期刊文献+

高速铁路中等压缩性黏土沉降分析方法探讨 被引量:12

Discussion of Settlement Analysis Method for Mid-compressible Clay of High Speed Railway
下载PDF
导出
摘要 研究目的:河流高阶地冲积成因中等压缩性黏土是京沪高速铁路广泛分布的一种地基土,具有较高的天然地基强度,通常不存在填土稳定性问题,天然条件或经浅层处理即可满足沉降控制不十分严格工程的要求。而高速铁路无砟轨道对路基工后沉降有严格的控制要求,对该类土的总沉降和工后沉降分析采用常规的理论计算方法其计算精度无法满足设计的要求。本文通过京沪高速铁路地基土基本特性分析和天然地基的现场填筑试验,研究该类土的沉降分析方法。研究结论:总结了河流高阶地中等压缩性黏土的基本特性,特别是强结构性和高屈服强度的特性;分析了该类地基土在低荷载水平作用下的变形规律;提出了总沉降采用"弹性理论法",以及工后沉降采用基于弹性理论的"沉降完成比例"的计算方法,通常荷载稳定放置6个月后,沉降完成比例可达90%以上。 Research purposes: Mluvial mid -compressible clay on fluvial high terrace is widely distributed at the BeingShanghai high speed railway, which has a characteristic of high natural strength. Generally, there is no stability problem of filling and it can meet the need of engineering with no strict requirement for settlement when it at natural condition or after shalow layer treatment. However, ballastless track in high speed railway has strict requirements for subgrade residual settlement; Furthermore, current theoretical methods for calculating total and residual settlement of this type of soil can not meet the design requirement. So, through analysis of the basic characteristics of foundation soil and in - suit filling experiment on natural ground of Beijing - Shanghai high - speed railway, the settlement analysis method of this type of soil is studied. Research conclusions: Basic characteristics, especially strong structural characteristic and high yield strength characteristic of mid - compressible clay on fluvial high terrace are summarized in this paper. Deformation law of this kind of foundation soil under low loading level is analyzed; At last, different calculation methods are proposed to calculate different settlement, that is, elastic theory method and proportion of settlement - completion method based on elastic method can be used in total settlement and residual settlement calculation respectively. Generally speaking, after the load stable for 6 months, completion of the settlement ratio can be up to 90%.
出处 《铁道工程学报》 EI 北大核心 2011年第11期30-35,共6页 Journal of Railway Engineering Society
关键词 高速铁路 中等压缩性黏土 地基沉降 弹性理论法 high speed railway mid -compressible clay ground settlement elastic theory method
  • 相关文献

参考文献5

  • 1TB10621-2009,高速铁路设计规范(试行)[S].
  • 2李小和.客运专线路基地段铺设无碴轨道有关问题的探讨[J].铁道工程学报,2005,22(5):20-24. 被引量:10
  • 3GB50007-2002.建筑地基基础设计规范[S].[S].,..
  • 4中铁第四勘察设计院.软土地基路桥设计参数试验研究总报告[R].武汉:中铁第四勘察设计院,2004.
  • 5中铁第四勘察设计院.合宁铁路膨胀土处治技术研究报告[R].武汉:中铁第四勘察设计院,2007.

二级参考文献7

  • 1铁道第三勘察设计院.CHI高速铁路工程设计咨询报告(终稿)[R].,2005..
  • 2铁道科学研究院.客运专线无碴轨道铁路设计指南(报批稿)【R】.,2005..
  • 3铁建设[2004]157号.京沪高速铁路设计暂行规定【S】.[S].,..
  • 4铁道科学研究院铁建所.高速铁路线桥结构与技术条件(标准)研究总报告【R】.,1996..
  • 5DBDS836.路基工程设计、施工与维护【S】.[S].,..
  • 6Handbuch Erdbauwerke DER BANHNEN Eurailpress[M]. 2004.
  • 7钱立新.世界高速铁路技术[M].北京:中国铁道出版社,2003..

共引文献1933

同被引文献85

引证文献12

二级引证文献46

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部