JP4056635B2 - Underwater temporary cutoff facility - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an underwater provisional cutoff facility that is attached to a dam weir body so as to separate the dam weir body and a reservoir when, for example, improvement work for a dam facility is performed.
[0002]
[Prior art]
For example, when improving a dam facility, prior to the construction, an underwater temporary cutoff facility is temporarily attached to the concrete surface of the dam weir on the reservoir side, and the construction part and the reservoir in the dam weir are separated. Hereinafter, a conventional underwater temporary cutoff facility will be described with reference to FIG.
[0003]
In FIG. 2, reference numeral 1 denotes a caisson, which is a box-shaped structure that is attached to the concrete surface 2 a on the reservoir side of the dam weir body 2 in order to secure some work space. The caisson 1 has a “U” -shaped ramen structure in a plan view, and is horizontally divided into a plurality of blocks 1 a in the height direction.
[0004]
The caisson 1 is installed on the bottom door contact 3 preliminarily installed in the horizontal portion 2b on the reservoir side of the dam weir body 2, and this side door contact 3 and the side door contact preinstalled on the concrete surface 2a. The work space 5 is secured in the interior by keeping the water tight with a watertight hardware not shown in the figure.
[0005]
[Problems to be solved by the invention]
By the way, in the underwater temporary cutoff facility having the above-described structure, an anchor 6 is attached to the dam weir body 2 as shown in FIG. The caisson 1 was tightened with the hardware 7.
[0006]
However, in the conventional underwater provisional cutoff facility as described above, many anchors 6 for tightening the caissons 1 to the dam weir body 2 are required in addition to the anchors 8 for attaching the side doors 4, and the time required for assembly is required. There was a problem that would become longer.
[0007]
The present invention has been made in view of the problems of the above-described conventional underwater provisional cutoff equipment, and provides an underwater provisional cutoff equipment that can omit an anchor for tightening the caisson to the dam weir body. The purpose is to do.
[0008]
[Means for Solving the Problems]
In order to achieve the above-described object, in the underwater provisional shut-off equipment of the present invention, the side door contacts are formed in an “L” shape in plan view, and are arranged so that the protruding portions are located outside each other. The caisson legs are received between the parts, and the lateral load is supported by the protrusions, and the turnbuckle type hardware is tightened between the protrusions and the caisson. And by doing in this way, it becomes possible to make the anchor for attaching the side door stop also serve as the anchor for tightening the caisson to the dam weir body.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
The underwater provisional cutoff facility according to the present invention is provided with a side door installed on the concrete surface on the reservoir side of the dam weir body via a watertight metal fitting and a horizontal portion on the reservoir side of the dam weir body via a watertight metal fitting, or A bottom door per door installed per side door and a caisson disposed on the side door via a leg, and arranged in a superposed manner on the bottom door per side door, Is formed in an “L” shape in plan view, and is arranged so that the protrusions are located outside each other, and the caisson legs are received between the protrusions to support the lateral load by the protrusions. In addition, the turnbuckle-type hardware is tightened between the protrusion and the caisson.
[0010]
In the underwater provisional shut-off equipment of the present invention, the lateral load is supported by the protruding portion per side door, so that the turnbuckle-type hardware only needs to bear the longitudinal load. Accordingly, the anchor for attaching the side door contact can also be used as the anchor for tightening the caisson to the dam weir body, and the conventionally required anchor for tightening the caisson to the dam weir body is omitted. be able to.
[0011]
【Example】
Hereinafter, the underwater temporary cutoff facility of this invention is demonstrated based on one Example shown in FIG. In FIG. 1, the same reference numerals as those in FIG. 2 denote the same or corresponding parts, and detailed description thereof is omitted.
Fig.1 (a) is a schematic plan view of the underwater temporary cutoff equipment of this invention, (b) is a front view of (a).
[0012]
In FIG. 1, 11 is a pair of side doors that are paired on the left and right sides that constitute the underwater provisional shut-off equipment of the present invention. For example, as shown in FIG. The anchors 8 are fixedly disposed on the concrete surface 2a of the dam weir body 2 so that the protruding portions 11a are located on the outside.
[0013]
And as mentioned above, the leg part 1aa of each block 1a which comprises the caisson 1 is received between the protrusion parts 11a of the side part door 11 which makes a fixed arrangement to the dam weir body 2, and the side doors which make these pairs Loads in the lateral direction (left and right direction in FIG. 1A) are supported by the 11 protruding portions 11a.
[0014]
Reference numeral 12 denotes a turnbuckle-type hardware, which is interposed between the protruding portion 11a of the side door 11 and the leg portion 1aa of each block 1a constituting the caisson 1, and each block 1a constituting the caisson 1 is a dam. It tightens to the weir body 2 side.
[0015]
In the underwater temporary closing facility of the present invention having the above-described configuration, the load acting in the lateral direction is supported by the protruding portion 11a of the side door 11 through the leg portion 1aa of each block 1a constituting the caisson 1. Yes.
[0016]
By adopting such a configuration, in the underwater temporary closing facility of the present invention, the hardware 7 is in the horizontal and vertical directions (FIG. 1A) like the turnbuckle-type hardware 7 in the conventional underwater temporary closing facility. The turnbuckle-type hardware 12 only needs to handle the load in the vertical direction, not the load in the vertical direction of the paper).
[0017]
Therefore, in the underwater provisional shut-off equipment of the present invention, the anchor 8 for attaching the side door contact 11 can be used as the anchor for tightening the caisson to the dam weir body 2 and is conventionally required. The anchor 6 for tightening the caisson 1 to the dam weir body 2 can be omitted. In addition, the turnbuckle-type hardware 12 may be thinner than the conventional hardware 7.
[0018]
In this embodiment, the bottom door unit 3 that supports the caisson 1 from below is installed on the horizontal portion 2b of the dam weir body 2, but it may be installed on the lower front surface of the side door unit 11.
[0019]
【The invention's effect】
As described above, according to the underwater provisional shut-off equipment of the present invention, the lateral load is supported by the protrusions on the side doors, so the turnbuckle-type hardware can only handle the vertical load. What is necessary is just to make the anchor for attaching the side door stop also serve as the anchor for tightening the caisson to the dam weir body. Therefore, an anchor for tightening the caisson to the dam weir body, which has been separately required conventionally, can be omitted. For the same reason, in the underwater temporary closing facility of the present invention, the turnbuckle type hardware may be thinner than the conventional one.
[Brief description of the drawings]
FIG. 1 (a) is a schematic plan view of an underwater temporary cutoff facility according to the present invention, and FIG. 1 (b) is a front view of (a).
FIG. 2A is a schematic plan view of a conventional underwater temporary cutoff facility, and FIG. 2B is a front view of FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Caisson 1aa Leg part 2 Dam dam body 2a Concrete surface 2b Horizontal part 3 Bottom door contact 11 Side door contact 11a Projection part 12 Hardware

Claims (1)

Installed on the concrete surface of the reservoir side of the dam weir through the watertight hardware, and installed on the horizontal part of the reservoir side of the dam weir through the watertight hardware or per said side door A bottom door contact and a caisson disposed on the bottom door contact in a superposed manner and installed on the side door contact via a leg, the side door contact being in an “L” shape in plan view The protrusions are arranged so that the protrusions are located outside each other, the caisson legs are received between the protrusions, and the lateral load is supported by the protrusions, and the protrusion and the caisson are turned. An underwater temporary cutoff facility characterized by tightening with buckle-type hardware.

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