Construction method for eliminating concrete shrinkage cracks of steel plate and concrete combined shear wall by preheating steel plate

Abstract

The invention relates to a construction method for eliminating concrete shrinkage cracks of a steel plate and concrete combined shear wall by preheating a steel plate, which comprises the following steps: step 1, laying a heat conduction coil on the steel plate of the shear wall before the steel plate and concrete combined shear wall of a building is constructed; step 2, after the on-site installation of the steel plate of the shear wall is completed, injecting a heat conduction medium with a preset temperature into the heat conduction coil by a heat conduction metal injection system, simultaneously observing the temperature variation of the steel plate of the shear wall by a temperature measurement system to ensure the steel plate of the shear wall to reach a set temperature and generate a certain pre-expansion, and then carrying out concrete pouring construction in the steel plate and concrete combined shear wall; and step 3, after concrete is finally set, according to the shrinkage of the concrete, regulating the temperature and the flow of the heat conduction medium injected into the heat conduction coil by the heat conduction medium injection system so as to control the temperature of the steel plate of the shear wall. According to the method, the temperature of the steel plate of the shear wall can be effectively controlled and the concrete shrinkage cracks caused by inconsistence of deformation of the steel plate of the shear wall and the concrete are avoided.

Description

technical field [0001] The invention relates to construction technology in the construction field, in particular to a method for eliminating concrete shrinkage cracks on a steel plate-concrete composite shear wall. Background technique [0002] With the continuous increase of super high-rise buildings, the application of steel plate-concrete composite shear wall structure is increasing. Compared with the previous structural forms, the steel plate-concrete composite shear wall structure can improve the structural bearing capacity, good seismic performance, and effective Save space inside and outside the core tube. [0003] However, the steel plate-concrete composite shear wall structure system is often used together with high-strength and large-volume concrete. When the concrete hardens and shrinks automatically, due to the inconsistent deformation of the shear wall steel plate and the concrete, the shear wall steel plate has a great impact on the concrete structure. Large c...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a steel plate-concrete composite shear wall preheating steel plate to eliminate

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