岩土力学2017，Vol.38Issue(4)：1075-1081,7.DOI:10.16285/j.rsm.2017.04.019
基于Mindlin解分析隧道开挖对近邻桩基的影响
Influence of tunneling on neighboring piles based on Mindlin solution
周锦强 1王树英 2阳军生 1傅金阳1
作者信息
- 1. 中南大学 土木工程学院,湖南 长沙 410075
- 2. 中铁二院昆明勘察设计研究院有限责任公司,云南 昆明 650200
- 折叠
摘要
Abstract
Predicting the internal forces and deformation of the adjacent pile is significantly important for the impacts of tunnel excavation.The traditional elastic foundation beam method ignores the plastic deformation of pile-soil interface and its interaction,resulting error between actual results and predicted values.Based on Mindlin solution,we assume the interface is perfectly elastic-plastic for the pile-soil interactions,and derive the maximum shear stress and lateral soil pressure according to Mohr Coulomb criterion.From the constitutive equations,we derive the plastic solutions considering internal force and deformation of the pile due to tunneling.The validity of this new method can be verified by comparing the plastic solutions and the centrifugal test results.By accounting the plastic deformation in pile-soil interface,additional deformation by proposed procedure is greater than that by traditional foundation beam methods.Finally,the effects on the internal forces and deformation of adjacent pile are analyzed.Results show that large deviation of internal force and deformation in pile occurs in case where plastic deformation of pile-soil interface being ignored,and this deviation increases with the increase of ground loss rate.关键词
隧道/桩基/Mindlin解/桩-土界面Key words
tunnel/pile/Mindlin solution/pile-soil interface分类
建筑与水利引用本文复制引用
周锦强,王树英,阳军生,傅金阳..基于Mindlin解分析隧道开挖对近邻桩基的影响[J].岩土力学,2017,38(4):1075-1081,7.
