Inclined pile foundation pit supporting structure and construction method thereof

Abstract

The invention discloses an inclined pile foundation pit supporting structure and a construction method thereof. The foundation pit supporting structure is characterized by comprising supporting pilesinclined relative to a foundation pit and retaining piles outside the foundation pit, wherein the supporting piles are obliquely arranged in soil at the bottom of the foundation pit at an angle of 10-20 DEG; one ends of the supporting piles are obliquely arranged on the retaining piles outside the pit and are connected to crown beams on tops of the retaining piles; and the side slope outside the foundation pit is strengthened by adopting concrete spraying. The construction method concretely comprises the steps of forming holes through a drilling machine, constructing the supporting piles and the retaining piles, arranging the crown beams and the like. Compared with the prior art, the structure disclosed by the invention has the advantages that no support or anchor cable exists in the foundation pit and good working space is provided for the excavation of the foundation pit and the construction of a basement structure, so that the engineering cost is reduced while the construction efficiency is increased at the same time; and the structure is simple and good in supporting effect and is particularly suitable for the construction of foundation pit support engineering with complex surrounding environment, multiple existing buildings and excavation sidelines close to red lines.

Description

technical field [0001] The invention relates to the technical field of foundation pit enclosure, in particular to an inclined pile foundation pit support structure and a construction method thereof. Background technique [0002] At present, internal support structures, pile-anchor support structures, or inclined pile-wall support structures are generally used for foundation pits with large excavation depths, among which internal support structures are in the majority. The inner support is composed of horizontal support beams and vertical support columns, and its main layout forms are ring, grid, opposite brace or corner brace, etc. The inner support support structure has a large number of columns and horizontal support beams in the foundation pit, which affects the earthwork. Excavation, the work efficiency of the excavator is low, thus prolonging the use time of the foundation pit and the total construction period, and it is easy to cause damage to the columns or supporting...

AI Technical Summary

Problems solved by technology

[0003] The deep foundation pit supporting structure of the prior art requires a large number of supporting structures in the foundation pit, so that the space in the foundation pit is occupied a lot, the working space is small, and the earthwork excavation of the excavator is affected, the work efficiency is low, and it is easy to touch the inclined pile The wall will affect the safety of the foundation pit, and the anchor cables of the pile-anchor support structure are generally more than 30m, which basically extend out of the red line of electricity and cannot be used. narrow

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