1·The flow patterns close to the non-submerged spur dikes are discussed on the basis of flume experiment.
针对石油工程生产需要，在非淹没、淹没以及有围压存在的条件下，对磨料射流切割油井套管进行了实验研究。
2·Then, the calculating method of initial scour velocity of bed sand around submerged spur dikes is suggested.
在分析基础上，提出了漫水丁坝坝头床沙起冲流速的计算办法。
3·The dye injection and oil-film method together with electromagnetic velocimeter are applied to measure the flow field around spur dikes.
本文介绍了用颜料示踪和最新的油膜技术对流动进行可视化记录以研究淹没丁坝群的近体流场分布的试验结果。
4·The scour limit depth around spur dikes is very important for calculating the base depth of objects and it is a key factor in designing and working.
丁坝冲深极限值是确定建筑物基础埋设深度的一个主要因素，丁坝设计和施工中的关键问题在于确定坝头最大冲深。
5·It is of great importance for the design of channel regulation structure to explore the effect of spur dikes on flow, and to study the flow structure near the spur dike.
研究丁坝对水流的影响规律以及丁坝附近水流的流动结构对于航道整治建筑物的设计具有十分重要的意义。
6·Test results show that spur dikes aligned along a single bank in the deep water zone have more effects on the adjustment of the bed topography of the wide-shallow river than in the shallow water zone;
试验结果表明，在深水区的单侧丁坝群对宽浅河床地形的调整作用大于浅水区；
7·Three kinds of permeable pile dikes with different seepage rate are tested, and effect of flow control is basically the same with the spur dike.
试验的三种透水率桩坝，其导流效果与实体丁坝群的基本相同，并未因部分透水及形态不同而使其控导作用明显减弱。
8·Three kinds of permeable pile dikes with different seepage rate are tested, and effect of flow control is basically the same with the spur dike,.
试验的三种透水率桩坝，其导流效果与实体丁坝群的基本相同，并未因部分透水及形态不同而使其控导作用明显减弱。
9·Local scour is a common occurrence around hydraulic structures like spur-dikes and bridge foundations. This affair is a main reason of failure of bank protections and Bridges.
局部绕流冲刷是丁坝和桥墩等水工建筑物周围常见的水力现象，是造成该类工程破坏的重要原因之一。