土工基础

›› 2011, Vol. 25 ›› Issue (6): 60-.

• 工程实录 • 上一篇    下一篇

刚性挡墙前土台被动土压力模型试验研究

司马军1,2， 吕 果1， 胡建伟1   

  1. （1.武汉大学土木建筑工程学院， 武汉 430072； 2.武汉大学水利水电学院，武汉 430072）
  • 收稿日期:2011-05-11 出版日期:2011-12-20 发布日期:2012-01-15
  • 作者简介:司马军，男，1972年生，博士，副教授，主要从事土力学和基础工程的教学与研究。

Model Studies of the Passive Earth Pressures Developed at Earth Berms Against Rigid Retaining Walls

SI  MA  Jun1,2, L  Guo1 , HU Jian  wei1   

  1. (1. School of Civil Engineering，Wuhan University， Wuhan 430072; 
     2. School of Water Conservancy and Hydropower Engineering， Wuhan University， Wuhan 430072, China)
  • Received:2011-05-11 Online:2011-12-20 Published:2012-01-15

摘要： 通过模型试验，采用风干砂土实测了绕墙底转动（RBT）位移模式下刚性挡墙土台被动土压力的大小，研究了土台土压力的分布规律以及土台宽度对土压力的影响。与Daly M. P.和Powrie W.（2001）提出的多层楔体试算法结果对比表明：土压力实测值接近于计算值，合力作用点高于计算值，在工程中按多层楔体试算法计算砂土台被动土压力是偏于安全的。

关键词: 被动土压力, 预留土台, 刚性挡墙, 模型试验

Abstract: Passive earth pressures in earth berms against rigid retaining walls in dry sands are modeled in this paper. The passive earth pressures are developed by rotating the retaining wall about a point below the wall base. The earth pressure distributions and the effect of the earth berm width on the magnitude of the earth pressures are studied. The measured earth pressures are compared with the predicted values based on the Multiple Coulomb Wedge Method proposed by Daly M. P. and Powrie W. (2001). It is suggested that the measured passive earth pressures are close to the predicted values and the points of resultant forces are higher than those of the predicted values. Therefore, the Multiple Coulomb Wedge Method can be safely used to predict passive earth pressures on sandy soils in practical applications.