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1、西安建筑科技大學(xué)碩士學(xué)位論文深基坑圍護(hù)開挖與軟土非線性流變研究姓名：劉二栓申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：巖土工程指導(dǎo)教師：韓曉雷;宋金才20040601l掰安建筑利技大學(xué)’1j；{!!}；碩1卜學(xué)位滄叉深基坑圍護(hù)開挖與軟土非線性流變研究專業(yè)：巖土工程研究生：劉二栓導(dǎo)師：韓曉雷教授摘要{蝻建設(shè)中的深基坑開挖采用多種圍護(hù)形式，施Ⅱ_產(chǎn)生的習(xí)i境病害(主要是坑外剛近地表土層不均勻沉降及工程施工對(duì)道路交通的干擾)預(yù)測(cè)及防治已有—些經(jīng)驗(yàn)，但捌
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3、也不少。本文在已有研究成果的基礎(chǔ)上，對(duì)大面積軟±深基坑開挖時(shí)土層變位理論及應(yīng)用進(jìn)行了探討：依據(jù)現(xiàn)場(chǎng)監(jiān)測(cè)數(shù)據(jù)，推導(dǎo)出開挖時(shí)軟土變形
4、的經(jīng)驗(yàn)公式，分析了軟士深基開挖在圍護(hù)結(jié)構(gòu)剛度大、基坑防滲效果好的條-M：-F，基坑土層變位、圍護(hù)結(jié)構(gòu)受力破壞發(fā)展的主要原因。運(yùn)用巖土流變學(xué)的理論分析了沉降、躇螂開挖關(guān)系，并建立了與之相適應(yīng)的軟土非線H流變模型。用非線性流變有限元曰芋驗(yàn)證了結(jié)論的正確性。最后提出施工時(shí)j酣j監(jiān)測(cè)數(shù)據(jù)預(yù)怕圍護(hù)支撐的方法。本文將軟土深基開挖實(shí)踐與巖土力學(xué)理論緊密結(jié)合，部分研究成果對(duì)工程實(shí)際具有—定應(yīng)用價(jià)值。[關(guān)踺詞悃護(hù)結(jié)構(gòu)環(huán)境扁害深基圍護(hù)刑宅監(jiān)測(cè)防滲j戡瞄：流變STUDyONDEEPFOUNDATIONENcLOSUREEXCAVATIONANDNONLINEARRHEOLOGY
5、馴印f丁c明．r翻粥Major：GeotechnicalEngineeringPostgraduate-L／uErShuanAdviser：Prores$orHartXiaoLeiABSTRACTThedeepfoundationexcavationtakesmanymethodsofenclosure面cityconstruction，Todaytherearesomeimmatureexperiencesandlotsofteachesontheprediction，prevetionandthecontrolofenvironmentaldetrim
6、entaleffects(mainlyunevensoilsetoutsidefoundationpitandeffectOncityscapetraffic．etc．)causedbydeepfotmdationexcavatiortco恤strtmtiontakeninma-nykindsofenclosurestructures．BasedoBtheresearchworksofp聆decessor，thetheofy啦thedisplacementofsoilstrataindeepfoundationexcavationconstructiona
7、nditsapplicationarestudied證detail．Byatml．．ystngthesupervisionstatisticsfxomthepractical．excavationengineering,soilrheologyisthoughttobethemainreasonofthedisplacementheavyofthesoftsoilandthedestructionoftheenclosurestructure，indeepfoundationexcavationconstructiononconditionofthehig
8、htheriomorphicofenclosurestructureandgoodseepageresitting．TheexpericaIformulaofsoilsettlementinexcavationarealsoformulated．Usingthetheoryofsoilrheology，Therelationshipamongsettlement，plumpyandexcavation．ThenonlineartheologicalFEMprogrampertinenttoexoavatiouisalsoestablishedusedand
9、itsavaitabilityisprove8．Finaltytheme￡hod醢s證gsupervisionstatisticsisrepresemedinexcavationconstruction，which辮edi吐the硝愛建筑豐嘻技夫?qū)W』_‘程碩士學(xué)位論文criticalaxialforceofbracinginenclosurestructure．Inthepaper，thetheoryofgeomechanicsandtheengineeringarecollaboratecoherently．Someresuhscanbeappliedt
10、oexcavationconstructionsinsonicde
