Large-span underground space deep foundation pit support system and construction method

Abstract

The invention discloses a large-span underground space deep foundation pit support system. The large-span underground space deep foundation pit support system comprises a deep foundation pit, multiplesupport units are continuously arranged on the inner wall of the periphery in the deep foundation pit, an I-shaped steel plate pile is formed between two adjacent support units, each support unit comprises upper, lower, left and right prefabricated support parts which are in abut joint and spliced, the prefabricated support parts on the left and right ends are fixedly connected to the I-shaped steel plate piles through bolts, and a whole support wall is formed on the periphery inner wall of the deep foundation pit. Waterproof plain concrete is poured into gaps between the support units and afoundation on the inner wall of the excavated deep foundation pit. The four corners are each provided with one I-shaped steel plate pile. Through the prefabricated support parts, splicing combinationof the periphery of the deep foundation pit in the horizontal and vertical direction is carried out, a combined structure is formed by the deep foundation pit and the I-shaped steel plate piles, arrangement of a transverse support and an even wall of the large-span deep foundation pit can be reduced or removed, and the problem that in the prior art, the work face construction cannot be performed in a large-area manner is solved. The system has the advantages of being reasonable in structure, capable of greatly simplifying construction, low in cost, green, environment-friendly, capable of saving investment, safe, portable and the like.

Description

technical field [0001] The invention belongs to the technical field of deep foundation pit support in underground space, and in particular relates to a support system for deep foundation pit in large-span underground space which can be used as temporary or permanent support; the invention also relates to a support system for deep foundation pit in large-span underground space The construction method of the protection system. Background technique [0002] In recent years, with the high development of urban underground space in my country and the construction of a large number of high-rise buildings, along with a series of engineering technical problems and construction treatment measures such as large-span underground space and deep foundation pits that need to be solved urgently, many researchers continue to explore the convenience of construction, A new way to be safe and efficient. Looking forward to exploring a new technology and new technology of support structure that c...

AI Technical Summary

Problems solved by technology

However, setting internal supports in deep foundation pits will greatly reduce the construction space in the foundation pit, and large-scale construction equipment is difficult to construct in a large area, which increases the construction cost and cycle; and the measures of pile-anchor components are usually difficult to operate in a limited space due to the limitation of building red lines. scope of use

Bored cast-in-situ pile support has a long construction period, high cost, pollution to the environment and uneconomical factors.

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