基于Delaunay构网的地层3D TEN模型及建模.pdf

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1、第24卷第24期岩石力学与工程学报Vol.24No.242005年12月ChineseJournalofRockMechanicsandEngineeringDec.2005基于Delaunay构网的地层3DTEN模型及建模123吴江斌朱合华(1.华东建筑设计研究院上海2000022.同济大学岩土工程重点实验室上海2000923.同济大学地下建筑与工程系上海200092)摘要构建真三维的地层模型是地质学三维GIS科学可视化及工程应用领域共同关心的课题在总结当前的三维地层建模理论与方法的基础上提出了地层的真三维四面体模型该模型将地层钻孔数据离散为点源性息采用Delaunay

2、四面体化算法构建三维地层并对地层尖灭断层等突变信息的处理进行了探讨最后给出了该方法在典型地层和工程应用中的实例该模型体现了TEN便于存储快速可视化等优点建模方法则充分利用计算机关键词数值分析Delaunay三角形四面体网络结构地层中图分类号O241TU44文献标识码A文章编号1000–6915(2005)24–4581–073DTENMODELOFSTRATAANDITSREALIZATIONBASEDONDELAUNAYTRIANGULATION123WUJiang-binZHUHe-hua(1.EastChinaArchitectureDesignInstituteS

3、hanghai200002China2.KeyLaboratoryofGeotechnicalEngineeringTongjiUniversityShanghai200092China3.DepartmentofGeotechnicalEngineeringTongjiUniversityShanghai200092China)AbstractThetruethree-dimensionalstratamodelingisacommonissueforgeologythree-dimensionalGISscientificvisualizationandenginee

4、ringapplication.Afterintroducingandsummarizingthetheoryandmethodofthree-dimensionalgeologymodelingatruethree-dimensionaltetrahedronnetwork(TEN)modelofstrataisproposed.Themodelrepresentsthree-dimensionalstratumwithaseriesoftetrahedronswhichcanprovidethebestflexibilitytofillregionsdefinedby

5、simplifiedboundaryelements(i.e.edgesintwo-dimensionaltriangleinthree-dimensional).Geologicalexplorationholeisthemaininformationforengineerstoknowthesoilstrata.Geologicalexplorationholeareabstractedasscatteredpointdata.Eachpointisthedemarcationpointbetweentwodifferentstrataandatopologicdim

6、idiatedatumstructureisdesigned.Basedonthesescatteredpointsabstractedfromgeologicalexplorationholeinformationthethree-dimensionalTENstratummodelisreconstructedbyDelaunaytriangulationalgorithm.Themodelingmethodcandisposalbrokenmutationsuchasfailureanddwindle.Atlastsomeassumedclassicstrataan

7、dstrataofapracticeprojectareconstructedbythemethod.Themodelhastheadvantageofconvenientforstoringandfastvisualization.Thecharacteristicofconstructionmethodistakingadvantageofcomputermoreeffectively.Becausethemodelstrataarerepresentedbytetrahedronthestratamodelcanalso