| 梁森栋,张永良.大桥复合桥墩局部冲刷深度的计算分析[J].水利学报,2011,42(11): |
| 大桥复合桥墩局部冲刷深度的计算分析 |
| Analysis on the local scour around complex piers of a sea-crossing bridge |
| |
| DOI： |
| 中文关键词: 复合桥墩 局部冲刷 跨海大桥 斜交角 |
| 英文关键词: complex piers local scour sea-crossing bridge attack angle |
| 基金项目: |
|
| 摘要点击次数: 3322 |
| 全文下载次数: 301 |
| 中文摘要: |
| 桥墩的冲刷毁坏是桥梁失事的重要原因。为保证桥梁安全，需要准确评价桥墩冲刷深度。本文结合某跨海大桥，使用较为可靠的HEC-18公式对其复合桥墩的局部冲刷深度进行研究。计算结果表明，该大桥最大的可能局部冲刷深度发生在主桥主墩，复合桥墩中群桩部分造成的冲刷深度为桥墩冲刷的主要部分，且随流速增大，其在总冲刷深度中所占比例也增大，总冲刷深度对承台吃水深度变化不敏感。进一步分析表明，复合桥墩的冲刷深度随水流斜交角的变化规律与简单桥墩有较明显区别，关系更为复杂。 |
| 英文摘要: |
| The most common cause of bridge failures is scour around piers. In order to ensure the safety of the bridge，it is necessary to evaluate the scour depth accurately and take countermeasures at an early stage. In this paper the HEC-18 method is applied to evaluate the scour depth adjacent to the foundations of a sea-crossing bridge，and the results show that the deepest local scouring occurs at the main pier of the main bridge section and the scour caused by pile group of the foundation is the major part of the total scour. The total scour depth is not sensitive to the draft of the pile cap. Further discussion shows that the relationship between the scour depth of complex piers and the current attack angle is much more complicated than that for a solid pier，and proper method must be applied to deal with the problems. |
|
查看全文
查看/发表评论 下载PDF阅读器 |
| 关闭 |