| 摘要: |
| 本研究通过对胶州湾大桥建成前后湾内泥沙冲淤情况进行模拟。探讨了典型时刻胶州湾大桥附近海域的海流流速和流向情况。对比胶州湾大桥建成前湾内的流场模拟结果可知，胶州湾大桥的建设对胶州湾内整体的海流流态影响较小。胶州湾大桥的建设对胶州湾水动力的改变主要在桥墩建设附近海域。通过大桥建设前后冲淤数值模拟结果可知，工程前后工程附近冲淤趋势基本一致，只是在大桥桥墩附近出现冲淤变化较大的情况，表现为在桥墩的南北两侧出现较大桥建设前淤积加强区，在桥墩的东西两侧出现冲刷加强区，在通航孔桥墩跨度较大的海域，冲刷强度增大比较明显。 |
| 关键词: 海洋地质学 Mike21 数值模拟 对比分析 胶州湾大桥 |
| DOI：10.3969/J.ISSN.2095-4972.2020.03.008 |
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| 基金项目:国家自然科学基金资助项目(41876066)；国家重点研发计划资助项目(2017YFC0307305) |
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| Numerical simulation of sedimentation and siltation before and after Jiaozhou Bay Bridge construction |
| ZHANG Yong-qiang,ZHANG Wan-jun,CHI Wan-qing,BIAN Shu-hua,CAO Cheng-lin,HU Ze-jian,LIU Jian-qiang |
| (First Institute of Oceanography, MNR, Qingdao 266061, China) |
| Abstract: |
| In this paper, the sediment scouring and silting in Jiaozhou Bay are simulated before and after the construction of Jiaozhou Bay Bridge. The current velocity and flow direction near the bridge at typical times are discussed. Compared with the simulation results of flow field in the bay before the bridge construction, it can be found that the bridge construction has little effect on the overall current patterns in Jiaozhou Bay. The changes of hydrodynamic force in Jiaozhou Bay due to the construction are mainly in area near the bridge piers. The results of numerical simulation of scouring and silting on the bridge construction show that the trend of scouring and silting is basically the same, but the scouring and silting near the bridge piers change remarkably. The siltation strengthened area appeared on the north and south sides of the piers before the bridge construction, and the scour strengthened area appears on the east and west sides of the piers after the construction. The scour intensity increases obviously in the sea area where the larger navigable span crosses. |
| Key words: marine geology Mike21 numerical simulation comparative analysis Jiaozhou Bay Bridge |
