摘要
在有限元软件中进行二次开发实现了空间m法,并应用该程序对上海银行深基坑工程支护结构进行了计算。为解决m值取值经验性较大及m值难以确定的问题,本文结合前期工况实测资料运用非线性回归反分析方法进行了位移反分析,得出较合理的各层土的m值,并用该值对基坑开挖最终工况下的变形进行了分析预测。结果表明:应用空间m法结合位移反分析算法可以反映围护结构变形性状及开挖的空间效应,文中的计算结果与实测基本吻合。
3D m-method was implemented by using FEM software, and applied to analyze the retaining structures of Shanghai Bank Deep Excavation Project. To solve the difficulties in empirically choosing the value of ＂m＂, a nonlinear regression program was used to perform displacement inverse modeling, based on the monitoring data of early construction stages, in order to get reasonable values of ＂m＂ in different soil layers. The estimated parameters were used to forecast the lateral displacement of diaphragm walls during the final stage. Results show that the present method can properly reflect the deformation characteristics of retaining structures and 3D effect of deep excavation, and the simulated data shows good agreement with the monitoring data.
出处
《岩土工程学报》
EI
CAS
CSCD
北大核心
2006年第B11期1332-1335,共4页
Chinese Journal of Geotechnical Engineering
关键词
深基坑
M法
三维分析
反分析
deep excavation
m-method
3D analysis
inverse modeling
作者简介
王建华（1959-），男，上海交通大学博士生导师，从事岩土工程的教学和科研工作。
