深基坑變形的神經網(wǎng)絡多步預測與控制研究——以潤揚長江公路懸索大橋北錨碇基坑工程為例.pdf

1、同濟大學博士后學位論文深基坑變形的神經網(wǎng)絡多步預測與控制研究——以潤揚長江公路懸索大橋北錨碇基坑工程為例姓名：趙其華申請學位級別：博士后專業(yè)：巖土工程指導教師：孫鈞20021201AbstractThesafetyofthe50metcrsdepthexcavationisthemainproblemintheconstructionprocessofthenorthanchorfoundationunderRun—YangBridge

2、aCTOS$￡heChan百iangRiverInthisarticle，宜0mrealtimemonitoringinformation，thesafetyanditsdisplacementtendencyofthepitwallandbracesystemwerestudieddeeplyforconstructionforecastThcmultisteppredictionskillbasedonartificialneura

3、lnetworkWasstudiedandsuccessfullyusedinthisprojectAndthesupportstructureSreliabilltyWasanalyzedbyfiniteelementmethodFromtheresearch，wecouldcometothefollowingknowledgeandconclusions：(1)ConstructionparameteriSthedeterminat

4、ivefactoraffectingtlledcformationofthecontinuouswallunderacertainsupportstructuresystem(2)Fromtimepoint，thefactors，whichaffecttheundergroundcontinuouswall’Sdeformationareseparatedastwoclasses：ParallelFactorswhichhasthech

5、aracterofsynchronousaction；SeriesFactors，whichaffectthedeformationinthefollowingtime(3)Thealarmlevelofthepitwall’Shorizontaldisplacementassumedtobe4‰depthoftheexcavationisrelat／velyrational11heWall，SdeformationveIocitysh

6、ouldbecontrollednoteXCeSS6mmperday(4)Theempiricalrelationshipbetweenthepitwallsaveragehorizontaldisplacement(supposedas6)andthedepthofexcavationratiotowallitself(supposedasa1iSasfollowing：6=001dh。(mm)Thisempiricalrelatio

7、ncouldbeappliedundertheconditionofQlessthanorequaltoO5insoftsoilarea(herehtiSexcavationdelathunitmm)(5)WhenthedepthofexcavationratiotothedepthofthewallⅡless05themaxlmurnhodzomaldisplacementsiteofthepitwallisbelowexcavati

8、onIevelWhendequalto05，themaximumhorizontaldisplacementSiteiSalwaysneartheexcavationlevelonthewallWhenogreat05，themaximumhorizontaldisplacementsiteisgenerallyupwardtheexcavationlevelAndwhenogreat07，themaximumhorizontaldis