基于FLUENT的预应力孔道压浆机理与缺陷分析

Analysis on Mechanism and Defect of Prestressed Duct Grouting Based on FLUENT

结合孔道压浆的流体力学机理,以常规曲线孔道和竖向孔道为基本模型,分析了压浆过程中的浆液流动充填及缺陷位置,用FLUENT软件建立了上弯曲线孔道的数值仿真计算模型,计算压浆过程中孔道内浆液的流场分布。结果表明:在曲线孔道曲率发生变化的位置,浆液的流速和压力变化较大;压浆工艺参数与孔道内浆液流体动力学特性不匹配,是导致孔道内缺陷的主要原因。

Based on the hydrodynamic mechanism of duct grouting, the slurry flow and the defect position in the grouting process were analyzed with the conventional curve duct and the vertical duct being the basic model. The numerical simulation model of the upper curve duct was established by the software FLUENT, and the flow field distribution of the slurry in the grouting process was calculated. The results show that the velocity and pressure of the slurry change greatly where the curvature of the duct varies; the parameters of grouting process do not match the hydrodynamic characteristics of the slurry, which is the main reason leading to defects in the duct.