三峡库区棺木岭危岩体涌浪风险防控研究
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徐锦宏(1989-),男,工程师,硕士。主要从事地质灾害防治工作。E-mail:474674555@qq.com

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TU443

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国家自然科学基金项目(42077234)资助


Study on Risk Prevention and Control for Impulse Wave Generated by the Guanmuling Dangerous Rock Mass in the Three Gorges Reservoir Area
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    摘要:

    三峡库区棺木岭危岩体基座岩体强烈劣化,稳定性持续下降,潜在涌浪灾害严重威胁九畹溪漂流景区和长江航道的安全。本文围绕棺木岭危岩体涌浪风险防控问题,开展了基于流固耦合数值模拟的危岩体涌浪危险性评估和涉水危岩体防治设计,研究表明:在景区旺季的 145 m 水位工况下,棺木岭危岩体失稳可能产生的涌浪最大高度约为 19.2 m,在对岸九畹溪旅游码头最大爬坡高度约 15.1 m,长江干流最大涌浪爬高约 1.6 m,严重威胁约 15 km 的九畹溪航道和长江航道安全。针对危岩体处于偏心受压状态和消落区基座岩体劣化情况,对其下部凹腔进行“模袋砼围堰+岩腔填充”的工程防治设计,使得棺木岭危岩体稳定性系数从 1.3 提升至 2.6。本次研究直接指导了棺木岭危岩体防治工程,可为库区其他涉水危岩体涌浪风险防控提供借鉴。

    Abstract:

    The stability of the dangerous rock base of the Guanmuling in the Three Gorges Reservoir area continues to decline due to the severe deterioration of rock mass. Potential wave disaster induced generated by the rock mass collapse seriously threatens the safety of the Jiuwanxi drifting scenic spot and the Yangtze River waterway. This paper focuses on the risk assessment of dangerous rock wave and the prevention and control design of dangerous rock wave based on fluid-structure coupling numerical simulation. The results show that: Under the condition of the reservoir water level of 145 m in tourism peak season, the maximum possible height of wave generated by the dangerous rock mass instability in Guanmuling is about 19.2 m, with the maximum ascending height of the Jiuwanxi tourism wharf on the opposite side of 15.1 m, and the Yangtze River of 1.6 m, which seriously threatens the safety of these waterway about 15 km. In view of the dangerous rock mass under eccentric compression and the deterioration of the base rock mass in the fluctuation zone, the engineering prevention and control design of "bag concrete cofferdam + rock cavity filling" was carried out on the lower cavity of the dangerous rock mass, which increased the stability coefficient of the Guanmuling dangerous rock mass from 1.3 to 2.6. This study contributes directly to the prevention and control project of dangerous rock mass in Guanmuling, also provides reference for the risk prevention and control of wave gererated by other dangerous rock masses in the reservoir area.

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徐锦宏,黄波林,聂邦亮,许凯凯,李滨.三峡库区棺木岭危岩体涌浪风险防控研究[J].防灾减灾工程学报,2023,43(6):1395-1404

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  • 收稿日期:2022-08-02
  • 最后修改日期:2022-08-25
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  • 在线发布日期:2024-01-11
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