JP4053182B2 - 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 previously installed on the horizontal portion 2b on the reservoir side of the dam weir body 2, and the bottom door contact 3 and the side door contact previously installed on the concrete surface 2a. The work space 5 is secured in the interior by keeping the watertight with a watertight hardware not shown.
[0005]
[Problems to be solved by the invention]
By the way, the above-described underwater provisional cutoff facility only needs to secure a work space only during the construction period. Conventionally, as shown in FIG. A P-type watertight rubber 6 is attached with bolts and nuts via a presser plate 7 and a metal fitting 8 serving as a contact surface of the watertight rubber 6 is welded to the upper part on the front side so as to be superposed vertically. The water tightness between the blocks 1a was secured.
[0006]
However, since the surface of the concrete surface 2a and the like of the dam weir body 2 for installing the underwater temporary cutoff facility is not as smooth as the metal surface, the watertight rubber 6 described above is completely used after the underwater temporary cutoff facility is installed. In such a case, water leakage occurs between the water-tight rubber 6 and the metal receiving piece 8, and the work space is opened from the gap 9 on the rear surface side between the blocks 1 a arranged in a superposed manner up and down. There was a problem that the water leaked out toward 5. Further, the water-tight part on the front side using the water-tight rubber 6 described above has a large number of parts, and further, a bolt hole processing for pressing the water-tight rubber 6 is necessary, so that the work time is increased and the cost is increased. It was the cause. Furthermore, the watertight rubber 6 may come into contact with the metal portion, that is, the metal fitting 8 during installation adjustment on site, and the watertight rubber 6 may be damaged.
[0007]
The present invention has been made in view of the problems of the conventional underwater provisional shut-off equipment described above, and has a simple structure and is effective in leaking water between blocks arranged vertically and vertically. It is an object of the present invention to provide an underwater provisional shut-off facility that can prevent the watertight rubber from being damaged during installation on site.
[0008]
[Means for Solving the Problems]
In order to achieve the object mentioned above, in water tentative deadline equipment of the present invention, a gold material on the lower front of each block of the caisson, also welding the hardware receiving the front upper, receiving hardware before Kikin product the contact surface with the sequentially attaching a water-swelling rubber spacer from the front side, and, without the height of the water swelling rubber during installation slightly lower than the height of the spacer, after installation is completed, the water swelling rubber expansion By doing so, the gap between the blocks arranged above and below is completely sealed, and the doors are in a watertight state . And by doing this, the number of parts in the watertight part on the front side can be reduced, the work time can be shortened and the cost can be reduced, and water leakage from the blocks arranged in a superposed manner can be effectively prevented In addition, the watertight rubber is not damaged when installed on site.
[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 of 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 bottom door per side and placed on the side door via a leg, constitute a caisson. gold was at the bottom front of each block, also welding the hardware receiving the upper front, the contact surface with the receiving hardware before Kikin was sequentially fitted with water-swelling rubber spacer from the front side, and installation The height of the water-swelling rubber is slightly lower than the height of the spacer, and after installation is completed, the water-swelling rubber expands to completely seal the gap between the blocks placed above and below, and the door is watertight It is a state .
[0010]
In water tentative deadline equipment of the present invention, since the post-weld provisionally assembled hardware receiving the gold was in each factory, the manufacturing accuracy is improved, because it uses a water-swelling rubber as watertight rubber, up and down the polymerization form It is possible to effectively prevent water leakage between the arranged blocks. For the same reason, the number of parts in the watertight part on the front side can be reduced, the working time can be shortened, and the cost can be reduced. Furthermore, the watertight rubber is not damaged during the installation at the site due to the action of the spacer.
[0011]
【Example】
Hereinafter, the underwater temporary cutoff facility of this invention is demonstrated based on one Example shown in FIG.
1 (a) is a main portion side view showing the cross-sectional front portion of the caisson constituting the water tentative deadline equipment of the present invention, (b) is a perspective view of a gold compound, (c) is a perspective view of a receiving hardware is there.
[0012]
