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

临近既有线基坑支护影响因素的正交分析

沈宇鹏^{1, 2,},
王辉煌¹,
荆鹏¹,
田亚护^{1, 2},
付小雁^{1, 3}

1.
北京交通大学土木建筑工程学院, 北京 100044
2.
北京交通大学轨道工程北京市重点实验室, 北京 100044
3.
天津铁道职业技术学院, 天津 300240

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

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

SHEN Yu-peng^{1, 2
,},
WANG Hui-huang¹,
JING Peng¹,
TIAN Ya-hu^{1, 2},
FU Xiao-yan^{1, 3}

1.
School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China
2.
Beijing Key Laboratory of Track Engineering, Beijing Jiaotong University, Beijing 100044, China
3.
Tianjin Railway Technical and Vocational College, Tianjin 300240, China

More Information

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

摘要

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。
- 路基工程 /
- 临近既有线 /
- 正交分析 /
- 基坑支护 /
- 轨道水平 /
- 渗流
Abstract: The track level of existing railway line was taken as control standard, the influence factors including foundation pit size, existing railway line form and support form were orthogonally analyzed, and the calculation results and field settlement situation were compared. Based on the analysis methods of range and variance, the importance order of influence factors on track level approaching existing railway line was determined, and the track levels were analyzed with and without seepage.Analysis result shows that the importance order of influence factors on track level approaching existing railway line are the width of foundation pit, the subgrade height of existing railway line, the track number of existing railway line (the width of subgrade surface), the depth of foundation pit, support point position, support strength, pile length and the distance from foundation pit to slope toe.For support parameters, the first support position is dominant influence factor.When seepage is considered, the railway track level increases greatly.It is suggested to consider the width of foundation pit preferentially in construction process.The excavation approaching existing railway line should be done under sealing condition.The structure type with optimized parameters should be used to make railway track level less than 3.0 mm.
- subgrade engineering /
- approaching existing railway line /
- orthogonal analysis /
- foundation pit support /
- track level /
- seepage

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图 1 基坑开挖断面

Figure 1. Excavation section of foundation pit

下载: 全尺寸图片幻灯片

图 2 场地平面布置

Figure 2. Field plane layout

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图 3 模拟结果与试验数据的比较

Figure 3. Comparation of simulation results and test data

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图 4 轨道水平计算结果对比

Figure 4. Comparation of calculation results for track levels

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表 1 地基土物理力学参数

Table 1. Physical and mechanical parameters of foundation soils

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表 2 试验参数

Table 2. Test parameters

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表 3 模型参数

Table 3. Model parameters

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表 4 极差分析分析结果

Table 4. Extreme difference analysis result

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表 5 方差分析结果

Table 5. Variance analysis results

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临近既有线基坑支护影响因素的正交分析

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

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

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

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临近既有线基坑支护影响因素的正交分析

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

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出版历程

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

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

计量

出版历程

目录

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

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