Construction method of long and narrow deep foundation pit surrounding system

Abstract

The invention provides a construction method of a long and narrow deep foundation pit surrounding system. High-rigidity steel plate piles are adopted as surrounding piles, and are combined with four steel supports including a top ring beam to guarantee safety of a foundation pit; through adoption of such construction resources as recoverable steel plate piles and steel supports, the construction resources are saved, no curing requirement is generated, and the construction period is saved; and the construction time length of the foundation pit surrounding system is an important factor for guaranteeing safety of the foundation pit.

Description

technical field [0001] The invention relates to the technical field of foundation pit engineering construction, in particular to a construction method for a long and narrow deep foundation pit enclosure system. Background technique [0002] As underground space construction becomes more and more common, underground space construction technology is also developing rapidly, and the development and effective utilization of underground space has become a new construction trend. In the construction process of underground space, foundation pit construction is an indispensable part, and the construction of foundation pit enclosure system is an important part of foundation pit construction. The construction steps of the existing foundation pit enclosure system include the installation of enclosure piles, the construction of the top ring beam, the support construction, and the pouring of cushions. figure 1 It is a schematic diagram of the construction section of the construction met...

AI Technical Summary

Problems solved by technology

The construction steps of the existing foundation pit enclosure system include the installation of enclosure piles, the construction of top ring beams, the construction of supports, and the pouring of cushions. figure 1 It is a schematic diagram of the construction section of the construction method of the narrow and long foundation pit enclosure system in the prior art, as figure 1 As shown, for a deep foundation pit 1 with a depth of more than 10 meters, it is preferable to use SMW construction method piles 2' as enclosure piles, pour concrete around the top ring of the foundation pit 1 and add transverse steel supports 4 to form a reinforced concrete top ring beam 3. Two steel supports 4 are arranged at intervals along the depth direction of the foundation pit 1 under the top ring beam 3 to form a foundation pit enclosure system, but in this construction method, the SMW construction method pile 2' The cement mixing pile and the concrete of the top ring beam 3 require a long curing time. If a shallow pipeline is encountered, it cannot be avoided, and the pipeline must be removed before construction, and the cement mixing pile and top ring of the SMW construction method pile 2' The concrete and other resources of beam 3 cannot be recycled, which brings a lot of waste to the project progress and resources

Images