基于FLAC2D的膨胀土边坡稳定性影响因素分析

在工程建设领域出现的膨胀土滑坡问题越来越多，准确地了解膨胀土土体各项参数对其稳定性有何影响显得尤为重要。以宿州至扬州高速公路天长段膨胀土边坡实例为计算模型，利用正交试验探讨了边坡土体天然密度、粘聚力、内摩擦角、弹性模量和泊松比对其稳定性的影响，发现对边坡稳定影响大小的顺序依次为:粘聚力、内摩擦角、天然密度、泊松比和弹性模量。

Analysis on Factors Affecting Expansive Soil Slope Stability Based on FLAC2D

Expansive soil landslide arises more frequently in the field of engineering construction so mat understanding how expansive soil parameters affect the slope stability correctly is particularly important. Taking an expansive soil slope along Tianehang Section of Suzhou-Yangzhou Highway as an example for calculation, this paper, by use of orthogonal test, discusses the influences of natural density, cohesion, internal friction angle, elastic modulus and Poisson ratio of the soil mass thereof on the slope stability and then finds out that sequence of the affecting consequence on the stability is： cohesion, internal friction angle, natural density, Poisson ratio and elastic modulus.