考虑分布荷载作用的库仑土压力简化计算方法  

Simplified Algorithm of Coulomb's Earth Pressure with Consideration of Distributed Load

作　　者：李伯根 LI Bogen(China Railway Eryuan Engineering Group Co.,Ltd.,Chengdu 610031,China)

机构地区：[1]中铁二院工程集团有限责任公司,成都610031

出　　处：《路基工程》2024年第5期131-135,共5页Subgrade Engineering

摘　　要：采用库仑土压力理论进行挡土墙设计时,解析算法只能考虑地面形态相对规则的情况,数值算法遍历计算过程较为繁琐。提出一种考虑分布荷载情况的库仑土压力简化算法,将分布荷载等效为荷载土柱,同时将荷载土柱按破裂角倾斜,可将考虑荷载作用的库仑土压力计算简化为无荷载作用的库仑土压力,避免现有计算方式中需考虑多种破裂面与荷载相对位置关系的情况,计算过程更加简便;得到破裂角后,通过将滑动楔体按破裂角进行条分,可以得到土压力分布图形。经过与解析解对比,该简化方法计算结果准确,土压力分布形态与解析解吻合。When using Coulomb's earth pressure theory for retaining wall design,the analytical algorithm can only consider the relative regularity of ground morphology,and the numerical algorithm has a complicated traversal calculation process.A simplified coulomb's earth pressure algorithm considering the distribution load is proposed.The distributed load is equivalent to a loaded soil column.Meanwhile,tilting the loaded soil column at the angle of the failure angle,which can simplify the calculation of Coulomb's earth pressure with the effect of load into the calculation without the effect of load.This avoids the need to consider the multiple position relationships between failure surfaces and the load in the existing calculation method,making the calculation process more convenient.After obtaining the failure angle,the soil pressure distribution diagram can be obtained by dividing the sliding wedge according to the failure angle.By comparing with the analytical solution,the simplified method has accurate calculation results,and the soil pressure distribution shape matches the analytical solution.

关 键 词：库仑土压力 分布荷载 破裂角 倾斜土柱 简化算法 

分 类 号：U213.15[交通运输工程—道路与铁道工程]