基于弯流原理的河道生态护坡设计  

Ecological Slope Protection Design of River Channels Based on the Principle of Bend Circulation

作　　者：廖龙龙 LIAO Long-long(Dongyuan County River and Lake Protection Center,Heyuan 517500,China)

机构地区：[1]东源县河湖保护中心,广东河源517500

出　　处：《海河水利》2024年第8期40-44,共5页Haihe Water Resources

摘　　要：为解决落水动物逃生问题,借鉴弯道环流的基本原理进行弯道护坡设计。为进一步探明弯道水流特性,采用ANSYS FLUENT流体仿真软件模拟弯道水流,分别研究60°、90°、120°弯曲角度下的弯道水流特性,得出如下结论:①不同弯曲角度下凸岸流速大于凹岸,且越靠近凸岸顶点流速越大;②弯道角度越大,弯道环流强度越高,整体流态表现越稳定;③不同弯曲角度下,凹岸一侧的静态压力要明显大于凸岸,且随着弯曲角度增大,凹岸静态压力呈递增趋势。基于上述弯道水流特性模拟结论,分别对凹岸和凸岸进行护坡结构设计,并以凹岸侧作为落水动物逃生通道,最终形成基于弯道水流特性的左右岸不对称护坡结构。In order to solve the problem of escaping drowning animals,the basic principle of bend circulation is used for slope protection design in bends.To further explore the characteristics of bend water flow,this article uses ANSYS FLUENT fluid simulation software to simulate bend water flow,and studies the flow characteristics of bend water flow at 60°,90°,and 120°bending angles.The following conclusions are drawn:①the flow velocity on convex banks is greater than that on concave banks at different bending angles,and the closer it is to the vertex of convex banks,the greater the flow velocity;②The larger the bend angle,the higher the intensity of the bend circulation,and the more stable the overall flow pattern;③Under different bending angles,the static pressure on the concave bank side is significantly greater than that on the convex bank,and as the bending angle increases,the static pressure on the concave bank shows a decreasing trend.Based on the simulation results of the flow characteristics in the above bend,slope protection structures were designed for the concave and convex banks,and the concave bank side was used as the escape channel for falling animals,ultimately forming an asymmetric slope protection structure on the left and right banks based on the flow characteristics of the bend.

关 键 词：弯道环流 生态护坡 河道 

分 类 号：TV222[水利工程—水工结构工程] TV861