摘要
Abstract
In order to reduce the influence of shield tunnel construction on pile group foundation of adjacent bridge,numerical simulation is used to simulate and analyze the influence of tunnel excavation on horizontal displacement,tangential stress and axial stress of adjacent pile group foundation.The results show that with the increase of pile foundation depth,the horizontal displacement of each pile shows a trend of de-pression and increasing of horizontal depression,and the tangential stress shows a trend of decreasing in the forward direction and increasing in the reverse direction.The axial stress and vertical displacement of each pile are increasing.The closer the pile foundation is to the tunnel axis,the greater the horizontal displacement,vertical displacement,tangential stress and axial force of the pile foundation,and the more susceptible it is to tunnel excavation.The horizontal displacement,vertical displacement,tangential stress and axial force of pile foundation not penetrated by shield construction are smaller than that of pile foundation penetrated by shield construction,that is,the influence of shield construction on pile foundation is more significant.关键词
隧道工程/桥梁群桩/开挖深度/水平位移/切向应力/轴向应力Key words
Tunnel engineering/Bridge pile group/Excavation depth/Horizontal displacement/Tangential stress/Axial stress分类
交通工程
