斜坡段路基椅式桩板支挡结构力学特性分析
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摘要
椅式桩板支挡结构是一种根据陡坡地段的特殊要求提出的新型支挡结构,为研究该新型支挡结构在高速铁路陡坡路基段的内力及变形规律,文章采用有限元软件Abaqus建立了陡坡路基段的椅式桩板三维模型进行研究,结果表明:(1)椅式桩板支挡结构构件中横梁受力最为复杂,是支挡结构中的薄弱构件;(2)桩土作用力受到覆土厚度变化的影响较大,桩悬臂段土压力分布近似为抛物线分布;(3)椅式桩板整体结构具有较强的抗变形能力以及整体协同性,能有效维持陡坡的稳定。
The chair-shaped pile plate retaining structure is a new type of retaining structure proposed according to the special requirements of the steep slope section. In order to analyze the internal force and deformation characteristics of the new retaining structure on the steep slope subgrade section of the high-speed railway,the finite element software Abaqus is used in this paper. A three-dimensional calculation model for the chair-shaped pile plate on the steep slope subgrade section is established. The results show that:( 1) The cross beam in the chair-shaped pile plate retaining structure is the most complex and the weakest member in the retaining structure;( 2) Pile soil force is affected by the change of the soil cover thickness,and the distribution of earth pressure in the cantilever section is approximately parabolic distribution;( 3) The chair-shaped pile plate retaining structure has strong resistance to deformation and good cooperating performance,and can effectively maintain the stability of the steep slope.
The chair-shaped pile plate retaining structure is a new type of retaining structure proposed according to the special requirements of the steep slope section. In order to analyze the internal force and deformation characteristics of the new retaining structure on the steep slope subgrade section of the high-speed railway,the finite element software Abaqus is used in this paper. A three-dimensional calculation model for the chair-shaped pile plate on the steep slope subgrade section is established. The results show that:( 1) The cross beam in the chair-shaped pile plate retaining structure is the most complex and the weakest member in the retaining structure;( 2) Pile soil force is affected by the change of the soil cover thickness,and the distribution of earth pressure in the cantilever section is approximately parabolic distribution;( 3) The chair-shaped pile plate retaining structure has strong resistance to deformation and good cooperating performance,and can effectively maintain the stability of the steep slope.
引文
[1]苏谦,李安洪,丁兆锋,等.郑西客运专线深厚湿陷性黄土地基桩板结构设计分析[J].铁道建筑技术,2007,24(2):1-4.SU Qian,LI Anhong,DING Zhaofeng,et al. Analysis on Design onPile-board Structure of Deep Collapsible Loess Ground AlongZhengzhou-Xi'an Passenger Dedicated Railway line[J]. RailwayConstruction Technology,2007,24(2):1-4.
[2]白皓.椅式桩板墙受力机制与设计计算方法研究[D].成都.西南交通大学,2013.BAI Hao. Research on Stress Mechanism and Calculation Method ofChair-shaped Sheet-pile Wall[D]. Chengdu:Southwest JiaotongUniversity,2013.
[3]姚裕春,袁碧玉.无砟轨道铁路陡坡路基加固结构创新方法分析[J].高速铁路技术,2015,6(4):31-35.YAO Yuchun, YUAN Biyu. Analysis on Innovative Methods ofReinforcing Structure of Steep Slope Subgrade of Ballastless TrackRailway[J]. High Speed Railway Technology,2015,6(4):31-35.
[4]薛照钧.铁路客运专线软弱地基低矮路堤采用无梁板桩柱结构技术研究[J].铁道工程学报,2007,24(5):12-15.XUE Zhaojun. Research on the Technology of Flat-slab Beamless PileStructure for Low Embankment of Soft Weak Subgrade of PassengerDedicated Railway Line[J]. Journal of Railway Engineering Society,2007,24(5):12-15.
[5]詹永祥,蒋关鲁,牛国辉,等.武广线高边坡陡坡地段桩板结构路基的设计理论探讨[J].铁道工程学报,2007,24(S1):94-101.ZHAN Yongxiang, JIANG Guanlu, NIU Guohui, et al. DesignTheory of Pile-slab Embankment on High Slope Steep Slope Section ofWuhan-Guangzhou Railway Line[J]. Journal of Railway EngineeringSociety,2007,24(S1):94-101.
