| 摘要: |
| 本文借助动水条件下弯道浅水区三维散体岩质滑坡涌浪模型试验系统，研究水流动力影响下滑坡涌浪爬高的基本规律和最大爬高的确定方法。根据物理模型试验观测资料，统计计算得到爬高特征值；分析了水流流速、河道水深、滑坡方量、滑坡倾角对爬高的影响；通过多元非线性回归分析和最小二乘法分析，分别得到动水条件下三维涌浪沿对岸和同岸的爬高衰减公式，并与静水条件下散体岩质滑坡涌浪爬高衰减公式进行了对比；采用无量纲及多元回归分析方法，给出了动水条件下涌浪最大爬高计算公式。采用长江新滩滑坡涌浪实测资料，将本文动水条件下的涌浪最大爬高公式计算值与实测值对比，二者较为接近。 |
| 关键词: 滑坡涌浪 水流流速 涌浪爬高 最大爬高 |
| DOI： |
| 分类号:U656.31 |
| 基金项目:国家自然科学(52009014,52379059)；重庆市自然科学(cstc2021jcyj-msxmX0667,CSTB2022NSCQ-MSX1556). |
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| Study on the climbing rule of 3D rock landslide surge under dynamic water conditions |
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WANG Meili1, TIAN Ye2, WANG Pingyi2, YANG Shengfa2
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1.College of Architecture and Urban Planning,Chongqing Jiaotong University;2.National Engineering Technology Research Center for Inland Waterway Regulation,Chongqing Jiaotong University
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| Abstract: |
| This article uses a three-dimensional granular rock landslide surge model test system in the shallow water zone of a bend under dynamic water conditions to study the basic laws of wave run-up under the influence of water flow dynamics and the method for determining the maximum wave run-up. Based on the observed data from physical model tests, the characteristic values of wave run-up are statistically calculated. The effects of flow velocity, channel depth, landslide volume, and landslide inclination on wave run-up are analyzed. Through multivariate nonlinear regression analysis and least squares analysis, the attenuation formulas for the three-dimensional surge along the opposite bank and the same bank under dynamic water conditions are obtained, respectively, and compared with the attenuation formula for the granular rock landslide surge under static water conditions. Using dimensional and multivariate regression analysis methods, a formula for calculating the maximum wave run-up under dynamic water conditions is given. Using the measured data of the Yangtze River Xintan landslide surge, the calculated value of the maximum wave run-up formula under dynamic water conditions in this article is compared with the measured value, and they are relatively close. |
| Key words: landslide surge water flow velocity surge run-up maximum surge run-up |
