A Study of the Process Simulation of Water Burst in a Karst Tunnel Based on Different Seepage Equations
详细信息
- 责任者：Chen Guoqing (State Key Laboratory of Geohazard Prevention & Geoenvironment Protection ; Chengdu University of Technology ; Chengdu 610059 ; China) ; Li Tianbin
- 刊名：Hydrogeology and Engineering Geology
- 出版年：2011
- 卷期：38(4)
- 关键词：岩溶环境 ; karst environment ; 隧道 ; tunnels ; 突水 ; water gushing
- 页码：p.8-13
- 图表：14 illus., 10 refs.
- 分类号：1701
- 出版序号：1278
- issnNo：ISSN1000-3665
- isbnNo：CN11-2202/P
摘要
///Based on Darcy’s law, Brinkman equation and Navier-Stokes (N-S) equations, multi-coupling software is used to simulate water burst process in this paper. Deep aquifer can be expressed using Darcy’s law, the broken zone of excavation is expressed by using Brinkman equation and free face of the tunnel is expressed using by N-S equations in a karst tunnel. Taking the Mingyueshan tunnel as an example, the results show that single fracture flow is small, but the whole complex cross rock fracture is likely to cause water pressure to concentrate. Through the external disturbance, groundwater may flows along the cracks and eventually leads to water burst in a tunnel. The velocity of flow is slow if the fault obtains even small angle with the tunnel, because the fault can play the role in water cut. While with the wide-angle intersection, the fault is not only the role of hydraulic conductivity, but also exacerbates the flow channel.