浅析双圆盾构隧道管片衬砌内力计算与分析

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1、同济大学硕士学位论文双圆盾构隧道管片衬砌内力计算与分析姓名：楼葭菲申请学位级别：硕士专业：结构工程指导教师：张庆贺20040301摘要本文总结双圆盾构隧道盾构机械、管片形式、施工技术特点，分析双圆盾构隧道与传统单圆形盾构隧道相比的优缺点及其管片衬砌在不同施工阶段的受力特点。在分析现有的圆形隧道衬砌设计方法的基础上，针对双圆盾构隧道衬砌管片的结构特点和使用阶段的受荷情况，得出适合于双圆盾构隧道的工程设计的计算模型，推导出用自由变形的均质圆环模型计算双圆盾构法隧道衬砌内力的解析解公式。并结合具体工程，应用有限元计算方法和相关

2、模型试验资料对比验证自由变形模型计算公式的正确性。根据自由变形模型公式计算所得的双圆盾构隧道衬砌内力计算结果，分析归纳双圆盾构隧道衬砌内力分布的基本规律，并分析管片形式、管片外形特征等参数对衬砌内力的影响规律。研究的结果可供双圆盾构隧道施工及管片衬砌设计工程技术人员参考。关键词：双圆盾构、隧道衬砌、计算模型、自由变形模型、内力ABSTRACTInthispaper,thetunneldrivenbyoverlapped-double-circularcross．sectionshieldisstudied．Theover

3、lapped-double—circularcross．sectionshieldiscomparedwithtraditionalcircular-faceshieldonshieldmachine，segmentlining，constructingtechniqueandete．Thevirtuesanddisadvantagesofoverlapped-double—circularcross-sectionshieldaresummarized．Andthecharacteristicsofthe10adSon

4、thesegmentwhenconstructingaleanalyzed．Someofthestructuraldesignmodelsfortraditionalcircular-faceshielddriventunnelsarestudied．Inordertodesigntheliningofoverlapped—double—circularcross—sectiontunnel，themoresuitablemodelsareselectedafter1110difledwiththeshapeofstru

5、ctureandotherrelativecharacters．Usingthefreedeformationmodel，aseriesofanalyticalformulausedtocalculatetheintemalforceofsegmentisdeduced，whichissuitableforoverlapped—double-circularcross—sectiontunnel．Andwitllthecalculationofacertainproject,theFEMmethodandsomedata

6、ofrelativemodelexperimentareusedtoveil匆theforms．Aftertheinternalforceofanoverlapped-double—circularcross·sectiontunnelcalculatedbytheformula，whichisdeducedbytheauthor,isanalyzedsystematically’thebasicprinciplesoftheinternalforcedistributionofoverlapped-double—-ci

7、rcularcross—sectiontunnelandtheeffectsoftheappearancecharacteristicsofsegmentonitsinternalforcearegot．Andacomprehensiveevaluation，whichCanbeareferenceforthepeoplewhodesignorconstructtheoverlapped·-double·-circularcross—sectionshielddriventunnel，isgivenintheendoft

8、hispaper．KeyWordsoverlapped-double—circularcross-sectionshield，tunnelsegmentlining，calculationmodel，freedeformationmodel，innerforce声明本人郑重声明：本人在导师的指导下，独立进行研究工作所