[6]姚裕春,李安洪,苏谦.陡坡椅式桩板结构受力模式及计算方法分析[J].铁道工程学报,2016,33(8):71-76.YAO Yuchun,LI Anhong,SU Qian. Analysis of Force Model andCalculation Method of Chair-shaped Sheet-pile Structure Constructedon Steep Slope[J]. Journal of Railway Engineering Society,2016,33(8):71-76.
[7]詹永祥.高速铁路无碴轨道桩板结构路基设计理论及试验研究[D].成都:西南交通大学,2007.ZHAN Yongxiang. Theory and Experimental Research on the Designof Pile-slab Roadbed of High-speed Railway Ballastless Track[D].Chengdu:Southwest Jiaotong University,2007.
[8] JGJ 94-2008建筑桩基技术规范[S].JGJ 94-2008 Building Pile Foundation[S].
[9]李中国.基于结构-土相互作用的高填方锚索桩板墙设计理论的研究[D].北京:中国铁道科学研究院,2011.LI Zhongguo. Research on the Design Theory of High Fill AnchorSlab-pile Wall Based on Structure-soil Interaction[D]. Beijing:China Academy of Railway Sciences,2011.
[2]白皓.椅式桩板墙受力机制与设计计算方法研究[D].成都.西南交通大学,2013.BAI Hao. Research on Stress Mechanism and Calculation Method ofChair-shaped Sheet-pile Wall[D]. Chengdu:Southwest JiaotongUniversity,2013.
[3]姚裕春,袁碧玉.无砟轨道铁路陡坡路基加固结构创新方法分析[J].高速铁路技术,2015,6(4):31-35.YAO Yuchun, YUAN Biyu. Analysis on Innovative Methods ofReinforcing Structure of Steep Slope Subgrade of Ballastless TrackRailway[J]. High Speed Railway Technology,2015,6(4):31-35.
[4]薛照钧.铁路客运专线软弱地基低矮路堤采用无梁板桩柱结构技术研究[J].铁道工程学报,2007,24(5):12-15.XUE Zhaojun. Research on the Technology of Flat-slab Beamless PileStructure for Low Embankment of Soft Weak Subgrade of PassengerDedicated Railway Line[J]. Journal of Railway Engineering Society,2007,24(5):12-15.
[5]詹永祥,蒋关鲁,牛国辉,等.武广线高边坡陡坡地段桩板结构路基的设计理论探讨[J].铁道工程学报,2007,24(S1):94-101.ZHAN Yongxiang, JIANG Guanlu, NIU Guohui, et al. DesignTheory of Pile-slab Embankment on High Slope Steep Slope Section ofWuhan-Guangzhou Railway Line[J]. Journal of Railway EngineeringSociety,2007,24(S1):94-101.
[6]姚裕春,李安洪,苏谦.陡坡椅式桩板结构受力模式及计算方法分析[J].铁道工程学报,2016,33(8):71-76.YAO Yuchun,LI Anhong,SU Qian. Analysis of Force Model andCalculation Method of Chair-shaped Sheet-pile Structure Constructedon Steep Slope[J]. Journal of Railway Engineering Society,2016,33(8):71-76.
[7]詹永祥.高速铁路无碴轨道桩板结构路基设计理论及试验研究[D].成都:西南交通大学,2007.ZHAN Yongxiang. Theory and Experimental Research on the Designof Pile-slab Roadbed of High-speed Railway Ballastless Track[D].Chengdu:Southwest Jiaotong University,2007.
[8] JGJ 94-2008建筑桩基技术规范[S].JGJ 94-2008 Building Pile Foundation[S].
[9]李中国.基于结构-土相互作用的高填方锚索桩板墙设计理论的研究[D].北京:中国铁道科学研究院,2011.LI Zhongguo. Research on the Design Theory of High Fill AnchorSlab-pile Wall Based on Structure-soil Interaction[D]. Beijing:China Academy of Railway Sciences,2011.