摘要
采用两阶段法得到地铁隧道开挖引起群桩的竖向位移和内力的解析解,第一阶段采用Loganathan和Polous提出的解析解估算土体的自由位移场,为使计算方便,采用多项式进行拟合;第二阶段依据文克尔地基模式,将自由土体位移施加于桩,首先建立被动土体位移作用下单桩竖向位移控制方程,利用常数变易法得到均质地基由于隧道开挖对单桩的竖向位移和内力的理论解析解;最后具体研究主要参数如:等效地层损失比、泊松比、桩基轴线离隧道轴线的水平距离、隧道的埋深、桩长、桩径、桩的轴向刚度因素变化对单桩的竖向受力特性的影响规律。
A two-stages analysis method for determining the pile effection induced by tunneling was uesd. In the first stage the Loganathan and Polous analytical Solution was used to estimate the free set- tlement of soil subjected to tunnel excavation, in the second stage,firstly the free settlement of soil was ap： plied to the single pile, secondly based on the Winkler model the settlement governing equilibrium equa- tion of the pile was set up, lastly the theory resolution of the single pile suffered from tunneling was ob- tained by means of the method of variation of constant applied to homogeneous foundation. In the end the influences of the equivalent ground loss,Poisson＇ s ratio,the distance between the tunnel and pile axis, the tunnel depth, the pile length, the pile diameter and the pile strength on the vertical behavior of the passive pile due to tunneling are analyzed.
作者
田晓艳
谷拴成
TIAN Xiaoyan GU Shuancheng(School of Architecture and Civil Engneering, Xi＇ an University of Science and Technology, Xi＇ an,Shanxi 710054, China Civil Engineering Department, School of Mechanical Engineering, Xi ＇ anShiyou University, Xi＇ an, Shanxi 710065, China)
出处
《公路工程》
北大核心
2017年第1期85-91,共7页
Highway Engineering
关键词
两阶段法
土体的自由位移场
常数变易法
影响规律
two-stages method
the free dispalcement of soil
variation of constant
influnce law
