State Key Laboratory of Frozen Soils Engineering Northwest Institute of Eco-Environment and Resources CAS Lan-zhou Gansu 730000 China;
State Key Laboratory for GeoMechanics and Deep Underground Engineering China University of Mining and Technol-ogy Xuzhou Jiangsu 221116 China;
Da Xing'anling Observation and Research Station of Frozen-Ground Engineering and Environment Northwest Institute of Eco-Environment and Resources Chinese Academy of Sciences Jiagedaqi Heilongjiang 165000 China;