Construction method for dismounting concrete support of fabricated subway station

Abstract

The invention relates to the technical field of pile support system fabricated station construction, in particular to a construction method for dismounting a concrete support of a fabricated subway station. The method comprises the following steps that a plurality of fixing bottom plate blocks are hoisted in sequence, and the bottom plate blocks are tensioned and locked in the depth direction; base grouting, fertilizer tank backfilling and inverted arch backfilling are carried out; grouping is carried out according to a plurality of steel supports corresponding to the lower portion of a firstconcrete support, and the concrete supports and the steel supports are divided into a plurality of groups in the depth direction; and side wall blocks, middle plate blocks and top plate blocks are sequentially assembled in the groups in the depth advancing direction, temporary supports are additionally arranged in the construction advancing direction, and the steel supports and the concrete supports in the groups are dismounted. By means of the construction method, dismounting of the concrete supports is synchronously achieved in the foundation pit and roadway propelling construction process,the original concrete supports and the original steel supports can be dismounted step by step when the bottom plate blocks, the side wall blocks, the top plate blocks and the like are assembled, a dismounting process is simple in technology, the efficiency is higher, and the safety and reliability are achieved.

Description

technical field [0001] The invention relates to the technical field of pile support system station construction, in particular to a construction method for demolishing concrete supports of a prefabricated subway station. Background technique [0002] During the construction of the prefabricated subway station, the pre-support of the foundation pit and the roadway is completed through the excavation of the foundation pit and the roadway, followed by the hoisting of the bottom plate, base grouting, backfilling of the fertilizer tank, side wall assembly, middle plate assembly and roof plate For assembly and other construction, it is also necessary to remove the pre-support and set up long-term support. [0003] Pre-support usually includes many concrete supports and steel structure supports, and the concrete supports are set on the top (first row) of the foundation pit or roadway, and the steel structure supports are set on the middle (second row) and bottom (third row) of the ...

AI Technical Summary

Problems solved by technology

The existing demolition methods are time-consuming, laborious and inefficient, leading to long construction periods and low safety. This problem has always had a great impact on the construction of subway stations and has not been effectively resolved

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