长江科学院院报2018，Vol.35Issue(2)：44-50,7.DOI:10.11988/ckyyb.20161178
白龙江甘家沟泥石流过坝堆积物力学性能分析
Mechanical Properties of Debris Passing Through Check Dam in Ganjia Gully in the Midstream of Bailong River
摘要
Abstract
Bailong River drainage basin is an area subjected to the most severe debris flow hazard,with debris gully density and debris flow frequency ranking top in China.Despite many treatments,debris flows have caused large casualty and property losses.In this paper,the current engineering mitigation works in Ganjia gully of Bailong River basin were analyzed through field investigation,and on this basis,the particle gradations,rheological behaviors,and shear strengths of debris deposits in the upstream and downstream of check dam were compared through particle size test,rheological test and direct shear test.Results suggest that check dam plays an insignificant role in adjusting the particle size of debris flow,but apparently alters the mechanical properties of debris flow.The shear stress of debris deposit slurry in the downstream of check dam is smaller than that in the upstream;while shear strength in the downstream is slightly larger than that in the upstream.In addition,the difference in grain size distribution of debris flow is an important factor that affects the rheological properties and shear strength.The results could be used as reference for the type selection and parameter design of check dam.关键词
拦砂坝/泥石流堆积物/流变特性/抗剪强度/工程防治Key words
check dam/debris flow deposits/rheological behavior/shear strength/engineering mitigation分类
天文与地球科学引用本文复制引用
袁东,柳金峰,游勇,刘道川,孙昊,张莉..白龙江甘家沟泥石流过坝堆积物力学性能分析[J].长江科学院院报,2018,35(2):44-50,7.基金项目
国家科技支撑计划课题(2014BAL05B01) （2014BAL05B01）
中国科学院STS项目(KFJ-EW-STS-094) （KFJ-EW-STS-094）
