天兴洲大桥2号墩浮运围堰施工冲刷计算分析研究  

Calculation,Analysis and Study of Scouring Due to Floating Construction of Cofferdam for Pier No.2 of Tianxingzhou Bridge

作　　者：陈述[1] 

机构地区：[1]中铁大桥勘测设计院有限公司,湖北武汉430050

出　　处：《桥梁建设》2006年第A02期72-74,79,共4页Bridge Construction

摘　　要：针对天兴洲大桥2号墩浮运围堰施工冲刷,采用现行规范中的桥渡冲刷计算原理进行计算分析,初步认识冲刷计算式的结构特性;进行局部冲刷水槽试验,进一步深入研究分析行近水深、行近流速以及围堰入水深度对浮运围堰冲刷的影响;利用冲刷计算与试验结果,为2号墩浮运围堰施工期安排提供有力依据。In the light of the local scouring that will be caused by floating construction of the cofferdam for Pier No. 2 of Tianxingzhou Bridge, the calculation principles of bridge crossing scouring in the current specifications are used to calculate and analyze the scouring of the floating construction of the cofferdam and preliminary understandings of the bridge structure based on the calculation in the specifications are obtained. The river channel tests for the local scouring are then made to further study and analyze the influences of water depth, water current of the ap- proaching cofferdam and depth of the cofferdam in the river on the scouring due to the floating construction. With the results of the calculation and tests for the scouring, the convincing bases of time arrangement for the floating construction are provided.

关 键 词：桥墩 围堰 局部冲刷 水槽试验 

分 类 号：U443.22[建筑科学—桥梁与隧道工程] U442.3[交通运输工程—道路与铁道工程]