Influence of drainage on karst groundwater at an existing tunnel in the east-spring mountains, Chongqing
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摘要: 岩溶水径流路径非常复杂，而隧道疏排对岩溶水的影响更是一个长期复杂的过程。在长期观测数据以及实地调查研究的基础上，分析重庆东温泉山既有隧道疏排对岩溶水的影响，总结出水平流动带内隧道疏排岩溶水形成的降落漏斗一般可达到隧道标高附近，岩溶裂隙水带内隧道疏排岩溶水形成的降落漏斗仍保持在隧道上方一定高度，渗透性是隧道疏排对岩溶水影响的关键因素。Abstract: The path of karst groundwater runoff is very complex, and the influence of tunnel drainage on karst groundwater is a long and complex process. Based on long-term observation data and site investigations, this paper analyzes the influence of existing tunnel drainage on karst groundwater in the east-spring mountains of Chongqing. It is concluded that the cone of depression formed by the drainage of karst groundwater from the tunnel in the horizontal flow zone can generally reach the elevation of the tunnel, while that in the tunnel in karst fractured zone remains at a certain height above the tunnel. Permeability is the key influencing factor of tunnel drainage on karst groundwater. The research results would be helpful to the selection of routes in karst areas and analysis of the influence of tunnel drainage on karst groundwater.
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Key words:
- east-spring mountains /
- tunnel drainage /
- karst groundwater /
- influence analysis
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