杨程生,蒋振雄,俞竹青,高祥宇,高正荣.长江下游大型沉井基础局部冲刷计算公式研究[J].海洋工程,2022,40(3):105~114
长江下游大型沉井基础局部冲刷计算公式研究
Study on local scour calculation formula of large open caisson foundation in the lower reaches of the Yangtze River
投稿时间:2021-08-02  
DOI:10.16483/j.issn.1005-9865.2022.03.012
中文关键词:  桥梁工程  超大沉井  宽水槽  平衡冲刷深度  长宽比  局部冲刷公式
英文关键词:bridge engineering  super large open caisson  wide flume  equilibrium scour depth  aspect ratio  local scour formula
基金项目:国家重点研发计划项目(2019YFB1600700);交通运输行业重点科技项目(2019-MS1-011)
作者单位
杨程生 南京水利科学研究院, 江苏 南京 210029 
蒋振雄 江苏省交通工程建设局, 江苏 南京 210004 
俞竹青 南京瑞迪建设科技有限公司, 江苏 南京 210029 
高祥宇 南京水利科学研究院, 江苏 南京 210029 
高正荣 南京水利科学研究院, 江苏 南京 210029 
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中文摘要:
      大型沉井基础在长江下游大跨径跨江大桥工程中应用越来越多,基础局部冲刷深度预测是设计时需要重点考虑的问题之一。国内外对桥梁基础局部冲刷做了大量的研究并建立了局部冲刷计算公式,由于长江下游大型沉井基础规模越来越大,原有局部冲刷深度的预测公式存在一定的局限性。在常泰大桥超大沉井基础局部冲刷试验成果的基础上,结合长江下游南京以下跨江大桥沉井基础局部冲刷试验成果,通过量纲分析及多元回归法建立了大型沉井基础局部冲刷计算公式,并应用试验资料及实测资料进行了较好的验证。该公式计算结构简单,可供长江下游大型沉井基础局部冲刷深度估算参考和应用。
英文摘要:
      Large open caisson foundation is more and more used in the project of long-span river crossing bridge in the lower reaches of the Yangtze River. The prediction of local scouring depth of foundation is one of the key problems to be considered in the design. A lot of researches have been done on the local scour of bridge foundation at home and abroad, and the calculation formula of local scour has been established. Due to the increasing scale of large open caisson foundation in the lower reaches of the Yangtze River, the original prediction formula of local scour depth has some limitations. Based on the local scouring test results of the super large open caisson foundation of the Changtai Bridge and the local scouring test results of the open caisson foundation of the bridge over the Yangtze River below Nanjing, we have established a calculation formula for the local scouring of the large open caisson foundation using dimensional analysis and multiple regression method, which is well verified by the test data and measured data. The formula has a simple calculation structure and can be used as a reference as well as an application method for the estimation of local scouring depth of large open caisson foundation in the lower reaches of the Yangtze River.
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