摘要
冰凌灾害是严重威胁河道防洪及跨河工程的重大问题.由于冰凌问题的复杂性,开展了跨河桥梁冰凌物理模型系列试验.试验结果表明,河段卡冰应具备一定的河床边界条件及水流条件.在来流量400～600m3/s,来冰密度大于50％,河段出现卡冰.桥位卡冰最大水位壅高值与来冰系数ξ存在较好响应关系,当ξ为0.154时,水位壅高值最大.
Ice disaster is a serious threat to the flood control and spanning river engineering. Due to the com- plexity of the ice issue, a physical model experiment is conducted to research the ice flow effected by a bridge across the river. The results show that particular boundary and flow condition are required for the formation of the ice jam. In condition of the discharge of 400 - 600 m3/ s with the ice density greater than 50% , the ice jam formed. There is a good relationship between the maximum damming level and the ice coefficientS：. The damming level reaches to the maximum value ,when ξ is equal to 0. 154.
出处
《泥沙研究》
CSCD
北大核心
2014年第4期49-54,共6页
Journal of Sediment Research
基金
黄河水利科学研究院中央级基本科研业务费专项(编号:HKY-JBYW-2013-24)
关键词
跨河桥梁
模拟试验
冰密度
冰塞水位
黄河
across river bridge
physical model experiment
ice density
ice jam stage
the Yellow River
