航道整治工程软体排压载体的水力特性

软体排是航道整治工程中的基础结构,其水力特性直接影响航道整治工程的护滩效果。通过建立水槽模型,研究软体排压载体附近流场结构、回流区长度、近底流速、紊动流场、切应力等水力特性。结果表明,设置软体排压载体后,近底流速和回流区流速减小,上层流速和水流纵向紊动强度增加,近底层的切应力则明显减小。压载体的设置有利于调节近底水流流态、促进泥沙落淤,提高工程边滩守护效果。

Hydraulic characteristics of soft mattress ballast block in waterway regulation project

Soft mattress is the basic structure in waterway regulation project,and the hydraulic characteristics of soft mattress directly affect the protection effect of waterway regulation project.We study hydraulic characteristics of the software mattress ballast block by establishing the normal tank model,such as the flow field structure,the length of the recirculation zone,the velocity of the bottom,turbulent flow field and shear stress.The results show that software mattress ballast block decreases the flow velocity and shear stress near the bottom,and flow velocity in reflux zone,and increases the upper layer velocity and longitudinal turbulence intensity.The software mattress ballast block can adjust the flow pattern near bottom to promote sediment deposition,and improve the beach protecting effect.