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    Experimental Study and Numerical Simulation on Concrete Box Culverts in Trenches

    Source: Journal of Performance of Constructed Facilities:;2010:;Volume ( 024 ):;issue: 003
    Author:
    Bao-guo Chen
    ,
    Jun-jie Zheng
    ,
    Jie Han
    DOI: 10.1061/(ASCE)CF.1943-5509.0000098
    Publisher: American Society of Civil Engineers
    Abstract: Concrete culverts in trenches have been widely used in expressways. Problems frequently take place because of improperly estimated vertical earth pressures on culverts. Different codes have been used in China to estimate the design load on culverts. In this study, a full-scale experiment and FEM simulation were conducted to evaluate the variation of vertical earth pressures and soil arching in backfill and to examine the accuracy of the methods recommended by different design codes including the prevailing Chinese General Code for Design of Highway Bridges and Culverts based on the linear earth pressure theory. The measured vertical earth pressures from the experiment were compared with those from the current theoretical methods. The variations of foundation pressure and settlement were also analyzed. The FEM simulation investigated the key influencing factors on the vertical earth pressures including the height of the embankment fill, the width of the trench, the slope angle of the trench, the dimensions of the culvert, the properties of the backfill, and the elastic modulus of the foundation soil. This research reveals that soil arch formed when the backfill on the culvert reached a certain height, but it was unstable. The coefficient of the vertical earth pressure on the top of the culvert was significantly different from that recommended by the Chinese General Code for Design of Highway Bridges and Culverts.
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      Experimental Study and Numerical Simulation on Concrete Box Culverts in Trenches

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    http://yetl.yabesh.ir/yetl1/handle/yetl/57689
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    contributor authorBao-guo Chen
    contributor authorJun-jie Zheng
    contributor authorJie Han
    date accessioned2017-05-08T21:37:17Z
    date available2017-05-08T21:37:17Z
    date copyrightJune 2010
    date issued2010
    identifier other%28asce%29cf%2E1943-5509%2E0000101.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/57689
    description abstractConcrete culverts in trenches have been widely used in expressways. Problems frequently take place because of improperly estimated vertical earth pressures on culverts. Different codes have been used in China to estimate the design load on culverts. In this study, a full-scale experiment and FEM simulation were conducted to evaluate the variation of vertical earth pressures and soil arching in backfill and to examine the accuracy of the methods recommended by different design codes including the prevailing Chinese General Code for Design of Highway Bridges and Culverts based on the linear earth pressure theory. The measured vertical earth pressures from the experiment were compared with those from the current theoretical methods. The variations of foundation pressure and settlement were also analyzed. The FEM simulation investigated the key influencing factors on the vertical earth pressures including the height of the embankment fill, the width of the trench, the slope angle of the trench, the dimensions of the culvert, the properties of the backfill, and the elastic modulus of the foundation soil. This research reveals that soil arch formed when the backfill on the culvert reached a certain height, but it was unstable. The coefficient of the vertical earth pressure on the top of the culvert was significantly different from that recommended by the Chinese General Code for Design of Highway Bridges and Culverts.
    publisherAmerican Society of Civil Engineers
    titleExperimental Study and Numerical Simulation on Concrete Box Culverts in Trenches
    typeJournal Paper
    journal volume24
    journal issue3
    journal titleJournal of Performance of Constructed Facilities
    identifier doi10.1061/(ASCE)CF.1943-5509.0000098
    treeJournal of Performance of Constructed Facilities:;2010:;Volume ( 024 ):;issue: 003
    contenttypeFulltext
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