Feng, Haolan, Fei Ye, Xiaobao Wen, Xingbo Han, Xing Liang, and Pengfei Lei. 2023. “Secondary Grouting Pressure Limit of Shield Tunnels in Loess Strata Based on Bolt Shear Behavior”. Periodica Polytechnica Civil Engineering 67 (1):152-65. https://doi.org/10.3311/PPci.21053.