Comprehensive Prediction of Rockburst in High-Speed Railway Tunnel

2013 ◽  
Vol 477-478 ◽  
pp. 553-557
Author(s):  
Bo Li ◽  
Li Wu ◽  
Chang Mao Xu ◽  
Zhi Gang Li ◽  
Qing Jun Zuo
Keyword(s):  
Rock Burst ◽  
High Speed ◽  
Prediction Method ◽  
Inversion Method ◽  
Railway Tunnel ◽  
High Speed Railway ◽  
Structure Characteristics ◽  
Rock Burst Prediction ◽  
Tunnel Cross Section ◽  
Rock Lithology

Dayanwan tunnel in Shanghai-Kunming high-speed railway is deeply buried and its rock lithology is brittle and hard. The typical tunnel cross section was selected to do hydraulic fracturing field geostress test. The stress in the measured depth was obtained. In order to forecast the rock burst in the whole tunnel, the finite element inversion method has been used based on field geostress test. Lastly, the stress conditions, lithology, structure characteristics and groundwater conditions of surrounding rock were made as the general conditions to predict the rock burst comprehensively in Dayanwan tunnel. The results show this comprehensive prediction method is more accurate than the single rock burst prediction method used before. And it has a certain guiding significance in practice.

Research of Train Wind Characteristics in High-Speed Railway Tunnel

2014 ◽  
Vol 919-921 ◽  
pp. 865-868 ◽  
Author(s):  
Rui Zhen Fei ◽  
Li Min Peng ◽  
Wei Chao Yang ◽  
Wei Guang Yan
Keyword(s):  
High Speed ◽  
Stokes Equations ◽  
Three Dimensional ◽  
Time History ◽  
Space Distribution ◽  
Navier Stokes ◽  
Railway Tunnel ◽  
High Speed Railway ◽  
Navier Stokes Equations ◽  
Tunnel Cross Section

According to the 100㎡ high-speed tunnel cross-section which is generally used in high-speed railway of China, this paper develops a tunnel-air-train simulation model, based on the three-dimensional incompressible Navier-Stokes equations and the standard k-e turbulence model. Time-history variation rules and space distribution characteristics of train wind are studied respectively. The results show that: train wind is complex three-dimensional flow changing with time and space, air at the front of train flows away from the train head, while air at the rear of train flows to the train tail.

Geostress Measurement and Rock Burst Prediction Analysis for a Deep-Buried Long and Large High-Speed Railway Tunnel

2012 ◽  
Vol 256-259 ◽  
pp. 1359-1364
Author(s):  
Li Wu ◽  
Chang Mao Xu ◽  
Shuang Lan Wu ◽  
Li Shi
Keyword(s):  
Rock Burst ◽  
High Speed ◽  
Comprehensive Evaluation ◽  
Horizontal Stress ◽  
Railway Tunnel ◽  
Rock Burst Prediction ◽  
The Stability ◽  
Minimum Horizontal Stress ◽  
Maximum Horizontal Stress ◽  
Dominant Direction

Rock burst is one of the main geological disasters in deep-buried long and large tunnels, therefore rock burst prediction is necessary to ensure the safety of tunnel construction. Measuring the geostress in Yaojia tunnel, and using the Turchaninov and Russenes to conduct comprehensive evaluation, it turned out that the maximum horizontal stress is 3.6~12.5MPa and the minimum horizontal stress is 2.1~7.8MPa in the surveyed area, the dominant direction of the maximum horizontal stress is about N34 W, the angle between the maximum horizontal stress and the tunnel axis is about 83°. And these results showed Yaojia tunnel may occur slight rock burst within 400m of its length and it is adverse to the stability of tunnel surrounding rock.

Investigation of a loess-mudstone landslide and the induced structural damage in a high-speed railway tunnel

2020 ◽  
Vol 79 (5) ◽  
pp. 2201-2212
Author(s):  
Shunhua Zhou ◽  
Zhiyao Tian ◽  
Honggui Di ◽  
Peijun Guo ◽  
Longlong Fu
Keyword(s):  
Structural Damage ◽  
High Speed ◽  
Railway Tunnel ◽  
High Speed Railway

Typical Portal Structure for Single Track High Speed Railway Tunnel in Rugged Mountainous Area with High and Abrupt Slope

2014 ◽  
Vol 716-717 ◽  
pp. 342-346
Author(s):  
Xiao Jun Zhou ◽  
Bo Jiang ◽  
Yue Feng Zhou ◽  
Yu Yu
Keyword(s):  
High Speed ◽  
Southwest China ◽  
Earth Pressure ◽  
Mountainous Area ◽  
Single Track ◽  
Railway Tunnel ◽  
High Speed Railway ◽  
Railway Line ◽  
Bridge Abutment

On the basis of different landform and multifarious topography in rugged mountainous area in southwest China, typical tunnel portals for single track tunnels in a new high speed railway line have been presented in the paper. The portal comprises headwall, shed tunnel, bridge abutment and its support. Portal with headwall is suitable for tunnel to resist front earth pressure on high and abrupt slope. Shed tunnel is placed in front of headwall so as to prevent rockfall; its outward part is built into a flared one. Meanwhile, the installation of bridge and its abutment are also included in the portal according to landform in the paper.

Station Barendrecht: Roof Structure on Top of a High-Speed Railway Tunnel

2003 ◽  
Vol 87 (7) ◽  
pp. 15-21
Author(s):  
Bert Snijder ◽  
Jan Faber ◽  
Rinus Van Ommeren
Keyword(s):  
High Speed ◽  
Railway Tunnel ◽  
High Speed Railway ◽  
Roof Structure
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