浙江省浦江县海豹岭脚S20省道滑坡成因及其治理

浦江海豹岭脚滑坡位于改（扩）建20省道K37＋180-K37＋250段南侧山坡上,为一小型牵引式土质滑坡。文章介绍了该滑坡的结构及变形特征,分析了滑坡形成的主要影响因素及滑坡形成机理;根据岩土样品的试验结果,结合地区经验值及反算值,确定计算滑坡稳定性及剩余滑坡推力的抗剪强度参数,采用瑞典条分法对两种不同工况下滑坡体进行稳定性计算。计算结果表明：在天然状态下,滑坡体处于欠稳定状态;在持续降雨时,滑坡体处于不稳定状态。结合工程实际对滑坡进行了治理设计,提出抗滑支挡结合地表排水的综合治理措施。

Analysis and control on Haibaolingjiao Landslide in Pujiang County, Zhejiang Province

Haibaolingjiao Landslide in Pujiang County which locates in the south hill of the altered 20th provincial highway from 37K ＋ 180 to 37K ＋ 250 is a small retrogressive soil landslide. This paper describes the characteristics of structure and deformation of the landslide, and analyzes the causes of formation and the formation mechanism of landslide. According to the test data of rock and soil samples and the local experience data, the authors get the stability parameters of the landslide and the anti-shearing strength parameters. Then, the authors calculate the stability of the landslide under two working conditions adopting the Swedish slice method. The results show that the stability of landslide is insufficient while the landslide is at the unsteady states during raining continuously. Considering the nature of the engineering projects, the authors propose improving measures of supporting the landslide combined with the surface drainage in order to keep the landslide stable.