黄土滑坡临滑预报的应变控制方法

我国西北部地区黄土沉积巨厚，地质构造复杂，土体强度低，水敏感性强，各种类型的黄土滑坡广泛分布。黄土滑坡具有滑动规模大、滑动速度快、灾害损失严重等特点。黄土滑坡滑动时间预报，特别是临滑预报在地质灾害防治领域具重要意义。根据黄土力学性质试验与典型黄土滑坡变形分析研究结果，在对比分析黄土剪切应变特性与滑坡滑动破坏机制的基础上，论文提出了一种黄土滑坡临滑预报的应变控制方法。建立了中、浅层与厚层黄土滑坡的应变破坏标准。经多处滑坡实例验证，结果基本合理，可应用于黄土滑坡临滑预报。

The method of forecast just before sliding for loess landslide

The depositing depth of loess is very large in the northwest China.Many kinds of landslides distribute there.The dimension of the loess landslide is huge and the hazards of it is catastrophic.The temporal,especially the just before sliding forecast of the loess landslides is very important in the field of geological hazard prevention and control.According to the results of mechanical tests of loess and research and analysis of typical loess landslide deformation,based on the comparation between loess shear strain and the failure mechanism of landslide movement,this article sets up strain controlling method of forecast just beofre sliding for loess landslide.The examining results of several loess landslides show that this method is reasonable.It can be used in the forecast just before sliding for loess landslide.