A method for preventing cracking in an underground super-long concrete structure

Abstract

The application provides a crack resistance method for an underground super-long concrete structure, relates to the technical field of concrete structure crack resistance, and comprises the following steps: a temperature field model of a target structure is established, the environmental temperature value of the target structure is predicted through multi-heat-source coupling simulation; a finite element model of the target structure is constructed; temperature stress analysis is performed on the plane in the target structure through the finite element model based on the environmental temperature value; based on the temperature stress analysis result, the plane of the target structure is divided into multiple blocks, expansion reinforcement belts are arranged between the blocks, and the concrete strength of the expansion reinforcement belts is higher than that in the blocks; steel bars are arranged in the plane; pouring is performed in the blocks through the skip method, and pouring is performed between the expansion reinforcement belts and the blocks through the alternate method. The scheme can realize the super-long underground structure without permanent joints, improve the integrity, waterproofness and use function, and through fine design and material coordination, the number of cracks in the construction period and the use period can be effectively controlled.

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