高温冻土中孔隙水压力量测初探  

Preliminary discussion on pressure measurement of pore water in warm frozen soil

作　　者：刘世伟[1] 张建明[1] 张虎[1] 苏凯[1] 

机构地区：[1]中国科学院寒区旱区环境与工程研究所,冻土工程国家重点实验室,甘肃兰州730000

出　　处：《甘肃农业大学学报》2011年第6期155-160,共6页Journal of Gansu Agricultural University

基　　金：国家自然科学基金项目(40971045);冻土工程国家重点实验室自主研究课题(SKLFSE-ZY-02-6)

摘　　要：采用2种室内压缩试验方法研究高温冻土在变温变载条件下孔隙水压力的变化规律,即通过恒载变温试验和恒温变载试验分别从升温和加载的角度考虑高温冻土中孔隙水压力的变化,分析了孔隙水压力与温度变化及加载的关系.结果表明:高温冻土中孔隙水压力变化对荷载较为敏感,温度决定了孔隙水压力变化的实效性,在温度越高的条件下,孔隙水压力对加载的响应越快.同时,试验提出了研制探头刺入式微小孔隙水压力计的研究思路,以便更加深入的研究高温冻土中孔隙水压力的变化.Indoor compression tests in two different methods was conducted to study the law of pore water pressure variation in warm frozen soil under variable temperature and variable load.One was the traditional compression test under a constant temperature and a step load（CTCTSL）,the other was the compression test under a constant load and a step temperature（CTCLST）.The relationship between pore water pressure and temperature variation and loads was analyzed simply from different perspectives.Experimental results revealed that pore water pressure variation was just a little sensitive to applied loads.However,temperature was the main factor influencing the timeliness of pore water pressure variation.The higher the temperature was,the quicker the response of pore water pressure was.While,the train of researching thoughts of developing small probe shaping like needles pressure transducer was proposed so as to deeply investigate pore water pressure in warm frozen soil.

关 键 词：孔隙水压力量测 高温冻土 未冻水 粘度 压力传感器 

分 类 号：TU441[建筑科学—岩土工程]