A method for assembling a large steel structure module of a nuclear power plant

Abstract

The invention discloses an assembling method of a large steel structure module of a nuclear power plant. The large steel structure module is divided into a plurality of module assembles according to areas. Each module assembly comprises a plurality of sub-modules. A coordinate system is established through the module assemblies, the point DP of one sub-module serves as the origin of coordinates, relative coordinates of the points DP of the rest of the sub-modules are obtained through conversion according to the design paper, the sub-modules are assembled according to the design paper, and three-dimensional coordinate monitoring is carried out on the points DP of the sub-modules through a total station in the assembling process so as to ensure the precision in the splicing process. The assembling method has the beneficial effects that procedures are simple, the splicing size can be controlled integrally, three-dimensional coordinate monitoring of the points DP is carried out through the total station, it is ensured that the points DP of the wall sub-modules are located on the same horizontal datum plane, and therefore the precision required by design is achieved.

Description

technical field [0001] The invention relates to the technical field of nuclear power plant construction, in particular to a method for assembling a large steel structure module of a nuclear power plant. Background technique [0002] AP1000 nuclear power plant is an advanced pressurized water reactor power plant based on AP600 launched by Westinghouse Corporation of the United States. Its construction is characterized by the extensive use of modular construction. The sub-modules made in the prefabrication yard are assembled on site, and the modules are hoisted as a whole after assembly. Among them, CA01, CA20, CA03 and other modules have large structural size, heavy weight, and high assembly accuracy requirements. The CA01 module has a "pin"-shaped structure as a whole, consisting of 48 sub-modules, with a maximum length of 26.74 meters and a maximum width of 28.96 meters. The maximum height of the surface is 22.86 meters, the minimum height is 15.92 meters, and the total wei...

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Problems solved by technology

[0004] At present, the domestic assembly of structural modules adopts horizontal assembly components. The components are turned upside down and finally assembled into a whole. In this way, the components are relatively independent, which is not conducive to the DP point in the final assembly process. The adjustment of the assembly cannot guarantee the accuracy of the assembly. The weight of the components is large and the shape is irregular. It is difficult to determine the center of gravity during the erection and flipping process.

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