Effects of Excavation Gap Filling of Under-1 Crossing Tunnel on Pipelines

Table 5

Sewage pipe measuring point vertical displacement.

Vertical displacement (mm)	Excavation gap (filling)	Excavation gap (is not filled)		Error	Percentage of error
A	−8.06	−11.98	3.92		32.7
B	−7.24	−11.90	3.92		39.15
C	−6.31	−10.89	4.58		42
D	−7.15	−10.89	4.04		36.1