CAJ | 학술논문

为研究甬江上已建桥梁群对感潮河流防洪纳潮的影响，基于Delft3 D模型建立甬江二维非恒定流数学模型，并使用原型观测数据对模型进行参数率定和验证，开展典型洪水和潮汐条件下桥梁群对甬江水流流速和水位的影响研究。结果表明：单个桥梁对水流的影响主要在桥位近区，桥梁群因影响范围的重叠而产生累积影响，且增加了对水流的影响范围。通过不同洪水和潮汐条件下桥梁群对水流的影响比较发现，大潮小洪情况下桥梁群对甬江水流的影响较大洪小潮情况下更为明显。
위연구용강상이건교량군대감조하류방홍납조적영향，기우Delft3 D모형건립용강이유비항정류수학모형，병사용원형관측수거대모형진행삼수솔정화험증，개전전형홍수화조석조건하교량군대용강수류류속화수위적영향연구。결과표명：단개교량대수류적영향주요재교위근구，교량군인영향범위적중첩이산생루적영향，차증가료대수류적영향범위。통과불동홍수화조석조건하교량군대수류적영향비교발현，대조소홍정황하교량군대용강수류적영향교대홍소조정황하경위명현。
In order to study the effects of a group of bridges built across the Yongjiang River, a tidal river, on the flood and tide control of the river, a two-dimensional numerical model was established for the unsteady flow of the Yongjiang River based on the Delft3D model. The established model was calibrated and verified by the field observation data and used to study the influence of the group of bridges on the flow velocity and water level of the river under different flood and tide conditions. The results show that a single bridge has an effect on the flow near the bridge, while a group of bridges have a much greater accumulative influence on the flow velocity and water level and increase the influenced area. The effects of the bridges on water flow under different flood and tide conditions were compared. It was found that the effects of the bridges were more significant under the conditions of a spring tide and a small flood than under the conditions of a large flood and a neap tide.