| 圆柱桥墩绕流特性理论研究 |
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| 引用本文： | 田伟平,沈波.圆柱桥墩绕流特性理论研究[J].长安大学学报(自然科学版),2003,23(1):54-57. |
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| 作者姓名： | 田伟平 沈波 |
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| 作者单位： | 长安大学,公路学院,陕西,西安,710064 |
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| 摘 要： | 对圆柱桥墩绕流特性理行了理论研究。为了防止桥墩发生过大冲刷应在理想液体绕流动量守恒影响范围 S1=1 .6a,即距桥墩 0 .6a范围内防护 ,考虑由于实际圆柱桥墩后一对复合涡体可能的影响 ,最大流流速按 2 V并乘适当安全系数进行设计。至少必须在理想液体绕流比动能守恒影响范围 S2 =1 .1 9,即距桥墩 0 .1 9a范围内防护。为防止可能发生的桥墩绕流对行船的影响 ,避免水流的影响防止轮船对桥墩的冲撞 ,其防撞栏设置应在 r=1 0 a处。
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| 关 键 词： | 圆柱桥墩 复势绕流 桥墩冲刷防护范围 桥墩防撞防护范围 |
| 文章编号： | 1671-8879(2003)01-0054-04 |
| 修稿时间： | 2002年5月29日 |
Circling flow characteristics around cylinder pier |
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| TIAN Wei ping,SHEN Bo.Circling flow characteristics around cylinder pier[J].JOurnal of Chang’an University:Natural Science Edition,2003,23(1):54-57. |
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| Authors: | TIAN Wei ping SHEN Bo |
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| Abstract: | In order to prevent pier's heavy scouring,the pier shelter should be placed 0 6a away from pier(a is pier's half diameter).Considering a pair complex vortexes capable influence of the back pier, the maximum design velocity should be 2V and timed with safety coefficient.For preventing pier circling flow's capable effect on sailing ship,and avoid ship colliding the pier,the guard fence around the pier should be installed at range of r=10a. |
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| Keywords: | cylinder pier complex power's circling flow sheltered range of pier's heavy scouring protected range of avoiding ship colliding pier |
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