Journal of South China University of Technology(Natural Science Edition) ›› 2012, Vol. 40 ›› Issue (9): 153-159.

• Architecture & Civil Engineering • Previous Articles     Next Articles

Analytical Method of Elasto-Plastic Subgrade Reaction for Single Pile Subjected to Lateral Soil Movement

Zhang Ai-jun1,2  Mo Hai-hong1 Zhu Zhen-de3   

  1. 1. School of Civil Engineering and Transportation,South China University of Technology,Guangzhou 510640,Guangdong,China; 2. Shenzhen Government Investment Project Evaluation Center,Shenzhen 518036,Guangdong,China; 3. Geotechnical Research Institute,Hohai University,Nanjing 210098,Jiangsu,China
  • Received:2011-11-19 Revised:2012-05-20 Online:2012-09-25 Published:2012-08-01
  • Contact: 张爱军(1977-) ，男，博士生，主要从事基坑支护、边坡加固研究． E-mail:zhangaijun@qq.com
  • About author:张爱军(1977-) ，男，博士生，主要从事基坑支护、边坡加固研究．
  • Supported by:

    国家自然科学基金资助项目( 50809023)

PDF

923

Abstract:

Large lateral soil movement usually occurs in many unstable slopes due to the excavation or rainfall,which results easily in additional displacement and bending moment in adjacent stabilizing piles. In order to solve this problem,based on the Winkler foundation beam model,the simplified elasto-plastic constitutive relation of the pilelateral soil is adopted to simulate the nonlinear pile-soil interaction,and a set of four-orders differential governing
equations based on the elasto-plastic subgrade reaction method are devised to describe the stabilizing pile-soil slope interaction. Then,the matrix expression of the analytical solutions of the pile response is deduced according to its continuity conditions on the sliding face and boundary conditions at the top and bottom of the pile. Finally,the analytical solutions obtained through the proposed method and the existing measured values in model tests are compared,thus verifying the reliability of the proposed analytical method.

Key words: pile-soil interaction, subgrade reaction method, Winkler foundation beam, elasto-plastic, analytical solution