RT Journal T1 Laboratory investigations of the thermal strain of frozen soils, using fiber-optic strain gauges based on Bragg gratings A1 Aleksey Marchenko, Nicolai Vasiliev, Artem Nesterov, Yuri Kondrashov, Nikolay Belyaev PB Sciences in Cold and Arid Regions FD 2017-06-01 YR 2017 JF Sciences in Cold and Arid Regions JO Sciences in Cold and Arid Regions VO 9 IS 3 SP 192 DO 10.3724/SP.J.1226.2017.00192 K1 thermal expansion;frozen soil;sand;clay;fiber-optic sensors;hysteresis LK {http://www.scar.ac.cn/CN/article/article_77.shtml}