Optimum analysis of super deep circular foundation pit enclosure structure

Abstract

Abstract: Aiming at the design problem of an ultra-deep circular enclosure structure in Foshan City, a numerical simulation combined with field measurements is employed to analyze in light of the geological characteristics. The thickness and embedded depth of the retaining structure were optimized and analyzed, and the variation of the stability of the foundation pit with changes in the thickness and embedded depth of the retaining structure under the same conditions was discussed. The results showed that the excavation face was deep into the rock. The circular foundation pit has good self-stability. From an economic point of view, the enclosure structure should not be embedded in deep rock. Furthermore, it is demonstrated that a relatively thin ground connecting wall, with shallow embedment, can meet safety requirements with considerable safety margins when placed on a sufficiently rigid foundation. These findings offer valuable insights for relevant engineering projects.

Key words: ultra-deep circular foundation pit, enclosure structure, deformation, stability

CLC Number:

TU94

ZHAO Yi-xing, ZHAN Gang-yi, LI Min, LIANG Xin-huan CHEN Zhao-yang, SHI Yu-feng. Optimum analysis of super deep circular foundation pit enclosure structure[J]. Journal of Lanzhou University of Technology, 2024, 50(4): 129-134.

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