A kind of steel arched roof structure of nuclear power plant and its assembly construction method

Abstract

The invention discloses a steel arched roof structure of a nuclear power plant and an assembly construction method thereof. The arched main girders of the steel arched roof structure are distributed in parallel at intervals and connected by arched secondary beam units to form an arched roof skeleton, and the roof structure panels are welded on the The upper surface of the arched roof skeleton forms a sealed steel arched roof structure. The steel arched roof structure assembly construction method is through the assembly of the arched main beam plane assembly, the arrangement of the assembly support system, the vertical assembly of the main beam plane assembly and the four-pipe column support, the vertical assembly of the arched main beam, the assembly of the arched secondary beam unit, Positioning accuracy adjustment, assembly of the arched roof frame, assembly of roof structure panels and assembly of the entire arched roof, and finally dismantling and assembling the support system and assembly positioning system, and finally assembling into a steel arched roof structure; this assembly construction method can significantly reduce structural deformation, It simplifies the construction process, improves the installation accuracy, and improves the construction efficiency, and can be applied to the construction field of the same type of structure.

Description

technical field [0001] The invention belongs to the technical field of building construction, and in particular relates to a steel arched roof structure of a nuclear power plant and an assembly construction method thereof. Background technique [0002] As the roof structure of the new reactor type nuclear power plant, the steel arched roof structure needs to ensure the sealing performance of the roof while meeting the structural requirements. In the construction of nuclear power plants that have been built or are currently under construction, there is no precedent for this type of roof structure; In the construction of similar structures, on-site assembly of small parts is often used, which has disadvantages such as cumbersome assembly process, difficult to control precision, long assembly cycle, frequent use of hoisting equipment, long time for high-altitude operations, and high safety risks. The steel arched roof is a single-curved arc structure with large span, high heigh...

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Problems solved by technology

[0002] As the roof structure of the new reactor type nuclear power plant, the steel arched roof structure needs to ensure the sealing performance of the roof while meeting the structural requirements. In the construction of nuclear power plants that have been built or are currently under construction, there is no precedent for this type of roof structure; In the construction of similar structures, on-site assembly of small parts is often used, which has disadvantages such as cumbersome assembly process, difficult to control precision, long assembly cycle, frequent use of hoisting equipment, long time for high-altitude operations, and high safety risks.

The steel arched roof is a single-curved arc structure with large span, high height, thin panels, and heavy weight. The assembly is difficult and risky, and the construction process is complicated. The construction method of on-site assembly of small parts will take a long time for the hoisting equipment. Moreover, there are many cross-constructions, high construction costs, and difficult to predict construction safety and quality risks

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