Block dismounting and mounting type annular work platform and construction method

Abstract

The invention relates to a block dismounting and mounting type annular work platform and a construction method. The platform comprises at least two triangular supports, a detachable platform is mounted on the triangular supports, the front side end of the detachable platform is connected with supporting structure vertical rods through clamping grooves, hooks are mounted on the front sides of the top ends of the supporting structure vertical rods, retaining devices are arranged at the positions, on the mounting positions of the hooks, of the supporting structure vertical rods, an erected fencetable is mounted on the outer side end of the detachable platform, and a handrail is mounted on the fence table and comprises a #-shaped rail. Handrail rods are mounted on the upper end of the #-shaped rail. The construction method comprises the steps of hook positioning payoff, steel channel mounting, SC structure mounting, triangular support mounting, retaining device mounting, detachable platform mounting and handrail mounting. The work platform is safe and reliable, and it is ensured that nuclear power plant SC structure circumferential welds are paired, and welding is smoothly carried out.

Description

technical field [0001] The invention relates to the technical field of civil construction, in particular to a block-disassembled ring-shaped operating platform and a construction method. Background technique [0002] The CAP1400 nuclear power plant is a large-scale advanced pressurized water reactor nuclear power plant with independent intellectual property rights developed on the basis of the introduction of AP1000 third-generation technology, which is the world's first nuclear power plant. [0003] The CAP1400 nuclear power plant is a double-hull structure, with a CV steel containment vessel on the inside and an SC structure on the outside. The SC structure is one of the most important structures for nuclear power plants to resist internal and external accidents. It has radiation shielding, missile protection, passive cooling, and resistance to tornadoes. In order to further improve the ability of the reactor building to resist internal and external accidents, the steel pl...

AI Technical Summary

Problems solved by technology

[0007] Manual handling: As mentioned above, the construction of the SC structure is behind the CV. The working platform of the CV is higher than the top level of the SC structure, and the width is about 1m. This part of the working platform closes the vertical space above the SC structure and cannot be installed with lifting equipment.

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