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超大断面越江盾构隧道结构设计与力学分析

, PP. 76-80

Keywords: 隧道工程,越江盾构隧道,有限元方法,结构设计,力学分析,超大断面

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Abstract:

?介绍了三车道公路超大断面越江盾构隧道结构的详细设计过程,包括内净空布置、衬砌结构形式与厚度、管片分块和幅宽以及拼装方式等;采用梁-弹簧模型模拟管片衬砌结构,并借助于有限元数值模拟方法进行了隧道结构的力学特性分析。结果表明:在不同的拼装方式下,管片衬砌结构的力学特性是不相同的;通缝拼装时,管片结构的变形较大,弯矩最小;错缝拼装则相反,轴力变化不大;同是错缝拼装,随着K块位置的不同,其力学特征也不相同。

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