长江科学院院报2016，Vol.33Issue(6)：41-46,52,7.DOI:10.11988/ckyyb.20150219
考虑太阳辐射的寒区混凝土衬砌渠道冻害机理
Mechanism of Frost Damage of Canal with Concrete Lining in Cold Regions in Consideration of Solar Radiation
摘要
Abstract
Research on the mechanism of frost damage of canal with concrete lining under the influence of solar radi⁃ation in seasonally frozen regions has some limitations. In view of this, we established finite element model with un⁃steady temperature field and phase change based on prototype observation data to analyse the relationship between thermal regime and solar radiation absorption in frozen period. Actual environmental factors, such as solar radia⁃tion, air temperature and wind speed, were considered in the model. The slope of Jinhui main canal’ s E⁃W direc⁃tional segment with concrete lining was taken as a case study. The simulation result indicates that:the lateral asym⁃metric and uneven thermal field of canal foundation is the main cause of canal lining’ s frozen damage in cold re⁃gions;the average daily solar time and solar radiation of southern and northern slopes are also lateral asymmetric and uneven;the average temperature difference of shallow canal foundation (0.4 m) is in polynomial relation with the average solar radiation difference;the maximum temperature difference of canal foundation is in linear relation⁃ship with the depth;the solar radiation absorption coefficients have great influence on the heat exchange of canal foundation;the maximum temperature difference between sunny slope’ s and shady slope’ s lining board surface in⁃creases linearly with the enlargement of solar radiation absorption coefficient;the southern slope’ s frozen depth de⁃creases by 25%and the northern slope’ s by 37%when the solar radiation absorption coefficient increases from 0.65 to 0.8.关键词
太阳辐射/混凝土衬砌渠道/气象参数/阴/阳坡/横向不对称/冻害机理Key words
solar radiation/canal with concrete lininging/meteorological parameters/southern and northern slopes/lateral asymmetry/mechanism of frost damage分类
建筑与水利引用本文复制引用
杨晓松,杨保存,王正中,贺兴宏..考虑太阳辐射的寒区混凝土衬砌渠道冻害机理[J].长江科学院院报,2016,33(6):41-46,52,7.基金项目
国家自然科学基金项目（51168042）；塔里木大学校长基金项目 （）
