不同地质条件下顺层岩质滑坡发生机制研究

地震不仅能诱发大型顺层岩质滑坡,也可形成潜在的顺层岩质滑坡灾害点。为探讨实际防治过程中不同发生机制条件下顺层岩质滑坡特点,通过对唐家山滑坡、新磨村滑坡进行影响因素和启动过程分析。结果显示:唐家山滑坡的地质-力学模型为滑动-拉裂-剪断,"锁固段"位于滑床上部。"6·24"新磨村滑坡滑源区的发生机制是滑移-剪断,"锁固段"位于滑床下部。边坡结构对顺层岩质滑坡的启动具有重要地位。滑坡机制的准确认识对于顺层滑坡防治具有十分突出的意义,并且不同类型的顺层岩质滑坡应采用不同的防治方案。

Earthquakes can not only induce large-scale bedding rock landslides,but also form potential disaster points of bedding rock landslides.In order to explore the characteristics of bedding rock landslides under different occurrence mechanisms in the actual prevention and control process,the influencing factors and start-up process of Tangjiashan landslide and Xinmocun landslide were analyzed.The results show that the geological-mechanical model of Tangjiashan landslide is sliding-tension-shearing,and the"locking section"is located in the upper part of the sliding bed.The occurrence mechanism of"6.24"Xinmocun landslide source area is slip-shear,and the"locking section"is located in the lower part of the sliding bed.Slope structure plays an important role in the start-up of bedding rock landslide.The accurate understanding of landslide mechanism is of great significance for the prevention and control of bedding landslides,and different prevention schemes should be adopted for different types of bedding rock landslides.