Installation process of sinking pipe for offshore water intake and discharge in power plant

Abstract

The invention discloses an installation process of a sinking pipe for offshore water intake and discharge in a power plant. The installation process comprises the following steps of: prefabricating the sinking pipe, loading the sinking pipe, transporting by a semi-submersible barge, installing a steel floating box, submerging the semi-submersible barge, lifting the sinking pipe, positioning the sinking pipe, sinking and butting the sinking pipe, pulling tightly and closely, removing the steel floating box, and removing a measuring tower, a front-section jack and an installing fastener plate. The installation process disclosed by the invention has the advantages that the sinking pipe is installed by adopting floating support of the steel box, so that the problem of insufficient buoyancy of the sinking pipe is solved; the installing accuracy of the sinking pipe can be ensured to meet the requirements of the design and specifications; and by optimization of the process for removing the steel floating box, a foundation bed of the next section of the sinking pipe can be effectively protected, the engineering cost also can be reduced, and the construction period can be shortened.

Description

technical field [0001] The invention relates to an installation process of a submerged pipe for taking water out of the sea of ​​a power plant. Background technique [0002] With the continuous development of economy and society, electricity consumption is also increasing rapidly. In order to meet people's production and living electricity demand, the main way is to rebuild, expand and increase the capacity of power plants, many of which are thermal power plants and nuclear power plants. 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 ins...

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Problems solved by technology

[0003] 1) The foundation of the immersed tube adopts the structural form of the crushed stone bed. During the dismantling of the steel buoyancy tank, it is easy to cause damage to the crushed stone bed of the next section of the immersed tube;

[0004] 2) The prefabricated immersed tube is bulky and heavy, and the immersed tube itself does not have a closed space, and the buoyancy provided by itself is small;

[0006] 4) The number of immersed tubes is large, the installation line is long, and the precision control requirements of the installation plane position of the immersed tube are high. If the control is not in place, it is easy to cause a large cumulative error

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