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临河岩石边坡抗滑稳定性分析

Keywords: 道路工程,稳定性分析,极限平衡法,岩石边坡,安全系数,水压分布,影响因素

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Abstract:

基于改进后的坡体地下水压分布假设,采用极限平衡理论,推导了坡顶荷载、地震荷载、锚固荷载、临坡河流水压、坡体地下水压和坡趾淘蚀作用下临河岩石边坡滑移稳定系数的表达式,绘制了滑移稳定系数与各个影响因素之间的关系图。分析表明改进后的水压分布假设是合理的水的作用是影响边坡抗滑稳定性的重要因素,临河水位升高、地下水位降低对提高边坡抗滑稳定性有积极作用滑面出流缝堵塞与否对边坡抗滑稳定性的影响较为显著,一般情况下,出流缝堵塞对临河岩石边坡抗滑稳定性不利,只有当Hr>Hw时,出流缝堵塞时边坡滑移系数才大于未堵塞时边坡滑移稳定系数。

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