Construction method for prefabricated building enclosure of deep foundation pit in low-temperature environment construction

Abstract

The invention relates to the construction of building enclosures of deep foundation pits, in particular to construction method for a prefabricated building enclosure of a deep foundation pit in low-temperature environment construction. The construction method comprises the following steps of: prefabricating pile sections of enclosure piles, finishing boring pile positions according to design requirements, hoisting and placing the enclosure pile sections section by section and connecting the sections into integers in field to compose prefabricated enclosure pile retaining walls; and excavating the foundation pit, and finishing constructing transversely-supported internal structures among the prefabricated enclosure pile retaining walls so as to compose the prefabricated building enclosure of the deep foundation pit. The construction method provided by the invention has the advantages that: the building enclosure of the foundation pit is made of factory prefabricated members, the in-situ binding of reinforcing steel bar and pouring and curing of concrete under subzero temperature conditions can be avoided, so that the measure cost for winter construction is saved, the working environment is improved, the work efficiency is enhanced, the site construction period is shortened, and meanwhile, the quality of poured concrete of the building enclosure can be ensured.

Description

[0001] Technical field [0002] The invention relates to the construction of an enclosure structure for a deep foundation pit, in particular to a construction method for a deep foundation pit prefabricated enclosure structure for construction in a low-temperature environment. Background technique [0003] In the prior art, the types of enclosure structures and construction methods commonly used for deep foundation pits are mainly as follows: [0004] 1. For the underground continuous wall, use special trenching equipment to dig a deep trench under the mud protection wall, then hoist the steel cage and pour concrete to form a concrete wall underground. The advantages of the underground continuous wall as a retaining structure are: the wall has high rigidity, good integrity, small deformation, water-retaining and anti-seepage effect, no precipitation outside the pit, and small impact on the surrounding environment. The disadvantages are: mud wall protection is required during constru...

AI Technical Summary

Problems solved by technology

The disadvantages are: mud wall protection is required during construction, and the mud treatment is complicated; a large site is required, which has a certain impact on the environment; and the cost of the underground diaphragm wall is relatively high

The project cost is high, the construction speed is slow, and the construction quality is relatively poor

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