摘要
软土中隧道的纵向不均匀沉降是当前中外工程技术人员关心的热点,各种研究提出了引起不均匀沉降的多种原因。限于分析列车激扰对隧道纵向不均匀沉降的问题,用有限元方法对土与隧道系统的平面应变问题,进行了静动力学的数值分析,得到了系统的动力特性,比较了上海在建隧道现场实测的试验结果,比较了地铁列车的激扰频率,得出了动力学激扰引起的振陷是软土隧道沉降不容忽视的诱因。
Nowadays, the longitudinal asymmetric sedimentation of tunnel in soft soil is the hot topic which is concerned by technologists including both Chinese and foreigners, different causations that bring the asymmetric sedimentation have been raised. Limited to the analyses of the longitudinal asymmetric sedimentation of tunnel caused by train, by utilizing the way of finite element, it is the model of mechanics of plane strain issue of linear elastic soft soil and tunnel system that is analyzed and compared numerically by both statics and dynamics, then the dynamical character of system is gained, compared to the real dynamic result of the building tunnel collected by INV306 high - power digital collection and analysis system in Shanghai. The result shows that the oscillation - falling caused by dynamics interference is an inneglectable reason of the sedimentation of tunnel in soft soil.
出处
《建筑技术开发》
2008年第5期23-25,共3页
Building Technology Development
关键词
软土-隧道体系
纵向沉降
振陷
现场试验
数值分析
Soft soil - tunnel system
Longitudinal sedimentation
Oscillation - falling
Spot experiment
Numerical analysis
