地质科技通报2025，Vol.44Issue(2)：59-66,8.DOI:10.19509/j.cnki.dzkq.tb20240247
基于物理模型试验的库岸滑坡水阻力系数研究
Water resistance coefficient of bank slope landslides via physical model experiments
摘要
Abstract
[Objective]Hydrodynamic resistance is one of the key factors influencing the velocity of landslides entering water.To quantify the resistance experienced by reservoir bank landslides upon water entry and provide experimental data and a theoretical basis for analyzing their entry velocity,this study designed an experiment to measure the water entry resistance coefficient.[Methods]Based on the dynamics and kinematics equations of submerged test blocks,a comprehensive calculation model for the water resistance coefficient was established.The experimental results were analyzed using dimensionless analysis methods to investigate the effects of various dimensionless factors on the water resistance coefficient.A multiple linear regression analysis was conducted to derive the comprehensive water resistance coefficient calculation model.Taking the Baige landslide of October 11,2018,as a case study,the velocity of the Baige landslide was calculated using the theoretical formula for the water resistance coefficient,and the results were compared with those obtained from other methods.[Results]The results indicate that as relative velocity increases,the comprehensive water resistance coefficient initially rises and then decreases.Additionally,as the relative cross-sectional area increases,the comprehensive water resistance coefficient decreases.The theoretical formula for the water resistance coefficient has a coefficient of determination(R2)of 0.77,demonstrating good accuracy.Compared to existing calculation results,considering hydrodynamic resistance,the maximum movement speed of the Baige landslide decreased by 23.5%,with a maximum speed difference of 8.5 m/s,and the time at which the maximum speed occurred was delayed by 7.7 seconds.[Conclusion]This study proposes a comprehensive calculation model for the water resistance coefficient,addressing the challenge of determining its value accurately.This model contributes to improving the prediction accuracy of the entry velocity of reservoir bank landslides,thereby enhancing risk assessment and mitigation efforts.关键词
物理模型试验/库岸滑坡/滑坡速度计算/水阻力系数/白格滑坡Key words
physical model experiment/submerged landslide/landslide velocity calculation/water resistance coefficient/Baige landslide分类
天文与地球科学引用本文复制引用
谢云轩,汪洋,王梦瑶,冯霄,彭铿,付昱衡..基于物理模型试验的库岸滑坡水阻力系数研究[J].地质科技通报,2025,44(2):59-66,8.基金项目
国家自然科学基金项目(42077277) （42077277）
中国地质大学(武汉)教学试验室开放基金资助项目 （武汉）
