空隙率对丁坝周围水位影响数值模拟研究  

Numerical simulation of influence of porosity on water level around spur dike

作　　者：喻涛[1,2] 段秋铅 王平义[1,2] 芦冉 刘倩颖 YU Tao;DUAN Qiu-qian;WANG Ping-yi;LU Ran;LIU Qian-ying(Key Laboratory of Hydraulic and Waterway Engineering of Ministry of Education,Chongqing Jiaotong University,Chongqing 400074,China;National Engineering Research Center for Inland Waterway Regulation,Chongqing Jiaotong University,Chongqing 400074,China;Chongqing General Hydrological Monitoring Station,Chongqing 400014,China)

机构地区：[1]重庆交通大学,水利水运工程教育部重点实验室,重庆400074 [2]重庆交通大学,国家内河航道整治工程技术研究中心,重庆400074 [3]重庆市水文监测总站,重庆400014

出　　处：《水运工程》2022年第7期118-125,共8页Port & Waterway Engineering

基　　金：国家重点研发计划项目(2018YFB1600403);重庆市教育委员会科学技术研究项目(KJQN201800737);国家内河航道整治工程技术研究中心开放基金项目(SLK2018B05)。

摘　　要：丁坝是航道整治常用的整治建筑物之一,实际工程中多采用散抛石丁坝,此类丁坝具有一定透水性,不同的空隙率对改善透水丁坝附近水位具有不同的效果。基于计算流体力学FLOW-3D软件,研究空隙率对透水丁坝坝身段、坝头前端以及主流带区各个位置水位变化影响。结果表明:在丁坝坝身段、坝头前端以及主流带区水位与空隙率变化关系基本一致,丁坝上游段,当空隙率小于15.4%时,水位随空隙率增大先降低后升高,当空隙率大于15.4%时,水位减小至某一值后趋于稳定;坝体轴线处,水位随着空隙率增大呈现上下波动;各透水丁坝坝后水位均高于实体丁坝,但坝后水位与空隙率并非呈正相关变化。Spur dikes are one of the commonly used waterway regulation structures,and scattered riprap spur dikes are especially popular in actual projects.This type of spur dike has a certain degree of water permeability,and different porosity has different effects on improving the water level near the permeable spur dike.Resorting to the computational fluid dynamics software FLOW-3D,this paper studies the influence of porosity on the water level changes at different parts of a permeable spur dike,including its body,the front of its head,and its main flow area.The results show that the variations of water level with porosity at those parts are similar.In the upstream section of the spur dike,the water level first decreases and then rises as porosity increases when the latter is lower than 15.4%.When the porosity is higher than 15.4%,it decreases to a certain value and then stabilizes.At the axis of the dike body,the water level fluctuates up and down with increasing porosity.The water level behind each permeable spur dike is higher than that in the case of solid spur dikes.Nevertheless,water levels behind the dikes are not positively correlated with porosity.

关 键 词：空隙率 透水丁坝 水位 数值模拟 

分 类 号：U617.9[交通运输工程—船舶及航道工程]