Observed Ground Pressure Acting on the Lining of a Large-Diameter Shield Tunnel in Sandy Stratum under High Water Pressure

Table 2

Basic parameters of the monitored sections of the project.

Section (ring number)	Section-a (ring 479)	Section-b (ring 1094)	Section-c (ring 1210)	Section-d (ring 1384)
Height of overburden (H) (m)	34.1	14.97	12.9	12.48
Water level on the crown level (Hw) (m)	30.7	42.24	37.36	29.67
Overburden soil depth (H)/tunnel outer diameter (Do)	3.04	1.34	1.15	1.11