JP2000064255A - Underwater temporary closing equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an underwater temporary closing equipment in which an anchor to tighten a caisson to a weir body of dam and separately necessary in a conventional practice, can be dispensed with, and a turn-buckle type hardware can be smaller in size. SOLUTION: This underwater temporary closing equipment is provided with a side part gate guide 1 to be installed on a concrete surface 2a on the reservoir side of a weir body of dam 2 through a watertight piece, a bottom part gate guide 3 to be installed on a horizontal part 2b on the reservoir side of the weir body of dam 2 through a watertight piece, and a caisson 1 to be arranged on the bottom part gate guide 3 in a lapped manner and installed on the side part gate guide 11 through a leg part 1aa. The side part gate guide 11 is formed of L-shaped in plan view and arranged so that projecting parts 11a are located on the outer side. The leg part 1aa of the caisson 1 is received between the projecting parts 11a, and the load in the horizontal direction is supported by the projecting part 11a. The projecting part 11a and the caisson 1 are tightened close to each other by turn-buckle type hardware 12.

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an underwater temporary cut-off which is attached to a dam dam to separate the dam dam and a reservoir, for example, when an improvement work of a dam facility is performed. It concerns equipment. 2. Description of the Related Art For example, when an improvement work of a dam facility is performed,
Prior to the construction, a temporary underwater cutoff facility will be temporarily installed on the concrete surface of the dam dam on the reservoir side to separate the construction part of the dam dam from the reservoir. Hereinafter, a conventional underwater temporary shutoff facility will be described with reference to FIG. In FIG. 2, reference numeral 1 denotes a caisson, which is a box-shaped structure attached to a concrete surface 2a of the dam dam 2 on the reservoir side to secure a certain working space. The caisson 1 has a U-shaped ramen structure in plan view, and is horizontally divided into a plurality of blocks 1a in the height direction. A caisson 1 is installed on a bottom door stop 3 previously installed on a horizontal portion 2b of the dam dam 2 on the reservoir side, and the bottom door 3 and the side previously installed on the concrete surface 2a are provided. The work space 5 is secured inside by maintaining a watertight state by a watertight hardware which is integrated with the unit door 4 and is not shown. [0005] In the underwater temporary shut-off facility having the above-mentioned structure, as shown in FIG. 2, a dam is required to resist dynamic water pressure during an earthquake and inertial force during an earthquake due to the weight of a caisson. An anchor 6 was attached to the weir 2 and the caisson 1 was tightened by a turnbuckle-type metal member 7. However, in the conventional underwater temporary shut-off facility as described above, a large number of anchors 6 for tightening the caisson 1 on the dam dam 2 are required in addition to the anchors 8 for attaching the side door stops 4 to the dam dam body 2. There was a problem that the time required for the long time. SUMMARY OF THE INVENTION The present invention has been made in view of the problems of the above-mentioned conventional underwater temporary cut-off facility, and has an underwater temporary cut-off which can omit an anchor for tightening a caisson in a dam dam body. It is intended to provide facilities. [0008] In order to achieve the above-mentioned object, in the underwater temporary closing facility of the present invention, the side door stop is formed in an "L" shape in plan view, and the projecting portion is formed. Arrange them so that they are located outside each other.The caisson legs are received between these protrusions to support the lateral load with the protrusions, and the space between the protrusions and the caisson is tightened with turnbuckle-type hardware. ing. By doing so, the anchor for attaching the side door stop can also serve as the anchor for tightening the caisson in the dam dam body. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The underwater temporary shutoff facility of the present invention includes a side door stop installed on a concrete surface of a dam dam body on a reservoir side through a watertight metal and a dam dam body on a reservoir side. A bottom door stop installed on a horizontal portion through a watertight metal piece or on the side door stop, and is arranged on the bottom door stop in an overlapping manner and installed on the side door stop via a leg portion. The caisson is provided, the side door stop is formed in an “L” shape in plan view, the protrusions are arranged so as to be located outside each other, and the legs of the caisson are received between these protrusions, The lateral load is supported by the protrusion, and the space between the protrusion and the caisson is tightened by turnbuckle-type hardware. In the underwater temporary shut-off facility of the present invention, since the lateral load is supported by the protruding portion of the side door, the turnbuckle type hardware only needs to bear the vertical load.
