紧邻基坑开挖的PHC桩侧向变形的预测

Lateral Deformation Prediction of PHC Pile Adjacent to Foundation Excavation

根据某基坑开挖期间的环境监测的实测数据,运用有限元正交数值试验、回归分析和优化相结合的方法反演了基坑软土的力学参数,研究表明了该方法合理有效;基于反分析的地层参数,预测了紧邻基坑开挖的PHC桩的被动侧向变形,结果表明计算值与实测值较接近。为今后类似工程的预测提供了参考。

The actual data of environmental monitoring during one foundation's excavation are applied to combining approach of the FEM orthogonal numerical test and the regression analysis and optimization to invert the soft soil parameters, which shows the approach acceptable. The soil parameters obtained by back-analysis are used to calculate the passive lateral deformation of PHC pile which is close to the foundation pit. The calculation results are approximate to the actual data. This case will be referred to the later similar projects.