摘要
针对上海虹源盛世国际文化城超大深基坑开挖扰动位移的时效特性,通过建立适用于基坑复杂结构体系的3D FEM模型和符合工程区域软土流变特性的地层蠕变模型,采用基于开挖卸载过程3D有限元方法与时间增量蠕变位移计算方法相结合,有效解决流变软土地层基坑开挖卸载位移与蠕变位移相互耦合条件下工程扰动区域土体长时位移计算问题。预测计算方法在依托工程中成功应用,为土体长时位移、长时稳定性预测以及工程施工方案的优化提供技术借鉴。
Aiming at the aging characteristics of super large and deep foundation pit excavation disturbance of Shanghai Hongyuan Shengshi international cultural city,3D FEM model for foundation pit complex structure system,and creep model in according with rheological characteristics of soft soil engineering area stratum,are built.Long displacement calculation under the condition of regional disturbed soil engineering is effectively solved,by combination of calculation method of 3D finite element method based on the excavation unloading process and incremental creep displacement.The prediction calculation method is applied successfully in the support engineering,which provides technical reference for long time displacement,long time stability prediction and optimization of engineering construction scheme.
出处
《中国市政工程》
2017年第2期61-65,共5页
China Municipal Engineering
关键词
流变地层基坑工程
FEM与蟠变模型相结合
长时位移预测
时间增量法
工程应用
rheological foundation pit engineering
FEM combined with creep model
long time displacement prediction
time increment method
engineering application
