JP2600150Y2 - Sunk tunnel - Google Patents

Description

[Detailed description of the invention]

[0001]

The present invention relates to an underground tunnel.
More specifically, it relates to a submerged tunnel that is optimal for an undersea tunnel.

[0002]

2. Description of the Related Art As a method of constructing a submarine tunnel, a method of connecting a large number of submerged boxes by using water pressure in the sea to construct a submerged tunnel is employed. The connection between the submerged boxes
First, one buried box is installed on the sea floor, and a new buried box is placed in front of this existing buried box. At this time, a rubber gasket for sealing is attached to either the existing or new submerged box. When the new buried box is pulled to the existing buried box with a jack or the like and joined, the rubber gasket is temporarily compressed, and the portion surrounded by both buried boxes is sealed. Subsequently, when the seawater in the area surrounded by both buried boxes is drained by a pump etc., the newly built buried box is drawn to the existing buried box by hydrostatic pressure, the rubber gasket is further compressed secondarily and the seal is complete. Becomes At this time,
In addition, in order to complete the seal, the newly installed immersion box may be pressed against the existing immersion box from behind using a heavy machine or the like to further compress the gasket. In this way, the buried tunnels are successively connected to form a buried tunnel.

[0003] The joint surfaces of the two buried boxes were formed perpendicular to the joining direction of the two buried boxes.

[0004]

[Problems to be Solved by the Invention] As described above, since the joint surfaces of the two submerged boxes are formed vertically, when an earthquake or the like occurs, each submerged box is moved along the direction of the mounting surface. When ΔX is separated, the displacement amount ΔY of the opposing interval Y between the two joining surfaces is Therefore, the gasket interposed between the two may be easily stretched, and the sealing performance may be deteriorated.

The present invention has been made in view of the above-mentioned problems, and has as its object to provide a submerged tunnel capable of exhibiting a highly earthquake-resistant seal.

[0006]

According to a first aspect of the present invention, a gasket is sandwiched between a joint surface of one submerged box and a joint surface of another submerged box. In a submerged tunnel constructed by abutting in the direction along the mounting surface in the state, the joint surface of one submerged box is inclined at an inclination angle θ of 20 ° or more and 70 ° or less with respect to the mounting surface. And the joining surface of the other immersion box is inclined at an inclination angle の of 110 ° or more and 160 ° or less with respect to the mounting surface,
The sunk tunnel is characterized in that both inclination angles θ and 沈 are set to 160 ° ≦ (θ + ψ) ≦ 200 °.

According to a second aspect of the present invention, there is provided the sunk tunnel according to the first aspect, wherein a step portion is provided which is constituted by the one immersion box and the other immersion box, and is partitioned at the time of joining the two immersion boxes. An elastic body is interposed between the steps.

[0008]

According to the configuration of claim 1, when an earthquake or the like occurs,
When each immersion box is separated by ΔX along the direction of the mounting surface, the displacement amount ΔY of the opposing interval Y between the two joining surfaces is as follows: ΔY = sin θΔX = sin20 × ΔX ≦ sin70 × ΔX

Further, according to the second aspect of the present invention, the elastic connection between the two submerged boxes can be maintained by the elastic body.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is an enlarged sectional view of a main part of an embodiment of the present invention. In FIG. 1, 1 is
One is a submerged box, and 2 is another submerged box. The two joint surfaces 1 face each other across the gasket 10.
1 and 21 are provided.

The joining surface 11 of one immersion box 1 is
3 is inclined by an inclination angle θ. This inclination angle θ
Can be set to 20 ° or more and 70 ° or less, and is set to 30 ° in the present embodiment. The joining surface 21 of the other immersion box 2 is inclined with respect to the mounting surface 23 by an inclination angle ψ. The inclination angle ψ can be set to 110 ° or more and 160 ° or less, and is set to 150 ° in the present embodiment.

The sum of the inclination angles θ and ψ can be set in the range of 160 ° ≦ (θ + ψ) ≦ 200 °. In this embodiment, it is needless to say that the sum is set to 180 °. I have. Next, shoulders 12 and 22 are formed at the respective ends of both buried boxes 1 and 2, and the shoulders 12 and 22 divide the step 3 at the time of joining. A rubber spring 4 as an elastic body is interposed in the step portion 3 and is compressed in the step portion 3 in the joining direction of the two immersed boxes 1 and 2.

