中国地质灾害与防治学报2026，Vol.37Issue(3)：43-55,13.DOI:10.16031/j.cghc.202510032
四川康定日地沟"8·3"泥石流灾害大块石冲击特征分析
Analysis of impact characteristics of large boulders in the"August 3"debris flow disaster in Ridi gully,Kangding,Sichuan
摘要
Abstract
Debris flows carrying large boulders often cause more severe damage to buildings and structures than conventional debris flows.The"August 3"extreme large debris flow in Ridi gully carried large boulders,destroyed an expressway bridge,buried houses,and blocked the Kangding River.Based on field investigation and existing research results on large boulders in debris flows,this paper analyzes the disaster-causing characteristics of the debris flow.It also explores the distribution,impact characteristics and causes of large boulders in combination with UAV aerial survey images,and puts forward corresponding prevention and control suggestions.The impact force of debris flow slurry in Ridi gully is 102.39 kN,and the maximum impact force of large boulders is 30 638.54 kN,which can be more than 300 times that of slurry.Collapses and landslides are extremely developed in the Ridi gully basin,with 16 landslides and 157 collapses.The debris flow discharge is large,and the peak debris flow discharge at the broken bridge can reach 1 600 m3/s.The distribution density of large boulders is positively correlated with the development degree of collapses and landslides in the basin.Frequent earthquakes intensify the development of collapses and landslides and promote the formation of large boulders.New mountain fissures exist in the Ridi gully basin,which is under great threat of mountain collapse and landslide.关键词
日地沟/泥石流/块石/冲击力/分布特征Key words
Ridi gully/debris flow/boulder/impact force/distribution characteristics分类
天文与地球科学引用本文复制引用
申文豪,胡桂胜,贺拿,李雨阳..四川康定日地沟"8·3"泥石流灾害大块石冲击特征分析[J].中国地质灾害与防治学报,2026,37(3):43-55,13.基金项目
国家自然科学基金面上项目(42471095) （42471095）
国家重点研发计划课题(2023YFC3008301) （2023YFC3008301）
四川省自然科学基金项目(2023NSFSC2086) （2023NSFSC2086）
