坡面形态对边坡稳定性影响的理论与试验研究

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Abstract The effect of slope topography on the stability is studied by statistical analysis，experimental tests and theoretical calculation. Firstly，a preliminary result that the stability of concave slope is better than that of convex slope is obtained based on the statistical analysis of 300 sets of failure slope data. Then，the ultimate stable angles of concave slope，convex slope and horizontal slope are researched by tilting the model box test. The results indicate that the ultimate stable angle of concave slope is higher than that of horizontal slope，and the convex slope′s ultimate stable angle is lower than the horizontal slope′s one. Thereafter，the force differences among convex slope，concave slope and horizontal slope are analyzed theoretically；and the phenomenon that the concave slope is more stable than the convex slope is explained. Finally，the safety factors of circular concave and convex slopes are derived employing rigorous limit equilibrium method. The influence factors and changing rules of slope topography effect are also analyzed. The safety factor curves of circular slopes with different curvatures are designed to facilitate engineering applications. Then，the ranges of considering slope topography effect are also suggested. The results provide some scientific references to accurately evaluate slope stability of diverse topography.

Key words： slope engineering slope topography model test limit equilibrium statistical analysis safety factor

Received: 16 January 2013

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https://rockmech.whrsm.ac.cn/EN/Y2014/V33/I1/35

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