摘要
自然界中土体强度随深度变化情况普遍存在。通过数值方法对2层黏性土坡的稳定性进行了模拟,重点分析了土体强度随深度变化以及土层厚度对土坡安全系数和失稳滑动面位置的影响。结果表明,与采用上下土层性质平均值的均质土坡相比,考虑土体强度随深度变化的土坡安全系数更小;此外,土层厚度对土坡滑动面的位置具有重要影响,当上层土层厚度小于坡高,随着土体强度系数k的增大,滑动面出口向坡脚移动,入口向坡肩移动。
The variation of soil strength with depth is common in nature.The stability of the two-layer cohesive soil slope was simulated by numerical methods.The influence of soil strength with depth and the thickness of the soil layer on the slope safety factor and the position of the unstable sliding surface were analyzed.The results show that,compared with a homogeneous soil slope that uses the average of the properties of the upper and lower soil layers,the safety factor of the soil slope considering the variation of soil strength with depth is smaller;in addition,the thickness of the soil layer has an important influence on the position of the sliding surface of the soil slope When the thickness of the upper soil layer is less than the height of the slope,as the strength coefficient k increases,the exit of the sliding surface moves towards the foot of the slope and the entrance moves towards the shoulder of the slope.
作者
王恒亮
WANG Heng-liang(Jiangning District Construction Project Quality Supervision Station of Nanjing,Nanjing Jiangsu 711100 China)
出处
《江苏建筑》
2020年第3期102-104,共3页
Jiangsu Construction
关键词
土坡
强度
安全系数
滑动面
soil slope
strength
safety factor
sliding surface