scholarly journals The Multiplied Tunnel Support System Applied to Squeezing Ground Condition.

2002 ◽  
pp. 27-39 ◽  
Author(s):  
Shuzo KITAGAWA ◽  
Yuzo KAJIWARA ◽  
Masato SHINJI
Keyword(s):  
Support System ◽  
Squeezing Ground ◽  
Tunnel Support ◽  
Ground Condition

scholarly journals Support System for Tunnelling in Squeezing Ground of Qingling-Daba Mountainous Area: A Case Study from Soft Rock Tunnels

2019 ◽  
Vol 2019 ◽  
pp. 1-17 ◽  
Author(s):  
Xiuling Wang ◽  
Jinxing Lai ◽  
Rodney Sheldon Garnes ◽  
Yanbin Luo
Keyword(s):  
Support System ◽  
Strong Support ◽  
Mountainous Area ◽  
Squeezing Ground ◽  
Tunnel Face ◽  
Support Design ◽  
Tunnel Support ◽  
Geological Conditions ◽  
Rock Tunnels

Tunnelling or undertaking below-ground construction in squeezing ground can always present many engineering surprises, in which this complicated geology bring a series of tunnelling difficulties. Obviously, if the major affecting factors and mechanism of the structure damage in these complicated geological conditions are determined accurately, fewer problems will be faced during the tunnel excavation. For this study, reference is made to four tunnel cases located in the Qingling-Daba mountainous squeezing area that are dominated by a strong tectonic uplift and diversified geological structures. This paper establishes a strong support system suitable for a squeezing tunnel for the purpose of addressing problems exhibited in the extreme deformation of rock mass, structure crack, or even failure during excavation phase. This support system contains a number of temporary support measures used for ensuring the stability of tunnel face during tunnelling. The final support system was constructed, including some key techniques such as the employment of the foot reinforcement bolt (FRB), an overall strong support measure, and more reserved deformation. Results in this case study showed significant effectiveness of the support systems along with a safe and efficient construction process. The tunnel support system proposed in this paper can be helpful to support design and provide sufficient support and arrangement before tunnel construction in squeezing ground.

Numerical Analysis of Tunnel Support System at Pune Metro

2021 ◽  
Vol 9 (VII) ◽  
pp. 3681-3687
Author(s):  
Saurabh B. Yele
Keyword(s):  
Transport System ◽  
Support System ◽  
Public Transport ◽  
Transportation Systems ◽  
Vital Role ◽  
Industrial Growth ◽  
Rapid Urbanization ◽  
Tunnel Support ◽  
Underground Tunnel ◽  
Public Transport System

Pune has witnessed enormous industrial growth, rapid urbanization in the recent past and has put the city's travel infrastructure to stress. Being a densely populated area, Pune's traffic needs cannot be met by road-based transportation systems and additional flyovers. Considering this, the Pune Metro project a strong public transport system partly elevated, and partly underground Line 1 and the completely elevated Line 2 has been discussed and undertaken by Maha Metro Rail Corporation. With the rise in demand, the responsibility for a safe and efficient public transport system also increases hence proper planning, designing, and execution play a vital role. The underground tunnel stretch of the Pune Metro Line 1 project is carried out by TBM and by segmental lining as a support system. By geotechnical parameters and FEM, RS2 software author analyses the ground behaviour and support system and conveys a basic understanding of ground behaviour and results in guidelines for designing the underground tunnel.

Modelling of Response of Tunnels Excavated in Squeezing Ground Condition

2020 ◽  
pp. 667-687
Author(s):  
Dipaloke Majumder ◽  
M. N. Viladkar ◽  
Mahendra Singh
Keyword(s):  
Squeezing Ground ◽  
Ground Condition

Wind Tunnel Support System Influence on NASA Common Research Model at Low-Speed Conditions

2018 ◽  
Vol 55 (5) ◽  
pp. 1762-1772
Author(s):  
Andreas Waldmann ◽  
Thorsten Lutz ◽  
Ewald Krämer
Keyword(s):  
Wind Tunnel ◽  
Support System ◽  
Research Model ◽  
Tunnel Support ◽  
Low Speed

scholarly journals Analytical solutions and 3D numerical analyses of a shallow tunnel excavated in weak ground: a case from Turkey

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Ebu Bekir Aygar ◽  
Candan Gokceoglu
Keyword(s):  
Support System ◽  
Analytical Solutions ◽  
High Speed ◽  
Support Systems ◽  
Geometric Constraints ◽  
Numerical Analyses ◽  
Silty Clay ◽  
Tunnel Face ◽  
High Speed Railway ◽  
Tunnel Support

AbstractDue to the increasing population and resulting transportation needs, the number of subway and high-speed railway projects has also increased. The geometric constraints of such projects have caused many tunnels to be built in weak ground. Thus, weak ground tunnelling has attracted the attention of tunnel engineers and researchers. The main purposes of this study are to analyse the T4 tunnel excavated in weak ground and to compare the results obtained from the analytical solutions and 3D numerical analyses. This study specifically considers the T4 tunnel support system used in the Ankara İzmir High Speed Railway Project (Afyonkarahisar-Banaz Section). The T4 tunnel route encounters weak ground composed of layers of extremely weak mudstone, clayey sand, weakly cemented sandstone, and silty–clay matrix with pebbles. The tunnel overburden ranges from 10 to 35 m, which is shallow. After the excavation work of the T4 tunnel, severe deformation and critical stability problems in the shallow part (where the overburden is approximately 10 m) were encountered inside the tunnel, leading to a halt in construction. This was followed by revisions to the tunnel support system, leading to successful completion of the tunnel excavation. Numerical simulations of the low overburden section are performed using the commercially available FLAC3D program that uses the finite difference method. The characteristics of insufficient/ineffective support systems and adequate support systems for shallow tunnels excavated through weak ground are discussed in this study. Additionally, problems that pertain to the tunnel itself and its support system are discussed. The results of the 3D numerical analyses and analytical solutions are compared, and the advantages of 3D numerical analyses are discussed. The importance and necessity of tunnel face stability and roof stability for tunnel stability in weak ground is illustrated. Consequently, solutions based on analytical and numerical analyses are presented, and the analysis methodology and solutions proposed in the study can help guide weak ground tunnelling design and evaluation.

Dynamic influence of blasting on primary and secondary tunnel support system

2003 ◽  
pp. 527-531
Author(s):  
Z Ester ◽  
M Dobrilovi_ ◽  
D Vrkljan
Keyword(s):  
Support System ◽  
Tunnel Support
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