Inclined steel pile foundation pit supporting structure and construction method

Abstract

The invention discloses an inclined steel pile foundation pit supporting structure, which comprises a waterproof curtain and an inclined steel pile, wherein the waterproof curtain comprises stirring piles which are mutually lapped in the radial direction and anti-slide piles which are inserted into the stirring piles, and the top part of the anti-slid pile is over the upper side of the inclined steel pile; the side wall of the foundation pit is inclined to the outside, the inclined steel pile is inclined to the direction outside the foundation pit, the lower end part of the inclined steel pileextends downwards to the lower part of the underground structure, and the inclined steel pile does not pass through the underground structure. The invention also includes the construction steps of the structure: (1) construction of the waterproof curtain; (2) construction of the inclined steel piles; (3) excavation of earth in the foundation pit according to the layering, wherein the constructionof a hanging net gunite layer and bamboo rib soil nail is carried out during the excavation process. The structure of the inclined steel pile which does not pass through the underground structure facilitates the recovery of the inclined steel pile, so that the underground structure can be prevented from being bonded to the inclined steel pile, which causes the recovery difficulty of the inclinedsteel pile. The recoverable structural design of the inclined steel pile can reduce the construction cost.

Description

technical field [0001] The invention relates to an inclined steel pile foundation pit support structure and a construction method related to the support structure, and is a technical solution in the field of underground foundation pit support. Background technique [0002] At present, soft soil foundation pits generally adopt internal support structures, pile-anchor support structures, or oblique throw support structures, among which internal support structures are in the majority. The internal support is composed of horizontal support beams and vertical support columns. The main layout forms are ring, grid, opposite brace or corner brace, etc. The internal support structure has a large number of columns and horizontal support beams in the foundation pit, and the support system It needs to be removed later. And because of the hindering effect of the column, it is difficult to dig the earth, so that the construction period is longer, and the cost of building the structure ri...

AI Technical Summary

Problems solved by technology

In the support structure of diagonal bracing, the structural bottom plate is usually used as a reliable supporting force point, and the diagonal bracing is constructed when the structural bottom plate reaches the design strength, and it is difficult to excavate the earth under the diagonal bracing. Subsequent construction period caused a substantial delay

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