摘要
为了阐明狭窄型库区滑坡涌浪的生成特性和传播特性,明晰在狭窄水域中滑坡体入水速度对涌浪特性的影响和工程的危害,以羊曲水电站狭窄库区中的1#变形体为例,采用三维数值模拟方法分析库区滑坡涌浪的产生、发展和传播全过程,同时建立1∶200水工物理模型进行验证,进一步论证滑坡体滑速对工程的危害。结果表明:数值模拟与物理模型试验涌浪时程线基本一致,试验在滑坡发生地和坝前测得的涌浪高度与模拟结果吻合良好。在狭窄水域中,首波波高随滑速的增大而减小,并且在波列中首波的波高不一定最大。此外,首波向大坝传播过程中没有发现明显的衰减,但其对总漫坝水量的贡献很小,漫坝流量峰值出现的时刻明显晚于首波到达坝前的时刻。
In order to clarify the generation and propagation characteristics of landslide-generated waves in narrow reservoir areas,the influence of landslide impacting velocity on the wave characteristics and reservoir structure is investigated,taking the potential landslide No.1 in the Yangqu Reservoir as an example.The whole process of landslide generation,development and propagation is analyzed using a three-dimensional numerical model,which is then verified by a physical model with a proportional scale of 1∶200.The results show that the time line of the waves simulated by the three-dimensional numerical model agrees well with that by the physical model,and the wave heights measured at the generation location and in front of the dam are consistent with the simulation results.In narrow reservoirs,the height of the leading wave decreases with the increase of the velocity,and it is not necessarily the highest among the waves.No obvious damping is found for the leading wave during the propagation from the landslide to the dam,but it contributes little to the total overtopping volume,because the peak of the overtopping discharge appears much later than the leading wave,which is probably due to the multiple scattering of waves near the dam.
作者
贺翠玲
李鹏峰
张智
荆海晓
万克诚
段军邦
HE Cuiling;LI Pengfeng;ZHANG Zhi;JING Haixiao;WAN Kecheng;DUAN Junbang(Shaanxi Water Ecological Environment Engineering Technology Research Center,Xi’an 710065,China;Northwest Engineering Corporation Limited,Xi’an 710065,China;State Key Laboratory of Eco-Hydraulics in Northwest Arid Region of China,Xi’an University of Technology,Xi’an 710048,China;High Slope and Geological Hazard Research and Treatment Sub-center of National Energy and Hydropower Engineering Technology Research and Development Center,Xi’an 710065,China;Huanghe Hydropower Development Co.,Ltd.,Xining 810000,China)
出处
《水资源与水工程学报》
CSCD
北大核心
2023年第5期124-131,共8页
Journal of Water Resources and Water Engineering
基金
国家自然科学基金项目(51909211)
陕西省自然科学基础研究计划项目(2019JQ-744)
西安市科技计划项目(23GXFW0050)。
关键词
狭窄型水库
滑坡涌浪
滑坡速度
波高
涌浪特性
数值模拟
narrow reservoir
landslide wave
landslide velocity
wave height
wave characteristics
numerical simulation
