基于反分析方法的高填石路堤工期沉降计算

Determination of Settlement of High Rock-Filled Embankment in Construction by Back Analysis Method

利用邓肯—张EV非线性模型 ,采用有限元方法对高填石路堤工期沉降进行研究 ,并针对数值分析中计算参数取值困难 ,根据部分现场实测值 ,运用复合形法对参数进行优化 ,反演出适当的参数组合 ,再以反演参数值预测路堤施工期下阶段的沉降值。预测与实测结果比较表明 ,该反分析方法预测沉降误差较小 。

The settlement of high rock filled embankment in construction was studied with Duncan Chang E V nonlinear model and Finite Element Method (FEM) in this paper. As some desired parameters are usually hard to obtain for numerical computation, back analysis is adopted by using composite method on the basis of measured parameter values. Appropriate parameters combination derived from the present method were applied to predict the settlement of the embankment in next step construction. Comparison between the predicted settlement and the measured one show that, the proposed back analysis method bring is accurate to predict the settlement of high rock filled embankment in construction and could be safely applied in practice.