南水北调中线砂卵石基坑的渗流分析

Seepage of sandy gravel excavation in the Middle Route of South-to-North Water Transfer Project

为了对南水北调中线SG6标段的砂卵石基坑进行渗流分析,利用系统动力学方法,建立了SD相关模型,依据原基面砂卵石相对密度及含水率等相关实验数据,在Vensim PLE环境下进行了仿真模拟。得出了有限时间的施工降水不会导致大量地下水损失,在离渠道1 500m以外的地区已经小到可以忽略不计的结论,供施工单位和工程评价参考。

To study seepage of sandy gravel excavation in SG6 of the Middle Route in the South-to-North Water Transfer Project, the system dynamics method and set up SD pertinent model was proposed, by experiment data of relative density and water content in primary sandy gravel basal plane, simulation accomplished in Vensim PLE. The result showed that in consruction period, the water pumping has limited effected in underground water loss, at the area outside 1 500 m of the channel, the loss of underground water is negeigible. It is useful for further study and in practice use.