超长桩竖向承载性状影响因素的有限元分析

罗滔 傅少君 敖霞

PDF(353 KB)
中国农村水利水电 ›› 2018 ›› (1) : 135-139.
水工建筑

超长桩竖向承载性状影响因素的有限元分析

  • 罗滔1,傅少君2,敖霞3
作者信息 +

FEM Analysis of the Influence Factors on the Characteristics of Vertically Loaded Over-length Single Pile

  • LUO Tao1 ,FU Shao-jun2 ,AO Xia3
Author information +
稿件信息 +

摘要

超长桩的竖向承载机理及其影响因素一直是工程中的热点研究问题。采用非线性有限元方法,通过数值分析手段分别模拟了不同桩长径比、桩土弹模比、桩端土与桩周土弹模比以及邻近堆载,以桩身轴力沿桩身分布规律为指标系统分析各种因素对超长桩竖向承载性状的影响,揭示超长桩的竖向荷载传递机理,为超长桩的设计和施工提供参考。

Abstract

The vertical bearing mechanism of over-length piles and its influence factors has been a hot research problem in engineering. Nonlinear finite element method is adopted to simulate the response of over-length pile under vertical load. Factors of different pile length to diameter ratio,different elastic modulus ratio of pile to soil,different elastic modulus ratio of soil under pile to soil adjacent pile and different magnitudes and distances of neighbor loads are considered. The effect of different factors on the vertical bearing mechanism of over-length pile is evaluated by the distribution of axial force along the pile body. The vertical load transfer mechanism of over-length pile is revealed, some useful conclusions are provided for the design and construction of over-length pile.

Key words

超长桩 / 承载机理 / 桩身轴力 / 堆载临近 / 非线性有限元

基金

西京学院特区人才科研启动专项基金; 贵州省科技计划 项目( 黔科合基础[2016]1154) 

引用本文

导出引用
罗滔 傅少君 敖霞. 超长桩竖向承载性状影响因素的有限元分析[J].中国农村水利水电, 2018(1): 135-139
LUO Tao , FU Shao-jun , AO Xia. FEM Analysis of the Influence Factors on the Characteristics of Vertically Loaded Over-length Single Pile[J].China Rural Water and Hydropower, 2018(1): 135-139

参考文献

[1] 张 雁,刘金波.桩基手册[M].中国建筑工业出版社,2009. 

[2] JGJ94-2008,建筑桩基技术规范[S]. 

[3] Bransby M F,Springman S M. 3-D finite element modeling of pile groups adjacent to surcharge loads [J]. Computers and Geo - technique,1996,19( 4) : 301-324. 

[4] Lee C J. Development of downdrag on piles and pile groups in consolidation soil[J]. Journal of Geotechnical and Geo-environmental Engineering,2004,130( 9) : 905-914. 

[5] Taciroglu E,Rha C S,Wallace J W. A robust macroelement model for soil-pile interaction under cyclic Loads [J]. Journal of Geotechnical and Geo-environmental Engineering,ASCE,2006,132( 10) : 1 304- 1 314. 

[6] Comodromos E M. Response prediction for horizontally loaded pile groups[J]. International Journal for Numerical and Analytical Methods in Geomechanics,2005,29: 597-625. 

[7] 姚文娟,陈尚平,陈 杰,等. 堆载作用下桩基承载性能数值分析 [J]. 土木建筑与环境工程,2012,34( 4) : 6-11. 

[8] 杨 敏,周洪波,杨 桦. 基坑开挖与临近桩基相互作用分析 [J]. 土木工程学报,2005,38( 4) : 91-96. 

[9] 张石虎,敖 霞,傅少君,等. 某公路扩建工程对高铁桥墩桩基的 影响分析[J]. 岩土工程学报,2013,35( S2) : 464-470. 

[10] 王俊杰,朱俊高,魏 松.不同桩底地层超长桩工作性能的数值 模拟[J]. 岩土力学,2005,26( 2) : 328-331. [11] 张齐兴,姚 波,俞中奇.超长摩擦桩承载性状的有限元法[J]. 河海大学学报,2007,35( 6) : 681-685. 

[12] 吴 鹏,龚维明,梁书亭.用三维有限元法对超长单桩桩端承载 力的研究[J].岩土力学,2006,27( 10) : 1 795-1 799. 

[13] 吴 鹏,龚维明,梁书亭.考虑深度效应的超长单桩荷载传递性 状的研究[J].岩土力学,2007,28( 6) : 1 265-1 268. 

[14] 蒋建平,章杨松,高广发,等.大直径超长灌注桩弹塑性有限元分 析[J].力学季刊,2006,27( 2) : 354-358. [15] 陈胜宏. 计算岩体力学与工程[M]. 北京: 中国水利水电出版 社,2006.

PDF(353 KB)

访问

引用

详细情况

段落导航
相关文章

/