Overpass in Baku, Azerbaijan

Technological regulations for installation, tensioning, and grouting of ducts were implemented.

The tendons of sections L‑3 are anchored in the anchor heads of the SK-19 joints. Tendons L-2, L-4, and L-5 are joined and fixed using SK-19 joints. Tendons L1 (R1) and L5 (R5) are additionally secured with AKS-19 anchors.

The tendons of section L-3 are tensioned from both ends, while the remaining tendons are tensioned from one end only. This optimizes the stress-strain state of the superstructure.
The minimum distance from the bearing plate axis to the formwork is 250 mm, taking into account the dimensions of the tensioning jacks.

For high-quality grouting, the positions of grouting openings of OS-19 bearing plates are specified by sections and piers, and installation of over-pier duct units with polyethylene tubes is provided, extending 700 mm above the slab for monitoring and discharge of grout residue.