Easy-to-assemble and disassemble water retaining device for tunnel mouth of power plant circulating water system and its construction method

Abstract

The invention relates to an easily mounting and dismounting type tunnel portal water retaining device of a power plant circulating water system and a construction method thereof. The water retaining device is characterized in that the water retaining device is arranged at the position of a tunnel portal of a mountain and comprises a water retaining plate, a tee steel pulling rod, a jack backseat plate, a valve operation herringbone plate, a recharge water pipe and a jack, the wall of the tunnel portal is of a reinforced concrete structure, the recharge water pipe is buried in the top surface of the wall of the tunnel portal, a valve is arranged on the top of the recharge water pipe, the jack backseat plate is fixed on the wall of the tunnel portal, the water retaining plate is located outside the tunnel portal and is of an independent concrete structure, and the back side of the water retaining plate is in sealing contact with the tunnel portal; one end of the tee steel pulling rod is movably connected with the back side of the water retaining plate and the other end of the tee steel pulling rod is movably connected with the jack backseat plate to form an easily mounting and dismounting type traction structure which prevents the water retaining plate from tumbling or disengaging from the tunnel portal; a rubber waterstop plate is arranged at the position where the water retaining plate is in contact with the tunnel portal to form an elastic natural waterstop structure. The easily mounting and dismounting type tunnel portal water retaining device of the power plant circulating water system and the construction method thereof have the advantages that the water retaining effect is good, operation is convenient, the structure is simple, design and construction are convenient to achieve, the water retaining plate can be dismounted and lifted away conveniently, no residual is left and investment is saved.

Description

technical field [0001] The invention relates to an easily assembled and disassembled tunnel entrance water retaining device, in particular to an easily assembled and disassembled tunnel entrance water retaining device for a circulating water system of a power plant and a construction method thereof. It belongs to the technical field of power plant hydraulics. Background technique [0002] In coastal thermal power projects or nuclear power projects, the circulating water system generally adopts a direct-flow water supply system, that is, water is taken from the sea, and after the cold and heat energy exchange cycle of the power plant, it is discharged back to the sea. Due to the characteristics of the topography and geological conditions of the site, as well as considering factors such as technical and economic conditions, the water intake or drainage channels of many projects need to be realized by tunnels passing through the mountain. The intake / drainage tunnels are genera...

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Problems solved by technology

[0009] One of the purposes of the present invention is to overcome the large investment, difficulty in removing the water retaining wall, unclean slag removal, and poor The water flow in the tunnel has some disadvantages such as certain influence, and an easy-to-assemble and disassemble tunnel mouth water retaining device for the circulating water system of the power plant is provided

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