海岸直接取水结构内波浪传播及消浪措施研究

摘要

对于沿海液化天然气(LNG)和核电等项目,取水口是重要的配套工程,其主要受波浪的作用,取水结构内的波况直接关系到取水口的正常运行.针对某一具体工程实例,对海岸直接取水结构进行了波浪物理模型试验研究,分析不同水位、波向及方案下取水结构内的波况.研究结果表明,随着水位的降低,虽然入射波高减小,但是取水结构内比波高均增大,低水位时取水结构内波况相对不利.波向对取水结构内波况影响较大,与正向和74°向波浪相比,52°向波浪作用下取水结构内比波高均较小.与原方案相比,优化方案一和优化方案二均有效减小了引水流道内的波高,但是进水前池和吸水池内波高减小得较少.%For Liquefied Natural Gas ( LNG) and nuclear power projects established along the coast, the water intake is one important project, which is mainly under wave action, and wave condition in the wave intake has di-rect effect on the normal operation of the wave intake.Based on one specific engineering example, wave physical model test was carried out to study one direct wave intake, and the wave conditions under different water levels, wave directions and plans were analyzed.The results show that though wave heights of low water level are smaller, wave height ratios in the water intake increase with the decrease of the water level, the wave condition in the water intake is relatively bad under relatively low water level.The wave direction has relatively large influence on the wave condition in the wave intake.Compared to the forward (90 degree) and 74 degree wave, wave height ratios are all relatively small under the 52 degree wave action.Compared to the original plan, the first optimizing plan and the second optimizing plan all effectively decrease the wave heights in the inflow channel with wave heights de-creasing relatively small in the inflow forebay and the suction bay.