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。%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 than that of slices method, and that the safety factor decreases 15% when considering expansion force. The new method can better reflect the effect of the drainage system, the influence of reinforcement, and the high strength characteristics of expansive soil under the condition without water.
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