排水固结法加固滨海软土地基的比选应用分析

Decision Analysis on the soft ground improvement by drainage method

以福州江阴港铁路大型货场的软基处理项目为背景,在同一场地上采用排水板超载预压、砂桩超载预压和真空联合堆载预压三种方法对滨海相软土地基进行小范围的试验性施工,比较了三种排水固结方法的工期、成本与工后沉降。同时利用专家问卷调查法,构建了决策者对工期目标、成本目标和工后沉降目标的效用函数。然后利用效用值并合理论,对大型铁路货场后续场地的分段施工方案进行了比选,认为前11段采用排水板超载预压,后3段采用真空联合堆载预压的分段施工方案为最佳方案。

Three drainage consolidation methods （by drainage pile, by sand pile and by vacuum loading） are applied respectively for the reclamation project of Fuzhou Jiangyin railway freight yard. And the period, the cost and the post--settlement for each drainage consolidation method are compared. Meanwhile, utility functions for the three decision objectives （i. e. period, cost and post--settlement） are structured through expert ques- tionnaire survey. Then an optimal construction plan for the following large scale area is selected by utility combination method.