than necessary to maintain the watertightness does not act on the watertight rubber, and as a result, It is an object of the present invention to provide a watertight joint structure for a submerged box, which has a small amount of deformation of the watertight rubber and is less likely to be broken, and therefore has excellent maintainability.

[0005]

To this end, the present invention is provided with a pleating for connecting inner plates, in which the inner surfaces of the ends of the double shells of a pair of front and rear submerged boxes are circumferentially attached and the middle portion is pleated. In a watertight joint structure of a submerged box that is connected to each other by steel plates, a front submerged box side projecting plate that has a gap in the rear and is provided so as to project over the entire outer periphery of the rear end of the double shell of the front submerged box A rear submerged box side overhanging plate which is a front end of the double shell of the submerged box and coaxially and circumferentially projects inside or outside the front submerged box side overhanging plate and has a front gap; A ring-shaped watertight rubber that is press-fitted between the two overhanging plates, the front end is locked to the rear end of the double shell of the front sunk box, and the rear end is locked to the front end of the double shell of the rear sunk box. Along the front end surface and the rear end surface of the Comprising a yl spring force other than a water-tight held by the watertight rubber is characterized in that so as not to act.

[0006]

According to this structure, the front submerged box side projecting plate which is provided over the entire circumference of the rear end of the double shell of the front submerged box and has a rear gap, and the rear submerged box. Between the rear projecting box side projecting plate, which is the front end of the heavy shell and is coaxially and circumferentially projected inside or outside the front projecting box side projecting plate, and has a front gap, and the both projecting plates. The annular watertight rubber that was pressed into the front, the front end was locked to the rear end of the double shell of the front sunk box, and the rear end was locked to the front end of the double shell of the rear sunk box, and the front end face of the double shell, With a plurality of coil springs arranged in parallel along the rear end face at appropriate intervals in the circumferential direction, an external force other than that for maintaining the watertightness is not applied to the watertight rubber, so that the watertightness is maintained. Excessive compression force more than necessary does not act on the watertight rubber, and as a result, the watertight rubber Small amount of deformation, destruction is unlikely to occur.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to the drawings, an embodiment in which the present invention is applied to the double shell 01a of the known submerged box 01 shown in FIG. 2 will be described with reference to the same reference numerals as those in FIG. First, in the horizontal cross-sectional view of FIG. 1 (A), reference numeral 1 denotes a watertight rubber mounting extension plate projecting on the outer peripheral portion of the rear end of the double shell 01a of the front submerged box 01, and 3 denotes an attachment extension plate 1. Watertight rubber fixed to the inner surface by a plurality of bolts 4 is a watertight rubber compression projecting plate projecting from the central portion of the front end of the double shell 01a of the rear submerged box 01, and 6 is a submerged box 01 whose front end is the front. Of the double shell 01a, the rear end of the double shell 01a is locked to the center of the front end of the double shell 01a of the rear submerged box 01, and the circumference of the double shell 01a along the front end surface and the rear end surface of the double shell 01a. It is a plurality of coil springs arranged at appropriate intervals in the direction.

C ₁ is a gap between the rear end of the mounting double plate 1 of the front double shell 01a and the front end of the rear double shell 01a,
C ₂ is the rear end of the front double shell 01a and the rear double shell 01a
As shown in the horizontal sectional view of FIG. 1 (B), the sizes of C ₁ and C ₂ between the front end of the compression overhanging plate 5 and
The dimensions are such that a clearance can be secured even when the compressive force 7 acts on the joint portion.

In such a structure, as shown in FIG. 1 (B), when an excessive compressive force 7 acts on the double shell 01a during the construction of a submerged box, an earthquake, etc., this causes the coil spring 6 to Since it is supported, the watertight rubber 3 which is sandwiched between the mounting overhanging plate 1 and the compression overhanging plate 5 and has a water blocking action is only slightly deformed by the water pressure based on the installed water depth. Also, double shell 0
The shear force of 1a in the up-down direction and the front-back direction is 0
Since each of them supports the watertight rubber 3, a large compressive force does not act on the watertight rubber 3. By the way, when the water depth of the watertight rubber 3 is 25 m, the water pressure acting on it is 2.5 kgf /
It is about cm ² .

Further, as shown in the horizontal sectional view of FIG. 1 (C), when an excessive tensile force 8 is applied during the construction of a submerged box, an earthquake, etc., the coil spring 6 supports this, so that a watertight rubber is provided. No. 3 is slightly deformed due to the water pressure based on the installed water depth, and other circumstances are the same as above.

