孙鸿渐,王军.冰盖下桥墩局部最大冲刷深度试验研究[J].中国水利水电科学研究院学报,2021,19(6):533-540
冰盖下桥墩局部最大冲刷深度试验研究
Local maximum scour depth of bridge piers under ice cover: An experimental study
投稿时间:2020-06-09  
DOI:10.13244/j.cnki.jiwhr.20200077
中文关键词:  冰盖  桥墩  局部冲刷  试验研究
英文关键词:ice cover  pier  local scour  experimental study
基金项目:国家自然科学基金项目(51879065);国家重点研发计划项目(2018YFC1508401);合肥工业大学研究生质量工程项目(2018YKC02)
作者单位E-mail
孙鸿渐 合肥工业大学 土木与水利工程学院, 安徽 合肥 230009  
王军 合肥工业大学 土木与水利工程学院, 安徽 合肥 230009 junwanghfut@126.com 
摘要点击次数: 59
全文下载次数: 64
中文摘要:
      冬季寒冷的北方河流易形成冰盖或冰塞,冰盖的存在对桥墩附近局部冲刷产生影响。在清水冲刷条件下,试验研究了有无冰盖条件下,不同流速和水深对桥墩附近局部冲刷的影响。研究结果表明:对比明流条件,冰盖的存在导致更大的近底流速和近底流速梯度,从而桥墩局部最大冲刷深度更大;其它条件相同的情况下,随流速的增大,桥墩局部最大冲刷深度增大;随着桥墩墩径增大,桥墩局部最大冲刷深度增加;水深增加时桥墩局部最大冲刷深度相对减小。根据试验数据,给出了有冰盖条件下桥墩局部最大冲刷深度的计算公式,与国内外相关试验数据吻合较好。
英文摘要:
      Both ice cover and ice jams occur frequently in northern rivers in the winter. The presence of ice cover has an effect on local scour around the piers. Under the condition of clean water scour, the impact of ice cover, velocity and water depth on local scour around the pier was studied experimentally. The results show that the presence of ice cover leads to greater flow velocity and gradient of flow velocity near bed compared to open channel conditions. Therefore, the local maximum scour depth of the pier is greater. If the flow velocity or pier diameter increases, the local maximum scour depth becomes larger. If the water depth increases, the local maximum scour depth under ice cover becomes smaller. According to the experimental data, the formula is given for calculating the maximum local scour depth of the pier under the condition of ice cover,and the results are in good agreement with the experimental results at home and abroad.
查看全文  查看/发表评论  下载PDF阅读器
关闭