A method for constructing post-cast expansion reinforcement strips for wall panels of underground structures

Abstract

The invention provides a method for building a post-pouring expansion reinforcing band of a wallboard of an underground structure. The method comprises the following steps: step one, according to the size of the wallboard, determining the form and the arrangement mode of the expansion reinforcing band; determining the kind and the dosage of an expanding agent; step two, manufacturing a concave fixed plate of a box type fixed structure; step three, determining the position of the post-pouring expansion reinforcing band, and arranging the box type fixed structure; step four, arranging prestressed steel bars; step five, tying the steel bars and prestressed steel bar embedded pipes; step six, pouring concrete; step seven, tensioning the prestressed steel bars and grouting the embedded pipes. The method overcomes the defects that the prior art does not define a method for determining the kind and dosage of the expanding agent, can not effectively isolate wallboard concrete from post-pouring expansion reinforcing band concrete, is difficult and complex in construction, cannot adapt to the high waterproof requirement and is limited in the application of the post-pouring expansion reinforcing band. The method realizes the design and construction of the waterproof crack-resisting structure of the underground structure and effectively prevents concrete from water seepage and cracking.

Description

technical field [0001] The invention relates to a design and construction method in the technical field of concrete structure engineering, in particular to a construction method for a post-cast expansion reinforcement belt of an underground structure wall panel. Background technique [0002] With the acceleration of urbanization in our country, a large number of underground space construction projects need to be carried out. As a part of urban space, the construction of underground structures such as underground railways, underground garages and underground commercial streets is crucial to urban development. The concrete outer walls of underground structures are in contact with groundwater for a long time, and undertake the function of preventing groundwater from invading the underground space. The conventional method adopts external waterproofing measures for wallboards to prevent the intrusion of groundwater, but external waterproofing measures are prone to failure of ext...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the defects in the prior art, the object of the present invention is to provide a method for constructing a post-cast expansion reinforcement belt for wall panels of underground structures. Wallboard concrete and post-poured expansion-reinforced strip concrete are difficult and complicated to construct, unable to adapt to high waterproof requirements, and the application of post-poured expansion-reinforced strips is limited. The design and construction of waterproof and crack-resistant structures for underground structures can effectively prevent Concrete seepage and cracking

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