路基沉降对边坡稳定性影响的数值分析  

Numerical analysis of effect of subgrade settlement on slope stability

作　　者：吴定略[1] 刘鑫[2,3] 盛柯[2,4] 洪宝宁[2,4] 

机构地区：[1]广东省长大公路工程有限公司,广东广州511431 [2]河海大学岩土力学与堤坝工程教育部重点实验室,江苏南京210098 [3]河海大学隧道与地下工程研究所,江苏南京210098 [4]河海大学岩土工程科学研究所,江苏南京210098

出　　处：《南京理工大学学报》2015年第6期756-762,共7页Journal of Nanjing University of Science and Technology

基　　金：广东省交通运输厅科技项目(科技-2015-02-015;科技-2015-02-013)

摘　　要：通过数值模拟计算,分析了路基沉降对沿线边坡和线下边坡稳定性的影响。从路基沉降量和路基与边坡边界的距离等方面,进行了其对边坡稳定性影响的定量计算。基于影响因素分析,给出了稳定性安全系数随各因素数值增减的变化规律。借助敏感性分析方法,给出了容重、粘聚力、内摩擦角等土体参数、坡高、坡比等边坡几何形状参数以及沉降量、沉降叠加效应、路基与边坡距离等路基沉降参数对边坡稳定性影响的权重。The effects of subgrade settlement on the stability of slope along or under the subgrade are analyzed using numerical simulation. The effects of subgrade settlement and distance between subgrades to slope boundary on slope stability are calculated quantitatively. The change law of stability safety factors is obtained based on the analysis of various influence factors. The influence weight of soil body parameters of unit weight,cohesion,internal friction angle,slope geometry parameters of slope height,ratio of slope and subgrade settlement parameters of settlement value,settlement super-imposed effect,distance between subgrade and slope on slope stability are given using sensitivity analysis method.

关 键 词：路基沉降 边坡 稳定性 容重 粘聚力 内摩擦角 坡高 坡比 沉降量 沉降叠加效应 

分 类 号：TU470.3[建筑科学—结构工程]