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以云南施梦公路特高路堤边坡为研究对象,充分考虑滇西红层软岩的工程特性,通过建立FLAC有限差分计算模型,研究不同降雨强度和降雨持时对滇西红层软岩特高路堤边坡稳定性的影响及其形变规律。结果表明:边坡的安全系数随着降雨的持续有所降低,且降雨强度越强,边坡稳定的安全系数降低越多;随着降雨强度增大和降雨持时的增长,滑动面沿坡面浅层发展,由坡中向坡脚发展,边坡稳定安全系数有所降低,且其降低幅度有所增加。其成果将为滇西红层软岩特高路堤边坡防护设计提供依据。
Taking the project of the high embankment slope of Shi-Meng Highway in Yunnan Province as the research object, the engineering characteristics of the red-bedded soft rock in western Yunnan are fully considered. Through the establishment of FLAC finite difference model, the effects of different rainfall intensities and rainfall duration on the red- Influence and Deformation Law of High Embankment Slope Stability. The results show that the safety factor of slope decreases with the continuous rainfall and the stronger the rainfall intensity is, the more the slope safety factor decreases. With the increase of rainfall intensity and the increase of rainfall holding time, the sliding surface along the slope Shallow development, from the slope to the slope foot development, slope stability and safety factor has decreased, and its decrease has increased. The results will provide the basis for the protection design of the red bed soft rock embankment slope in western Yunnan.