It should be noted that the compression overhang plate 5 may be coaxially arranged outside the mounting overhang plate 1 and the watertight rubber 3 may be press-fitted between these overhang plates.

According to the structure of this embodiment, the front submersible box-side projecting plate which is provided over the entire outer periphery of the rear end of the double shell of the front submerged box and has a rear gap, and the rear submerged box. A rear submerged box side overhanging plate which is a front end of the double shell of the submerged box and coaxially and circumferentially projects inside or outside the front submerged box side overhanging plate and has a front gap; A ring-shaped watertight rubber that is press-fitted between the two overhanging plates, the front end is locked to the rear end of the double shell of the front sunk box, and the rear end is locked to the front end of the double shell of the rear sunk box. With a plurality of coil springs arranged in parallel along the front end face and the rear end face at appropriate intervals in the circumferential direction, the water-tight rubber is prevented from being acted on by an external force other than for maintaining the water-tightness.
Excessive compression force more than necessary to keep the watertightness does not act on the watertight rubber, and as a result, the amount of deformation of the watertight rubber is small and breakage is less likely to occur, thus improving the structural integrity.

[0013]

In summary, according to the present invention, the inner surfaces of the end portions of the double shells of the front and rear pair of the submerged boxes are circumferentially attached to each other and pleated steel sheets for connecting inner plates are provided on the middle portion of each other. In the structure of the watertight joint of the submerged box to be connected, the front submerged box side overhanging plate that projects over the entire outer periphery of the rear end of the double shell of the front submerged box and has a rear gap, and the rear submerged box A rear submerged box side projecting plate which is a front end of the double shell and is coaxially and circumferentially projected inside or outside the front submersible box side projecting plate and has a front gap, and the both projecting plates. An annular watertight rubber is installed between the front end and the front end face of the double shell of which the front end is locked to the rear end of the double shell of the front sunk box and the rear end is locked to the front end of the double shell of the rear sunk box. ，
By providing a plurality of coil springs arranged in parallel along the rear end face at appropriate intervals in the circumferential direction, and by preventing an external force other than water-tightness retaining force from acting on the water-tight rubber, the water-tightness is maintained. Since an excessive compression force more than necessary does not act on the watertight rubber, as a result, the amount of deformation of the above watertight rubber is small and breakage is less likely to occur, and therefore, a watertight joint structure of a submerged box excellent in maintainability is obtained. The present invention is extremely useful industrially.

[Brief description of drawings]

1 shows an embodiment in which the present invention is applied to the watertight joint portion structure of a known submerged box shown in FIG. 2, and (A), (B), and (C) are horizontal sectional views, respectively.

FIG. 2 shows a watertight joint portion of a known submerged box, (A) is a perspective view showing front and rear submerged boxes before being connected by the watertight joint,
(B) is a partial horizontal sectional view showing a state where (A) is connected by a watertight joint, and (C) is a partially enlarged view showing a state before connection of the watertight rubber 04 in (B).

[Explanation of symbols]

1 Mounting overhanging plate 3 Watertight rubber 4 Bolt 5 Compression overhanging plate 6 Coil spring 7 Compressive force 8 Tensile force 01a Double shell 07 Crimped steel plate C ₁ Clearance C ₂ Clearance

Claims (1)

[Claims] 1. Watertightness of submerged boxes in which inner surfaces of end portions of double shells of a pair of front and rear submerged boxes are circumferentially attached to each other and are connected to each other by a pleated steel plate for inner plate connection which is pleated in an intermediate portion. In the joint structure, there are a front submerged case side projecting plate that projects over the entire outer periphery of the rear end of the double shell of the front submerged box and has a rear gap, and a front end of the double shell of the rear submerged box. And a rear submersible box-side overhanging plate coaxially and circumferentially projecting inside or outside the front submerged box-side overhanging plate and having a front gap, and an annular pressure fitted between the two overhanging plates. The watertight rubber, the front end is locked to the rear end of the double shell of the front sunk box, the rear end is locked to the front end of the double shell of the rear sunk box, and the circumference is set along the front and rear end surfaces of the double shell. Direction, and a plurality of coil springs arranged in parallel at appropriate intervals. A structure of a watertight joint part of a submerged box, characterized in that an external force other than that for maintaining a tightness is prevented from acting.