The monitoring results after the implementation of UHPC lining

The subsidence at the monitoring points aligns with G1, G2, and G3. After the primary support construction of the second layer, the average displacement of the support ranged from 1.2 mm/d to 1.4 mm/d.

Before the invert construction, the average displacement of the support ranged from 1.2 mm/d to 1.7 mm/d. After the invert construction, the average displacement of the support decreased to a range of 0.4 mm/d to 0.5 mm/d.