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    Effects of Undercrossing Tunneling on Existing Shield Tunnels

    Source: International Journal of Geomechanics:;2021:;Volume ( 021 ):;issue: 008::page 04021131-1
    Author:
    Bo Liu
    ,
    Zhiwei Yu
    ,
    Ronghui Zhang
    ,
    Yanhui Han
    ,
    Zhiliu Wang
    ,
    Shijie Wang
    DOI: 10.1061/(ASCE)GM.1943-5622.0002102
    Publisher: ASCE
    Abstract: The lining rings of a shield tunnel are connected by steel bolts, which play an important role in longitudinal structural deformation during long-term operation. In recent decades, there have been increasing numbers of tunnel-crossing projects. In order to better understand the impact of undercrossing excavations on existing tunnels and to provide a quick and effective tool for evaluating the behaviors of existing tunnels before construction, a simplified analytical method is proposed. In the proposed model, a tunnel was simplified into a series of short beams connected by shear, tensile, and compressive springs, and the Pasternak two-parameter foundation model was used to describe the tunnel–soil interaction. The tunnel model not only considers the shear effect between the linings but also the rotation effect of the lining ring. The field data from two cases were used to compare with the calculated results, and the predictions were found to be in good agreement with the measured data, thus verifying the effectiveness of the method.
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      Effects of Undercrossing Tunneling on Existing Shield Tunnels

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4271438
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    contributor authorBo Liu
    contributor authorZhiwei Yu
    contributor authorRonghui Zhang
    contributor authorYanhui Han
    contributor authorZhiliu Wang
    contributor authorShijie Wang
    date accessioned2022-02-01T00:26:25Z
    date available2022-02-01T00:26:25Z
    date issued8/1/2021
    identifier other%28ASCE%29GM.1943-5622.0002102.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4271438
    description abstractThe lining rings of a shield tunnel are connected by steel bolts, which play an important role in longitudinal structural deformation during long-term operation. In recent decades, there have been increasing numbers of tunnel-crossing projects. In order to better understand the impact of undercrossing excavations on existing tunnels and to provide a quick and effective tool for evaluating the behaviors of existing tunnels before construction, a simplified analytical method is proposed. In the proposed model, a tunnel was simplified into a series of short beams connected by shear, tensile, and compressive springs, and the Pasternak two-parameter foundation model was used to describe the tunnel–soil interaction. The tunnel model not only considers the shear effect between the linings but also the rotation effect of the lining ring. The field data from two cases were used to compare with the calculated results, and the predictions were found to be in good agreement with the measured data, thus verifying the effectiveness of the method.
    publisherASCE
    titleEffects of Undercrossing Tunneling on Existing Shield Tunnels
    typeJournal Paper
    journal volume21
    journal issue8
    journal titleInternational Journal of Geomechanics
    identifier doi10.1061/(ASCE)GM.1943-5622.0002102
    journal fristpage04021131-1
    journal lastpage04021131-12
    page12
    treeInternational Journal of Geomechanics:;2021:;Volume ( 021 ):;issue: 008
    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
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