Construction method and self-compacting concrete used for ultra-large ring structure with variable cross-section

Abstract

The invention discloses a variable-cross-section oversized annular structure construction method and self-compacting concrete applicable to the same. The method includes: according to flow distance of self-compacting concrete, setting pouring points peripherally along an annular structure body; dividing pouring chambers according to the pouring points, wherein each pouring chamber is at least provided with two pouring points and corresponds to one pouring device; enabling each pouring device to pour self-compacting concrete to each pouring point in the corresponding pouring chamber; enabling the pouring device to pour the self-compacting concrete layer by layer in the corresponding pouring chamber until pouring of the whole annular structure is completed. By adoption of the self-compacting concrete, the defect of difficulty in vibration of concrete in complex-structure variable-cross-section areas with dense reinforcing bars is overcome; by means of chambered multi-point layered construction, the self-compacting concrete is enabled to flow in the reasonable flow distance to uniformly and compactly fill the variable-cross-section oversized annular structure, and consequently, quality and safety of the whole structure are guaranteed.

Description

technical field [0001] The present invention relates to a construction method of self-compacting concrete with super large annular structure with variable cross-section in the field of nuclear power engineering and the self-compacting concrete used therein, more specifically, relates to a sub-silo, multiple Point and layered self-compacting concrete construction methods and the self-compacting concrete used. Background technique [0002] The nuclear island containment of a nuclear power plant is a super large ring structure. The bottom of the nuclear island containment is a super large ring structure with a variable cross section. The cut surface of the ring structure is in the shape of a truncated cone. Nuclear power engineering is related to the safety of nuclear power production. In order to ensure the solidity of the structure, a large number of steel bars are used in the design process, and the reinforcement is dense. In addition, the complex and special structure with ...

AI Technical Summary

Problems solved by technology

[0005] Therefore, the super-large annular structure with variable cross-section in nuclear power projects has dense reinforcement, complex and special structure, and large construction area. Concrete with variable cross-section super large ring structure construction method

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