节理化岩质边坡随机结构面有限元和离散元耦合计算方法研究

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Abstract According to the joint distributing character of jointed rock slope，a numerical method of combined distinct element method/finite element method(DEM/FEM) for stochastic structural plane is presented based on continuum-discontinuum element method(CDEM). Compared with the elastic results of FEM，the method is indicated to be credible. Assuming all the points on the potential sliding surface are in the critical failure status simultaneously，there is almost no difference between the value of safety factor calculated by the method and limit equilibrium method(LEM)，which proves stress result of the method is credible once again. And it is also concluded that LEM shows the mean stress state，while the method aims to simulate the progress failure of slope. The slope may become instable caused by progressive failure which is concluded to be stable by LEM when the method is used without hypothesis of LEM. Wulong landslide is simulated and the consistent phenomenon with the real failure progress is got. The failure progress of the Wulong landslide shows that the development of cracks inside the slope is very important to analyse the stability of slope. Tracking and analyzing the failure progress of important slopes are helpful in taking proper supporting measures in advance to avoid disasters.

Key words： slope engineering jointed rock slope stochastic structural plane progressive failure combined distinct element method/finite element method(DEM/FEM) continuum-discontinuum element method(CDEM) Wulong landslide

Received: 09 January 2012

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https://rockmech.whrsm.ac.cn/EN/Y2014/V33/Isl/3114

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