滇中引水工程昆明段松林隧洞涌水量预测研究

Prediction of Water Inflow of Songlin Tunnel in Kunming Section of Yunnan Diversion Project

以云南滇中引水工程昆明段松林隧洞为例,介绍了隧道涌水量预测计算的基本理论和方法。依据地层、地貌、地下水出露特征划分水文地质单元,运用降水入渗系数法、裘布依理论式、佐藤邦明经验公式、佐藤邦明非稳定流系数法、柯斯嘉科夫法、古德曼经验式对隧洞的涌水量进行计算,对隧洞的正常涌水量,最大涌水量进行了综合预测得出涌水量最大的洞段。结合工程实际得出地下水动力学法中的采用裘布依理论式和古德曼经验式分别预测的隧洞正常涌水量和最大涌水量,作为松林隧洞防治处理的依据。

Taking the Songlin Tunnel of Kunming Section of Yunnan-Yunnan Diversion Project as an example,the basic theory and method of forecasting and calculating tunnel water inflow are introduced.In this paper,hydrogeological units are divided according to strata,geomorphy and groundwater outcrop characteristics.The inflow volume of the tunnel is calculated by using precipitation infiltration coefficient method,Joub's theoretical formula,Sato's empirical formula,Sato's unstable flow coefficient method,Kirsjakov's method and Goodman's empirical formula.The tunnel section with the largest water inrush is obtained by comprehensive prediction of the normal water inrush and the maximum water inrush of the tunnel.According to the actual project,the normal and maximum water inflow of the tunnel respectively predicted by Jube’s theory and Goodman's experience in groundwater dynamics method are obtained as the basis for prevention and treatment of the Songlin tunnel.