反分析方法在软土地区建设人工岛的应用

基于Abaqus软件提出反分析法,利用实测的沉降数据和准确的加载信息反分析得出土体参数,用于指导人工岛的建设.在取得试验土性指标的基础上,用Abaqus计算曲线与实测沉降曲线进行比较.在施工前采用实验室测得的土体参数,利用Abaqus预测土体的沉降和孔隙水压力.根据实测数据来修正计算的土体参数的准确性.采用反分析后的土体参数预测下一个施工阶段土体的位移和孔隙水压力,重复进行此过程,直至施工完成.结合模拟计算结果与监测数据分析,进行反分析和动态设计,有效指导了该人工岛的顺利建成.

Application of back feed analysis method to construct artificial island on soft foundation

A back feed analysis method was proposed based on the software Abaqus in order to safely construct the artificial island by using measured settlement data and accurate loading information. The Abaqus calculated settlement curves were constantly fitted with the measured settlement curves based on the soil parameters. The settlement and the pore water were calculated by using Abaqus with the parameters obtained from field investigation and laboratory tests before construction. Then the measured data was used to check the accuracy of the soil parameters for calculation. The displacement and the pore water pressure were estimated at the next step with the modified parameters. This procedure was repeated until the construction was accomplished. The back feed analysis and the dynamic design were constructed by combining the simulation results with the monitoring analysis, which effectively guided the successful completion of the artificial island.