长周期强浪条件下防波堤结构优化设计  

Optimal design of breakwater structures under long-period and rough wave conditions

作　　者：方波 郭隆洽 杨小龙 李伟仪[1] 陈良志[1] FANG Bo;GUO Longqia;YANG Xiaolong;LI Weiyi;CHEN Liangzhi(CCCC-FHDI Engineering Co.,Ltd.,Guangzhou 510230,China)

机构地区：[1]中交第四航务工程勘察设计院有限公司,广东广州510230

出　　处：《水运工程》2023年第12期40-45,共6页Port & Waterway Engineering

摘　　要：针对长周期强浪海况下越浪水体对防波堤内坡护面块体冲击作用大的问题,以地中海某油气港改扩建工程为例,通过对局部三维物理模型试验和水利行业标准的研究,提出加宽挡浪墙底板后沿形成悬挑防护结构的优化方案,并分析其稳定性结果。结果表明,挡浪墙底板加宽悬挑部分可以掩护内坡顶部护面块体免于越浪水体的直接冲击作用;超出悬挑后沿的护面块体位于水面以下,当水深达到一定厚度时,可消减越浪水体大部分能量,护面块体稳定性满足要求。相比于加高挡浪墙和加大内坡护面块体,悬挑防护方案增加成本低、防护效果好。Aiming at the problem of the strong impact effect of overtopping on the armour blocks of the breakwater's rear slope under long-period and rough waves,taking a Mediterranean petroleum and natural gas terminal expansion project as an example,we propose an optimized scheme of a cantilevered protective structure by widening the rear edge of the crown wall's bottom slab,carry out three-dimensional physical model tests and study of water conservancy industry standards,and analyze the stability results of this scheme.The results show that the cantilevered part,by widening the bottom slab of the crown wall,can shield the top of the rear slope armour blocks from the direct impact of overtopping.The armour blocks beyond the cantilevered part are located below the water surface.When the water depth is thick enough,it can reduce most of the energy of overtopping,thus satisfying the stability requirements of the armour blocks.Compared to increasing the elevation of the crown wall or enlarging the armour blocks of the rear slope,the cantilevered protection scheme has a low cost and good protective effect.

关 键 词：长周期强浪 块体稳定 消能水垫 防波堤 

分 类 号：U652.74[交通运输工程—港口、海岸及近海工程]