| 武汉两湖隧道岩溶水系统结构及水循环规律 |
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| 引用本文： | 马超,曾斌,罗明明,权锋,於李军,李期佳,代昂.武汉两湖隧道岩溶水系统结构及水循环规律[J].地质科技通报,2022,41(5):395-404. |
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| 作者姓名： | 马超 曾斌 罗明明 权锋 於李军 李期佳 代昂 |
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| 作者单位： | 1.中国地质大学(武汉)环境学院, 武汉 430078 |
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| 基金项目： | 企事业委托项目Y102021004国家自然科学基金项目42172276 |
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| 摘 要： | 武汉市两湖隧道是国内最长、世界规模最大的城市湖底隧道, 其东湖段穿越岩溶区, 识别其岩溶水系统结构对隧道建设和运营安全具有重要意义。为查明区内岩溶水系统结构及水循环特征, 综合利用地质及水文地质勘探、水文地球化学分析等方法刻画了岩溶含水系统边界, 总结了岩溶发育规律, 识别了洞穴沉积物来源, 分析了岩溶水与孔隙水和地表水之间的水力联系, 探讨了岩溶水循环模式。结果表明: 研究区可划分为南北2个岩溶含水系统, 北段岩溶含水系统的岩溶发育程度强于南段岩溶含水系统, 北段和南段岩溶含水系统由断层带连通而具有统一的水力联系。洞穴沉积物主要来源于第四系残积层和洞穴围岩风化。第四系冲洪积层孔隙水与下伏岩溶水的水力联系较弱, 而第四系残积层孔隙水与下伏岩溶水的联系紧密。本研究利用多种技术方法精细刻画湖底隧道的岩溶水系统结构, 可服务于隧道工程的涌突水风险评价和安全施工。
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| 关 键 词： | 两湖隧道 岩溶水系统 结构特征 水循环 |
| 收稿时间： | 2022-07-05 |
Structure of karst water system and hydrological circulation characteristics of Lianghu Tunnel in Wuhan |
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| Institution: | 1.School of Environmental Studies, China University of Geosciences(Wuhan), Wuhan 430078, China2.Wuhan Municipal Engineering Design & Research Institute Co., Ltd., Wuhan 430023, China |
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| Abstract: | Among the underlake tunnels in the urban areas, the Lianghu Tunnel in Wuhan is the longest one of China and the largest one in the world.The East Lake part of this tunnel passes through the karst area. Identifying its karst water system structure is of great significance to the safety of tunnel construction and operation.To reveal the structure of the karst water system and the characteristics of the water cycle in the area, a comprehensive method of geological-hydrogeological investigation and hydrogeochemical analysis was conducted to characterize the boundary of the karst aquifer system, summarize the karst development law, identify the source of cave sediments, analyze the hydraulic connection between karst water, pore water and surface water, as well as discuss the hydrological circulation model of the karst water system.The results show that the study area can be divided into two karst aquifer systems, the north and the south.The karst development degree is stronger in the northern karst aquifer system than that in the southern karst aquifer system but has a unified hydraulic connection through the fault zone. The cave sediments mainly derived from Quaternary residual layers and the weathering of the cave surrounding rock.The pore water in the Quaternary alluvial-pluvial aquifer has a weak hydraulic connection with karst water, while the pore water in the Quaternary residual aquifer has a close hydraulic connection with karst water.The karst water system structures of underlake tunnels were characterized by a variety of techniques and methods, which helps the risk assessment of water inrush and the safe construction of tunnel engineering. |
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