摘要
以既有水库扩建工程为背景,通过遥感解译、现场调查、物探和钻探,查明水库与铁路间的地质条件,采用FEFLOW三维有限元地下水流模拟软件进行地下水数值模拟,预测水库扩建后对隧道渗流场的影响,主要结论如下:(1)进行渗流场数值模拟计算前,采用勘探钻孔的地下水位模型验证,可提高数值模拟计算精度;(2)水库扩建后正常蓄水条件下,乐成隧道最大水位抬升高度为5.34 m,包山隧道为14 m;设计洪水蓄水条件下,乐成隧道最大水位抬升高度为6.62 m,包山隧道为17.3 m;(3)乐成隧道DK41+650~出口段及包山隧道DK42+600~DK43+350段为水位主要抬升段落,需重点校核隧道结构。
Taking the existing reservoir expansion project as the background,the geological conditions between the reservoir and the railway were identified through remote sensing interpretation,on-site investigation,geophysical exploration,and drilling.The FEFLOW three-dimensional finite element groundwater flow simulation software was used for groundwater numerical simulation to predict the impact of reservoir expansion on tunnel seepage field.The main conclusions are as follows:(1)Before conducting numerical simulation calculation of seepage field,the groundwater level model of exploration drilling is used to verify,which can improve the accuracy of numerical simulation calculation.(2)After the expansion of the reservoir,under normal water storage conditions,the maximum water level rise height of Lecheng Tunnel is 5.34 m,and that of Baoshan Tunnel is 14 m.Under the design flood storage conditions,the maximum water level rise height of Lecheng Tunnel is 6.62 m,and that of Baoshan Tunnel is 17.3 m.(3)The DK41+650~exit section of Lecheng Tunnel and the DK42+600~DK43+350 section of Baoshan Tunnel are the main sections of water level rise,and the tunnel structure needs to be carefully checked.
作者
李仰波
LI Yangbo(China Railway Siyuan Survey and Design Group Co.Ltd.,Wuhan Hubei 430000,China)
出处
《铁道建筑技术》
2025年第12期218-222,共5页
Railway Construction Technology
基金
中铁第四勘察设计院集团有限公司科技研究开发计划项目(2020K039)。
关键词
水库扩建
邻近铁路
隧道水文地质
数值模拟
reservoir expansion
adjacent railway
hydrogeology of tunnel
numerical simulation