Therefore, the anchor for attaching the side door stop,
The dam weir can also serve as an anchor for tightening the caisson, and the conventionally required separately required anchor for tightening the caisson on the dam weir can be omitted. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An underwater temporary shutoff facility according to the present invention will be described below with reference to an embodiment shown in FIG. In FIG. 1, the same reference numerals as those in FIG. 2 indicate the same or corresponding portions, and a detailed description thereof will be omitted. FIG. 1A is a schematic plan view of an underwater temporary shutoff facility of the present invention, and FIG. 1B is a front view of FIG. In FIG. 1, reference numeral 11 designates a pair of left and right side door stops which constitute the underwater temporary shutoff facility of the present invention. For example, as shown in FIG. It is formed and fixedly arranged on the concrete surface 2a of the dam dam body 2 by the anchor 8 so that the protruding portions 11a are located outside each other. As described above, the leg portions 1aa of the blocks 1a constituting the caisson 1 are received between the projecting portions 11a of the paired side door stops 11 fixedly arranged on the dam weir 2, and these pairs are formed. The load in the horizontal direction (the left-right direction in FIG. 1A) is supported by the protrusion 11 a of the side door stop 11. Numeral 12 is a turnbuckle type hardware.
It is interposed between the protrusion 11a of the side door stop 11 and the leg 1aa of each block 1a constituting the caisson 1, and tightens each block 1a constituting the caisson 1 to the dam dam body 2 side. In the underwater temporary shutoff facility of the present invention having the above-described structure, the laterally acting load is supported by the protrusions 11a of the side door stops 11 via the legs 1aa of the blocks 1a constituting the caisson 1. I'm going to let it. With such a configuration, in the underwater temporary closing facility according to the present invention, the hardware 7 is horizontally and vertically oriented as shown in FIG. Instead of taking charge of the load in the vertical direction on the paper in FIG.
Only needs to bear the load in the vertical direction. Therefore, in the underwater temporary shutoff facility of the present invention, the anchor 8 for attaching the side door stop 11 can also serve as the anchor for tightening the caisson in the dam dam body 2. In addition, the anchor 6 for tightening the caisson 1 on the dam dam body 2 which is separately required can be omitted. In addition, the turnbuckle-type hardware 12 may be thinner than the conventional hardware 7. In this embodiment, the bottom door stop 3 for supporting the caisson 1 from below is installed on the horizontal portion 2b of the dam dam body 2. However, the bottom door stop 3 is installed on the lower front surface of the side door 11. May be. As described above, according to the underwater temporary shut-off facility of the present invention, since the lateral load is supported by the protruding portions at the side doors, the turnbuckle-type hardware can be used vertically. Only the load in the direction is required, and the anchor for attaching the side door stop can also serve as the anchor for tightening the caisson in the dam dam body. Therefore, an anchor for tightening the caisson on the dam dam body, which is conventionally required separately, can be omitted. For the same reason, in the underwater temporary shut-off facility of the present invention, the turnbuckle-type hardware may be thinner than the conventional hardware.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 (a) is a schematic plan view of an underwater temporary shutoff facility of the present invention, and (b) is a front view of (a). FIG. 2A is a schematic plan view of a conventional underwater temporary shutoff facility, and FIG. 2B is a front view of FIG. [Description of Signs] 1 Caisson 1aa Leg 2 Dam dam 2a Concrete surface 2b Horizontal section 3 Bottom door 11 Side door 11a Projection 12 Hardware

Continuation of front page    (72) Inventor Koichi Miyamoto             1-7-89 Minami Kohoku, Suminoe-ku, Osaka-shi, Osaka             No. Within Hitachi Zosen Corporation

Claims (1)

[Claim 1] A side door installed on a concrete surface of a dam dam body on a reservoir side through a watertight fitting, and a horizontal door on a reservoir side of the dam dam body on a reservoir side via a watertight fitting. Or a bottom door stop installed on the side door stop, and a caisson disposed on the bottom door stop in an overlapping manner and installed on the side door stop via a leg, The door stop is formed in an "L" shape in a plan view, and arranged so that the projections are located outside each other. The legs of the caisson are received between the projections, and the lateral load is applied by the projections. Underwater temporary shut-off facility characterized in that it is supported and the space between the projection and caisson is tightened with turnbuckle-type hardware.