Enhanced Shear Capacity
A circumferential joint for shield tunnels incorporating a dowel to achieve flexible connection, reducing structural damage during misalignment.
Zhang, Junchen · Yan, Qixiang · Zhao, Yu · Sun, Minghui · Yao, Chaofan · Xu, Hongbin
Tunnelling and Underground Space Technology 2025
Achieves joint flexibility via dowel, reducing damage during circumferential joint dislocation
Reveals two failure modes: concrete shear stage and steel rebar shear stage
Proposes an analytical method for N-Q envelope curves
Optimization design must consider axial force to effectively improve shear performance