1, 11 is a caisson constituting the water tentative deadline equipment of the present invention, each block 11a constituting the caisson 11, the gold was 12 on the front lower portion, also in the upper front portion receives hardware 8 Welded. Incidentally, hardware 8 receives these gold compounds 12 determines welding the mounting position when the temporary assembly in the factory.
[0013]
13 is a water-swelling rubber provided on the contact surface between the receiving hardware 8 before Kikin product 12, which was mainly composed of special urethane having a water swellable molecular structure itself, hardness of about 30 (JIS In A), when water is absorbed, the volume and weight expand to exhibit a water stop effect. The water-swollen rubber 13 is affixed to the contact surface of the receiving hardware 8 in gold was 12 before installation in the field.
[0014]
14 of the contact surface between the receiving hardware 8 in the same Ku gold product 12 is a metal spacer example provided on the rear side of the water swelling rubber 13, the height of the spacer 14 of the water-swelling rubber 13 high It is slightly higher than that. By doing in this way, it can prevent that the water swelling rubber | gum 13 contacts with a metal part, ie, the metal receiving object 8, and is damaged at the time of installation.
[0015]
The underwater provisional shut-off equipment of the present invention is configured as described above, and after the installation is completed, the water-swelling rubber 13 expands to completely seal the gap between the blocks 11a arranged above and below, so that the doors are watertight. A state is assumed.
[0016]
In water tentative deadline equipment of the present invention, since the gold was 12 and the receiving hardware 8 is welded after preassembled in each factory, manufacturing accuracy is improved. Since the water-swelling rubber 13 is used in place of the conventional P-type rubber as the water-tight rubber, the blocks 11a and 11a arranged in a superposed manner in the upper and lower sides are completely sealed, and between the blocks 11a and 11a. Prevent water leakage. For the same reason, the number of parts in the watertight part on the front side can be reduced, the working time can be shortened, and the cost can be reduced. Furthermore, since the height of the spacer 14 is slightly higher than the height of the water-swelling rubber 13, the water-swelling rubber 13 is not damaged during installation on site.
[0017]
In this embodiment, the bottom door unit 3 that supports the caisson 1 from below is installed on the horizontal part 2b of the dam weir body 2, but it may be installed on the lower front surface of the side door unit 4.
[0018]
【The invention's effect】
As described above, in water tentative deadline equipment of the present invention, since the hardware receiving the gold was welded after preassembled in each factory, manufacturing accuracy is improved. In addition, water-swelling rubber is used as the water-tight rubber instead of the conventional P-type rubber, so that water leakage between the blocks arranged in a polymer form at the top and bottom can be effectively prevented.
[0019]
In addition, the underwater provisional shut-off facility of the present invention can reduce the number of parts in the watertight part on the front side for the same reason, and the working time can be shortened and the cost can be reduced. Further, since the height of the spacer is slightly higher than the height of the water-swelling rubber, the water-tight rubber is not damaged when installed on site.
[Brief description of the drawings]
1 (a) is a fragmentary side view showing the cross-sectional front portion of the caisson constituting the water tentative deadline equipment of the present invention, (b) is a perspective view of a gold compound, (c) receives perspective of hardware FIG.
2A is a schematic plan view of a conventional underwater temporary cutoff facility, FIG. 2B is a front view of FIG. 2A, and FIG. 2C is a side view of FIG.
FIG. 3 is a side view of an essential part showing a cross section of a front part of a caisson constituting a conventional underwater temporary cutoff facility.
[Explanation of symbols]
2 dams Sekitai 2a concrete surface 2b horizontal portion 3 bottom doorstop 4 side doorstop 5 working space 8 receiving hardware 11 caisson 11a block 12 gold was <br/> 13 water swelling rubber 14 spacer

Claims (1)

Side doors installed on the concrete side of the reservoir side of the dam weir body via watertight hardware,
Through the watertight hardware on the horizontal part of the reservoir side of the dam weir body, or at the bottom door per side door,
It is arranged in a superposed manner on this bottom door contact, and comprises a caisson installed on the side door contact through a leg,
Gold was at the bottom front of each block of the caisson, also welding the hardware receiving the upper front,
The contact surface with the receiving hardware before Kikin was sequentially fitted with water-swelling rubber spacer from the front side,
And, the height of the water swelling rubber during installation without slightly lower than the height of the spacer, after installation is completed, fully closed the gap between the water swelling rubber is arranged vertically by expansion block, the door An underwater temporary shut-off facility characterized in that the space is in a watertight state .

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