多尺度有限单元法在围海造陆区工后地下水流模拟中的应用  

Application of multi-scale finite element method to simulation of post-construction groundwater flow in the reclamation area

作　　者：罗跃[1] 叶淑君[1] 吴吉春[1] 

机构地区：[1]南京大学水科学系,南京210093

出　　处：《工程勘察》2014年第8期35-38,48,共5页Geotechnical Investigation & Surveying

基　　金：国家自然科学基金(No.41272259);江苏省自然科学基金(No.BK2012730);岩溶动力学重点实验室开放课题(No.KDL2012-09)

摘　　要：大规模打设了塑料排水板的围海造陆区,是一种高度非均质场地,如果应用传统有限元法解这种非均质介质中的地下水流问题,由于单元不能跨越岩性界线,需要精细剖分才能获得较精确解。这样往往使计算时间长,甚至超出普通计算机能力。而多尺度有限元法是针对高度非均质介质中地下水流问题提出的一种解决办法,所以,笔者引入多尺度有限单元法探讨解决围海造陆区工后地下水流模拟。本文通过6个算例来揭示多尺度有限元在模拟此类场地时的可能误差及其适用范围。The reclaiming lands from the sea improved by drain consolidation method with prefabricated vertical drain （PVD） are always highly heterogeneous. If the traditional finite element method is applied to solve ground water flow problem in the reclaimed land with prefabricated vertical drains, finer grids are necessary in order to obtain accurate results, which may require long computing time or even exceed computing capacity of personal computer. Multi-scale finite element method （MsFEM） is a numerical method developed to solve ground water flow problems in highly heterogeneous porous media. MsFEM is introduced to solve ground water flow problem in reclaimed land with prefabricated vertical drains. Six numerical cases are presented to illustrate the possible discrepancy and the application scope of MsFEM.

关 键 词：围海造陆 塑料排水板 高度非均质 多尺度有限元 

分 类 号：P641.2[天文地球—地质矿产勘探]