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- Title
Numerical Investigation of Earth Berm Effects on Prefabricated Recyclable Supporting Structure in Circular Excavations.
- Authors
Chen, Lichao; Guo, Chengchao; Cao, Dingfeng
- Abstract
The prefabricated recyclable supporting structure (PRSS) is an innovative support system that integrates a steel skeleton with polymer waterproof technology. Earth berms are extensively adopted to support the PRSS, but there is limited understanding on the factors influencing their behavior in circular excavations. In this paper, a numerical model is first validated with a case history in Henan, China. Afterwards, the geometric parameters of the earth berms, including the height (H), the top width (B1), and the bottom width (B2), on the behavior of the PRSS, are investigated. It is shown that, by increasing the height, top width and bottom width of earth berms, the lateral deflections, and bending moments of supporting piles, as well as the ground surface settlements, tend to decrease. However, the reduction effect of these parameters diminishes as well. Moreover, the raised effective formation level considering the effect of the earth berms on stability and deformation analyses is discussed. The factor of the safety of the excavation is almost doubled when axisymmetric conditions are considered compared to plane strain conditions. In deformation analysis, the raised effective formation level increases with the height of the earth berms until a steady value is reached.
- Subjects
HENAN Sheng (China); STRAINS &; stresses (Mechanics); BENDING moment; EXCAVATION; SAFETY factor in engineering
- Publication
Applied Sciences (2076-3417), 2024, Vol 14, Issue 11, p4703
- ISSN
2076-3417
- Publication type
Article
- DOI
10.3390/app14114703