湖南大学学报（自然科学版）2016，Vol.43Issue(12)：148-155,8.
明渠流下生物作用对管道沉积物冲蚀特性影响试验研究∗
Flume Experimental Study of Erosion Characteristic of Sewer Sediment with Biological Activities
摘要
Abstract
Seriousness of the problems caused by sediment deposits in urban sewer pipe has been widely recog-nized.Using circulating water tank,scouring tests on the sewer sediment with biological activities were carried out, and the influence of biological activities on erosion characteristics of real in-sewer sediment with different volatile solid (VS)contents under open channel flow by controlling the conditions of dissolved oxygen concentrations and incubation time was also investigated.The results indicate that the biological activities exhibited both positive and negative influ-ences on the erosion law of sewer sediment.It improved the anti-erosion capability by enhancing the binding strength between particles,and the erosion resistance was weakened due to the increase of the porosity of the internal structure of the sediment.Meanwhile,the weak biological activities in the sediment with lower organic content can strengthen the erosion resistance with the incubation time.On the contrary,strong biological activities of sediment with high VS content leaded to the weakening of the erosion resistance.The effect of biological activities on erosion characteristic was also related to the shear force of the flow for the sediment with appropriate VS content.关键词
管道沉积物/高挥发性有机物含量/生物活动/冲蚀特性Key words
sewer sediment/high volatile solid content/biological activity/erosion characteristic分类
建筑与水利引用本文复制引用
邵卫云,钱栋,马妍,周永潮,张仪萍..明渠流下生物作用对管道沉积物冲蚀特性影响试验研究∗[J].湖南大学学报（自然科学版）,2016,43(12):148-155,8.基金项目
国家水体污染与治理科技重大专项(2011ZX07301-004) （2011ZX07301-004）
国家自然科学青年基金资助项目(51308492) （51308492）
浙江省自然科学基金资助项目(Y13E080011) （Y13E080011）
中央高校基本科研业务费专项资金资助项目 （）
