基于特征的数字城市地下空间建模技术研究与应用

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1、申请同济大学丁学博卜学位论文基于特征的数字城市地下空间建模技术研究与应用(“国家科技部、上海市科委部市合作世博科技专项基{；；=”)(项目编号：科技部2()(15BAg()SB()6．上海市科委05dz05806)(“教育部第四届高校青年教授奖励计划项目”资助)培养单位：土木工程学院一级学科：土木工程二级学科：结构工程研究生：琚娟指导教师：朱合华教授二OO七年二月目录ABSTRACTGreatdisadvantagesappearedinGeotechnicalEngineeringresultintheinvi

2、sibilityofthesubsurfaceenvironment,whichisnowbecomingvisiblewiththetoolsofdigitalization．Digitalizationisbecominganefficientmethodtosolvecertainproblemsinurbanundergroundspaceandgeotechnicalengineering．Amongvarioustechniquesofdigitalundergroundspaceandenginee

3、ringscience(DUSES)，modelingisabsolutelythemostimportant0110．Therearestillsomegreatchallengesextrudinginthedi仿cultiesofDUSESmodeling：modelingthehorizonwitharbitraryboundariesinsoRclay,thecomplicatedundergroundstructuresandmodelingtheobjectsinacertainprojectinl

4、ifeAongterm．Aftercomparedwiththetraditionalmethodsofhorizonmodelingandadvancedgeometricmodelingmethods，feature-basedmodelingtechniqueischosentobeappliedinthefieldofDUSES，andtheobjectivesofthisworkareasfollows：1．InChapter2．todeal研tllmodelingonhorizoninterfacew

5、itharbitraryboundary,3degreeBsplinetrendIBlrfaceisadoptedtofitboreholedatapointsondifferenthorizonsatfirst．Secondly,wimthehelpoftopologyexistinginthe4vertexesoftheirregular鲥dunit，thenip—outpointsareinterpolated．Atlast,thehorizoninterfaceswitllarbitraryboundar

6、iesaremadebyaddingboundariestotrendsurfacewiththemethodofB—Rap．Furthermore,interfaceupdateinlocalregionisrealizedbymakingfulluseofthecharacteristicofloealizedmodification．2．InChapter3，feature-basedmodelingforDUSESisputforwardtomodelingcomplicatedundergroundco

7、nstructionsandarchitectsefficiently．Firstly,thedefinitionandcategoryoffeaturesforDUSESageanalyzed．Secondly,theconceptmodel，modelingmethodandprocedurethistechniquearepresentedthoroughly．Inaddition,temporalandspatialdataorganizationandmodelrapresentafionofobjec

8、tsinundergroundspaceareachievedwimthemodelofbasestateamendments．3．InChapter4．twoprogramprototypesystemshavebeenworkedoutwimtheprincipleoffeaturebasedmodelingtechniquesforDUSES．AndinChapte