1. School of Civil Engineering, Xi’an Univ. of Architecture and Technology, Xi’an 710055, China; Shaanxi Key Lab of Geotechnical and Underground Space Engineering, Xi’an 710055, China.
2. School of Civil Engineering, Xi’an Univ. of Architecture and Technology, Xi’an 710055, China; Shaanxi Key Lab of Geotechnical and Underground Space Engineering, Xi’an 710055, China (corresponding author).
3. State Key Laboratory of Frozen Soil Engineering, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China.
4. School of Civil Engineering, Xi’an Univ. of Architecture and Technology, Xi’an 710055, China.