强度折减有限元法模拟边坡牵引式破坏过程

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Abstract The retrogressive failure process of the slope，which has the characteristics of steps failing from slope toe towards slope crest，is simulated by several rounds of calculation in strength reduction finite element method (FEM). During simulation process，strength reduction factor is determined by dichotomy method for each calculation round. Weight of the locally failed soil is converted into slope surface load based on the static equilibrium assumption. The gradually becoming smaller reduction factor in the successive calculation rounds is adopted as the control criterion to determine whether it is a retrogressive landslide. Left abutment landslide of Jinjiang reservoir is taked as engineering example. The simulation results，which is basically in accordance with actual situations，prove that the simulation method is a feasible method.

Key words： numerical simulation retrogressive landslide strength reduction finite element method

Received: 12 May 2010

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http://www.rockmech.org/EN/Y2011/V30/IS2/3529

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