高密度电法在高填方边坡垮塌后原因分析中的应用

Application of high-density electrical method in the analysis of the cause of the collapse of the high-fill slope

高填方边坡在复杂的地形以及自然条件下极易出现变形、滑移、开裂等影响其安全稳定的情况,对工业生产以及人民生命财产安全造成巨大隐患,甚至造成重大损失。这里主要以贵州一混凝土公司作为堆积废料的高填方边坡滑坡导致数人死亡的事故为对象,利用高密度电法,同时结合钻探、现场试验、室内试验以及建模计算等手段分析研究了其发生垮塌的原因,取得了比较好的成果并分析出了其垮塌原因,为防范以及研究此类滑坡提供一定的指导作用。

High-fill slopes are prone to deformation,slippage,and cracking under complex terrain and natural conditions that affect their safety and stability,and causes huge hidden dangers to industrial production and the safety of people's lives and properties.This article mainly focuses on the accident of several deaths caused by a landslide on a high-fill slope where a concrete company in Guizhou accumulated waste.We use high-density electrical method based on analyses and researches by combining drilling,field test,indoor test and modeling calculation to investigate the type of landslide that is a traction landslide caused by the backfilled soil slope sliding along the inner sliding surface of the fill.The landslide body and its affiliates are mainly type A coarse-grained backfill soil,and the slope body has not been effectively treated when it is backfilled.The accumulation slope rate is close to the natural angle of repose,and the slope body is in a critically stable state.The middle and lower parts of the front edge of the landslide body are type B fine-grained backfills distributed in a lenticular shape.The mechanical properties of the B-type landslide are worse than those of the A-type,resulting in instability and failure of the front slope.The geophysical prospecting results are in good agreement with the drilling results.Through these works,certain guidance is provided for the prevention and research of such landslides.