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    Discrete-Element Investigation on the Progressive Failure of Cut-and-Cover Tunnel Lining with Various Section Features

    Source: International Journal of Geomechanics:;2024:;Volume ( 024 ):;issue: 012::page 04024273-1
    Author:
    Liangliang Zhao
    ,
    Wenbo Yang
    ,
    Hu Fei
    ,
    Yang Liang
    ,
    Zhilong Wang
    ,
    Yuxiang Yao
    ,
    Sheng Li
    DOI: 10.1061/IJGNAI.GMENG-9020
    Publisher: American Society of Civil Engineers
    Abstract: Similar to the deep-buried tunnel, the lining of the cut-and-cover tunnel (CCT) exhibits varying degrees of cracking failure during ultrahigh backfill. To explore the whole progressive failure process of a high-filled cut-and-cover tunnel lining structure from the mesodamage to the macrolocal failure and then to the overall instability during backfill, based on the discrete-element program PFC2D, we simulated the mechanical behavior and fracture characteristics of the CCTs with rectangular, circular, and arch lining section features with the backfill height. Two load-reduction measures—load-reduction material (LRM) and the interaction of LRM and concrete walls—were then further proposed, and the impact of load-reduction measures on the progressive failure of CCT lining was analyzed. The simulation results show that the various lining section features indicate differences in the distribution and value of lining stress and fracture. But the CCT lining with features of the three sections exhibits a progressive failure process from cracking to local collapse and falling and finally to overall instability as the backfill height increases. Furthermore, the LRM and concrete walls can effectively reduce the vertical stress of the lining vault and the horizontal stress of the haunch, respectively, to ensure the stability and integrity of the CCT.
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      Discrete-Element Investigation on the Progressive Failure of Cut-and-Cover Tunnel Lining with Various Section Features

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    contributor authorLiangliang Zhao
    contributor authorWenbo Yang
    contributor authorHu Fei
    contributor authorYang Liang
    contributor authorZhilong Wang
    contributor authorYuxiang Yao
    contributor authorSheng Li
    date accessioned2025-04-20T10:16:04Z
    date available2025-04-20T10:16:04Z
    date copyright9/18/2024 12:00:00 AM
    date issued2024
    identifier otherIJGNAI.GMENG-9020.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4304353
    description abstractSimilar to the deep-buried tunnel, the lining of the cut-and-cover tunnel (CCT) exhibits varying degrees of cracking failure during ultrahigh backfill. To explore the whole progressive failure process of a high-filled cut-and-cover tunnel lining structure from the mesodamage to the macrolocal failure and then to the overall instability during backfill, based on the discrete-element program PFC2D, we simulated the mechanical behavior and fracture characteristics of the CCTs with rectangular, circular, and arch lining section features with the backfill height. Two load-reduction measures—load-reduction material (LRM) and the interaction of LRM and concrete walls—were then further proposed, and the impact of load-reduction measures on the progressive failure of CCT lining was analyzed. The simulation results show that the various lining section features indicate differences in the distribution and value of lining stress and fracture. But the CCT lining with features of the three sections exhibits a progressive failure process from cracking to local collapse and falling and finally to overall instability as the backfill height increases. Furthermore, the LRM and concrete walls can effectively reduce the vertical stress of the lining vault and the horizontal stress of the haunch, respectively, to ensure the stability and integrity of the CCT.
    publisherAmerican Society of Civil Engineers
    titleDiscrete-Element Investigation on the Progressive Failure of Cut-and-Cover Tunnel Lining with Various Section Features
    typeJournal Article
    journal volume24
    journal issue12
    journal titleInternational Journal of Geomechanics
    identifier doi10.1061/IJGNAI.GMENG-9020
    journal fristpage04024273-1
    journal lastpage04024273-15
    page15
    treeInternational Journal of Geomechanics:;2024:;Volume ( 024 ):;issue: 012
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
    نرم افزار کتابخانه دیجیتال "دی اسپیس" فارسی شده توسط یابش برای کتابخانه های ایرانی | تماس با یابش
    yabeshDSpacePersian