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由于受到黄土地区地形地貌条件的制约,高填方路堤已成为主要的路基形式,其填土高度甚至高达50m以上,路堤稳定性一直是人们普遍关注的问题。通过建立高填方路堤数值模型,采用强度折减法对土体抗剪强度参数进行模拟,研究了不同条件下路堤边坡的安全系数及潜在滑动面的变化规律。结果表明:随着土体抗剪强度参数的增大,路堤边坡安全系数逐渐增大,边坡滑动面向深层发展,其曲率变缓;随着路堤顶部交通荷载的增大,边坡安全系数逐渐降低。
Due to the restriction of topography and geomorphology in the loess area, the embankment with high filling has become the main roadbed form, and the embankment height is even higher than 50m. The stability of embankment has been a common concern. The numerical model of high embankment embankment is established and the strength reduction method is used to simulate the shear strength parameters of soils. The safety factor of embankment slope and the variation rule of potential sliding surface under different conditions are studied. The results show that with the increase of the shear strength of soil, the safety factor of embankment slope gradually increases and the slope sliding surface develops in depth and the curvature becomes slow. With the increase of traffic load on the top of embankment, the safety factor of slope Gradually decreases.