Under the premise to fully meet with the structural design, water discharging capacity and quality control standard, it is proper to take the TMB tunneling axis as the axis for the concrete lining.

• 在全面满足结构设计、过水能力及质量控制标准的前提下，TBM施工隧洞二次混凝土衬砌轴线采用TBM掘进轴线是合适的。