1. Professor, School of Qilu Transportation, Shandong Univ., Jinan 250002, China (corresponding author). ORCID: .
2. Master’s Student, School of Qilu Transportation, Shandong Univ., Jinan 250002, China.
3. Senior Engineer, General Contracting Dept. of Nanjing Metro Line 4 Phase II Project, China Railway Construction, Nanjing, Jiangsu 210000, China.
4. Senior Engineer, China Railway 14th Bureau Group Co., Ltd, Jinan 250101, China.