新建老鲁箐水库蓄水对大尖山隧道的影响研究  

Study on the impact of the newly-built Laoluqing Reservoir on the Dajianshan Tunnel

作　　者：杨可德 缪庆杰 YANG Kede;MIAO Qingjie(Facuity of Civil Engineering and Mechanics,Kunming University of Science and Technology,Kunming Yunnan 650500,China)

机构地区：[1]昆明理工大学建筑工程学院,云南昆明650500

出　　处：《工业安全与环保》2025年第2期63-67,共5页Industrial Safety and Environmental Protection

摘　　要：为定量分析库区蓄水对隧道的影响,以玉-磨铁路大尖山隧道为例,运用地下水渗流计算理论,分析新建老鲁箐水库对大尖山隧道涌水量影响变化规律,利用MIDAS/GTS有限元软件作剖面二维渗流模拟,开展库区蓄水对隧道影响的数值模拟研究。结果表明:理论计算结果显示库区蓄水至校核洪水位后隧道涌水量增加量在35.77%以内。有限元软件计算结果显示库区蓄水前与蓄水至校核洪水位时引起的隧道拱顶位移在1.8 mm以内,变化量为20.9%,隧道水平收敛在1.3 mm以内,变化量为27%;轴力最大部位出现在拱脚处,库区蓄水前后轴力最大的变化幅度为31.7%;弯矩最大部位为墙脚,蓄水前后变化幅度约为10.5%;库区蓄水后最小安全系数为4.3,仍满足规范要求,衬砌处于安全状态。所得结论可为近隧址区修建水库对隧道的影响评价及灾害防治提供理论指导,具有一定的理论和实践意义。To quantitatively analyze the impact of reservoir water storage on tunnels,this study takes the Dajianshan Tunnel of the Yumu Railway as a case.Using groundwater seepage calculation theory,the study examines the impact of the newly constructed Laoluqing Reservoir on the inflow of water into the Dajianshan Tunnel.Two-dimensional seepage simulation is conducted using the MIDAS/GTS finite element software to numerically simulate the effect of reservoir water storage on the tunnel.The results indicate that the theoretical calculation shows that the increase in water inflow into the tunnel after the reservoir reaches the design flood level is within 35.77%.The finite element software calculations reveal that the displacement of the tunnel crown due to water storage is within 1.8 mm,with a change of 20.9%,and the horizontal convergence of the tunnel is within 1.3 mm,with a change of 27%.The maximum axial force is found at the tunnel arch foot,with the largest change in axial force being 31.7%before and after the reservoir is filled.The maximum bending moment occurs at the tunnel wall foot,with a change of approximately 10.5%.After the reservoir is filled,the minimum safety factor is 4.3,still meeting the code requirements,and the lining remains in a safe condition.The conclusions of this study provide theoretical guidance for evaluating the impact of reservoir construction near tunnel sites and disaster prevention,with both theoretical and practical significance.

关 键 词：库区 隧道渗流量 数值模拟 围岩变形 衬砌内力 安全系数 

分 类 号：U451[建筑科学—桥梁与隧道工程] TV697[交通运输工程—道路与铁道工程]