重力式挡土墙列车荷载侧压力计算  

Calculation of Side Pressure on Gravity Retaining Wall under Train Load

作　　者：周坤 ZHOU Kun(China Railway Engineering Consulting Group Co.,Ltd.,Beijing 100055,China)

机构地区：[1]中铁工程设计咨询集团有限公司,北京100055

出　　处：《铁道标准设计》2018年第6期11-13,19,共4页Railway Standard Design

摘　　要：铁路目前主要采用库伦理论进行重力式挡土墙列车荷载侧压力计算。针对在极限状态设计法中采用库伦理论计算存在的问题,讨论库伦理论、朗肯理论、弹性理论三种方法按极限状态设计计算列车荷载侧压力的适用性,研究国内外规范中列车荷载侧压力的不同计算模型,对比30 t轴重C96列车荷载侧压力的理论计算、有限元模拟及现场实测结果,分析不同墙高库伦理论、弹性理论土压力计算结果的合理性,得出列车荷载侧压力合力作用于挡土墙中部不利于挡土墙抗倾覆稳定的结论,按现行规范荷载模型采用库伦理论不能充分反映这一不利后果,建议加大荷载分布宽度予以改进,推荐在极限状态设计法中采用弹性理论计算列车荷载侧压力。The Coulomb theory is mainly used as the calculation method of side pressure on gravity retaining wall under train load,but it remains some problem when used in the limit state design method.By discussing the applicability of the three theoretical calculation methods-the Coulomb theory,the Rankine theory and the Elastic theory,studying different calculation models of train load in domestic and foreign codes,comparing theoretical calculation results with FEA and field measurement,analyzing the reasonability of the results of Kulun theory and Elastic theory to different wall heights,it is concluded that the joint force of the train load on the middle of the retaining wall is adverse to the anti overturning stability of the retaining wall and the calculation method of Kulun theory used by the current standard load model can not fully reflect the adverse consequences,which could possibly be improved by enlarging the load distribution width,and the elastic theory in the limit state design method is recommended to calculate the side pressure of the train load.

关 键 词：重力式挡土墙 侧压力 库伦理论 弹性理论 极限状态设计法 

分 类 号：U213.1[交通运输工程—道路与铁道工程]