Partial support method of concave ultra-deep foundation pit surrounded by heritage buildings on three sides

Abstract

The invention provides a concave ultra-deep foundation pit zoned supporting method for a three-side surrounded cultural protection building. The concave ultra-deep foundation pit zoned supporting method is a supporting construction method adopting concave or multi-external-corner shaped foundation pit design. A foundation pit is broken up into conventional geometrical shapes, such that a concave foundation pit is broken up into a rectangle and an L shape and is reasonably divided into two construction zones, and foundation construction is performed on the L-shaped zone after a newly-built building underground foundation structure soil body in the rectangular zone is stabilized. By means of a zoned construction mode and a supporting mode that slope protection piles are combined with steel supports and anchoring rod supports, the stress concentration phenomenon caused by crossing of anchor rods at concave positions is avoided, the foundation pit deformation is decreased to the greatest extent, and stability of a supporting system and surrounding cultural protection buildings is ensured. Compared with a traditional construction process, the concave ultra-deep foundation pit zoned supporting method has the advantages of being advanced technically, economical, reasonable, safe, reliable and environment-friendly and is suitable for foundation pit supporting construction with large foundation pit excavating area, foundation pits with concave planes, multi-external-corner foundation pits, large excavating depth, complicated surrounding environment and strict deformation requirement.

Description

technical field [0001] The invention relates to a foundation pit supporting method in building construction. Background technique [0002] In the field of construction, with the overall development planning of urban construction, buildings in the old urban areas, especially in cultural relics protection areas, pay more and more attention to the development and utilization of underground space, and the excavation depth of foundation pits is also increasing. , due to the impact of the surrounding cultural heritage buildings, roads, and municipal pipelines, the foundation pits in the old urban areas are mostly irregular polygons, and the foundation pit engineering has a strong spatial effect. The stability and deformation have a great influence. According to past experience, the external corners of the foundation pit are subject to complex forces and are prone to stress concentration and large deformation, which is the weak link in the foundation pit support. The three sides ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a three-sided support method for concave-shaped ultra-deep foundation pits surrounded by cultural heritage buildings, to solve the technical problem of concave-shaped foundation pit deformation; and to solve the problems of ensuring the safety of cultural heritage buildings and the stability of the foundation pit support system

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