A nuclear power station annular double-layer steel plate wall structure whole-circle hoisting tool and method

Abstract

The invention relates to a nuclear power station annular double-layer steel plate wall structure whole-circle hoisting tool and method. The method comprises the steps of hoisting structure load determination, structure finite element model establishment, boundary condition assumption, stress analysis, structure design, hoisting process design and tool design. And connecting node design, structuredetail drawing design, hoisting, rigging model selection and connecting design are carried out according to a calculation result; and determining a tool load test load according to the designed hoisting weight so as to evaluate the bearing capacity of the tool and the bearing capacity of the sling. According to the method, the high-altitude hoisting frequency during SC structure construction can be effectively reduced, the construction period of an on-site key path is shortened, the on-site high-altitude operation amount is reduced, the SC structure construction progress is guaranteed, and theconstruction quality and safety construction are guaranteed.

Description

technical field [0001] The invention relates to the technical field of nuclear power construction and construction, and in particular relates to a ring hoisting tool and method for an annular double-layer steel plate wall structure of a nuclear power plant. Background technique [0002] Rongcheng CAP1400 nuclear power plant is a large-scale advanced pressurized water reactor nuclear power plant with independent intellectual property rights developed by my country on the basis of the introduction of AP1000 third-generation technology nuclear power from Westinghouse Corporation of the United States. It is the world's first reactor type. [0003] The shielding building of the CAP1400 nuclear power plant is one of the most important structures for nuclear power plants to resist internal and external accidents. It has the main functions of radiation shielding, missile protection, passive cooling, and resistance to tornadoes and earthquake events. ability, this project adopts stee...

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Problems solved by technology

[0006] According to the design drawings, the construction period of the 8th to 17th floors of the SC structure is long, the number of unit hoisting is high, the crane is frequently used, the high-altitude operation and hoisting safety risks are high, the construction cost is high, the quality is difficult to control, and the construction is on the key path of the site, which affects the construction of nuclear power plants. duration

[0007] SC structural modules require high installation accuracy: the installation tolerance of radius and elevation is only ±6mm, and at the same time, unit assembly, deformation correction, and welding work are heavy, and limited by high-altitude operation conditions, it is difficult for on-site construction to meet the design requirements

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