摘要
Abstract
The elastic foundation beam model is widely used for calculating displacement deformation responses of the adjacent pile foundations and other structures induced by tunnel excavation.However,the existing computational models are typically based on the assumption of homogeneous strata,and neglect the nonlinear distribution of soil stiffness in excavated zones.This study proposes an improved two-stage analysis method(TSAM).Compared with the existing Loganathan & Poulos(L&P)analytical solutions and field monitoring data,the improved TSAM achieves higher accuracy and more in line with actual engineering conditions,and the rationality and reliability are validated.The improved method is applied to investigate the influences of tunnel depth,pile-tunnel spacing,volume loss ratio,and pile diameter on the vertical displacement of piles induced by tunnel excavation.This research provides theoreti-cal support for displacement prediction and risk control of pile foundations adjacent to tunnels,particularly suitable for engineering assessments in deep burial and high-stress ground conditions.关键词
隧道开挖/桩基竖向位移/土体刚度硬化/两阶段分析法(TSAM)/地表沉降预测Key words
tunnel excavation/vertical displacement of the pile/soil stiffness hardening/two-stage analysis method(TSAM)/surface settlement prediction分类
建筑与水利
