Construction risks of Huaying mount tunnel and countermeasures
Haibo YAO1(), Feng GAO2, Shigang YU3, Wei DANG4
1. Civil Engineering School of North China University of Technology, Beijing 100144, China 2. Branch No.1 of Sinohydro 7 Co., Ltd, Sichuan 620800, China 3. Branch No.3 of Sinohydro 7 Co., Ltd, Sichuan 611700, China 4. Sinohydro Engineering Bureau No.4 Co. Ltd, Beijing 100073, China
The Chongqing-Guang’an motorway is planned to cross Huaying mount at Jingguan town of Chongqing city. The whole mount is a colossal anticline whose core is consisted of coal measure strata (upper Permian Longtan formation P2l) and the limbs are limestone strata (middle Triassic Leikoupo formation T2l and lower Triassic Jialingjiang formation T1j). The tunneling is full of risks of collapse, gas explosion or gas outburst, water (mud) inrush, gas inrush because of existence of faults, high pressure gas, karst tectonics and coal goafs around the tunnel. In order to cope with the high risk, two main countermeasures were taken to ensure security of construction. One is geology prediction, and the other is automatic wireless real-time monitoring system, which contains monitoring of video, wind speed, poisonous gas (CH4, CO, H2S, SO2), people location, and automatic power-off equipment while gas contents being more than warning threshold. These ascertained the engineering safety effectively.
Jiang L, Yi Y, Yang X, Tao W. The calamity of the water and mud-rock pouring up from karst and the choosing of the renovate schemes at east wing of the Dongmaling anticline in the Yuanliangshan Yuhuai railway tunnel. Advance in Earth Sciences, 2004, 19: 340–345
2
Li C, He F, DingJ. Synthesis prediction technology of karst geology in Wulong tunnel. Hydrogeology and Engineering Geology, 2005, 2: 96–100
3
Gu Y, Li X, Du Y, Kang Y. Treatment of the mud break out from wall rock at K21+ 780 in Tongyu tunnel. Chinese Journal of Underground Space and Engineering, 2005, 1(5): 743–745
4
Wang D, Chen X, Zhu D, Tian K. Formation conditions and spatial distibution of geo-hazads in southen urban agglomeation Of Chengdu-Chongqing economic zone. Journal of Geometry, 2016, 22(3): 696–705
5
Wang J, Chen L, Wang C. Analysis of the water inflow in the new Longfeng tunnel on the Lanzhou-Chongqing railway. Modern Tunnelling Technology, 2012, 345: 42–45
6
Lin B, Zhai C. Mechanism of gas explosion in coal exploitation and its preventive measures. Journal of Mining & Safety Engineering, 2006, 23(1): 19–23
7
Yang Y, Meng J, Wang T, Gao Y. Causes analysis of gas explosion accident happened in working face. Journal of China Coal Society, 2007, 32(7): 734–736
8
Yu H, Wu J. Study on control technology for mine gas explosion. Coal Technology, 2010, 29(10): 85–87
9
Yang Y, Meng J, Wang T. Discussion on mechanism of explode in working face. Journal of China Coal Society, 2002, 27(6): 636–638
10
Lin B, Zhou S, Zhang R. Influence of barriers on flame transmission and explosion wave in gas explosion. Journal of China University of Mining& Technology, 1999, 28(2): 104–107
11
Lin B. Measurement and analysis of dynamics feature parameter in gas explosion. 2002, 27(2): 164–167
12
Li R, Shi S, Luo W. Research on cross-coupling characteristics and laws of gas explosion accidents in coal mines. China Safety Science Journal, 2010, 2(2): 69–74
13
Wang H, Cao T, Zhou X, Tan G, Xie J, Jiang W. Research and application of attenuation law about gas explosion shock wave in coal mine. 2009, 34(6): 778–782
14
Li X, Wang Q, Hong Y, Yan H, Liu D. Tectonics control on coal measures in Donghuantuo coalmine, Kailuan mining area. Coal Geology of China, 2008, 20(10): 42–44
15
Wang H. Comprehensive advance geology prediction adopted in yuanliangshan tunnel. Modern Tunnelling Technology, 2004, 41(3): 55–61
16
Wu H, Hou X, Cao X. Analysis and discussion about improving the tsp geology forecast accuracy. Chinese Journal of Underground Space and Engineering, 2015, 11(2): 484–490
17
Li H, Li F, Lu G, He X. Application of combining tsp method and GPR to the advanced forecast of geology in tunnel. Geotechnical Investigation & Surveying, 2009, 7, 86–90
18
Wei N, Yin H, Liu X, Hua G. Design of gas monitoring system of coal mine based on wireless sensor networks. Industry and Mine Automation, 2010, 1: 70–73
19
Li J, Liu Q, Zhiguo Z, Cao S. Methane gas monitoring system in mine based on wireless sensor networks. Instrument Technique and Sensor, 2013, 9: 73–76
20
Technical Code For Railway Tunnel With Gas, TB10120-2002. 2002
21
Lu S, He J, Yu C, Qin Y. Mechanism of gas explosion suppression by water. Journal of China Coal Society, 1998, 23(4): 417–421
22
Gou B. Discussion on control and prevention measures for gas tunnels. Modern Tunneling Technology, 2011, 48(2): 20–27
23
Du W, Wu J, Wang Y. Outfit and explosion-proof remold of construction equipment for a double-track railway tunnel with gases. Modern Tunneling Technology, 2011, 48(2): 164–177
