某铁路膨胀土路堑滑坡整治方案研究

Study on Remediation Scheme of Expansive Soil Cutting Landslide of a Railway

以某铁路区间膨胀土路堑滑坡整治工程为依托,在综合勘探的基础上,对滑坡产生的原因、发展、形成机理及整治措施进行分析。结果表明:不当的施工工序、坡体长时间暴露、强降雨是诱发该膨胀性岩土路堑滑坡的主要原因;滑面参数试验值不一定能反映现场实际情况,建议滑坡推力检算采用反算值或经验值;抗滑支挡设计应结合现场滑坡实际情况选用,机械成桩,可有效降低现场施工人员安全风险。

Relying on the treatment project of expansive soil cutting landslide in a railway section,on the basis of comprehensive exploration,the landslide of the causes,development,formation mechanism and treatment measures are analyzed.The results show that improper construction procedures,long-time exposure of slope and heavy rainfall are the main reasons for the landslide of the expansive cutting landslide;the test value of sliding surface parameters may not reflect the actual situation of the site.It is recommended to use the reverse calculation value or empirical value for the check and calculation of landslide thrust;the design of anti-slide support shall be selected in combination with the actual situation of on-site landslide,and mechanical pile forming can effectively reduce the safety risk of on-site construction personnel.