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基于非对称破坏模式的临坡地基承载力上限极限分析方法

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Keywords: 道路工程,临坡地基,上限极限分析,极限承载能力,条形基础,非对称性破坏模式

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Abstract:

?为了研究临坡条形基础地基的承载能力,在现有相关研究基础上,结合临坡条形基础地基工程的特点,通过深入分析其破坏机理,引进滑移线场理论与方法,构建出考虑临坡条形基础地基破坏非对称性特点的单侧滑移破坏模式;在此研究基础上,依据上限极限分析理论,通过构建出机动允许的速度场,导出了临坡条形基础地基极限承载力计算公式,引进序列二次规划优化算法,建立了临坡条形基础地基极限承载能力确定方法;并与现有研究成果进行了对比分析。结果表明:该方法合理、可行,不仅可以反映基础底面与地基土摩擦效应和基础与坡顶距离对临坡条形基础承载能力的影响,还可以反映临坡条形基础地基非对称性破坏特征的影响,较现有研究成果具有明显的优越性。

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