Infrared radiation method for measuring ice segregation temperature of artificially frozen soils  

作　　者：Zhou Guoqing Zhang Qi Xu Zhiwei Zhou Yang 

机构地区：[1]State Key Laboratory of Geomechanics and Deep Underground Engineering,China University of Mining&Technology,Xuzhou 221008,China [2]Department of Geotechnical Engineering,Tongji University,Shanghai 200092,China

出　　处：《International Journal of Mining Science and Technology》2012年第1期35-40,共6页矿业科学技术学报（英文版）

基　　金：supported by the Key Project of the National Natural Science Foundation of China (No. 50534040);the Project of the National Natural Science Foundation of China (No. 40471021)

摘　　要：In order to study the evolution of the freezing fringe and final lenses of frost susceptible soils and advance the understanding of frost heave and mechanism of frost heave control, we used an open one-dimensional frost heave test system of infrared radiation technology, instead of a traditional thermistor method. Temperatures of the freezing fringe and segregated ice were measured in a non-contact mode. The results show that accurate and precise temperatures of ice segregation can be obtained by infrared thermal imaging systems. A self-developed inversion program inverted the temperature field of frozen soils. Based on our analysis of temperature variation in segregated ice and our study of the relationship between temperature and rate of ice segregation in cooling and warming processes during intermittent freezing, the mechanism of decreasing frost heave of frozen soils by controlling the growth of final lenses with an intermittent freezing mode, can be explained properly.In order to study the evolution of the freezing fringe and final lenses of frost susceptible soils and advance the understanding of frost heave and mechanism of frost heave control, we used an open one-dimensional frost heave test system of infrared radiation technology, instead of a traditional thermistor method. Tem- peratures of the freezing fringe and segregated ice were measured in a non-contact mode. The results show that accurate and precise temperatures of ice segregation can be obtained by infrared thermal imaging sys- tems. A self-developed inversion program inverted the temperature field of frozen soils. Based on our anal- ysis of temperature variation in segregated ice and our study of the relationship between temperature and rate of ice segregation in cooling and warming processes during intermittent freezing, the mechanism of decreasing frost heave of frozen soils by controlling the growth of final lenses with an intermittent freezing mode, can be explained properly.

关 键 词：One-dimensional freezing Final lens Ice segregation temperature measurement Infrared radiation method 

分 类 号：P642.14[天文地球—工程地质学] TH811[天文地球—地质矿产勘探]