玉京山隧道工程地下水环境影响预测及保护措施研究
发布时间：2019-04-19 06:48
【摘要】：隧道工程修建于地壳表层,位于地下水最为活跃的部位。隧道的开挖,极有可能使其四周特别是上部地质内的地下水和地表水在此汇集,或者形成新的排泄通道,进而影响地下水的分布格局,对当地地下水环境产生一定的影响。若在隧道施工过程中,肆意排放地下水而不对其进行封堵,将会使地下水水量减少、水位下降,使得一定深度内的地下水甚至地表水被疏干,这将造成影响半径范围内的地下水露头减少,导致井泉、溶洞、暗河以及与地下水密切相连的地表水体等的水量不同程度的减小或消失,直接或间接影响当地居民的生活、生产。玉京山隧道作为成贵铁路乐山至贵阳段的重点隧道,其隧顶及两侧除分布有井、泉、暗河、溪沟外,作为饮用水源的扎西水库和后山饮水工程水源点也在其附近。本文拟分析预测该隧道开挖对地下水环境的影响以提出切实可行的保护措施。论文首先在现场踏勘、收集资料的基础上,对隧道的工程地质、水文地质、岩溶发育情况及水源点概况进行分析,并采用地下径流模数法和大气降水入渗法对隧道的涌水量进行了预测,同时在Modflow地下水数值模拟软件的支持下,对隧址区地下水渗流场进行模拟,得出了隧道施工期间的疏干排水影响半径：D3K278+010～D3K279+740段最大影响半径为806.6m; D3K279+740～D3K280+720段最大影响半径为1773.1m; D3K280+720～D3K282+120段最大影响半径为7513m;D3K282+120～ D1K285+012段最大影响半径为2006.2m。扎西水库和后山饮水工程水源点均在影响半径之内。针对此影响,本文提出了保护措施,最终设计出一套适用于本隧道的地下水监控方案,以期给类似涉及饮用水源的岩溶隧道以参考。
[Abstract]:The tunnel project is built on the surface of the earth's crust and is located in the most active part of the ground water. The excavation of the tunnel is likely to bring the groundwater and surface water around the tunnel, especially in the upper part of the tunnel, together, or form a new drainage channel, which will affect the distribution pattern of groundwater and have a certain impact on the local groundwater environment. In the course of tunnel construction, if groundwater is discharged indiscriminately without blocking it, the groundwater quantity will be reduced, the water level will be lowered, and the groundwater and even the surface water in a certain depth will be drained. This will result in the reduction of groundwater outcrops within the radius of influence, resulting in the reduction or disappearance of the volume of water in wells, caves, dark rivers and surface water bodies closely connected to groundwater to varying degrees, directly or indirectly affecting the lives of the local population, Production. Yujingshan Tunnel is a key tunnel between Leshan and Guiyang of Chenggui Railway. Besides well, spring, dark river and Xigou, the water source point of Zaxi Reservoir and Houshan drinking Water Project, which is a drinking water source, is also near the top and both sides of the tunnel. In this paper, the influence of tunnel excavation on groundwater environment is analyzed and predicted in order to put forward practical protection measures. Firstly, on the basis of on-the-spot survey and data collection, this paper analyzes the engineering geology, hydrogeology, karst development and the general situation of water source points of the tunnel. The underground runoff modulus method and precipitation infiltration method are used to predict the tunnel water inrush. At the same time, with the support of Modflow groundwater numerical simulation software, the groundwater seepage field in the tunnel area is simulated. The influence radius of drainage during tunnel construction is obtained: the maximum influence radius of D3K278 010~D3K279 740 section is 806.6m; The maximum influence radius of D3K279 740~D3K280 720 segment is 1773.1m, and the maximum influence radius of D3K280 720~D3K282 section is 7513m, D3K282 120 ~ D1K285 012 section is 2006.2 m. The water source points of Zaxi Reservoir and Houshan drinking Water Project are within the radius of influence. In view of this effect, this paper puts forward protection measures, and finally designs a set of groundwater monitoring scheme suitable for this tunnel, in order to provide reference for karst tunnels similar to those involving drinking water sources.
【学位授予单位】：西南交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P641.8
本文编号：2460695
[Abstract]:The tunnel project is built on the surface of the earth's crust and is located in the most active part of the ground water. The excavation of the tunnel is likely to bring the groundwater and surface water around the tunnel, especially in the upper part of the tunnel, together, or form a new drainage channel, which will affect the distribution pattern of groundwater and have a certain impact on the local groundwater environment. In the course of tunnel construction, if groundwater is discharged indiscriminately without blocking it, the groundwater quantity will be reduced, the water level will be lowered, and the groundwater and even the surface water in a certain depth will be drained. This will result in the reduction of groundwater outcrops within the radius of influence, resulting in the reduction or disappearance of the volume of water in wells, caves, dark rivers and surface water bodies closely connected to groundwater to varying degrees, directly or indirectly affecting the lives of the local population, Production. Yujingshan Tunnel is a key tunnel between Leshan and Guiyang of Chenggui Railway. Besides well, spring, dark river and Xigou, the water source point of Zaxi Reservoir and Houshan drinking Water Project, which is a drinking water source, is also near the top and both sides of the tunnel. In this paper, the influence of tunnel excavation on groundwater environment is analyzed and predicted in order to put forward practical protection measures. Firstly, on the basis of on-the-spot survey and data collection, this paper analyzes the engineering geology, hydrogeology, karst development and the general situation of water source points of the tunnel. The underground runoff modulus method and precipitation infiltration method are used to predict the tunnel water inrush. At the same time, with the support of Modflow groundwater numerical simulation software, the groundwater seepage field in the tunnel area is simulated. The influence radius of drainage during tunnel construction is obtained: the maximum influence radius of D3K278 010~D3K279 740 section is 806.6m; The maximum influence radius of D3K279 740~D3K280 720 segment is 1773.1m, and the maximum influence radius of D3K280 720~D3K282 section is 7513m, D3K282 120 ~ D1K285 012 section is 2006.2 m. The water source points of Zaxi Reservoir and Houshan drinking Water Project are within the radius of influence. In view of this effect, this paper puts forward protection measures, and finally designs a set of groundwater monitoring scheme suitable for this tunnel, in order to provide reference for karst tunnels similar to those involving drinking water sources.
【学位授予单位】：西南交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P641.8
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