全断面基坑变形计算方法研究

Study on Deformation Calculation Method of Full Section Foundation Pit

复杂基坑的变形计算易受建模方式和参数取值的影响.本文探讨了一种以基坑整个断面为分析对象的全断面基坑变形计算方法,利用现场变形监测数据,反演分析出与实际工况相吻合的土层参数,将反演所得参数代入全断面模型,即可计算出相应工况下基坑的变形,并对下一工况的变形进行预测.实例计算结果表明,全断面基坑变形计算方法的计算结果与实测位移比较吻合,可为基坑开挖提供重要指导.

The calculation results of complex foundation pit are liable to be affected by modeling method and soil parameters. This paper discussed a deformation calculation method based on the full section of founda- tion pit. The soil parameters correspond with actual conditions can be calculated through back analysis based on the measured deformation monitoring data. After substituting the parameters into full section model, the deforma- tion of foundation pit in corresponding case can be calculated, and the deformation in next case also can be pre- dicted. The results of an example show that the calculated results of full section method were very close to the measured data, which can provide important guidance for the foundation pit excavation.