应变能密度在黄土滑坡临滑预报中的应用

Application of Strain-energy Consistency in Forecast of Sliding of Loess Landslide

为了运用应变能密度方法对黄土滑坡进行临滑预报,通过假定黄土为近似弹性体,以发生剪切破坏时的最大抗剪强度与临滑时最大应变的乘积作为最大应变能密度。同时以实际观测的位移-时间变量之间的关系,用回归法拟合出应变-时间关系的表达式,并得出应变能-时间的表达式。用应变能密度法对黄茨滑坡进行了临滑预报,并与滑坡的实际发生时间作了对比,两者非常接近。应用应变能密度法可对黄土滑坡进行较为准确的临滑预报。

Using the method of strain-energy consistency in order to forecast the loess landslide just before sliding,and by the loess can be looked as the elastomer approximatively,the product of the maximum shearing strength strain when the shearing damaged and the maximum strain just before sliding is taken as the maximum strain-energy consistency.At the same time the equations of relationship of strain-time and of strain energy-time are educed through the observational value of relations of displacement-time.The strain-energy consistency method is used to forecast the sliding of the Huangci landslide,to contrast with the actual time of causing the landslide.The two values are closely.Thus this method can use for the forecast just before sliding of the loess landslide.