Deformation Characterisation and Distress Diagnosis of a Metro Shield Tunnel by Adjacent Constructions

Table 2

Crack summation.

Crack width (mm)	Amount	Proportion (%)
< 0.31	197	75.19
0.31 ≤  < 0.38	23	8.78
≥ 0.38	42	16.03
Total	262	100.00