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临近既有线基坑支护影响因素的正交分析

沈宇鹏 王辉煌 荆鹏 田亚护 付小雁

沈宇鹏, 王辉煌, 荆鹏, 田亚护, 付小雁. 临近既有线基坑支护影响因素的正交分析[J]. 交通运输工程学报, 2014, 14(2): 14-20.
引用本文: 沈宇鹏, 王辉煌, 荆鹏, 田亚护, 付小雁. 临近既有线基坑支护影响因素的正交分析[J]. 交通运输工程学报, 2014, 14(2): 14-20.
SHEN Yu-peng, WANG Hui-huang, JING Peng, TIAN Ya-hu, FU Xiao-yan. Orthogonal analysis of influence factors for foundation pit support approaching existing railway line[J]. Journal of Traffic and Transportation Engineering, 2014, 14(2): 14-20.
Citation: SHEN Yu-peng, WANG Hui-huang, JING Peng, TIAN Ya-hu, FU Xiao-yan. Orthogonal analysis of influence factors for foundation pit support approaching existing railway line[J]. Journal of Traffic and Transportation Engineering, 2014, 14(2): 14-20.

临近既有线基坑支护影响因素的正交分析

基金项目: 

国家自然科学基金项目 50908012

中央高校基本科研业务费专项资金项目 2011JBZ009

详细信息
    作者简介:

    沈宇鹏(1977-), 男, 浙江嵊州人, 北京交通大学副教授, 工学博士, 从事路基工程研究

  • 中图分类号: U213.1

Orthogonal analysis of influence factors for foundation pit support approaching existing railway line

More Information
    Author Bio:

    SHEN Yu-peng (1977-), male, associate professor, PhD, +86-10-51683954, ypshen@bjtu.edu.cn

  • 摘要: 以既有线的轨道水平作为控制标准, 对基坑尺寸、既有线形式与支护形式等影响因素进行正交优化分析, 并与现场沉降结果进行对比。根据极差和方差分析方法, 确定了临近既有线轨道水平的影响因素的重要性顺序, 分析了是否考虑渗流影响下的的轨道水平。分析结果表明: 临近既有线轨道水平的影响因素的重要性顺序依次为基坑宽度、既有线路基高度、既有线股道数量(路基面宽度)、基坑深度、支撑点位置、支撑强度、桩长和基坑距坡脚距离; 在支护参数中, 第1道支撑点位置是主导因素; 当考虑渗流后, 轨道水平将大大增加。建议在施工过程中, 优先考虑基坑宽度因素, 且临近既有线的开挖必须在止水条件下进行, 应采用优化参数的结构形式, 使得轨道水平在3.0mm范围内。

     

  • 图  1  基坑开挖断面

    Figure  1.  Excavation section of foundation pit

    图  2  场地平面布置

    Figure  2.  Field plane layout

    图  3  模拟结果与试验数据的比较

    Figure  3.  Comparation of simulation results and test data

    图  4  轨道水平计算结果对比

    Figure  4.  Comparation of calculation results for track levels

    表  1  地基土物理力学参数

    Table  1.   Physical and mechanical parameters of foundation soils

    下载: 导出CSV

    表  2  试验参数

    Table  2.   Test parameters

    下载: 导出CSV

    表  3  模型参数

    Table  3.   Model parameters

    下载: 导出CSV

    表  4  极差分析分析结果

    Table  4.   Extreme difference analysis result

    下载: 导出CSV

    表  5  方差分析结果

    Table  5.   Variance analysis results

    下载: 导出CSV
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出版历程
  • 收稿日期:  2013-12-17
  • 刊出日期:  2014-04-25

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