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地震共振涌浪作用下冰碛堰塞坝的漫顶溃决

张聪 姚令侃 黄艺丹 苏玥

张聪, 姚令侃, 黄艺丹, 苏玥. 地震共振涌浪作用下冰碛堰塞坝的漫顶溃决[J]. 西南交通大学学报, 2021, 56(3): 564-571. doi: 10.3969/j.issn.0258-2724.20190454
引用本文: 张聪, 姚令侃, 黄艺丹, 苏玥. 地震共振涌浪作用下冰碛堰塞坝的漫顶溃决[J]. 西南交通大学学报, 2021, 56(3): 564-571. doi: 10.3969/j.issn.0258-2724.20190454
ZHANG Cong, YAO Lingkan, HUANG Yidan, SU Yue. Overtopping Failure of Moraine Dams under Action of Earthquake-Induced Resonant Water Surges[J]. Journal of Southwest Jiaotong University, 2021, 56(3): 564-571. doi: 10.3969/j.issn.0258-2724.20190454
Citation: ZHANG Cong, YAO Lingkan, HUANG Yidan, SU Yue. Overtopping Failure of Moraine Dams under Action of Earthquake-Induced Resonant Water Surges[J]. Journal of Southwest Jiaotong University, 2021, 56(3): 564-571. doi: 10.3969/j.issn.0258-2724.20190454

地震共振涌浪作用下冰碛堰塞坝的漫顶溃决

doi: 10.3969/j.issn.0258-2724.20190454
基金项目: 国家自然科学基金(41571004,41902302);中国科学院国际伙伴计划项目“中尼交通廊道灾害风险及其应对策略研究”(131551KYSB20180042);四川省重点研发项目(2019YFG0001)
详细信息
    作者简介:

    张聪(1989—),男,博士研究生,研究方向为铁路公路灾害防治及安全技术,E-mail:zhangcong@my.swjtu.edu.cn

    通讯作者:

    姚令侃(1953—),男,教授,博士生导师,研究方向为铁路公路灾害防治及安全技术,E-mail:yaolk@home.swjtu.edu.cn

  • 中图分类号: TV69

Overtopping Failure of Moraine Dams under Action of Earthquake-Induced Resonant Water Surges

  • 摘要: 为了研究冰碛坝在地震共振涌浪作用下的漫顶溃决机制,设计了振动台造波模型实验. 首先,通过对比实验获取了地震共振涌浪运动规律和最大波高的影响因素,并通过量纲分析建立了共振条件下涌浪最大波高计算公式;其次,依据非均匀沙起动临界水头高度与溃坝输沙临界水量条件,建立涌浪作用下堰塞坝漫顶溃决临界条件与溃决风险评估程式;最后,以帕隆藏布流域川藏铁路交通廊道沿线34个小型冰碛堰塞湖为例说明评估程式的作业流程. 研究结果表明:地震触发小型水体共振时涌浪运动幅度远超同等条件下的非共振涌浪幅度,且地震作用停止后涌浪波幅缓慢衰减,在共振涌浪时程曲线中存在稳态幅值持续运动阶段;当考虑地震共振效应后,帕隆藏布流域危险冰碛湖数量由3增至11,并在地震动水平地震加速度(PGA)较小区域均有分布;研究可为川藏铁路等沿线堰塞湖地震溃坝风险评估提供科学依据.

     

  • 图 1  实验装置(单位:cm)

    Figure 1.  Sketch of the experimental setup (unit: cm)

    图 2  白噪声激励下涌浪波高时程傅立叶幅值谱

    Figure 2.  Fast Fourier transform (FFT) spectrum of wave height time history due to white noise excitation

    图 3  E1地震波及相应的非共振涌浪时程曲线(水深30.0 cm)

    Figure 3.  E1 earthquake wave and the induced non-resonant water wave (water depth = 30.0 cm)

    图 4  E2地震波及相应的共振涌浪时程曲线(水深30 cm)

    Figure 4.  E2 earthquake wave and the induced resonant water wave (water depth = 30 cm)

    图 5  不同水深条件下地震共振涌浪最大波高随PGA变化

    Figure 5.  Variations of maximum wave elevation with increasing PGA at different water depths

    图 6  无量纲最大波高拟合曲线

    Figure 6.  Fitting curve for the non-dimensional maximum wave height

    图 7  涌浪作用下堰塞坝溃决风险评估程式

    Figure 7.  Risk assessment procedure for the overtopping failure of natural dams due to earthquake-induced water waves

    图 8  帕隆藏布流域危险冰碛湖分布

    Figure 8.  Risk map of the moraine-dammed lakes in the Parlung Zangbo river basin

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出版历程
  • 收稿日期:  2019-05-17
  • 修回日期:  2019-12-03
  • 网络出版日期:  2019-12-11
  • 刊出日期:  2021-06-15

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