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1、分類號:TD47密級:公開UDC:單位代碼:10076工程碩士學位論文軟土深基坑樁錨支護設計與數(shù)值模擬分析作者姓名:李幼輝指導教師:葉洪東企業(yè)導師:沈振元申請學位級別:工程碩士工程領域:地質工程所在單位:資源學院授予學位單位:河北工程大學ADissertationSubmittedtoHebeiUniversityofEngineeringFortheAcademicDegreeofMasterofEngineeringSoftsoildeepfoundationpileanchorbracingdesignandnumericalsimulationanalysisC
2、andidate:LiYouhuiSupervisor:YeHongdongPluralisticSupervisor:ShenZhenyuanAcademicDegreeAppliedfor:MasterofEngineeringSpecialty:GeologicalEngineeringCollege/Department:CollegeofResourceHebeiUniversityofEngineeringDecember,2014摘要21世紀后,隨著我國經(jīng)濟的迅猛發(fā)展,我國城市化進程也在不斷加快,高層,超高層建筑不斷涌現(xiàn),地下商場、地下停車場以及地下的市政
3、設施也在不斷增多,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),地質條件以及周邊環(huán)境都比較復雜,同時基坑工程的規(guī)模也逐漸增大,這就對基坑工程的支護設計的合理性和安全性有了更高的要求。本文以溫州農(nóng)房項目深基坑工程為例,在深入研究了基坑工程中常見的支護結構形式的特點及適用范圍后,結合工程的具體情況,選擇了樁錨支護方式。同時在分析了常用支護設計理優(yōu)缺點之后,選擇了等值梁法進行支護結構設計,再用彈性地基梁法進行優(yōu)化,將優(yōu)化后的結果來進行支護結構設計。在支護設計完成后進行基坑穩(wěn)定性驗算,證明該支護方式是可行的。最后介紹了有限差分軟件FLAC3D的原理及特點,并用該軟件
4、對基坑開挖支護過程進行數(shù)值模擬分析,得到土體的應力以及位移的變化。通過對數(shù)值模擬結果進行分析,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,對基坑支護方案進行優(yōu)化。關鍵詞:深基坑;支護設計;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