某偏压隧道洞口段滑坡整治技术

Landslide Treatment Technology at Portal Section of a Unsymmetrically Loaded Tunnel

某铁路山隧道受车站站位影响,隧道进口长距离处于浅埋偏压段,上覆土层厚,在强降雨及坡脚施工影响下引发滑坡,滑坡造成隧道衬砌纵向开裂,危及施工及运营安全,通过补充勘探、滑坡原因分析、滑坡整治方案比较,采用抗滑桩+大减载+反压回填取得了很好的整治效果。

Due to the influence of station location,the tunnel entrance of a railway mountain tunnel is in the shallow buried bias section for a long distance,and the overlying soil layer is thick,which causes landslide under the influence of heavy rainfall and slope toe construction.The longitudinal cracking of tunnel lining caused by landslide endangers the safety of construction and operation.Through supplementary exploration,landslide cause analysis and comparison of landslide treatment schemes,the method of anti slide pile+large load reduction+back pressure backfill is adopted,and good treatment effect is achieved.