Mutual influence of long-span urban highway tunnel and rail transit construction

2021 ◽  
pp. 1-15
Author(s):  
Honglin Yu ◽  
Shiyang Liu ◽  
Chun Zheng ◽  
Yun Li ◽  
Jie Liu
Keyword(s):  
Mutual Influence ◽  
Vertical Displacement ◽  
Relative Displacement ◽  
Urban Rail Transit ◽  
Rail Transit ◽  
Railway Line ◽  
Long Span ◽  
Highway Tunnel ◽  
Urban Rail ◽  
Secondary Lining

In order to analyze the mutual influence between the long-span highway tunnel and urban rail transit tunnel that is constructed at proximity, this paper established 3D finite element models based on Chongqing Zengjiayan Tunnel and the Metro Railway Line 9 and Line 10 projects to calculate and analyze the secondary lining stress, distribution and change law of deformation of Zengjiayan Tunnel and the Metro Railway Line Tunnel. The results show that: (1) The main risk of the Zengjiayan Tunnel is that the tunnel body might displace in the excavation and the surrounding rock stress could possibly change. The forces undertaken by the main structure of the cross-section are calculated and analyzed based on the shallow buried tunnel. Accordingly, the horizontal and vertical displacement limit and relative displacement meet the relevant specification; (2) Zengjiayan Tunnel over the lobby of Liyuchi Station, a transitional station of Line 9 and Line 10. The main risk is the displacement of the transitional channel in the excavation and changes in the stress on surrounding rocks, but the risk of self-structure excavation and support is under control.

Study on the Longitudinal Horizontal Stiffness Limited Value of 20m Simply Supported Beam Pier Top of Urban Rail Transit

2014 ◽  
Vol 501-504 ◽  
pp. 1129-1135
Author(s):  
Xian Xing Dai ◽  
Ting Lin Liu ◽  
Zhen Wei Xiong ◽  
Ping Wang
Keyword(s):  
Element Model ◽  
Relative Displacement ◽  
Urban Rail Transit ◽  
Rail Transit ◽  
Simply Supported Beam ◽  
Double Line ◽  
Simply Supported ◽  
Urban Rail ◽  
Bending Mode ◽  
Common Application

Considering the common application of the 20m simply supported beam in modern urban rail transit, an integrative rail-bridge-pier finite element model is developed. The force imposed on the pier, abutment and rail are calculated in different conditions, including the bridge stretching, bending and braking. In addition, the displacement of pier top and the maximum rapid relative displacement between girder and track are also calculated. The results are shown as follows: in terms of multiple span simply supported beams, the most harmful bending mode is when the load distributes on two adjacent simply supported beams. According to the additional braking tension force, as well as the additional braking pressure and the rapid relative displacement between girder and track, the most harmful breaking mode can be confirmed respectively. In the paper, the minimum value of the longitudinal horizontal linear stiffness of 20m simply supported beam piers is 120 kN/cm (double-line).

Alignment control for a long span urban rail-transit cable-stayed bridge considering dynamic train loads

2016 ◽  
Vol 59 (11) ◽  
pp. 1759-1770 ◽  
Author(s):  
ZengShun Chen ◽  
JianTing Zhou ◽  
Kim Tim Tse ◽  
Gang Hu ◽  
Yong Li ◽  
...  
Keyword(s):  
Urban Rail Transit ◽  
Rail Transit ◽  
Cable Stayed Bridge ◽  
Long Span ◽  
Urban Rail

Influence of Built Environment on Urban Rail Transit Connection Mode

CICTP 2020 ◽  
2020 ◽  
Author(s):  
Zhao Gao ◽  
Min Yang ◽  
Guoqiang Li ◽  
Jinghua Tai
Keyword(s):  
Built Environment ◽  
Urban Rail Transit ◽  
Rail Transit ◽  
Urban Rail

Study on Improvement of Urban Rail Transit Access Based on Pareto-IPA Model

CICTP 2020 ◽  
2020 ◽  
Author(s):  
Yucheng Wang ◽  
Mo Chen ◽  
Zhi Dong ◽  
Liang Tian ◽  
Kuo Guan ◽  
...  
Keyword(s):  
Urban Rail Transit ◽  
Rail Transit ◽  
Urban Rail
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