深基坑支护结构变形计算

通过现场量测的深基坑围护结构变形信息资料，结合参数优化反分析及弹性地基梁有限元计算，建立了深基坑开挖中支护结构变形计算的预报方法。在开挖过程中，利用变形监测信息，优化反分析得出土体和支护结构的力学参数，再利用这些参数预报支护结构在下一工况的变形。该方法可对深基坑开挖的安全性作出评估，指导工程施工。

PREDICTION OF RETAINING STRUCTURE DISPLACEMENT IN FOUNDATION PIT

An approach for predicting the displacement of the retaining structure of foundation pit is proposed based on in-situ data,optimum back analysis and elastic finite element method. With the monitoring information of displacement in the process of deep excavation,the optimum back analysis is used to calculate the properties of soils and retaining structure,which are then applied to predict the displacement of the retaining structure in the next stage. The back analysis is repeated in subsequent stages until the end of excavation. The results of back analysis provide guidance on design and construction of deep excavation and assessment on the security of excavation operation.