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1、分類號(hào)：TD47密級(jí)：公開UDC：?jiǎn)挝淮a：10076工程碩士學(xué)位論文軟土深基坑樁錨支護(hù)設(shè)計(jì)與數(shù)值模擬分析作者姓名：李幼輝指導(dǎo)教師：葉洪東企業(yè)導(dǎo)師：沈振元申請(qǐng)學(xué)位級(jí)別：工程碩士工程領(lǐng)域：地質(zhì)工程所在單位：資源學(xué)院授予學(xué)位單位：河北工程大學(xué)ADissertationSubmittedtoHebeiUniversityofEngineeringFortheAcademicDegreeofMasterofEngineeringSoftsoildeepfoundationpileanchorbracingdesignandnumericalsimulationanalysisC
2、andidate：LiYouhuiSupervisor：YeHongdongPluralisticSupervisor:ShenZhenyuanAcademicDegreeAppliedfor：MasterofEngineeringSpecialty：GeologicalEngineeringCollege/Department：CollegeofResourceHebeiUniversityofEngineeringDecember，2014摘要21世紀(jì)后，隨著我國(guó)經(jīng)濟(jì)的迅猛發(fā)展，我國(guó)城市化進(jìn)程也在不斷加快，高層，超高層建筑不斷涌現(xiàn)，地下商場(chǎng)、地下停車場(chǎng)以及地下的市政
3、設(shè)施也在不斷增多，深基坑工程也越來越多。這些工程大多數(shù)都位于人口密集的城區(qū)，地質(zhì)條件以及周邊環(huán)境都比較復(fù)雜，同時(shí)基坑工程的規(guī)模也逐漸增大，這就對(duì)基坑工程的支護(hù)設(shè)計(jì)的合理性和安全性有了更高的要求。本文以溫州農(nóng)房項(xiàng)目深基坑工程為例，在深入研究了基坑工程中常見的支護(hù)結(jié)構(gòu)形式的特點(diǎn)及適用范圍后，結(jié)合工程的具體情況，選擇了樁錨支護(hù)方式。同時(shí)在分析了常用支護(hù)設(shè)計(jì)理優(yōu)缺點(diǎn)之后，選擇了等值梁法進(jìn)行支護(hù)結(jié)構(gòu)設(shè)計(jì)，再用彈性地基梁法進(jìn)行優(yōu)化，將優(yōu)化后的結(jié)果來進(jìn)行支護(hù)結(jié)構(gòu)設(shè)計(jì)。在支護(hù)設(shè)計(jì)完成后進(jìn)行基坑穩(wěn)定性驗(yàn)算，證明該支護(hù)方式是可行的。最后介紹了有限差分軟件FLAC3D的原理及特點(diǎn)，并用該軟件
4、對(duì)基坑開挖支護(hù)過程進(jìn)行數(shù)值模擬分析，得到土體的應(yīng)力以及位移的變化。通過對(duì)數(shù)值模擬結(jié)果進(jìn)行分析，可得出基坑開挖過程中存在的薄弱環(huán)節(jié)并提出合理的建議，對(duì)基坑支護(hù)方案進(jìn)行優(yōu)化。關(guān)鍵詞：深基坑；支護(hù)設(shè)計(jì)；穩(wěn)定性；數(shù)值模擬IAbstractAfterthe21century,withtherapiddevelopmentofChina'seconomy,China'surbanizationprocessisalsoaccelerating,high-risebuildingsareemerging,undergroundshoppingmalls,undergroundpark
5、ingandundergroundmunicipalfacilitiesaregrowing,deepexcavationalsomoreandmore.Mostoftheseprojectsarelocatedindenselypopulatedurbanareas，geologicalconditionsandthesurroundingenvironmentaremorecomplicated,andthescaleoftheexcavationisgraduallyincreasing,whichrationalityandsafetyofexcavations
6、upportdesignhavehigherrequirements.Inthispaper,ruralhousingprojectinWenzhoudeepexcavationprojectasanexample.In-depthstudyofthecharacteristicsandscopeofexcavationcommonformofthesupportingstructure,combinedwiththespecificcircumstancesoftheproject,thisdesignselectthemethodofanchoredpilesin.
7、Meanwhile,afteranalyzingtheadvantagesanddisadvantagesofcommonsupportdesignrationale,selecttheequivalentbeammethodsupportingstructuredesign.Thentheelasticfoundationbeammethodtooptimizetheresultswillbeoptimizedtosupportthestructuraldesign.Aftercompletionofexcavationsupportd
