水下基槽模型试验与数值模拟研究

Model experiment and numerical simulation of underwater foundation trench

在河道不断航情况下进行水下沉管施工,保证水下基槽的稳定性尤为重要。结合引江济淮某沉管工程,通过室内模型试验进行了基槽边坡过水试验,利用图像位移法得到了基槽边坡变形特征。利用FLUENT软件,采用欧拉多相流模型模拟水槽内水流、空气、沙子的相互作用。通过模型试验和数值模拟,得到了基槽在水流作用下的位移变化特征和稳定性变化规律。

It is particularly important to ensure the stability of underwater foundation trench when underwater pipe sinking construction is carried out under the condition of continuous navigation.In this paper,rely on the sinking pipe project from Yangtze to Huaihe River water diversion,through indoor model experiment,the overflow test of the foundation trench slope is carried out,and the deformation characteristics of the foundation trench slope are obtained by using the image displacement method.Using FLUENT software,Euler multiphase flow model is used to simulate the interaction of water,air and sand in the flume.Through model experiment and numerical simulation,the displacement variation characteristics and stability variation rules of foundation trench under the action of water flow are obtained.