Hazards and treatment of karst tunneling in Qinling-Daba mountainous area: overview and lessons learnt from Yichang–Wanzhou railway system

Fan, Haobo; Zhang, Yuanhang; He, Siyue; Wang, Ke; Wang, Xiuling; Wang, Hao

doi:10.1007/s12665-018-7860-1

Cited by 63 publications

(21 citation statements)

References 69 publications

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“…(4) Research on preventing gas outburst should be undertaken. At present, the method widely used is borehole drainage and a new type of methane drainage device could be developed on the basis of this method Fan et al 2018). (5) Pay attention to the prevention and control of the collapse accident.…”

Section: Resultsmentioning

confidence: 99%

Methane explosion accidents of tunnels in SW China

Fan

et al. 2019

Geomatics, Natural Hazards and Risk

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This Express Letter reports three methane explosion accidents during tunnel construction in Southwest China. In recent years, tunnel construction of China is developing rapidly. The geological conditions of the tunnel passing through are extremely complex, especially, tunnels in coal strata increase rapidly, what's worse, many methane explosions occur during the tunnel construction. The backgrounds, causes and rescue operation of three methane explosion accidents situation are studied. Furthermore, we proposed relevant measures to prevent methane explosions of tunnels. ARTICLE HISTORY

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Section: Resultsmentioning

confidence: 99%

Methane explosion accidents of tunnels in SW China

Fan

et al. 2019

Geomatics, Natural Hazards and Risk

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“…CCM is considered one of the most convenient tools to describe interaction between rock mass and support structure after tunnel excavation. Its principle has been well documented and can be found in literatures of this field and can be referenced in support of acceptable levels of deformation within the tunnel profile [55][56][57]. is method needs to establish three basic curves: (1) longitudinal deformation profile describing relationship between tunnel deformation and distance from tunnel face [58]; (2) ground reaction curve describing the internal pressure and radial displacement of the tunnel; and (3) support reaction curve describing stress-strain behavior of support system [59,60].…”

Section: Preparation For Ccm-based Designmentioning

confidence: 99%

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

Wang

Lai

Garnes

et al. 2019

Advances in Civil Engineering

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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.

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“…Although people have made considerable progress in understanding the mechanical properties of rock mass [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20] and theories and technologies of tunnel excavation and support have been greatly developed [21][22][23][24][25], it still cannot completely contain the occurrence of water and mud inrush. Every year, water and mud inrush still causes a large number of equipment losses and casualties [26]. For fully weathered granite, it is widely distributed all over the world [27,28], with fractures developed and poor water stability [29][30][31].…”

Section: Introductionmentioning

confidence: 99%

Grouting Treatment of Water and Mud Inrush in Fully Weathered Granite Tunnel: A Case Study

et al. 2020

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When mountain tunnel passes through completely weathered granite strata, water and mud inrush is easy to occur, causing casualties and economic losses. Grouting is a common and effective treatment method for water and mud inrush disaster. The current existing researches focus on theoretical analysis, numerical simulation, and laboratory test, and the researches based on the field of engineering application are few. Based on the fully weathered granite tunnel of Junchang tunnel in Guangxi, this paper studies the grouting treatment of water and mud disaster in the fully weathered granite tunnel. This paper first introduces the geological and hydrological conditions of Junchang tunnel in order to understand the causes of water inrush and mud inrush. Then, the treatment method of full-section curtain grouting is introduced. During the grouting, the combination of exploration and injection is adopted. According to different hydrological conditions, different kinds of grouting materials are adopted. After grouting is completed, Transient Electromagnetic Methods, water inflow analysis, borehole investigation, and P-Q-T method are used to evaluate the grouting effect. According to the reaction of the detection results, the weak part of grouting can be supplemented to improve the grouting quality. The results show that the curtain grouting is effective for the treatment of water-mud inrush disaster in the fully weathered granite tunnel. This study provides a reference for the treatment of water and mud inrush in other similar tunnels.

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Hazards and treatment of karst tunneling in Qinling-Daba mountainous area: overview and lessons learnt from Yichang–Wanzhou railway system

Cited by 63 publications

References 69 publications

Methane explosion accidents of tunnels in SW China

Methane explosion accidents of tunnels in SW China

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

Grouting Treatment of Water and Mud Inrush in Fully Weathered Granite Tunnel: A Case Study

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