摘要
长大深埋隧道穿越富水地质环境时,易造成区域水环境变化。拟建运三铁路中条山隧道要穿越多条断层破碎带,地层含水量较大,地质条件复杂。采用GMS地下水模拟软件,构建了隧址区三维水文地质结构模型,模拟预测隧道建设施工与运行期的地下水流场分布及恢复情况。结果表明:运三铁路隧道建设排水会形成沿隧道轴线的降落漏斗,区域地下水位平均降深20~40m,最大降深达200m,3年建设期造成水量损失6.2×10^(6)m^(3)。隧道运行稳定排水后,地下水流场可在1年时间内恢复至初始形态,区域流场10年后基本恢复,但隧道周边仍存在约30m的降落漏斗,水资源量将恢复至建设前水平。数值模拟较好地揭示了长大深埋铁路隧道地下水涌水量、影响范围、恢复周期等规律,可为拟建运三铁路中条山隧道的水环境效应评价、恢复与防治提供科学支撑。
Deeply-buried long railway tunnels crossing water-rich geological places will bring changes to the regional water environment.The planned Zhongjianshan tunnel of Yunsan High-speed Railroad will have to cut through several fault broken zones with large water content in the strata and complex geological conditions.The GMS groundwater simulation software is used to construct a three-dimensional hydrogeological structure model of the tunnel area to simulate and predict the distribution and recovery of the groundwater flow field during the period of tunnel construction and post-operation.The results show that the drainage of Yunsan Railway tunnel construction forms a landing funnel along the tunnel axis,and the regional groundwater level has an average drawdown of 20~40m,with a maximum drawdown of 200m,causing a water loss of 6.2×10^(6)m^(3)during the 3-years construction period.After the tunnel operation and stable drainage,the groundwater flow field can be restored to its initial form within one year,and the regional flow field will be basically restored in 10 years,but there will still be left a landing funnel of about 30m around the tunnel,and the water resources will be restored to the pre-construction level.The numerical simulation reveals the laws of groundwater influx,influence range and recovery cycle of the long deeply-buried railroad tunnel,which can provide scientific support for the evaluation of water environment effect,recovery and prevention of the planned Zhongjiangshan Tunnel of Yunsan railway.
作者
郭晓亮
辛民高
冯振
GUO Xiaoliang;XIN Mingao;FENG Zhen(China Railway Design Group Co.Ltd.,Tianjin 300308,China;China Institute of Geo-environmental Monitoring,Beijing 100081,China)
出处
《防灾科技学院学报》
2023年第3期39-50,共12页
Journal of Institute of Disaster Prevention
基金
中国铁设科技开发课题(2020YY340408)。
关键词
深埋铁路隧道
地下水流场
降落漏斗
地下水恢复
数值模拟
deeply-buried railway tunnel
groundwater flow field
landing funnel
groundwater restoration
numerical simulation
