Numerical analysis of water flow characteristics after inrushing from the tunnel floor in process of karst tunnel excavation

被引：0
作者：
Li S.C. [1 ]
Wu J. [1 ]
Xu Z.H. [1 ]
Li L.P. [1 ]
Huang X. [1 ]
Xue Y.G. [1 ]
Wang Z.C. [1 ]
机构：
[1] Geotechnical and Structural Engineering Research Center, Shandong University, Ji’nan, 250061, Shandong
来源：
Li, S.C. (lishucai@sdu.edu.cn) | 2016年 / Techno-Press卷 / 10期
基金：
中国博士后科学基金; 中国国家自然科学基金;
关键词：
Flow characteristic; Karst tunnel; Optimized escape routes; Pressure; Velocity; Water inrush;
D O I：
10.12989/gae.2016.10.4.471
中图分类号：
学科分类号：
摘要：
In order to investigate water flow characteristics after inrushing in process of karst tunnel excavation, numerical simulations for five case studies of water inrush from the tunnel floor are carried out by using the FLUENT software on the background of Qiyueshan high risk karst tunnel. Firstly, the velocity-distance curves and pressure-distance curves are drawn by selecting a series of probing lines in a plane. Then, the variation characteristics of velocity and pressure are analyzed and the respective optimized escape routes are made. Finally, water flow characteristics after inrushing from the tunnel floor are discussed and summarized by comparing case studies under the conditions of different water-inrush positions and excavation situations. The results show that: (1) Tunnel constructors should first move to the tunnel side wall and then escape quickly when water inrush happens. (2) Tunnel constructors must not stay at the intersection area of the cross passage and tunnels when escaping. (3) When water inrush from floor happens in the left tunnel, if tunnel constructors meet the cross passage during escaping, they should pass through it rapidly, turn to the right tunnel and run to the entrance. (4) When water inrush from floor happens in the left tunnel, if there is not enough time to escape, tunnel constructors can run to the trolley and other equipment in the vicinity of the right tunnel working face. In addition, some rescuing equipment can be set up at the high location of the cross passage. (5) When water inrush from floor happens in the cross passage, tunnel constructors should move to the tunnel side wall quickly, turn to the tunnel without water inrush and run to the entrance. (6) When water inrush from floor happens in the cross passage, if there is not enough time to escape, tunnel constructors can run to the trolley and other equipment near by the left or the right tunnel working face. The results are of important practical significance and engineering value to ensure the safety of tunnel construction. © 2016 Techno-Press, Ltd.
引用
收藏
页码：471 / 526
页数：55
相关论文
共 63 条
[1]  
Chen L.W., Zhang S.L., Gui H.R., Prevention of water and quicksand inrush during extracting contiguous coal seams under the lowermost aquifer in the unconsolidated Cenozoic alluvium — A case study, Arab. J. Geosci, 7, 6, pp. 2139-2149, (2014)
[2]  
Cho J.W., Jeon S., Jeong H.Y., Chang S.H., Evaluation of cutting efficiency during TBM disc cutter excavation within a Korean granitic rock using linear-cutting-machine testing and photogrammetric measurement, Tunn. Undergr. Sp. Tech., 35, pp. 37-54, (2013)
[3]  
Di Q.Y., Wu F.Q., Wang G.J., Tao B., Gong F., An Z.G., Shi K.F., Li Y.X., Wang R., Wang M.Y., Geophysical exploration over long deep tunnel for west route of south-to-north water transfer project, Chinese J. Rock Mech. Eng., 24, 20, pp. 3631-3638, (2005)
[4]  
Do N.A., Oreste P., Dias D., Antonello C., Irini D.M., Livio L., Stress and strain state in the segmental linings during mechanized tunnelling, Geomech. Eng., Int. J., 7, 1, pp. 75-85, (2014)
[5]  
Fahimifar A., Ghadami H., Ahmadvand M., The ground response curve of underwater tunnels, excavated in a strain-softening rock mass, Geomech. Eng, Int. J., 8, 3, pp. 323-359, (2015)
[6]  
Golob R., Stokelj T., Grgic D., Neural-network-based water inflow forecasting, Control Eng. Pract., 6, 5, pp. 593-600, (1998)
[7]  
Hu Y., Yan G., Shi X., Study on physical and numerical simulation of water inrush prediction theory for coal mining above confined aquifer, Chinese J. Rock Mech. Eng., 27, 1, pp. 9-15, (2008)
[8]  
Huang C.H., Feng T., Wang W.J., Liu H., Mine water inrush prediction based on fractal and support vector machines, J. Chinese Coal Soc., 35, 5, pp. 806-810, (2010)
[9]  
Huang H.F., Mao X.B., Yao B.H., Pu H., Numerical simulation on fault water-inrush based on fluid-solid coupling theory, J. Coal Sci. Eng., 18, 3, pp. 291-296, (2012)
[10]  
Islam M.R., Islam M.S., Water inrush hazard in Barapukuria coal mine, Dinajpur District, Bangladesh, Bangl. J. Geol., 24, 1, pp. 1-17, (2005)
1234567