严寒地区冬季运行渠道冻胀融沉特性原型试验研究  

Experimental study on frost heave and thaw sink of winter running channei in the severe cold areas

作　　者：周富强 吴艳 何宁[2] 周成[3] 张桂荣[2] 戴灿伟 

机构地区：[1]新疆水利水电科学研究院,乌鲁木齐830049 [2]南京水利水电科学研究院,南京210024 [3]四川大学水利水电学院,成都610065

出　　处：《南水北调与水利科技》2015年第B02期5-7,62,共4页South-to-North Water Transfers and Water Science & Technology

基　　金：水利部公益性行业科研专项（201301022）;新疆公益性科研院所基本科研业务经费资助项目（KY2014039）;新疆科研机构创新发展专项（2014009）

摘　　要：针对新疆等西北严寒寒冷地区渠道冬季延长供水或全冬季供水，造成渠道底部残余水未能及时排除而结冰或者渠坡结冰的情况下，开展混凝土衬砌渠道原位野外冻胀融沉试验研究，结果表明：冻胀期间沿渠坡面表现出“法向膨胀、切向收缩”的变化趋势，水面线附近的法向变形量在冻胀初期很快完成，渠道底部的冻胀变形则呈缓慢持续增加的趋势；春季，渠坡法线方向均表现出融沉变化趋势，渠坡底部法向的融沉量及融沉速率较大，且其融沉量远大于冻胀量。When the extension of channel water supply in winter or the channel water supply in whole winter in Xinjiang or in the severe cold are as of the northwest region, the residual water in bottom of the channel fail to rule out and so the ice or the canal slope frozen. Under this circumstance, the experimental of the concrete lining channel in situ field frost heaving and thaw sinking is conducted. The results show that during the frost heaving, appearing the trends of ＂Normal Expansion＂ and ＂Tangential Shrinkage＂ along the canal slope; the water line in the vicinity of the normal amount of deformation done quickly in the early frost; frost heave at the bottom of the channel shows a slowly continued increasing trend. In spring, the normal direction of canal slope exhibits the thaw trends, both the thaw sink amount and the thaw sink rate of the normal direction in the bottom of canal slope are large. And the thaw sink amount of the canal slope is much greater than its frost heave amount.

关 键 词：渠道 冻胀 融沉 法线 切向 变形 

分 类 号：TV698[水利工程—水利水电工程]