Skirt edge and strip drawing type rectangular foundation pit bottom soil body reinforcement design method

Abstract

Disclosed is a skirt edge and strip drawing type rectangular foundation pit bottom soil body reinforcement design method. When foundation pit bottom soil body is not reinforced, the embedded depth ofa support structure (1) and a passive area foundation pit soil body slip face (3) are found; according to the depth of the slip face, the soil body reinforcement depth and the skirt edge reinforcementwidth (7) are determined; the area, not subjected to skirt edge reinforcement, of the foundation pit bottom soil body is divided into an odd number of areas perpendicular to the long edge of a foundation pit; soil body reinforcement (8) is conducted on the areas with even numbers, and strip drawing reinforcement is formed; and foundation pit bottom soil body skirt edge reinforcement and strip drawing type reinforcement are combined, and reinforcement of the foundation pit bottom soil body is achieved. According to the skirt edge and strip drawing type rectangular foundation pit bottom soil body reinforcement design method, the effects of foundation pit bottom soil body skirt edge type reinforcement and strip drawing type reinforcement are fully considered and are combined, lateral displacement of an enclosing structure and foundation pit deformation, especially the swell of the foundation pit bottom, can be restrained effectively, a foundation pit bottom soil body reinforcement mode is designed reasonably, and thus the foundation fit is safer during excavation.

Description

technical field [0001] The invention relates to a soil reinforcement design method at the bottom of a skirt-drawn rectangular foundation pit, which belongs to the technical field of civil engineering construction. Background technique [0002] With the development of urbanization, the scale of underground space development is getting larger and larger, and the corresponding foundation pit support technology is constantly improving. In foundation pit engineering, no matter which type of support structure is used, it is necessary to ensure the stability of the support structure, reduce the deformation of the support structure, and prevent the bottom of the foundation pit from being too large. [0003] Practice has proved that reinforcing the soil at the bottom of the foundation pit is a feasible measure to reduce the uplift at the bottom of the foundation pit by improving the physical and mechanical indicators of the soil in the passive zone. The skirt reinforcement in the fo...

AI Technical Summary

Problems solved by technology

Drawn reinforcement is effective in suppressing the uplift of the pit bottom, but it has little effect on limiting the lateral displacement of the enclosure structure

Therefore, it is difficult to meet the control requirements of the overall deformation of the foundation pit simply by adopting a pit bottom reinforcement form.

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