Coordinate Monitoring Technology in the Process of Incremental Launching Construction of Curved Steel Box Girder Bridge

Table 2

Comparison of deflection monitoring value and theoretical value of steel box girder.

Construction status	Incremental launching status	Comparison value	Deflection (mm)
Condition 1	After lifting jacks	Theoretical value	12.86
		Monitoring value	8.50
		Limitation value	±20.00
Condition 2	Temporary steel pier unloaded incompletely	Theoretical value/modified theoretical value	−33.10/−64.10
		Monitoring value	−53.20
		Limitation value	±66.67

Note. The theoretical correction value in the second condition is the deflection value corrected according to the method in Section 3.4.