摘要
海庙作业区是莱州港的重要组成部分。根据吞吐量预测,现急需建设#5、#6泊位并对码头前沿水域进行疏浚。本文采用MIKE21中HD模块建立渤海湾潮流模型,研究工程建设对水动力环境的影响。为了得到更精确的结果,采用嵌套网格离散工程海域。将数值模型的结果与测站的观测结果进行了对比。潮流的相位差为10min,潮位差10cm。计算得到的潮流流速也与观测结果吻合良好。根据验证结果,作者认为本文建立的数值模型可以比较精确地预测潮流场。基于工程前后不同的岸线和水深数据,分别建立了工程前后的数值模型,通过结果对比,得到以下结论:(1)海庙作业区位于太平湾南部,该海域的潮流为非正规半日潮型,平均涨潮历时大于平均落潮历时,日不等现象较为明显。(2)落急时刻海庙作业区整体水流方向为SW-NE向;涨急时刻海庙作业区北部海域水流流向主要为N-S向,向南逐渐改变为NNW-SSE向。(3)工程建设前,起到挑流作用的主要是作业区西部的堤防;全部工程建设后,起到挑流作用的主要是作业区西部的新码头岸线;工程建设导致码头西部在涨急、落急时刻的流速均有所增大,且增幅超过10cm/s,岸线的变化导致水流方向变化较为明显,最大值超过20°。(4)港池的开挖导致作业区南部水域水流速度明显减小,流态平顺,有利于港池的靠船作业的顺利进行。需要注意的是:港池流速变小有利于泥沙的沉积;来沙方向的来沙量对于港池清淤的间隔时间影响较大,在实际工程中应给予相应的措施。
Haimiao operation zone is an important component of Laizhou Port.According to the prediction of throughput,the construction of 5th and 6th berth and the dredging of wharf apron space are extremely urgent.In order to study the influences on the hydrodynamic environment of construction,HD module of MIKE21 is adopted to establish the tide current model of Bohai Bay.Nested meshes are utilized to discrete the engineering region to obtain accurate results.The results of numerical model are validated by measured data in several observation stations.The phase difference is 10 minutes,and tidal level difference is 10 centimeters.The computed tidal velocities show good agreement with measured data.Based on the validation results,it is reasonable to believe that the numerical model established in this paper is accurate in predicting the flow field.Two numerical models are built using different data of shoreline and water depth before and after constructions.By comparison,the following results are obtained.（1）Haimiao operation zone is in the south of Taiping Bay.The tide belongs to irregular semidiurnal tide,and the duration of tidal rise is longer than the duration of tidal ebb.The diurnal inequality is obvious.（2）The overall flow direction of Haimiao operation zone is SW-NE in maximum ebb tide,and N-S in maximum flood tide in the north area,gradual changing to NNW-SSE direction southward.（3）The new frontage picks the flow after the construction,by contrast,the jetty pier picks the flow before the construction of 5th and 6th berth.The flow velocity in maximum ebb tide and flood tide increases compared with that before construction,and the increasing amplitude exceeds 10cm/s.A difference of 20 degree in direction is obtained because of the shoreline change.（4）The dredge of the wharf basin leads to a slower and smoother flow,which is beneficial for berthing and operations.One thing to note is that the decrease of flow velocity increases the possibility of sediment silting-up.Corresponding measures should be ta
出处
《中国海洋大学学报（自然科学版）》
CAS
CSCD
北大核心
2016年第4期134-141,共8页
Periodical of Ocean University of China
基金
国家自然科学基金项目(51279186
51479183)资助~~
关键词
海庙港
泊位建设
港池疏浚
水动力环境
HD模块
数值模拟
Haimiao operation zone
berth construction
wharf basin dredging
hydrodynamic environment
HD module
numerical simulation
