白鹤滩库区五里坡滑坡蓄水变形机理与潜在涌浪  

Deformation Mechanisms and Potential Impulse Wave of the Wulipo Landslide in the Baihetan Reservoir Region

作　　者：易小宇[1,2,3] 祝传兵 杨帆 冯文凯 李博韬[1] YI Xiao-yu;ZHU Chuan-bing;YANG Fan;FENG Wen-kai;LI Bo-tao(State Key Laboratory of Geohazard Prevention and Geoenvironment Protection,Chengdu University of Technology,Chengdu 610059,China;Yunnan Key Laboratory of Geohazard Forecast and Geoecological Restoration in Plateau Mountainous,Kunming 650093,China;Key Laboratory of Plateau Geohazards Monitoring&Warning and Ecological Conservation&Restoration,Ministry of Natural Resources,Kunming 650093,China)

机构地区：[1]成都理工大学地质灾害防治与地质环境保护国家重点实验室,成都610059 [2]云南省高原山地地质灾害预报预警与生态保护修复重点实验室(筹),昆明650093 [3]自然资源部高原山地地质灾害预报预警与生态保护修复重点实验室,昆明650093

出　　处：《科学技术与工程》2024年第29期12461-12467,共7页Science Technology and Engineering

基　　金：云南省高原山地地质灾害预报预警与生态保护修复重点实验室(筹)和自然资源部高原山地地质灾害预报预警与生态保护修复重点实验室开放基金课题(YNGGR2023-02)。

摘　　要：水库滑坡破坏产生的涌浪会大幅度增加滑坡造成的人员伤亡和财产损失。通过现场调查和数值模拟分析研究了白鹤滩水电站五里坡滑坡的蓄水变形机理与潜在涌浪。结果表明,五里坡滑坡由下部软岩、上部硬岩构成的软弱基座型风化碎裂岩质滑坡,其变形破坏模式为压缩-拉裂-剪断,长期库水升降循环作用下存在整体失稳破坏可能性。进一步数值模拟分析表明,五里坡滑坡在最高蓄水位整体破坏激发的冲击波不会对临近的蒙姑社区和甘葫路造成破坏性影响,但可影响过往船只安全通行。因此,可考虑采用坡体削方等工程措施降低五里坡滑坡潜在冲击波风险。The failure of a landslide in proximity to a reservoir generates impulse waves,leading to significant casualties and property losses.Through presents a comprehensive field investigation and simulation analysis of the potential impulse waves emanating from the Wulipo landslide,which exhibited deformation following the initial impoundment at the Baihetan hydropower station.The results show that Wulipo landslide is characterized as a weak-based,weathered,and fragmented rockslide,with soft rock in the lower section and hard rock in the upper section.The deformation and failure mechanism triggered by the action of reservoir water involves compression,fracturing,and shearing.Periodic fluctuations in the reservoir's water level could potentially initiate a complete slip failure of the landslide.Numerical simulations conducted indicate that,at peak water levels,the overall failure event at the Wulipo landslide is unlikely to cause significant destructive impacts on the neighboring Menggu Community and Ganhu Road.Consequently,engineering measures aimed at reducing the landslide volume can effectively mitigate the potential impulse wave risk posed by Wulipo landslides.

关 键 词：白鹤滩库区 水库滑坡 变形机理 涌浪 FLOW3D 

分 类 号：P642.22[天文地球—工程地质学]