一种改进的滑坡涌浪动力学模型

岳霞; 戴福初; 朱杰; 朱雨轩

doi:10.11988/ckyyb.20200056

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长江科学院院报 ›› 2021, Vol. 38 ›› Issue (4) : 94-101. DOI: 10.11988/ckyyb.20200056

岩土工程

一种改进的滑坡涌浪动力学模型

岳霞, 戴福初, 朱杰, 朱雨轩

作者信息 +

An Improved Dynamic Model of Landslide Surge

YUE Xia, DAI Fu-chu, ZHU Jie, ZHU Yu-xuan

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文章历史 +

摘要

滑坡涌浪是库区最常见的自然灾害之一,为了对库区滑坡涌浪的灾害范围进行更加准确、高效的模拟,基于Sassa滑坡运动模型、COMCOT海啸模型及其开源有限差分程序、流体力学建立了流动性滑坡涌浪动力学模型。为了使模型能更好地反映滑坡涌浪的实际运动,模型考虑了滑坡涌浪的强烈耦合作用力、波浪破碎等因素对滑坡涌浪运动的影响,并通过龚家方滑坡涌浪案例验证了模型的有效性。模拟结果表明:①模拟得到滑坡的运动过程、堆积体形态、涌浪的产生、传播、爬坡与野外观测情况基本吻合;②由于岸边波能集聚,涌浪的岸边爬坡波高比河道内的波高更高;③爬坡波高在沿程递减的同时也存在波动,这与观测点的具体地形条件有关。由于模拟结果与野外观测情况相符,因此可将该模型应用于类流体滑坡涌浪的模拟,该模型的模拟结果可为类流体滑坡涌浪灾害防治工作提供参考依据。

Abstract

Landslide surge is one of the most common natural disasters in reservoir area. In order to simulate the disaster range of landslide surge more accurately and efficiently, we established a dynamic model of landslide surge based on SASSA landslide motion model, COMCOT tsunami model and its open source finite difference program. The model considers the strong coupling force of landslide surge, the wave breaking and other factors that affect the movement of landslide surge to better reflect the actual movement of landslide surge. The validity of the model is verified by the case study of the landslide surge in Gongjiafang. The simulation results show that: 1) the movement process of landslide, the shape of accumulation, the generation, propagation and climbing of the surge obtained from the simulation are in good agreement with field monitoring; 2) the wave height of the surge on the bank is higher than that in the river due to the wave energy accumulation on the bank; 3) the wave height on slope decreases and fluctuates along the way, which is dependent on the specific topography of monitoring point. Because the simulation results are consistent with the field observation, the model can be applied to the simulate the surge of fluid-like landslide.The simulation results of the model can provide a reference for the prevention and control of the surge disaster of fluid like landslide.

导出引用

岳霞, 戴福初, 朱杰, 朱雨轩. 一种改进的滑坡涌浪动力学模型[J]. 长江科学院院报. 2021, 38(4): 94-101 https://doi.org/10.11988/ckyyb.20200056

YUE Xia, DAI Fu-chu, ZHU Jie, ZHU Yu-xuan. An Improved Dynamic Model of Landslide Surge[J]. Journal of Changjiang River Scientific Research Institute. 2021, 38(4): 94-101 https://doi.org/10.11988/ckyyb.20200056

中图分类号： P694

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