ISSN 2096-4498
CN 44-1745/U
Tunnel Construction ›› 2023, Vol. 43 ›› Issue (S2): 513-522.DOI: 10.3973/j.issn.2096-4498.2023.S2.056
Previous Articles Next Articles
LIU Rui, FANG Chengcheng, CHU Zhumin, LI Meng
Online:
Published:
Abstract: For deep and large pits composed of different shapes, the excavation sequence significantly influences the deformation of the foundation pit and its supporting structures. To minimize the impact of different excavation sequences on construction stability and determine the optimal sequence, numerical simulations are conducted using finite element software based on the Fuzhou Metro Foochow Arsenal Station excavation project. Circular and rectangular sections are considered, and various excavation sequences are simulated. The following conclusions are drawn: (1) For smallspan pits, excavating the rectangular section first and then the circular section results in larger surface settlements compared to excavating the circular section first, whereas for circular and largespan pits, excavating the rectangular section first and then the circular section is more favorable. (2) Excavating the rectangular section first and then the circular section leads to smaller maximum horizontal displacements of the sidewalls compared to the reverse sequence. (3) For the circular section, cut and cover excavation is superior to open cut excavation, and preserving the core soil during excavation is the optimal method. In summary, excavating the rectangular section first and then the circular section, with the circular section excavated using cut and cover excavation while preserving the core soil, represents the optimal approach.
LIU Rui, FANG Chengcheng, CHU Zhumin, LI Meng. Optimisation of Zoned Excavation Sequence of Deep and Large Foundation Pit in Urban Metro Station[J]. Tunnel Construction, 2023, 43(S2): 513-522.
0 / / Recommend
Add to citation manager EndNote|Ris|BibTeX
URL: http://www.suidaojs.com/EN/10.3973/j.issn.2096-4498.2023.S2.056
http://www.suidaojs.com/EN/Y2023/V43/IS2/513