水利水电科技进展2017，Vol.37Issue(6)：48-53,6.DOI:10.3880/j.issn.1006-7647.2017.06.009
混凝土坝基防渗帷幕体老化的基本模式及识别指标
Basic patterns and identification indexes for ageing behavior of anti-seepage curtains under a concrete-dam foundation
摘要
Abstract
The long-term safe operation of a dam can be influenced by the ageing of anti-seepage curtains under its foundation.Based on a synthetic analysis method,basic ageing patterns and some indexes of identification are presented.Three kinds of patterns,including a relatively stable pattern,a slow-weakening pattern and a weakening in stage pattern were classified in terms of the relative anti-seepage efficiency.Each pattern has its unique anti-seepage efficiency during the analysis time.Three types of indexes can be used to identify the ageing.The first type is the micro dynamic elements of seepage,including Ca2+,TDS,pH,inorganic and organic matters,which can be used to reveal the ageing mechanisms.The second one is the macro dynamic elements,including the uplift pressure and flow rate,which can be used to identify the ageing degrees and the basic aging patterns.The third type is the numerical analysis indexes,including the saturation index and ratios of the different seepage sources,which can be used to quantify the ageing process.Evaluation systems for the aging behavior of anti-seepage curtains under a concrete-dam foundation can be constructed based on the 3 types of identification indexes.关键词
坝基防渗帷幕体/老化模式/渗流/识别指标Key words
anti-seepage curtains under a dam foundation/ageing patterns/seepage/identification indexes分类
建筑与水利引用本文复制引用
余波,郑克勋,王建平,宋汉周..混凝土坝基防渗帷幕体老化的基本模式及识别指标[J].水利水电科技进展,2017,37(6):48-53,6.基金项目
中国电力建设股份有限公司科技项目(DJ-ZDXM-2014-21) （DJ-ZDXM-2014-21）
国家自然科学基金(41272265) （41272265）
