瓦日铁路太行山隧道嶂石岩地貌区水文地质特征研究

Study on the Hydrogeological features of Taihang Tunnel in Zhangshiyan Landform on Watang-Rizhao Railway

瓦日铁路为我国首条30 t轴重的重载铁路,嶂石岩地貌为我国特有的砂岩地貌。以太行山隧道为工程背景,系统分析嶂石岩地貌水文地质特征,并尝试应用不同涌水量预测方法对比分析预测精度,得出嶂石岩地貌区水文地质具二元结构,Ω套谷、宽张裂隙发育,岩溶泉水二次入渗补给等特征;Ω沟口、地形陡峻带、宽张裂隙发育带富水;宽张裂隙不发育区采用补给区修正大气降水入渗法,Ω套谷、宽张裂隙发育区采用补给模数修正地下水动力学法对涌水量进行预测,可信度较高。研究所得结论对嶂石岩地貌区水文地质分析及隧道涌水量预测具一定的参考价值,可供同类工程借鉴。

Watang-Rizhao Railway is the fist heavy haul railway of 30 ton axle load in China and Zhangshiyan landform is a typical sandstone landform in China. This paper,with reference to Taihang Mountain Tunnel,systematically analyzes the hydrogeological features of zhangshiyan landform,andaddresses the prediction accuracy based on different water inflows. The results show that the hydrogeology in the Zhangshiyan landform isfeatured by binary structure,Ω sets of valleys,wide crack development and secondary infiltration recharge of karst springs; the Ω trench,steep terrain area and wide crack development are rich in water;and it is of high credibility to use recharge area to amend atmospheric precipitation infiltration method in wide crack non-development zone,and to use replenishment module to correct groundwater dynamic method in Ω sets of valleys and wide crack development zone. The conclusions of the study are of certain reference value for the hydrogeological analysis and prediction of the water inflow in tunnels of similar projects.