A new anchor-siphon drainage combined method used for slope stabilization  

作　　者：SUN Hong-yue WANG Xu YU Yang SHU Jun-wei WANG Tian-long LUO Rui CHU Zhao-wei 

机构地区：[1]Ocean College,Zhejiang University,Zhejiang Province,Zhoushan 316021,China [2]College of Civil Engineering and Architecture,Zhejiang University,Hangzhou 310058,China

出　　处：《Journal of Mountain Science》2023年第11期3295-3311,共17页山地科学学报（英文）

基　　金：the financial support of the National Natural Science Foundation of China(Key Project)(No.42230702);National Natural Science Foundation of China(No.42277129);Natural Science Foundation of Zhejiang Province(No.LY21D020001)。

摘　　要：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 anchorsiphon 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 560kPa,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.

关 键 词：LANDSLIDE Safety factor Optimized design Siphon drainage ANCHOR New structure 

分 类 号：TU472[建筑科学—结构工程]