Irregular foundation pit support and construction method

Abstract

The invention discloses an irregular foundation pit support and a construction method; the irregular foundation pit support is characterized in that: an inner support adopts a way that a girt is supported on an arched beam, the arched beam is arranged in the irregular foundation pit, and a cross beam is arranged in the arched beam to enhance lateral rigidity. When the arched beam is less than 15m,four anchored piles are arranged below the arched beam; when the arched beam is more than or equal to 15m, eight anchored piles are arranged below the arched beam. And the anchored piles are uniformly distributed by surrounding the arched beam. The anchored pile and a foundation pit support pile are expansion-head bored piles, the girt is arranged on the bored piles, and the girt is connected with the arched beam by a preload stress steel pipe. Two to three rows of inner supports are adopted, when two rows of the inner supports are adopted, a first row is arranged at the top part of a soldierpile, a second row is arranged in the middle part of the soldier pile and a third row is arranged at the position of 2 / 3 the middle part of the soldier pile. The irregular foundation pit support hassimple structure, clear stress route, low lost of engineering construction and convenient construction; in addition, the supporting structure has small deformation, and has less effect on the surrounding buildings.

Description

technical field [0001] The invention relates to the construction field, in particular to irregular foundation pit support and construction methods. Background technique [0002] The plane shape of deep foundation pit engineering has a great influence on the stability and deformation of the foundation pit. For irregular deep foundation pit engineering, the stress situation is relatively complicated. If the foundation pit support is improper, stress concentration often occurs and the foundation pit support will be damaged. protection system. In particular, for irregular deep foundation pit projects with large spans, inconsistent spans cause uneven stress, and foundation pits are prone to accidents. Contents of the invention [0003] The object of the present invention is to provide a support and construction method for irregular foundation pits. By using the characteristics that the arched beams are under a large pressure and do not generate outward pushing force, the setti...

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide a support and construction method for irregular foundation pits. By using the characteristics that the arched beams are under a large pressure and do not generate outward pushing force, the setting of the arched beams in the irregular foundation pits can greatly reduce the The span of the support in the foundation pit is defined, and the problem of unclear force transmission of irregular beams is solved, thus achieving the effect of safety and economy

Anchor piles are evenly spaced around the arched beam

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