In FIG. 1, reference numeral 5 denotes both joint surfaces 1
This is a water-stopping member for sealing the gap between 1 and 21 and the step portion 3 to stop water. When constructing the submerged boxes 1 and 2 having the above configuration, as in the prior art, first, one submerged box 1 is installed on the seabed, and a newly installed submerged box 2 is installed in front of the existing embedded box 1. Put. At this time, a rubber gasket 10 for sealing and a rubber spring 4 are attached to the existing or newly installed sinking box 1 (2). When the new buried box 2 is pulled to the existing buried box 1 with jacks, both buried boxes 1, 2
The rubber gasket 10 and the rubber spring 4 are temporarily compressed, and the portion surrounded by the two submerged boxes 1 and 2 is sealed. Subsequently, when the seawater in the portion surrounded by the two submerged boxes 1 and 2 is drained by a pump or the like, the newly installed submerged box 2 is further drawn to the existing submerged box 1 by hydrostatic pressure, and the rubber gasket 10 and the rubber spring 4 It is further compressed to complete the seal. At this time, in the present embodiment, since the rubber spring 4 is interposed, the elastic connection state of the two submerged boxes 4 can be maintained, and the load acting on the rubber gasket 10 is reduced. In this way, the buried boxes 2 are sequentially connected to form a buried tunnel.

According to the above configuration, when the submerged boxes 1 and 2 are separated from each other by ΔX along the directions of the mounting surfaces 13 and 23 when an earthquake or the like occurs, the opposing distance Y between the joint surfaces 11 and 21 is set. Is the displacement amount ΔY of ΔY = sin θΔX = sin 20 × ΔX ≦ sin 70 × ΔX As a result, even when the submerged boxes 1 and 2 are displaced in the separating direction, the amount of displacement can be reduced, so that the gasket 10 is prevented from being extended by that much, thereby preventing problems such as water leakage. It has a remarkable effect that it can be performed.

If the inclination angle θ is less than 20 °, or if the inclination angle を exceeds 160 °, the strength of the tip of the submerged box 1 (or submerged box 2) is reduced, and there is a possibility of breakage. Not preferred. On the other hand, when the inclination angle θ exceeds 70 ° or when the inclination angle 未 満 is less than 110 °, the effect of limiting the displacement amount in the opposing distance Y between the two joining surfaces 11 and 21 cannot be sufficiently exhibited, which is not preferable. .

In this embodiment, since the sum of the two inclination angles θ and ψ is set to 180 °, the mounting surfaces 13 and 23 of the two submerged boxes 1 and 2 are placed on the same plane. In addition, the two joining surfaces 11 and 21 can face each other in a posture parallel to each other. As a result, there is an advantage that the compressed state of the gasket 10 is improved. Further, in the present embodiment, since the setting of the two inclination angles θ and ψ is based on the mounting surfaces 13 and 23, there is an advantage that a precise inclination state at the time of joining can be obtained. New buried box 2 replaced with existing buried box 1
When sunk, the two submerged boxes 1 and 2
This is because they are joined close to each other in the direction along 23.

Next, in this embodiment, since the rubber spring 4 can maintain the elastic connection between the two submerged boxes 1 and 2, the load in the direction of expansion and contraction of the gasket 10 can be reduced by that much, thus ensuring reliable operation. There is an advantage that a water stopping function can be achieved. The embodiments described above are merely examples of preferred embodiments of the present invention, and the present invention is not limited to the above embodiments. It goes without saying that various design changes can be made without changing the gist of the present invention.

[0018]

As described above, according to the configuration of the present invention, even when the immersion box is displaced in the separating direction, the displacement amount can be reduced, so that the gasket is extended correspondingly. This has a remarkable effect that it is possible to prevent problems such as water leakage.

In addition to limiting the individual tilt angles θ and ψ,
By setting both inclination angles θ and に to 160 ° ≤ (θ + ψ) ≤ 200 ° , the joint surface of both buried boxes is placed
The gas crosses the surface diagonally and faces almost parallel,
Set both sides in a state in which the
A joint that can be attached to a case and has flexibility
It is possible to obtain a structure. Further, according to the configuration of the second aspect, it is possible to maintain the elastic connection state of the two沈埋a box by an elastic body, the structure of claim 1, wherein
Combined with this flexibility, there is an advantage that the load in the expansion and contraction direction of the gasket can be reduced and a reliable water stopping function can be achieved.

[Brief description of the drawings]

FIG. 1 is an enlarged sectional view of a main part of an embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 One immersion box 2 The other immersion box 3 Step part 4 Rubber spring (elastic body) 10 Gasket 11 Joining surface 13 Placement surface 21 Joining surface 23 Placement surface θ Tilt angle ψ Tilt angle

Claims (2)

(57) [Scope of request for utility model registration] 1. A buried tunnel constructed by abutting a joint surface of one buried box and a joint surface of another buried box in a direction along a mounting surface with a gasket interposed therebetween. The joint surface of the box is inclined at an inclination angle θ of 20 ° or more and 70 ° or less with respect to the mounting surface, and the joint surface of the other immersed boxes is 110 ° or more and 160 ° with respect to the mounting surface. A buried tunnel characterized by the following inclination angle 傾斜, and both inclination angles θ, ψ are set to 160 ° ≦ (θ + ψ) ≦ 200 °. 2. A submerged tunnel according to claim 1, wherein said submerged tunnel is constituted by said one submerged box and another submerged box.
A step is defined at the time of joining the two submerged boxes, and an elastic body is interposed between the steps.