Analysis on the influence of double-line large diameter shield tunnel orthogonally underpassing tunneling on railway track group

4th International Conference on Applied Materials and Manufacturing Technology

材料科学;机械制造

Liu, Chuanguang^1 ; Liu, Yan^1,2 ; Zhang, Liangliang^3

School of Civil Engineering and Architecture, University of Jinan, Jinan

250022, China^1

Eng. Technol. Res. Ctr. for Urban Underground Eng. Supporting and Risk Monitoring of Shandong Prov., China^2

China Railway Siyuan Survey and Design Group Co., LTD., China^3

关键词: Existing railway;    Ground settlement;    Railway engineering;    Railway passengers;    Railway subgrade;    Reconstruction projects;    Shield construction;    Three-dimensional numerical simulations;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/423/1/012024/pdf
DOI  :  10.1088/1757-899X/423/1/012024

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

In the process of urban traffic construction and reconstruction, the number of new tunnels crossing existing railways is increasing day by day.Based on the reconstruction project tunnel of Xiangyang Road in Weifang city underpassing Jiaoji Railway passenger dedicated line and Jiaoji Railway, the outer diameter of shield tunnel is 10.7 m, and the minimum cover soil thickness is 10.5 m, and the crossing length is 60 m. The three dimensional numerical simulation analysis was carried out to study the influence of the construction of the double-line parallel shield tunnel on the existing railway track group. The results show that the final settlement of the ground settlement of the railway subgrade centerline is "bimodal shape"; the maximum value of ground subsidence in the centerline of shield tunnel is -2.29mm, and the longitudinal influence range of shield construction is approximately 20 meters in front of the face to 40 meters in the rear. This study provides a reference for the implementation of similar double-line shield tunnel underpass railway engineering.