新型透空式块体促淤堤断面阻力特性试验  

Experimental study on resistance characteristics of novel porous block siltation promotion embankment

作　　者：朱亮 谢云飞 ZHU Liang;XIE Yun-fei(Jiangsu Shipping College,Nantong 226010,China)

机构地区：[1]江苏航运职业技术学院,江苏南通226010

出　　处：《水运工程》2022年第12期55-61,共7页Port & Waterway Engineering

基　　金：南通市科技计划项目(MSZ21008);南通市科技计划项目(MSZ21096)。

摘　　要：针对一种空心四面块体促淤堤断面开展阻力特性的试验研究,并与传统抛石加护面块体促淤堤试验结果进行了对比。结果表明:1)当水流雷诺数较小、可以形成促淤堤的非淹没状态时,在同一水流雷诺数条件下,空心四面块体促淤堤断面阻力系数可以用2段折线表达,折线的拐点基本对应于促淤堤的临界淹没状态,随着水流雷诺数增大,2段折线的斜率逐渐趋同;2)当水流雷诺数较大、无法形成促淤堤的非淹没状态时,在同一水流雷诺数条件下,空心四面块体促淤堤断面阻力系数可以用单一直线表达;3)提出可用于计算空心四面块体促淤堤断面阻力系数的方法,该方法也适应于一般透水堤。An experimental study on the resistance characteristics of a hollow tetrahedron siltation promotion embankment is carried out,and the experimental results are compared with those of experiment on traditional siltation promotion embankment which is composed of riprap and armor block.The results show that:Firstly,when flow Reynolds number is small enough to bring about the non-submerged state of siltation promotion embankment,the resistance coefficient can be described using two broken lines under the same flow Reynolds number,the turning points of which are in accordance with the critical submerged criterion.With the increase of flow Reynolds number,the slopes of two broken lines get closer.Secondly,when the flow Reynolds number is too large to reach the non-submerged state,the resistance coefficient can be described using the single line alone under the same flow Reynolds number.Thirdly,the method of calculating the resistance coefficient is proposed which is also suitable for the normal permeable embankment.

关 键 词：空心四面块体 促淤堤 阻力特性 临界淹没状态 计算公式 

分 类 号：U656[交通运输工程—港口、海岸及近海工程]