Vertical assembling method for structural modules of nuclear power plant

Abstract

The invention provides a vertical assembling method for structural modules of a nuclear power plant. The vertical assembling method comprises the following steps that firstly, an assembly piece is disassembled with sub-modules as basic units, and the sub-modules are recombined and optimized, and the assembly sequence is determined; then, the placement position around an assembly platform of each sub-module in a site is determined according to the performance of a crane; the first two sub-modules are hoisted to the corresponding positions of the assembly platform; a scaffold is erected outsidethe sub-modules in place; the sub-modules in place are accurately measured and adjusted, the sub-modules are adjusted to the most ideal positions, and then assembling and welding-line welding are carried out; and similarly, the processes of hoisting of the next sub-module, erecting of a scaffold, accurate measuring and adjusting, assembling and welding-line welding are carried out, each follow-upsub-module is completed in sequence according to the assembly sequence, and the assembly advance route can generally be carried out symmetrically on both sides at the same time until all the sub-modules are assembled. The vertical assembling method greatly improves the assembling precision and quality of the structural modules of the nuclear power plant, the use of a large crane is avoid, and theeconomic performance is good.

Description

technical field [0001] The invention relates to a modular construction technology, in particular to a vertical assembling method for structural modules of a nuclear power plant. Background technique [0002] The world's most advanced third-generation nuclear power technology that our country has vigorously introduced has the biggest feature in terms of construction technology is modular construction technology. Modular construction technology is a very advanced construction technology with high efficiency, good quality, low cost, and low pollution. Lightweight and other advantages. The carrier of modular construction technology is the structural module, focusing on large-scale structural modules, such as nuclear power CA01 structural modules and nuclear power CA20 structural modules. Among them, the nuclear power CA01 structure module is the core of the containment plant. The length, width and height of the module exceed 20 meters, and the total weight of the structure is a...

AI Technical Summary

Problems solved by technology

Horizontal assembly is assembled in units of assemblies. Each assembly establishes an independent coordinate system on its own assembly platform. After the assembly is formed, the position of each sub-module is relatively fixed and cannot be adjusted. Then select the sub-module in the assembly. A certain positioning line is used as a reference to align with the positioning line of the final assembly, that is to say, only one line can be used to represent the position of the entire assembly during final assembly, and there will inevitably be deviations in the flatness, verticality or geometric shape of individual sub-modules , the reinforcement holes, openings or pre-embedded panels on the sub-modules will also be out of tolerance and cannot be adjusted; at the same time, due to the error of the vertical position line of each sub-module, the error of the horizontal position line will cause the non-parallel error of the horizontal position line, which will affect the surrounding of the assembly. The angle error of the edge and the width of the weld gap are not conducive to the application of automatic welding; moreover, the quality of the assembly is generally above 100T, and the assembly process requires frequent use of a 500T large crane, which is not economical

Images