膨胀土路堑柔性护坡整体稳定性计算方法-中南大学学报.pdf

第 46 卷第 10 期 中南大学学报( 自然科学版) Vol.46 No.10 2015 年 10 月 Journal of Central South University (Science and Technology) Oct. 2015 DOI: 10.11817/j.issn.1672-7207.2015.10.046 膨胀土路堑柔性护坡整体稳定性计算方法 1 1 2 滕珂 ，杨果林 ，易岳林 (1. 中南大学 土木工程学院，湖南 长沙，410075； 2. 安徽省交通控股集团有限公司，安徽 合肥，230000) 摘要：基于柔性护坡具有完善的防排水体系，能够减小雨水对膨胀土路堑边坡的影响，并防止裂隙发展，将膨胀 土坡划分成 3 个区域即裂隙区、非饱和区和饱和区，分别取不同的强度指标并加入膨胀力作用。采用积分法计算 安全系数。研究结果表明：采用积分法所得安全系数比采用传统条分法所得结果高 33% ；考虑膨胀力与不考虑膨 胀力相比安全系数减小 15%。该方法能更好地反映放排水系统和护坡体加筋的效果以及膨胀土在无水条件下高强 度的特性。 关键词：柔性支护；膨胀土；安全系数；稳定性计算 中图分类号：TU413.1 文献标志码：A 文章编号：1672−7207(2015)10−3907−07 Global stability analysis method of flexible cutting slope protection 1 1 2 TENG Ke , YANG Guolin , YI Yuelin (1. School of Civil Engineering, Central South University, Changsha 410075, China; 2. Anhui Transportation Holding Corporation Co. Ltd., Hefei 230000, China) Abstract: Considering that flexible support has perfect waterproof and drainage system, it can reduce the influence of rain on expansive soil, and prevent the crack development. Expansive soil slope was divided into three areas, i.e. fracture zone, unsaturated zone and saturated zone. Using different strength indexes, expansive force influence on slope stability was added. Integral method was used to calculate safety factor. The results show that the safety factor calculated by integral method is 33% higher tha