Installing process of offshore water taking head caisson of power plant

Abstract

The invention discloses an installing process of an offshore water taking head caisson of a power plant. The installing process comprises the following steps of water taking head prefabrication, water taking head loading out, semi-submersible barge transportation, semi-submersible barge submergence, water taking head hanging and transportation, water taking head positioning, water taking head sinking installation and water taking head closing elimination. By adopting the installing process of the offshore water taking head caisson of the power plant, a project wharf under construction is effectively utilized as a prefabrication site, existing ship equipment is utilized for transportation and installation, the transportation safety of the water taking head caisson is ensured, the installing precision of the water taking head caisson is also ensured, the design and code requirements are met, the project quality is effectively improved, project construction costs can be also reduced, and a construction period can be shortened.

Description

technical field [0001] The invention relates to an installation process for a caisson of a water intake head at sea in a power plant. Background technique [0002] Both thermal power generation and nuclear power generation need to cool the power generation equipment, which requires a large amount of cooling water. Therefore, most large-scale nuclear power plants and thermal power plants are located close to bays, estuaries, lakes, reservoirs, etc., so as to use water resources to achieve cooling on the spot. The intake and drainage immersed tube engineering is one of the important factors that determine the thermal efficiency of power plants. The water intake pipe is composed of twenty sections of water intake immersed tubes, of which the first section to the thirteenth section are double-hole pipes, and the fourteenth section is a double-hole co-wall pipe transitioning to two single-hole pipes in a "Y" shape, so Take two circular head caissons. The structure of the intak...

AI Technical Summary

Problems solved by technology

[0003] 1) The structure of the water intake caisson itself does not have a closed space, and it cannot float on its own after being launched into the water. The self-weight after no water is about 1650t, and the maximum lifting force that the eight lifting points of the water intake can bear is only 450t (6× 75t), buoyancy measures must be adopted before installation;

[0004] 2) The water intake caisson is an eccentric structure, and the side of the water outlet is heavy, so the balance is difficult to control during the hoisting process;

[0005] 3) The water intake caisson is different from the conventional gravity wharf caisson. Due to the water intake function, there is no compartment in the caisson chamber, and the water pressure cannot be divided into separate chambers to control the balance during the installation process;

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