Technical Advances of Temporary Facilities for the Failure Prevention of Large-Span Cantilever Casting Construction of Mountainous Concrete Box-Type Arch Bridges
Table 3
Comparison objects of temporary prestressing between the east and west bank cases.
Case
Temporary prestressing schemes
Segment no.
Stress control index (MPa)
Tensioning stress (MPa)
East bank
West bank
Upper
Lower
1
Single-segment tensioning
Two-segment tensioning
10, 11
0.5
0.5
1395
2
Bottom plate prestressing
Top plate prestressing
12, 13
0.5
0.5
1395
3
Prestressing in both the plates
Top plate prestressing
14, 15
0
0
1395
4
The distances from the upper edge to the prestressing resultant points are 15 cm and 10 cm, respectively
