南太行隧道区域泉域特征及隧道水文分析

Analysis of Regional Spring Basin Characteristics and Hydrological Conditions of Southern Taihang Tunnel

研究目的:太原至焦作城际铁路于晋豫省界以南太行隧道越岭,区内奥陶系、寒武系碳酸盐岩建造发育,岩溶地下水条件复杂。为研究南太行隧道水文地质特征,准确预测隧道施工水文条件,本文主要分析区内三姑泉域、延河泉域及其他散泉泉域的地貌特征、构造联系、岩性特点、泉域水位及补给、径流、排泄条件等。研究结论:(1)三姑泉域、延河泉域及其他散泉泉域的水文条件与隧址地貌特点、地层岩性条件相似,泉域水文对隧道建设有一定影响;(2)隧道修建虽不受地表径流影响,但区内地下水储量相对较大,隧道修建切断了地下水渗流通道,导致部分段落涌水量预计较大,需采取堵排结合的措施,避免引起环境水文问题;(3)该研究结论对隧道工程施工、区域水文研究有一定的参考价值。

Research purposes： Taiyuan to Jiaozuo intereity railway crosses the region of Shanxi and Henan Province by southern Taihang tunnel, in which Ordovician and Cambrian carbonate rock form conditions are complex. To study hydrogeologieal characteristics of southern Taihang and develop, karst groundwater tunnel and accurately predict the hydrological conditions of tunnel construction, this paper analyzed the geomorphic features, tectonic contact, lithologic characteristics, spring water level and recharge, runoff and discharge conditions of Sangu spring basin, Yanhe spring basin and other scattered springs basins. Research conclusions： （ 1 ） The hydrological conditions of Sangu spring basin, Yanhe spring basin and other scattered springs basins are similar to geomorphic features and lithologic conditions of southern Taihang tunnel, the spring basin hydrology has influence on the tunnel construction. （2） The tunnel construction is not affected by surface runoff, but groundwater storage is much larger, and tunnel construction will cut off the groundwater seepage channel, leading to larger water inflow, so need to take the measures of combination of water plugging and drainage to avoid causing hydrological environment problems. （3） The research results have has certain reference value for tunnel construction and regional hydrology research.