Steel pipe pile assembly, foundation pit retaining structure and construction method of foundation pit retaining structure

Abstract

The invention provides a steel pipe pile assembly and a foundation pit retaining structure. The steel pipe pile assembly comprises at least two steel pipe piles arranged in parallel and lock hook pairs matched with the steel pipe piles, wherein two lock hooks in each lock hook pair are distributed in axial symmetry relative to the matched steel pipe piles; the lock hooks of the two adjacent steelpipe piles are bitten for sealing, so that the two steel pipe piles are integrally connected and the gap between the two steel pipe piles is sealed. Foundation pit retaining is implemented through theabove steel pipe pile assembly to form the integrated steel pipe pile enclosure system integrating soil retaining and permeability resistance properties based on the good properties of high strength,high stiffness and high stability of the steel pipe pile assembly. In the pile sinking process, the steel pipe piles have the advantages of thin-wall driving and not obvious soil compaction effect. Moreover, the construction procedures are simple, and the construction efficiency is high. The steel pipe piles can be connected through the lock hooks. There is no need to arrange a waterproof curtainon the outside of a pit. The construction noise and construction waste are reduced. The steel pipe pile, the foundation pit retaining structure and the construction method of the foundation pit retaining structure are consistent with green construction.

Description

technical field [0001] The invention relates to the technical field of enclosure system construction, in particular to a steel pipe pile assembly, a foundation pit enclosure structure, and a construction method for the foundation pit enclosure structure. Background technique [0002] At present, the design of deep foundation pit enclosure structure mostly adopts the traditional enclosure system. The main enclosure systems include the following two types: 1) Bored pile + water-stop curtain enclosure system. At the same time, there are quality hidden dangers such as hole expansion and pile position offset; 2) Steel pipe piles + water-stop curtain enclosure system, steel pipe piles have the advantages of thin-walled driving and no obvious soil squeezing effect, but in essence It still belongs to the separated pile row enclosure structure, and a water-stop curtain needs to be arranged outside the pit. [0003] Therefore, how to retain the advantages of the traditional enclosure...

AI Technical Summary

Problems solved by technology

[0002] At present, the design of deep foundation pit enclosure structure mostly adopts the traditional enclosure system. The main enclosure systems include the following two types: 1) Bored pile + water-stop curtain enclosure system. At the same time, there are quality hidden dangers such as hole expansion and pile position offset; 2) Steel pipe piles + water-stop curtain enclosure system, steel pipe piles have the advantages of thin-walled driving and no obvious soil squeezing effect, but in essence It still belongs to the separated pile enclosure structure, and a water-stop curtain needs to be arranged outside the pit

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