姑山矿采场滑坡成因与综合治理

The Formation Reason of Gushan Mine Stope Landslide and Its Treatment

姑山矿采场滑坡位于芜当联圩堤防55+300桩号处,滑坡沿着粉质壤土与砂壤土、细砂互层中的粘性土软弱结构面发生。滑坡主要原因为边坡过陡,且土体为易吸水软化的膨胀土,吸水后强度下降,滑坡反算证明主要土层的抗剪强度指标均小于实测值。滑坡治理采用了削坡减载、防渗排水、加筋土护坡等综合治理措施。

Gushan mine landslide is located at Wudang joint dike embankment with pile No. 55＋300. The landslide occurred along weak structural plane of the cohesive soil between the silty loam and the sandy loam. The main reason causing landslide is that the slope is too steep and the soil body easily becomes soften and inflated absorbing water and the sheafing strength of the inflated soil decline. The result of reverse calculation shows that the shear strength index of the main soil is smaller than the measured values. It is used to lower gradient to reduce load.prevent seepage and drainage reinforced soil Slope and so on in the treatment for landslide.