田德铁路百安隧道涌水量预测方法探讨

Discussion on the Method of Forecasting the Water Yield of BaiAn Tunnel in TianDe Railway

田德铁路百安隧道穿过桂西南岩溶强烈发育的峰丛洼地带,隧道位于岩溶垂直入渗带内,具有枯水季节隧道内涌水较小,暴雨后涌水量大,隧道通过洼地段发生突水可能性较大的特点。预测隧道开挖后涌水量的大小,除需掌握区域水文地质特征外,还必须合理选择水文地质参数。准确预测隧道涌水量大小及隧道可能突水段落,可为工程设计提供较为准确的参数,预防隧道涌水危害。

BaiAn Tunnel of the Tiande Railway goes through Karst vegetation in southwest Guangxi. The tunnel is located in the vertical percolating zone, it has the feature of little yield in low water season and great yield in rainstorm season. The bottomland of tunnel is likely to have water outhurst. In order to predict the water yield after excavating the tunnel, We must have know the hydrogeology and engineering geology characteristics, and select the reasonable hydrologic parameter. The method provides with the accurate parameter, so the engineers can give preventive measures of tunnel water outburst.