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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。
The tower of Taizhou Bridge adopts the largest sinking foundation of water in our country at present. During the construction of floating sinking wells, due to the interaction of the caisson, water flow and sediment, the scouring of the floating caisson during construction period will occur It has important engineering significance and practical value to influence the caisson construction and to know accurately the local scour depth during the caisson sinking process. Through the river model test, the local scouring condition in deepwater deepwater sinking in large-scale water is analyzed, and the corresponding calculation formula is proposed. During the construction period, local scouring of the riverbed was monitored. The monitoring data showed that the results of the model test were basically reliable. According to the actual local scour data, the relevant caisson construction suggestions were put forward.