基于强度折减的加筋软土路堤边坡稳定分析.pdf

施工技术 2010年2月 70 CONSTRUCTION TECHNOLOGY 第39卷第2期 基于强度折减的加筋软土路堤边坡稳定分析 蔡晓光，范丽远，谢长旺，王根龙 (防灾科技学院防灾工程系，河北三河065201) [摘要]现行的加筋路堤稳定分析方法无法真实反映土工织物垫层对软土路堤稳定性的贡献，使计算的安全系数 提高很少.利用基于强度折减的边坡稳定分析方法，模拟筋材与土体的相互作用，可分析加筋软土路堤的边坡稳 定性.建议取边坡无量纲位移突变时刻对应的强度折减系数作为安全系数.经过三茂铁路路堤验算，计算的安全 系数与传统加筋路堤稳定分析方法相比大幅提高，并与实测结果较为符合.最后，利用本文给出方法计算复合加 筋排水褥垫加固路堤的稳定性. [关键词]堤坝；土工织物；边坡稳定分析；强度折减法；复合加筋排水舞垫 [中图分类号]TU43 [文献标识码]A[文章编号]1002-8498(2010)02-0070-04 Slope Stability Analysis Method Based on Strength Reduction for Reinforced Embankment on Soft Clay Deposit Cai Xiaoguang Fan Liyuan Xie Changwang Wang Genlong Department of Disaster Presention Engineering Institute of Disaster Presvention Science and Technology Sanhe Hebei 065201 China) Abstract:The contribution of reinforced cushion to the stability of embankment can not be considered in current analysis method.A slope stability analysis method based on strength reduction for reinforeed embankment is proposed.The strength reduction multiplier corresponding to that critical time step was suggested as safety factor of the slope.The results of an engineering example indicated that the proposed method in more reasonable and more close to true fact.The stability of embankment improved by bined drainage and reinforcement cushion is analyzed by the proposed method. Key words:embankment;geotextile;slope stability analysis;strength reduction method;bined drainage and reinforcement cushion 土工织物加固软基目前已在我国得到广泛应用，使边坡刚好达到临界破坏状态时，对土的剪切强度进 并取得了显著效果.然而采用现行的设计方法（瑞典行折减的程度.通过逐步减小抗剪强度指标...