双连拱隧道施工中衬砌开裂与力学行为研究进展  

RESEARCH PROGRESS ON CRACKING AND MECHANICAL BEHAVIOROF LINING DURING DOUBLE-ARCH TUNNEL CONSTRUCTION

作　　者：程晓辉[1] 随意 赵作周[1] 魏家旭 CHENG Xiao-hui;SUI Yi;ZHAO Zuo-zhou;WEI Jia-xu(Department of Civil Engineering,Tsinghua University,Beijing 100084,China;Railway Engineering Research Institute,China Academy of Railway Sciences Corporation Limited,Beijing 100081,China;Yunnan Construction and Investment Holding Group,Kunming 650501,China)

机构地区：[1]清华大学土木工程系,北京100084 [2]中国铁道科学研究院集团有限公司铁道建筑研究所,北京100081 [3]云南省建设投资控股集团有限公司,昆明650501

出　　处：《工程力学》2023年第5期1-19,共19页Engineering Mechanics

基　　金：香丽高速公路特殊结构隧道建造技术风险和优化研究项目(云交科教[2018]36号)。

摘　　要：双连拱隧道因其较高的空间利用率而在工程中被广泛应用,然而在后行洞施工过程中先行洞衬砌常发生开裂。为研究此过程中衬砌的开裂及力学行为,该文提出了将分布式光纤监测、反演分析方法及可反映混凝土开裂行为的有限元模拟相结合的研究方法,在广泛调研国内外文献的基础上,梳理总结了该课题组研究相关成果,包括:依托于实际工程,实现了分布式光纤监测在连拱隧道施工中的应用;提出了精度更高的衬砌结构力学行为反演分析方法;验证了利用总应变旋转裂缝本构模型反映复杂受力及约束下的钢筋混凝土构件力学性能和开裂模式的可行性。该文的研究方法与结论可为有关工程实践提供参考。Double-arch tunnels are widely used in engineering because of the high space usage.Cracking is frequently observed in the first tunnel lining during construction of the second tunnel.To study the cracking and mechanical behavior of the lining in this process,an analysis method including distributed optical-fibre monitoring,inversion analysis method and finite element simulation that can reflect concrete cracking is proposed in this paper.Domestic and foreign literatures are extensively investigated,and the relevant research results of the authors are summarized,including:based on the actual engineering case,the application of distributed opticalfibre monitoring in the double-arch tunnel construction is realized.A more accurate inversion analysis method of mechanical behavior of tunnel linings is proposed.The feasibility of using the total strain rotating crack constitutive model to reflect the mechanical properties and cracking modes of reinforced concrete components subjected to complex stress and confinement is verified.The research methods and conclusions in the paper can provide a reference for related engineering practice.

关 键 词：双连拱隧道 衬砌开裂 分布式光纤监测 基于曲梁理论的反演分析 总应变旋转裂缝本构模型 

分 类 号：U455.91[建筑科学—桥梁与隧道工程]