临河岩石边坡抗滑稳定性分析  

Study on Anti-slide Stability of Rock Slope along River

作　　者：罗伟[1] 李亮[1] 赵炼恒[1] 程盼[1] 陈嘉祺[1] 

机构地区：[1]中南大学土木工程学院,湖南长沙410075

出　　处：《公路交通科技》2013年第8期23-28,42,共7页Journal of Highway and Transportation Research and Development

基　　金：国家自然科学基金项目(51078359;51208522);中国博士后科学基金项目(20110491269;2012T50708);贵州省交通运输厅科技计划项目(2012122033);湖南省科学技术厅科技计划项目(2012SK3231);中南大学研究生自主探索创新项目(2013zzts048)

摘　　要：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。Based on the assumption of improved distribution of groundwater pressure under slope body, using the limit equilibrium theory, the factor expressions for anti-slide stability of rock slope along river under the condition of different influencing factors, such as slope-top load, seismic load, anchorage load, river pressure on slope surface, groundwater pressure and toe erosion effect, are derived. The relation curves of the anti-shide stability factor with the influencing factors a drawn. The results show that （1） the new assumption which improved the water pressure distribution is reasonable; （2） water pressure is an important influencing factor to the slope anti-slide stability, the higher river water level and the lower groundwater level are beneficial to improve the slope anti-slide stability; （3） whether the outflow joint is blocked has significant effect on the slope stability against sliding, the outflow joint blocking has adverse effect on anti -slide stability of the rock slope along the river in general case, the anti -slide stability factor as the outflow joint blocked is larger than that as the outflow joint unblocked only when Hr 〉 Hw.

关 键 词：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 

分 类 号：U416.14[交通运输工程—道路与铁道工程]