某高速公路厚层堆积体滑坡处治研究

Study on the Treatment of Landslide of Thick Accumulation Body on an Expressway

针对某高速公路边坡厚层堆积体滑坡处治工程,根据补充勘察、室内土工试验、现状滑面参数反算分析等方法确定处治设计参数,通过稳定性计算及剩余下滑力计算分析,采用“抗滑桩+Φ108mm钢管桩+深层排水孔”的综合支挡及排水方案,并进行地表位移监控量测。经处治后边坡天然及暴雨工况下稳定性分析安全系数满足规范要求,现场防护工程实施完毕后地表位移处于基本稳定状态。

In a landslide treatment engineering of the thick accumulation body,the treatment design parameters are determined by inverse analysis of sliding surface parameters obtained in supplement survey and laboratory soil tests.Through the stability calculation and residual sliding force calculation analysis,the comprehensive retaining and drainage scheme of"anti-slide pile+Φ108 mm steel pipe pile+deep drainage hole"is adopted,and the surface displacement monitoring and measurement is carried out.After treatment,the safety factors in slope stability analysis under normal and rainstorm conditions meet the standard requirements,and the surface displacement is generally stable after the completion of site protection engineering.