不同人工冻结方向条件下土的冻胀试验研究(英文)  

Test Research on Frost Heave by Artificial Freezing with Different Freezing Directions

作　　者：于琳琳[1] 徐学燕[1] 吉植强[1] 

机构地区：[1]哈尔滨工业大学土木工程学院,黑龙江哈尔滨150090

出　　处：《四川大学学报（工程科学版）》2009年第6期58-62,共5页Journal of Sichuan University (Engineering Science Edition)

基　　金：国家自然科学基金资助项目(40571032)

摘　　要：为了解决人工冻结施工中的冻胀问题,从工程实际出发,进行不同人工冻结方向以及不同冻结温度模式(恒温和正弦变温)的冻胀试验研究,并对试样的温度场、冻胀量、含水率及干密度等进行对比分析。试验结果表明:在相同试验条件下,正弦变温冻结试样的冻胀量值最小,自下而上恒温冻结试样的冻胀量最大;自上而下恒温冻结、正弦变温冻结和自下而上恒温冻结试样的含水率和干密度变化趋势相同,可知在相同试验条件下,冷端输出的冷能一定时,人工冻结试样内部水分迁移规律将相同。Under artificial freezing conditions,including different freezing directions,as well as the constant and sine varying freezing temperature models,the frost heave was studied.The effects of temperature field,frost-heave amount,water content and dry density on the frost heave were analyzed.The test results indicated that the frost heave amount of the top-bottom sine freezing sample was the least and that of the bottom-top constant freezing sample was the most,under the same experimental conditions.The distrib...

关 键 词：人工冻结 冻结温度模式 温度场 冻胀量 

分 类 号：TU445[建筑科学—岩土工程]