曹妃甸挖入式五港池航道与防波堤工程潮流泥沙物理模型试验研究

曹妃甸挖入式五港池建成后，浅滩区被围填或开挖成深水港池，因此港池航道主要是细颗粒泥沙淤积问题，为此通过潮流泥沙物理模型试验对五港池防波堤及航道工程进行研究。试验表明，五港池港区及防波堤建设没有改变深槽水流特性，对曹妃甸海域宏观流场基本没有影响；防波堤方案2和方案3水流条件较好，其中方案3稍优于方案2。泥沙试验表明，港池年平均淤强为0．15m／a左右，年最大回淤厚度为0．5—0．6m/a，各方案差别不大；折线航道年平均淤积强度为0．43m／a，最大为0．69m／a；直线航道年平均淤积强度为0．39m／a，最大为0．55m/a，直线航道要明显优于折线航道。从水流和泥沙试验结果分析，方案3较优，其次为方案2。试验成果为设计方案的选取提供了科学依据。

Tidal current and sediment model test and study on channel and breakwater of the fifth excavated-in harbor of Caofeidian

After the completion of the Caofeidian fifth excavated-in harbor, the shoal area becomes a deepwater harbor by the surrounding reclamation or excavation, therefore the mainly problem is fine sediment deposition in harbor channel, for this purpose, the channel and breakwater of the fifth harbor project are researched in this paper by tidal current and sediment model test. Test shows that the Caofeidian fifth harbor and breakwater construction did not change the flow characteristics of deep groove, the macroscopic flow field of Caofeidian sea area had no effect; the water flow conditions of breakwater plan 2 and 3 are better, the plan 3 is slightly better than plan 2. Sediment test shows that the annual average depositional intensity is about 0.15 m/a, the annual maximum sediment thickness is 0.5 - 0.6 m/a, the difference of each scheme is little; line channel av- erage annual siltation intensity is 0.43 m/a, the maximum was 0.69 m/a; annual average linear channel siltation intensity is 0.39 m/a, maximum 0.55 m/a, straight channel is superior to that of line channel. From the analysis of flow and sediment test results, scheme 3 is better, followed by scheme 2. Test results can provide a scientific basis for the selection of design scheme.