考虑挡土墙墙体平移的墙后分层填土主动土压力分布  

Distribution of active earth pressure acting on retaining walls with soil placed in layers and considering the displacement of wall

作　　者：章瑞文 徐日庆[2] 郭印[2] 

机构地区：[1]浙江中联建设集团有限公司,浙江绍兴312000 [2]浙江大学建筑工程学院,浙江杭州310027

出　　处：《水利学报》2008年第2期250-255,共6页Journal of Hydraulic Engineering

摘　　要：在对挡土墙发生平移时墙后滑裂土体的应力状态进行分析的基础上,建立了作用于墙后滑裂体的墙面间作用力、滑裂面间作用力、土层间剪力以及土层竖向作用力之间的关系式。通过考虑墙后土体分层填筑时沿墙高墙体实际位移量的不同,对墙面摩擦角进行调整,建立了考虑水平土层间剪力作用、每一土层的滑裂面水平倾角和墙面摩擦角变化的土层竖向土压力的逐层渐近的计算方法,以及挡土墙主动土压力合力及其作用位置的计算公式。通过与模型试验结果和库仑解的比较表明:按分层填筑计算得到的挡土墙主动土压力分布与试验结果基本一致;主动土压力合力与库仑解接近;其作用位置较库仑解高,与试验结果相吻合。The stress state of collapsed soil behind the retaining wall in consideration of the displacement of wall is analyzed. The relationship among reaction force of wall, reaction force of collapse surface, shear forces between soil layers and vertical earth pressure due to gravity is established. The friction angle of the wall can be adjusted according to the height of the placed soil layer and the method for calculating the soil pressure from layer to layer is proposed. At the same time, the formulas for calculating the active earth pressure distribution and resultant force as well as the determination of resultant force position are also established. The application shows that the calculation results of earth pressure resultant including its magnitude and position are in good agreement with experimental data, but the acting position is higher than that calculated from Coulomb formula.

关 键 词：平移墙 应力状态 土压力分布 分层填筑 

分 类 号：TU431[建筑科学—岩土工程]