摘要
在富水位地区建设特长隧道中通常会发生涌水灾害,因此准确预测隧道涌水量能科学指导隧道的设计和施工。新建关山隧道处于关山褶皱带,地下水循环强烈,岩体节理发育,对工程施工的安全影响较大。基于此,文章对关山隧道水文地质情况进行分析,采用不同涌水量计算方法对隧道各研究区段涌水量进行预测。通过对比分析,发现地下径流模数法预测结果较为符合实际。同时,采用FLAC3D软件对关山隧道各区段进行了平面涌水模拟,并对地下水位线高度进行了反演分析,获得了与实际相符的地下水位线高度。然后,根据反演得到的参数对关山隧道施工涌水量进行三维数值模拟预测,获得的施工涌水量可为实际工程提供参考。
Water inflow disasters usually occur in the construction of super-long tunnels in water-rich areas.Therefore,accurate prediction of water inflow in the tunnel can give a scientific guidance for design and construc⁃tion of the tunnels.New Guanshan tunnel is located in the Guanshan fold belt,where groundwater circulation is pow⁃erful as well as rock joints and fissures are developed,having a greater impact on the safety of tunnel construction.In this paper,hydrogeological conditions of Guanshan tunnel are analyzed and different water inflow calculation methods are adopted to predict the water inflow in each studied section of the tunnel.It is found from the compara⁃tive analysis that the prediction result by the underground runoff modulus method is more practical.Meanwhile,FLAC3D software is used to simulate the water inflow in each section of Guanshan tunnel,and the groundwater level is inversely analyzed to obtain a groundwater level consistent with the actual situation.Then,according to the param⁃eters obtained from the inversion,a three-dimensional numerical simulation is performed to predict the water inflow during the construction of Guanshan Tunnel,and the obtained water inflow could be used as a reference for the actu⁃al situation.
作者
周文俊
Zhou Wenjun(China Railway First Survey and Design Institute Group Co.,Ltd.,Xi′an 710043)
出处
《现代隧道技术》
EI
CSCD
北大核心
2021年第2期22-30,共9页
Modern Tunnelling Technology
关键词
特长隧道工程
褶皱带
地下径流模数法
FLAC3D软件
平面涌水模拟
反演分析
三维数值模拟
Super-long tunnel
Fold belt
Underground runoff modulus method
FLAC3D software
Plane water-in⁃flow simulation
Inverse analysis
Three-dimensional numerical simulation
