| 峡口隧道间歇性岩溶涌突水过程及来源解析 |
| |
| 引用本文： | 罗明明,周宏,郭绪磊,陈乾龙,齐凌轩,况野.峡口隧道间歇性岩溶涌突水过程及来源解析[J].地质科技通报,2021,40(6):246-254. |
| |
| 作者姓名： | 罗明明 周宏 郭绪磊 陈乾龙 齐凌轩 况野 |
| |
| 基金项目： | 国家自然科学基金项目41807199中国地质调查局项目12120113103800中国地质调查局项目DD20190824湖北交投集团委托项目2020296639 |
| |
| 摘 要： | 岩溶涌突水问题勘察与防治一直是隧道工程建设面临的难题。峡口隧道有着较长的岩溶涌突水历史，为了查明间歇性涌突水来源，探究岩溶水系统结构对涌突水过程的控制作用，综合利用水文地质调查、水文学和水文地球化学等方法对涌突水来源和过程进行了识别与分析。结果表明:在研究区孟家陵一带存在地下水分水岭，北部和南部的地下水分别向响龙洞和峡口洞排泄。在集中涌水事件中，次涌水总量与次降雨量具有显著的线性正相关关系，集中涌水与4条盲沟排水在水文地球化学特征上具有同源性，均来自于隧道北部的岩溶水；在隧道稳定排水期间，右洞北侧盲沟主要排泄隧道北部的岩溶水，其他3处盲沟排水则主要来源于碎屑岩裂隙水；集中涌水点位于峡口岩溶水系统的饱水带附近，强降雨导致隧道上方整体处于充水状态，涌水点截断了岩溶通道的快速流而发生涌突水，并且混合了小比例的基流。在岩溶涌突水问题研究中，综合利用多技术方法和多信息渠道验证可提高涌突水来源分析的准确性。
|
| 关 键 词： | 峡口隧道 岩溶 涌突水 来源识别 |
| 收稿时间： | 2021-02-28 |
Processes and sources identification of intermittent karst water inrush in Xiakou Tunnel |
| |
| Abstract: | The investigation and prevention of karst water inrush is a difficult problem in tunnel construction. The Xiakou Tunnel has a long history of karst water inrush.To identify the source of intermittent water inrush and explore the controlling effect of karst water system to the process of water inrush, the hydrogeological survey, hydrological and hydrogeochemical methods were used to identify the sources and processes of water inrush. The results show that, there is a groundwater divide at the area of Mengjialing, and the groundwater in the northern and southern area discharge into Xianglongdong and Xiakoudong, respectively. In the events of concentrated water inrush, the total amount of event water inrush has a significant linear positive correlation with the rainfall event, and the hydrogeochemical composition of the water inrush is very similar to that of the four blind drainage ditches, which indicates that all these water inrushes and blind drainage ditches come from the karst water in the northern part of the tunnel. During the stable drainage period, the karst water in the northern part of the tunnel is mainly discharged through the blind drainage ditch on the north of the right tunnel, while the groundwater of other three blind drainage ditches come from the fissure water in clastic rock.The concentrated water inrush point is located on the surface of saturated zone in the karst water system of Xiakou. The heavy rainfall events made the upper part of tunnel to be filled with karst water.The water inrush was caused by intercepting the fast flow in karst channel, and small part of base flow was mixed into the water inrush. In the study of karst water inrush, the comprehensive utilization of multi-technical methods and multi-information verifications can improve the accuracy in the source identification of water inrush. |
| |
| Keywords: | |
|
| 点击此处可从《地质科技通报》浏览原始摘要信息 |
|
点击此处可从《地质科技通报》下载全文 |
|
