| 摘要: |
| 目前，码头淤积和减淤措施的分析计算中，很少考虑船舶停靠的影响。针对金塘水道某码头，建立二维潮流泥沙模型，数值计算得到的潮流、含沙量结果与实测结果吻合。进而分析船舶停靠对潮流水动力和码头冲淤变化的影响。计算结果表明：船舶停靠阻碍了潮流运动，导致流速减小和泥沙淤积，但影响仅为周边区域。在考虑船舶停靠频率不变的前提下，针对目前1#，2#泊位最大月淤积强度接近实测淤积量（＞1.15 m）这一情况，提出了3种减淤方案，并计算了实施方案1后的潮流和冲淤变化，发现导堤长度对减淤效果影响很大。对于重淤区而言，基于综合分析比较，短堤的防淤减淤效果较好，故推荐采用短堤方案。 |
| 关键词: 潮流泥沙 数值模拟 船舶停靠 减淤 码头 |
| DOI： |
| 分类号:U657.2 |
| 基金项目:海洋可再生能源专项资金资助项目（GHME2011ZC04， GHME2012ZC02） |
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| Measures for siltation abatement in a wharf considering ships berthing |
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BAI Zhi-gang, ZANG Ying, YANG Wu
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State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin
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| Abstract: |
| At present, the impacts of ships berthing have been rarely considered in the analysis and calculation of siltation and deposition reduction. In this paper, a 2-D mathematical model is applied to studying the current and sediment transport of a busy wharf in the Jintang waterway, and the simulated results of current and suspended sediment are verified by the measured data from the site. The influences of ships berthing on changes of the tide field and scouring and silting amaunt are studied. The calculated results show that the ships berthing hinders the flowing of the current, thus it results in reduction of the current speed and siltation. But the ships only affect their surrounding areas. Considering the berthing of ships, the max monthly sediment silting strength of NO.1 and 2 berths can reach up to 1.15 meters, which is more approximate to the measured data. For the heavily deposited areas, three kinds of schemes for siltation abatement are put forward, and the calculation and analysis of current and siltation after taking measures against sitation are carried out. For the siltation abatement, the dikes with different lengths have different effects. A comprehensive comparison show that the short dikes have effective effects on the siltation abatement. The scheme of short dikes is recommended for reduction of siltation in the dock basin. |
| Key words: tidal current and sediment numerical simulation ships berthing siltation abatement wharf |
