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作 者:方鹏 陈文胜[1] 蒋茂林 戴嘉宁 FANG Peng;CHEN Wen-sheng;JIANG Mao-lin;DAI Jia-ning(School of Civil Engineering,Changsha University of Science&Technology,Changsha 410114,China)
出 处:《交通科学与工程》2021年第1期69-74,共6页Journal of Transport Science and Engineering
基 金:国家自然科学基金资助项目(51778067,51279018)。
摘 要:针对计算挡土墙土压力时,因挡土墙转角处与长直墙的土压力不同,其转角处需用圆弧形挡土墙的土压力进行单独计算的问题。本研究提出将圆弧形挡土墙作为整体进行土压力计算的方法,基于库仑土压力理论和极限平衡理论,计算了挡土墙墙后滑动土体的破裂角,并用微积分计算沿墙身对称线上土压力的合力。同时考虑了墙背与墙后填土之间的摩擦力。研究结果表明:圆弧形挡土墙主动土压力及破裂角会随着墙土摩擦角的增大而减小。该计算方法可为挡土墙实际工程压力计算提供借鉴。When calculating the earth pressure of the retaining wall,it is usually considered that the earth pressure at the nook of the retaining wall is different from that of the long straight wall.The earth pressure at the nook is calculated separately with the earth pressure of the circular retaining wall.This study proposes a method for calculating the earth pressure of the circular retaining wall as a whole.Based on the Coulomb earth pressure theory,the limit equilibrium theory is used to calculate the rupture angle of the sliding soil behind the retaining wall.Then calculus is used to calculate the resultant force of the earth pressure along the symmetry line of the wall,which can consider the friction between the wall back and the backfill at the same time.The results show that the active earth pressure and the rupture angle of the circular retaining wall decrease with the increase of the friction angle of the soil wall.This calculation method can provide a reference for the earth pressure calculation of the actual retaining wall engineering.
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