特大型水中沉井基础局部冲刷模型试验研究  

Local Scour Experiment and Study on Model of Large Scale Floating Open Caisson Foundation

作　　者：陈策[1] 

机构地区：[1]江苏省长江公路大桥建设指挥部,泰州市225321

出　　处：《公路》2010年第12期18-21,共4页Highway

基　　金：国家科技支撑计划资助项目;项目编号2009BAG15B02

摘　　要：泰州大桥中塔采用了目前我国最大规模的水中沉井基础,浮运沉井施工过程中,由于沉井、水流、泥沙三者的相互作用,将会产生浮运沉井施工期冲刷,进而影响沉井施工,准确地了解沉井下沉过程中的局部冲刷深度具有重要的工程意义和实用价值。通过河工模型试验分析了大型水中深井下沉过程中的局部冲刷情况,并提出了相应的计算公式。施工期间对河床的局部冲刷进行了监测,监测数据表明模型试验的结果基本可靠,并根据实际局部冲刷数据,提出了有关的沉井施工建议。Taizhou Bridge tower adopts open caisson foundation under the water,which is the largest open caissons in China.During the floating caisson construction,due to interaction of open caisson,water flow and sediment,local scour will be produced.It will effect caisson construction.Understanding the local scour depth of caisson in the process sinking has important engineering significance.The local scour of the deep water caisson is analyzed through the model tests and a corresponding formula is put forward.During construction,local scour of the river bed is monitored.Monitoring data shows that the model test results are reliable.Based on actual local scour data,the relevant recommendations of the caisson construction are put forward.

关 键 词：水中沉井 局部冲刷 施工期冲刷公式 模型试验 工程验证 

分 类 号：U443.131[建筑科学—桥梁与隧道工程]