崩塌堆积体的渐性破坏及稳定性分析

The progressive failure and stability analysis for avalanche deposit slope

崩塌堆积体是我国西南高山峡谷区常见的不良地质体,该类边坡的失稳破坏呈现渐进性破坏特征,由于传统的边坡稳定性计算的条分法无法反映它的破坏过程和机理,也无法确定其长期稳定性,因此,分析崩塌堆积体稳定性影响因素的基础上,采用FLAC内嵌fish程序语言对崩塌堆积体边坡的渐进性破坏过程进行仿真模拟分析,其中,数值模拟时考虑了崩塌堆积体边坡物料抗剪强度的非线性等堆积特点对其稳定性的影响.通过FLAC数值模拟仿真分析,清晰地揭示了崩塌堆积体边坡渐进破坏的演化过程,证实了崩塌堆积体边坡的稳定性随时间推移逐渐降低的趋势.

Avalanche deposit slope is not a rare sight in southwest of our country.The failure of avalanche deposit slope is progressive.Traditional limit equilibrium method can not be used to simulate and analyze the process and mechanism of the slope progressive failure;and the judgment for long-term stability of slope is also not accurate.For these reasons,based on the discussion of the influence factors,the progressive failure process of avalanche deposit slope is simulated and the stability of slope is analyzed with FLAC code.The numerical analysis of an example shows that the simulation of the progressive failure of slope and the judgment for slope stability by FLAC code proves to be feasible.