基于数值模拟的隧洞施工排水地下水影响评价  

Groundwater Impact Analysis of Tunnel Engineering Water Discharge by Using Numerical Model

作　　者：张丽[1] ZHANG Li(Shanxi Water Conservancy Vocational and Technical College,Taiyuan 030032,Shanxi Province,China)

机构地区：[1]山西水利职业技术学院,山西太原030032

出　　处：《中国农村水利水电》2024年第2期37-43,共7页China Rural Water and Hydropower

基　　金：山西省重点研发计划项目(202202090301022)。

摘　　要：由于自然条件的改变和人类活动的影响,岩溶泉域出现断流或衰减、区域水位趋势性下降以及水质持续恶化等诸多环境和地质问题,研究隧洞工程施工排水对泉域地下水的影响对于泉域生态环境保护十分必要。依托山西某工程深部隧洞穿越柳林泉域,构建了隧洞工程所在泉域的地下水数值模拟模型(采用MODFLOW软件开发盆地地下水模型),根据地下水长期观测井数据,对模型及相关参数进行验证和率定,通过模型模拟刻画出地下水系统补给、径流和排泄特征,分析工程前期施工以及后期排水对岩溶水水位动态、泉流量的影响以及可恢复性。研究成果表明,由于枝柯-车鸣裕泉域含水层地下水库的调蓄作用,前期和后续施工排水对柳林泉水补给量的影响较小;对枝柯泉域和车鸣裕泉域的区域地下水水位影响明显,预估到2025年底,枝柯镇北部形成降落漏斗。研究方法及成果对其他泉域生态环境保护具有参考价值。Because of the change of natural conditions and the influence of human activities,there are many environmental and geological problems,such as cut-off or attenuation,regional water level decline and water quality deterioration in the karst groundwater,it is necessary to study the impact of tunnel construction drainage on groundwater in the spring area for the protection of the ecological environment in the spring area.Based on the deep tunnel of a project in Shanxi through the Liulin springs area,the numerical model of groundwater in the springs area where the tunnel project is located is constructed(the numerical model of groundwater of the basin is developed by using the MODFLOW software).Based on the long-term observation well data of groundwater,the model and related parameters are verified and calibrated,and the characteristics of recharge,runoff and discharge of groundwater system are described by model simulation,this paper analyzes the impact and recoverability of early construction and later drainage on the karst water level dynamics and springs flow.The research results show that due to the storage effect of the aquifer underground reservoir in the Zhike-Chemingyu springs area,the early and subsequent construction drainage has less impact on the supply of Liulin springs and has a significant impact on the regional groundwater level in the Zhike Springs Area and the Chemingyu Springs Area,it is estimated that by the end of 2025,a landing funnel will be formed in the north of Zhike Town.The research methods and results have a reference value for the ecological environment protection of other springs areas.

关 键 词：地下水模型 岩溶泉域 排水影响 

分 类 号：TV138[水利工程—水力学及河流动力学] P641[天文地球—地质矿产勘探]