秀山隧道水文地质特征分析研究

Research on the Hydrogeology Characteristics of Xiushan Tunnel

研究目的:玉蒙铁路秀山隧道受云南特殊地质构造影响和异常活跃的地壳运动作用,溶蚀管道与宽大裂隙发育,岩溶水、构造裂隙水相互混杂并形成复杂的地下水网络系统。通过对隧址区域工程地质与水文地质条件以及施工开挖揭示的洞身涌水特征进行系统分析研究,查清隧道涌水来源及其与杞麓湖的水力联系。研究结论:(1)通过对隧道洞身涌水量最大段落进行综合分析及水样同位素测试,表明地下水来源于隧址区接受的大气降水;(2)杞麓湖湖水与隧址区地下水在来源上存在明显差异,隧道涌水与湖水联系较弱;(3)隧道穿越曲江、杞麓湖两个水文地质单元,施工至不同洞段水文地质特征表现出较大的差异性;(4)本文研究结论可为同类地质环境隧道工程勘察设计施工提供参考借鉴。

Research purposes： Xiushan Tunnel is in a complex groundwater network system, which is influenced by peculiar geological structure in Yunnan Province and unconventionality active crustal movement, karst conduit and wide fracture developed, and karst water and tectonic crack water mixed. Through the research of engineering geological and hydro -geological conditions and the gushing water characteristic in tunnel excavating, find out the hydraulic connection between the gushing water source and Qilu Lake. Research conclusions： （ 1 ） The section of largest gush of water in tunnel has been compositively analysed, and water isotope test has been adopt, which present the groundwater is from the meteoric water of tunnel area. （2） The source of groundwater in the tunnel sit and Qilu Lake is evidently difference, and the hydraulic connection between the gushing water and Qilu Lake is slight. （3）The tunnel passes through Qujiang River hydrogeology unit and Qilu Lake hydrogeology unit, and the great difference of hydrogeology characteristic has been expressed in different section of tunnel construction. （4） This paper aims to summarize experience, and affords reference for investigation, design and construction of other tunnels on analogous geological conditions.