6m高堆石坝坝体内的紊流渗流——现场测量、解析法和数值模拟求解  

Turbulent seepage in a 6-m rockfill dam——field measurements,analytical and numerical solutions

作　　者：沈静[1] 崔弘毅[1] 李涛[1] 

机构地区：[1]国家电力监管委员会大坝安全监察中心,浙江杭州310014

出　　处：《大坝与安全》2011年第6期52-56,共5页Dam & Safety

摘　　要：在挪威北部进行了一系列关于渗流、稳定和溃坝的现场试验,这些试验在不同材质的一系列土石坝中进行。其中一座均质堆石坝,长35m,高6.3m,坝顶宽2.8m,在坝体内发生了紊流渗流。在假定坝体材料为各向同性的多孔介质的前提下,开发了紊流渗流的流量、浸润面的二维解析法,用CFD软件FLUENT进行了数值模拟计算,找出了最佳适配的紊流透水系数,并将解析法和数模计算的结果和现场测量的数据进行了比较。能正确预测紊流渗流是非常重要的,它是影响边坡稳定计算、颗粒冲刷和下游加固措施的重要因素。Field experiments of seepage, stability and dam break have been made in several embankment dams of various materials in Norway. One of the dams is a homogeneous roekfill dam, 35 m long, 6.3 m high and 2.8 m wide on crest. Turbulent seepage occurs in the dam body. Assuming isotropie porous media, an analytical solution in two dimensions is developed of flow discharge and phreatic surface in turbulent seepage. Using the Computational Fluid Dynamics code FLUENT, numerical simulations are made to find the best-fitted turbulent permeability. The analytical and numerical results are compared with data from the field measurements. To be able to correctly predict the turbulent seepage is important, an issue that affects calculations of slope stability, particle erosion and downstream reinforcement measures.

关 键 词：紊流渗流 溃坝 试验 数值模拟 解析法 

分 类 号：TV139.1[水利工程—水力学及河流动力学]