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MODERN TUNNELLING TECHNOLOGY 2019, Vol. 56 Issue (2) :111-118    DOI:
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Research on Subgrade Settlement Control Criterion for a Frame Bridge Passing underneath a Existing Railway
(1 Jiangxi Key Laboratory of Infrastructure Safety and Control in Geotechnical Engineering, East China Jiaotong University, Nanchang 330013; 2 China Railway Eryuan Engineering Group Co., Ltd., Chengdu 610031)
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Abstract In view of impact on subgrade settlement induced by a frame bridge passing underneath a existing rail? way, a 2D numerical simulation model was established by ABAQUS software to analyze the patterns of ground settlement curves under different buried depths and different ratios of height and width, to study the calculation method for controlling criterion of subgrade settlement caused by a frame bridge underneath a existing railway, with the results showing that the subgrade settlement curves can be fitted by Peck formula; the coefficient of settlement trough width is corrected considering the linear relationship between i and B2 + htan ( 45° - φ2 ) ; the proposed subgrade settlement control criterion based on the requirements of track regularity control considers the cross-section width of the frame bridge, buried depth and internal angle of soil mass.
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CHEN Li1
2 DIAO Xinhong1 YANG Shouxing1 CHEN Zhiliang1 ZHANG Kun1
KeywordsFrame bridge   Passing underneath railway   Numerical analysis   Subgrade settlement   Control criterion     
Abstract: In view of impact on subgrade settlement induced by a frame bridge passing underneath a existing rail? way, a 2D numerical simulation model was established by ABAQUS software to analyze the patterns of ground settlement curves under different buried depths and different ratios of height and width, to study the calculation method for controlling criterion of subgrade settlement caused by a frame bridge underneath a existing railway, with the results showing that the subgrade settlement curves can be fitted by Peck formula; the coefficient of settlement trough width is corrected considering the linear relationship between i and B2 + htan ( 45° - φ2 ) ; the proposed subgrade settlement control criterion based on the requirements of track regularity control considers the cross-section width of the frame bridge, buried depth and internal angle of soil mass.
KeywordsFrame bridge,   Passing underneath railway,   Numerical analysis,   Subgrade settlement,   Control criterion     
Cite this article:   
CHEN Li1, 2 DIAO Xinhong1 YANG Shouxing1 CHEN Zhiliang1 ZHANG Kun1 .Research on Subgrade Settlement Control Criterion for a Frame Bridge Passing underneath a Existing Railway[J]  MODERN TUNNELLING TECHNOLOGY, 2019,V56(2): 111-118
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