防渗体系破损条件下混凝土面板堆石坝的渗流分析  

Seepage Analysis of Concrete Faced Rockfill Dam under the Condition of Seepage Control System Breakage

作　　者：常东升 王涛 高威棣 李伟猛 张雨萌 张雷[1] 雷红军 CHANG Dongsheng;WANG Tao;GAO Weidi;LI Weimeng;ZHANG Yumeng;ZHANG Lei;LEI Hongjun(School of Electric Power Engineering,Kunming University of Science and Technology,Kunming 650500,Yunnan,China;Sinohydro 7 Bureau Co.,Ltd.,Chengdu 611730,Sichuan,China)

机构地区：[1]昆明理工大学电力工程学院,云南昆明650500 [2]中国水利水电第七工程局有限公司,四川成都611730

出　　处：《水力发电》2024年第9期63-66,117,共5页Water Power

基　　金：国家自然科学基金资助项目(52369022)。

摘　　要：在分析总结多座高混凝土面板堆石坝面板开裂特征的基础上,结合某高混凝土面板堆石坝工程,将局部防渗体系单元作为破损模拟对象,基于等效均质渗透系数法,利用Midas GTS开展了不同破损部位和破损程度条件下大坝的渗流场分析,并研究了垫层和过渡层是否发生破损对大坝渗流性态的影响。通过对大坝渗流量、浸润线形态等方面的分析,研究结果表明:相同的混凝土面板破损部位条件下,破损程度是影响大坝渗流性态的重要因素;当面板破损程度相同,垫层和过渡层未破损时,其防渗能力仍起到关键作用,大坝渗流场变化不明显;当整个防渗体系均发生严重破损时,大坝渗流性态恶化,渗透安全性明显降低。On the basis of analyzing the panel cracking characteristics of several high concrete faced rockfill dams,and combined with a high concrete faced rockfill dam project,the seepage field analysis of the dam is carried out by using Midas GTS in the conditions of different damage parts and damage degree based on the equivalent homogeneous permeability coefficient method when the local seepage control system unit is taken as the object of damage simulation.The influence of whether or not the bedding layer and the transition layer are damaged on the seepage pattern of the dam is also investigated.Based on the analysis of dam seepage volume and infiltration line morphology,the following conclusions are obtained:(a)under the same conditions of panel damage site,the degree of damage is an important factor affecting the seepage flow pattern of the dam;(b)when the panel damage degree is the same,and the bedding layer and the transition layer is not damaged,its seepage control ability of the bedding layer and the transition layer still plays a key role,so the dam seepage flow field changes are not obvious;and(c)when the whole seepage control system are seriously damaged,the dam seepage flow pattern deteriorates,and the infiltration safety is significantly reduced.

关 键 词：混凝土面板堆石坝 防渗体系破损 渗流分析 等效均质渗透系数 渗流量 浸润线 

分 类 号：TV223.4[水利工程—水工结构工程] TV641.43