高速公路路堑边坡稳定模拟分析及治理措施  

Stability Analysis and Reinforce Design of Highway Slope

作　　者：胡焕校[1] 刘静[2] 佘重九[2] 龚纪文[3] 

机构地区：[1]中南大学地学与环境工程学院,湖南长沙410083 [2]中南大学土木与建筑学院,湖南长沙410083 [3]中国科学院广州地球化学研究所,广东广州510640

出　　处：《中南大学学报（自然科学版）》2004年第5期856-859,共4页Journal of Central South University:Science and Technology

基　　金：中国科学院知识创新方向性项目(KZCX2 113)

摘　　要：基于极限平衡理论,针对湖南长沙机场高速公路沿线路堑边坡,分析了边坡的物质成分、结构构造、雨水渗透下岩土渗透性、抗剪强度以及裂隙等对边坡稳定性的影响,并采用快速拉格朗日法对该段边坡进行了数值模拟计算。研究结果表明:该边坡在构造上具有走向与公路轴线基本一致,倾向与坡面一致的特点,同时,上部强风化的泥质粉砂岩裂隙十分发育,岩石具有遇水软化的特征,在雨水的作用下,岩土的抗剪强度急剧降低,导致顺层滑坡;该路堑边坡的稳定性较低。通过对边坡采用锚固的治理措施,既能保持高速公路沿线整体性,又能达到加固的目的。Based on the theory of limit equilibrium, the paper analysises that the substance condition , structure, rainfall infiltration, mechanical properties and crack of rock and soil effect on the stability of highway slope. Taking Changsha highway slope for a instance, the rock strike of slope along with the highway and the trend, which is as the same as slope, the high developing crack and rainfall cause the rock formation slide. The safety is lowered by simulating and calculating the stability of the slope by FLAC (Fast Lagrangian Analysis of Continua) method. The results show that the reinforcement method is effective to take bolt anchorages.

关 键 词：边坡 稳定性 数值模拟 快速拉格朗日法 锚杆 加固 

分 类 号：TU14[建筑科学—建筑理论]