復雜巨厚第四紀松散沉積層深基坑降水三維非穩(wěn)定流數(shù)值模擬

1、河海大學碩士學位論文復雜巨厚第四紀松散沉積層深基坑降水三維非穩(wěn)定流數(shù)值模擬姓名：武永霞申請學位級別：碩士專業(yè)：地質(zhì)工程指導教師：駱祖江20060601Abstract111icka11dincompactquatcImarysediInentsiIlYang暾RiverdeltacreateacofnplexaqllifersystcmBecause也ehorizontalnowb刪eramundthedeepfoundationpit

2、isd湎clllttopenetmtei“comcbo訛moftheaquifer，deepfbluldationpitdewateringllsuallyusespaniallypcne仃atingⅥ忙llsandthisresultsinverycomplexchangesingr01mdwaterseepage謝Ⅱlobviouscharac衄isticof山ree—dimensionalnowAna】ysismetlloda11

3、dtwo—dimensionalmodelhavenotcontemedsimlllationandpredictiondemondofdeepfounda廿onpitanymoreAimingatdeepfoundationpitdewateringincomplicatedq硼temaryloosesedimentswitll目eattllickrless，血ree—dimensionaln眥e“calsimuIationmeori

4、esofde印foundationpitdewateringhasbeendiscussed柚dadeepresearchhasbeendonebyusingfIniteeIementmetIlod‘RemoVemwaIldcolumn’and‘putabign砌ber’havebeenusedforthefirstbolllldary；acominuousRegionalIdent訊cationFunctionisusedontheb

5、asisofnon—vaTiantnodalvirtualnuxmethodfbrthefeesurfhcebollndary；GaussfbnIluIaisusedtomakettlecurvedsllrfaceintegmlofthe舭esu怕cebouIldary仃ansfbHnedasthedi恐rencebe柳eenVoIumnintegral肌dothercuⅣedsurfaceimegraltocalculatethein

6、te黟alitemonboundaries，whichavoid訪gfindingtheposmonoffkesurf她e，w11ilethecontinuousRegionalIdentificationFunctionisappliedtocalculatev01umninte目alandsⅢfaceinte伊al；Crouta11dPCGmethodisusedfbrsolusionThenthree—dimensionaltra

7、nsientcon矗nedanduncon丘nedseepageanalysisprocedureisdevelopedneprocedureis印pliedin鉚oprojects：(1)shan曲aiHuanqiufin姐cecentertowerfoIlndationpitdewatering，thecomplicatednowstateof伊。吼dwaterissiIlllllatedundertheseconditionswh

8、ichⅡleaquifersdepositeIayerbylayer，t11ebottomoftbeaqllifcrsgoesdeepto149m，mehorizontalnowba塒ergoesde印to34m，theex訂actionwellsarepene廿atedto55m，Ⅱlefiltersoftheextmctionwellsarelocaledbet、veen34mto55m，andmewaterleVelinthede

9、epfbundationpitisdecreasedto26munderlandsllrface，theresuhof8pumpingwellsoptimizationprojectisdesigned(2)ThefonhsubwayofDongJiadutuIlllelr印airfo硼dationpitdewateringinShanghai，thecomplicatednowStateofgroundwaterissimuIated

10、undertheseconditionswhichtheaquifersdeposite1ayerbylayer，thebottomoftheaquifersgoesdeepto14445m，t11ehorizontalnowbarriergoesde印to65m，theexmlctionwellsarepene訂afedto60m，mefinersoftheextractionwellsareIocatedbetween45mto60