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库岸复杂滑坡体形成机制的数值分析

DOI: 10.13577/j.jnd.2015.0210, PP. 74-80

Keywords: 黄土坡滑坡,滑体结构,演化机制,数值模拟

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Abstract:

三峡库区黄土坡滑坡已历经了几十年的勘察,但对其复杂滑体结构的成因机制仍有待研究.论文从分析黄土坡滑坡体I号崩滑体的原岩结构特征及岩体风化泥化过程入手,通过数值模拟研究了斜坡发育过程中滑坡的演化机制.模拟结果表明,斜坡表层拉应力的分布及深部夹层剪应力的集中有利于岩体的风化泥化.数值分析结果较好地解析了黄土坡滑坡复杂滑体结构的形成机制,指出前缘断层发育与斜坡岩体深部夹层泥化是其形成演化的关键因数.数值分析也表明三峡水库蓄水对滑坡整体稳定性的影响较大,模拟结果还表明,潜在滑带由深部泥化夹层控制.

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