摘要
为研究复杂地质条件下水库蓄水对既有隧道稳定性的影响,以潮惠高速公路某区段隧道为依托,采用有限元数值模拟方法,对比分析了无优化措施与施加止水帷幕措施的情况下,水库蓄水对既有隧道结构及渗流的影响。结果表明:采用加固措施下,水库蓄水后隧道个别部位不能满足规范设计要求,地下水渗流对隧道产生影响较大,需采取必要的加固防护措施;在采用止水帷幕及趾板加固的优化措施后,隧道拱顶位移、轴力、弯矩较前者相比分别降低18.40%、31.52%、29.80%,降幅明显,同时孔隙水压力及渗流流量显著减小,较前者相比分别降低约40%与20%。
In order to study the effect of reservoir storage on the stability of existing tunnels under complex geological conditions,a finite element numerical simulation method is used to compare and analyse the effect of reservoir storage on the existing tunnel structure and seepage without optimisation measures and with the application of water curtain measures.The results show that with the use of reinforcement measures,some parts of the tunnel cannot meet the design requirements after reservoir storage,and groundwater seepage has a greater impact on the tunnel,requiring necessary reinforcement and protection measures;with the use of water curtain and toe plate reinforcement optimization measures,the tunnel vault displacement,axial force and bending moment are reduced by 18.40%,31.52%and 29.80%respectively compared to the former,which is a significant reduction.At the same time,the pore water pressure and seepage flow are significantly reduced,by approximately 40%and 20%respectively compared to the previous measures.
作者
高洋
王万平
刘云雨
邱军领
赖金星
冀成
GAO Yang;WANG Wan-ping;LIU Yun-yu;QIU Jun-ling;LAI Jin-xing;JI Cheng(School of Highway,Chang'an University,Xi'an 710062,China;CCCC First Highway Consultants Co.Ltd.,Xi'an 710068,China)
出处
《公路》
北大核心
2024年第4期369-377,共9页
Highway
基金
国家自然科学基金面上项目,项目编号51978066,52278393
陕西省重点研发计划项目,项目编号2023-YBSF-511。
关键词
公路隧道
水库蓄水
止水帷幕
渗流
数值模拟
road tunnels
reservoir storage
water-resisting curtain
seepage
numerical simulation
