摘要
通过运用水平条分法思想结合极限平衡理论能够确定挡土墙后主动土压力且比其他理论计算更简便。水平条分法研究墙体倾角、单元条块间的相互作用力、滑裂面处的应力关系等多种因素,通过多个方程相互迭代求解,不仅能计算出挡土墙后土体的主动土压力及其随挡墙高度分布的变化情况,还能计算土体滑裂面角度。计算表明:主动土压力随着挡墙高度变化呈现非线性分布的规律;同时,墙后土体滑裂面角度随着土体强度(c、φ值)的增加而呈线性增大趋势,与Rankine理论规律一致。通过算例,水平条分法与Rankine、Das方法比较结果存在偏差,但与Coulomb方法计算的结果几乎一致,更适用于无黏性土。
Horizontal slice method combining with limit equilibrium theory was used to calculate the active earth pressure on retaining wall, it was more convenient than other theoretical calculations. The inclina- tion angle of retaining wall, interaction force between two soil slices and stress relationship in failure wedge were considered. When several equations were solved by mutual iterative, active earth pressure on retaining wall, its varied distribution by the height of retaining wall, and the failure wedge angle of slipping soil body could be calculated by iterative resolution of several equations. Results showed that the variation of active earth pressure by the height of wall presented non-linear distribution and the angle of failure wedge increased linearly with the increase of soil strength, thus it matched the law of Rankine theory. The calculating example showed that the result by horizontal slice method had a little deviation compared with that of Rankine and Das methods, but the result by Coulomb method was more suitable for calculating non-cohesive soil.
出处
《南京工业大学学报（自然科学版）》
CAS
北大核心
2013年第6期69-73,共5页
Journal of Nanjing Tech University(Natural Science Edition)
关键词
水平条分法
主动土压力
滑裂面角度
极限平衡理论
无黏性土
horizontal slice method
active earth pressure
failure wedge angle
limit equilibrium theory
non-cohesive soil
