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- Title
A new anchor-siphon drainage combined method used for slope stabilization.
- Authors
Sun, Hong-yue; Wang, Xu; Yu, Yang; Shu, Jun-wei; Wang, Tian-long; Luo, Rui; Chu, Zhao-wei
- Abstract
A new anchor-siphon drainage combined method used for slope stabilization is proposed in this paper. It includes an anchoring section and a siphon drainage section. The novelty of the anchor-siphon drainage combined method is the realization of the drainage and anchoring in the one inclined borehole. The engineering cost of drilling and the resulting disturbance to the slope is reduced. To validate the feasibility of the proposed method, a numerical method that combines the pore water pressure distribution after siphon drainage and the anchoring force of the anchoring section is used to evaluate the safety of the slope with the anchor-siphon drainage method. The proposed method was illustrated and validated with the Hongpu Village landslide, in Tonglu County, Zhejiang Province, in China. Compared with the common anchor bar with the same length in the anchoring section, the factor of safety (FOS) for Hongpu Village slope with anchor-siphon drainage is increased by 0.085. The calculation method of the optimal length ratio between the drainage section and the anchoring section and its influencing factors were studied. For the different design parameters, there is always an optimal length ratio of the drainage section. Compared with the siphon drainage and full-length anchor bar with the same borehole length, the anchor-siphon drainage combined method shows better landslide prevention ability. Moreover, when the optimized parameters with a bond strength of 560 kPa, a borehole inclination of 35°, and no reduction in length are used, the calculated safety factor is 1.316, which is significantly higher than the FOS of 1.131 for the slope with siphon drainage.
- Subjects
ZHEJIANG Sheng (China); CHINA; DRAINAGE; PORE water pressure; SAFETY factor in engineering; WATER distribution; BOND strengths
- Publication
Journal of Mountain Science, 2023, Vol 20, Issue 11, p3295
- ISSN
1672-6316
- Publication type
Article
- DOI
10.1007/s11629-023-7969-x