|Table of Contents|

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

《交通运输工程学报》[ISSN:1671-1637/CN:61-1369/U]

Issue:
2014年02期
Page:
14-20
Research Field:
道路与铁道工程
Publishing date:

Info

Title:
Orthogonal analysis of influence factors for foundation pit support approaching existing railway line
Author(s):
SHEN Yu-peng1; 2;  WANG Hui-huang1;  JING Peng1;  TIAN Ya-hu1; 2;  FU Xiao-yan1; 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
Keywords:
subgrade engineering;  approaching existing railway line;  orthogonal analysis;  foundation pit support;  track level;  seepage
PACS:
U213.1
DOI:
-
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. 5 tabs, 4 figs, 18 refs.

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Last Update: 2014-04-30