全部

力学与实践 ›› 2013, Vol. 35 ›› Issue (6): 55-58,29.doi: 10.6052/1000-0879-13-036

• 应用研究 • 上一篇    下一篇

库伦主动土压力作用点高度确定方法的改进

王力威   

  1. 常州大学环境与安全工程学院, 江苏常州 213164
  • 收稿日期:2013-01-29 修回日期:2013-03-27 出版日期:2013-12-08 发布日期:2013-10-16
  • 通讯作者: 王力威,男,1963 年生,高级工程师,硕士,从事土木工程的教学和科研.E-mail:wlw9999@126.com E-mail:wlw9999@126.com

IMPROVEMENT OF THE METHOD OF DETERMINING THE HEIGHT OF ACTION POINT OF COULOMB ACTIVE EARTH PRESSURE

WANG Liwei   

  1. School of Environmental & Safety Engineering of Changzhou University, Jiangsu, Changzhou 213164, China
  • Received:2013-01-29 Revised:2013-03-27 Online:2013-12-08 Published:2013-10-16

摘要:

库伦主动土压力作用点位置高度确定为墙高的1/3 处,分析表明这一结论及其推求过程不尽合理.为解决此问题,针对墙后滑动土楔体的受力情况,根据三力汇交原理,考虑墙背土压力的分布与土楔体对其下稳定土体的压力分布的相关关系,采取几何推导方法,得出了主动土压力作用点位置高度表达式;进一步分析了作用点高度对影响因素的敏感性,结果表明其敏感性从大至小的排序为:墙背倾角、内摩擦角、外摩擦角、填土坡角.

关键词:

挡土墙|库伦主动土压力|作用点|敏感性分析|稳定性

Abstract:

The action point of the Coulomb active earth pressure used to be determined at the one-third place of the wall height, and the analysis in this paper shows that this practice is not reasonable. In order to solve this problem, considering the forces on the sliding soil wedge behind the wall, based on the balance of three converging forces, the relations between the earth pressure distribution of the wall back and the distribution of the soil wedge pressure on a stable soil behind, and the geometric relationship, the expression of the position of the action point of the active earth pressure is obtained; the sensitivity of the height of the action point to the impact factors is analyzed, which shows that the sensitivity sequence from big to small is the inclination of the wall back, the angle of the internal friction, the angle of the external friction, and the angle of the fill slope.

Key words:

earth retaining wall|Coulomb active earth pressure|action point|sensitivity analysis|stability

中图分类号: 

  • TU432