JP3760329B2 - Deep water intake equipment and method for forming the same - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a deep water intake facility and a method of forming the same, and more particularly to a deep water intake facility installed at a water intake of a thermal power plant or a nuclear power plant and a method of forming the same.
[0002]
[Prior art]
Conventionally, cooling water used for a condenser of a power plant facility is required to be stably secured in large quantities at a relatively low temperature with little seasonal change of water temperature and daytime change.
[0003]
In general, the surface of seawater has a higher water temperature than the lower layer in summer due to atmospheric radiation, and the temperature is lower in winter. Furthermore, since there are many floating debris in the vicinity of the sea surface, it is desirable to take in the lower-layer clear sea water as cooling water for the power plant. For this reason, there are many cases where deep water intake facilities are installed in thermal and nuclear power plants.
[0004]
FIG. 5 shows a curtain wall-type water intake facility generally installed on a quay or coastal area, where 1 is a submarine ground, 2 is a plurality of steel piles driven obliquely into the ground 1, and 3 is an upper portion of the steel pile 2. Upper concrete for bonding to each other, 4 is a curtain wall attachment attached along one of the steel piles 2, 5 is a curtain wall plate, 6 is for water intake formed between the curtain wall plate 5 and the ground 1 It is an opening, and the lower layer water is taken from this water intake opening 6.
[0005]
[Problems to be solved by the invention]
However, in the conventional deep water intake equipment and the formation method thereof, a hole is formed in the ground 1 using an auger to drive the steel pile 2 into the seabed ground 1 according to the conditions of the installation position, and the steel pile 2 is formed in this hole. It is necessary to insert and insert cement milk, which requires time and labor for drilling, which increases costs and construction time, and it is necessary to take measures against turbid water because turbidity occurs when drilling or cement milk is injected. There was a problem in terms of.
[0006]
The present invention eliminates the above-mentioned drawbacks.
[0007]
[Means for Solving the Problems]
The method of forming a deep water intake facility according to the present invention includes a step of installing a support on the seabed ground, a step of installing a steel truss with a curtain wall attachment on the support, and an underwater formwork on the outer periphery of the steel truss. And a step of placing underwater concrete in the mold and hardening it, and a step of attaching the curtain wall plate to the curtain wall attachment.
[0008]
The deep water intake facility forming method of the present invention includes a step of forming a recess on the seabed ground, a step of installing a support in the recess, and a step of installing a steel truss with a curtain wall attachment mounted on the support. And a step of placing and hardening underwater concrete in the recess, and a step of attaching a curtain wall plate to the curtain wall attachment.
[0009]
The steel truss is manufactured in advance on land.
[0010]
The deep water intake facility of the present invention is characterized by comprising a steel truss, underwater concrete for fixing the steel truss to the ground, and a curtain wall plate attached to the steel truss.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
[0012]
In the present invention, as shown in FIG. 1, when the ground 1 is higher than a predetermined height, the floor 7 is formed by digging the floor to a desired depth, the foundation rubble is thrown in, and leveled by a diver, or the ground If 1 is rock, expose the rock surface and clean it.
[0013]
Next, a support 8 is installed on the above-mentioned foundation rubble or bedrock, and a steel truss 10 with a curtain wall accessory 4 previously formed on land is attached to the support 8 by a hoisting vessel 9 as shown in FIG. Transport and install. Next, as shown in FIG. 3, the underwater mold 11 is installed on the outer periphery of the steel truss 10 installed, and the underwater concrete 12 is placed and solidified in the underwater mold 11 to stabilize the steel truss 10. Thereafter, the curtain wall plate 5 is transported by the hoisting vessel 9 and installed on the stable steel truss 10.
[0014]
Note that underwater concrete may be directly placed in the recess without using the underwater mold 11.
[0015]
【The invention's effect】
Since the deep water intake equipment of the present invention and the formation method thereof are as described above, when the seabed ground at the equipment formation point is a hard rock or the like, it is not necessary to drive a steel pile with an auger or the like. Since it can be assembled on land in advance, there is a great advantage that the work at sea is reduced and the working time and cost can be greatly reduced.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram of a deep water intake facility and a method for forming the same according to the present invention.
FIG. 2 is an explanatory diagram of a deep water intake facility and a method for forming the same according to the present invention.
FIG. 3 is an explanatory diagram of a deep water intake facility and a method for forming the same according to the present invention.
FIG. 4 is an explanatory diagram of a deep water intake facility and a method for forming the same according to the present invention.
FIG. 5 is an explanatory diagram of a conventional deep water intake facility and a method for forming the same.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Ground 2 Steel pile 3 Upper concrete 4 Curtain wall attachment 5 Curtain wall plate 6 Water intake opening 7 Recess 8 Bearing 9 Lifting ship 10 Steel truss 11 Underwater formwork 12 Underwater concrete

Claims (4)

The process of installing the support on the submarine ground, the process of installing the steel truss with the curtain wall attachment on the support, and the installation of the underwater formwork around the steel truss, and the underwater concrete in the formwork A method for forming a deep water intake facility, comprising the steps of placing and curing, and a step of attaching a curtain wall plate to the curtain wall attachment. The process of forming a recess on the seabed ground, the process of installing a support in this recess, the process of installing a steel truss with a curtain wall attachment on the support, and placing underwater concrete in the recess A deep water intake facility forming method comprising: a curing step; and a step of attaching a curtain wall plate to the curtain wall attachment. The deep water intake facility forming method according to claim 1, wherein the steel truss is previously manufactured on land. A deep water intake facility comprising a steel truss, underwater concrete for fixing the steel truss to the ground, and a curtain wall plate attached to the steel truss.

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