黄土地区铁路建设项目对地下水环境的影响研究

摘要

在我国西北地区,铁路项目的隧道工程越来越多,其对黄土含水层的地下水环境影响受到关注.为减轻隧道工程对地下水环境的影响,保证当地居民正常的生活用水及生态用水,以穿越黄土地区的铁路项目南惠隧道为例,在现场调查的基础上,介绍该隧道工程线路附近区域的水文地质条件及隧道外环境现状,重点分析该隧道工程的建设对线位附近地表水库、两侧村民饮用水井及对隧道洞顶植被可能产生的影响,并结合工程的具体情况,提出相应的环境保护措施,确保工程对地下水环境的影响降到最低.并对同类隧道工程给出工程环保选线上的一些建议.%In the northwestern region of China,tunnel projects are getting more and more in railway engineering and their impact on the groundwater environment of loess aquifers attracts much attention.To reduce the impact of tunneling on the groundwater environment and ensure water supply for local residents and ecological water utilization,possible impacts of tunneling on the surface of the reservoir near the railway line,on the drinking water wells for the villagers near the two sides of the railway line and on the vegetation on top of the tunnel are analyzed based on field investigations.The hydrogeological conditions and the surroundings of the tunnel near the project line are presented.With reference to the specific circumstances of the project,corresponding environmental protection measures are put forward to minimize the impact of the project on the groundwater environment and some suggestions are offered for route selection of similar tunnel projects.