Road

Project description:
The project on the I/11 Mokré Lazce road revolved around the section of the I/11 road leading from Mokré Lazce to the border of the districts of Opava and Ostrava, measuring 9.750 km.

The bridge object designated as SO 212 brings the III/46610 road of the I/11 four-lane road. The bridge has three spans, and the single-beam load-bearing structure is made of prestressed concrete.
 
The SO 212 bridge has part foundation on augur piles (O0, P1) and part shallow foundation (P2, O3). All piles are made at 0.90 m of the C25/30 XA1 concrete.

The bridge consists of two supports and two pillars. The end supports consist of a pair of columns with Freyssinet hinges at both ends, each internal support with one pillar embedded in the foundation and with Freyssinet hinges at the top. The load-bearing structure is made of a continuous beam of constant single-beam cross-section with three spans. The structure is connected to all supports with Freyssinet hinges. The full-area bridge insulation is made of fused asphalt sheets on the sealing layer – the area of the insulation being 683 m2. The closing walls between the abutments were concreted only after prestressing the load-bearing structure. A 19-cable anchoring system was used to create the longitudinal prestress of the bridge deck.

Expansion joints are installed on both supports. Monolithic reinforced concrete ledges are made on the sides of the supporting structure and adjoining abutments. The walkable ledge has a 1.1 m high railing with vertical panels installed and is separated from the road with a one-sided steel barrier. A railing barrier is mounted on the other ledge. The lengths of the railings and barriers are 75 m. Under the bridge, stone paving was made into a bed of plain concrete in a thickness of 0.35m - total area 300 m2.