观音岩水电站坝基三维渗流场数值模拟  

Numerical Simulation of Three-dimensional Seepage Field in Dam Foundation of Guanyinyan Hydropower Project

作　　者：程正飞[1] 王晓玲[1] 杨家卫 潘昌勇 杨华 任炳昱[1] CHENG Zhengfei WANG Xiaoling YANG Jiawei PAN Changyong YANG Hua REN Bingyu(State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin 300072, China PowerChina Kunming Engineering Corporation Limited, Kunming 650033, Yunnan, China)

机构地区：[1]天津大学水利工程仿真与安全国家重点实验室,天津300072 [2]中国电建集团昆明勘测设计研究院有限公司,云南昆明650033

出　　处：《水力发电》2017年第1期25-29,共5页Water Power

基　　金：国家自然科学基金项目(51439005;51339003)

摘　　要：坝基渗流是威胁观音岩水电站安全运行的主要问题之一。针对观音岩水电站坝区复杂的地质条件和多重渗控措施,建立较为精细的坝区三维整体计算模型,采用基于计算流体力学(CFD)的三维非稳态水气两相流渗流模型,对正常蓄水位下的坝基三维渗流场进行了数值模拟,并重点分析了典型剖面的渗流特性和渗控措施的渗控效果。分析表明,坝基渗流场中的水头、水力梯度、扬压力、渗流量等基本都在正常范围内,不会对坝基渗流安全稳定构成较大威胁;防渗帷幕和排水系统的渗控效果显著,有效改善了坝基渗流场的分布,渗控布置方案合理有效。The dam foundation seepage problem is a major concern on the stability of Guanyinyan Hydropower Station. A fine overall three-dimensional computation model is firstly established to model the complicated seepage control measures and complex geological conditions of dam foundation in Guanyinyan Hydropower Station. Then, a three-dimensional seepage mathematical model of air-water two-phase flow based on Computational Fluid Dynamics （CFD） approach is developed to simulate the dam foundation seepage field. The simulation results show that the key physical quantities, such as water head, hydraulic gradient, uplift pressure and seepage discharge, are basically within normal limits. The grouting curtains and drainage system can effectively improve the distribution of seepage field, which proves the rationality of seepage control scheme design.

关 键 词：坝基 渗流场 CFD 数值模拟 观音岩水电站 

分 类 号：TV223.4[水利工程—水工结构工程] TV274