Construction maintenance and minor repairs of bridges and culverts

The subject of the public procurement contracts awarded within the established dynamic purchasing system will be the construction maintenance and minor repairs of bridges and culverts, specifically the following scopes of work: 1. Bearing maintenance: cleaning of bearing seats from mechanical impurities and dust; cleaning of corroded steel parts of bearings within reach in the given bearing position; anti-corrosion coating of cleaned parts; cleaning and preservation of sliding surfaces; cleaning and preservation of elastomeric bearings; topping up of bearing bedding; repair of bearing blocks and NK projections. 2. Under-bridge remediation and drainage repairs: NK under the bridge; remediation of concrete surfaces of the substructure; remediation of the upper surface of foundations at ground level; remediation of the soffit and side surfaces of the superstructure; remediation of vertical parts of cornices; repair of expansion joints; repair of drainage outlets from drains through the concrete surface of the bridge substructure; filling of diagnostic holes; removal of graffiti coatings; repair of the steel drainage channel of the superstructure; anti-corrosion protection of steel parts on the concrete surface of the substructure and superstructure soffit – superstructure channel consoles, utility pipe brackets, PKO plates, rails in the superstructure soffit, etc.; repair of longitudinal and vertical drainage pipes including compensators; repair or installation of drainage pipes from superstructure voids; repair of drainage pipe outlets and drains in the superstructure soffit; repair of cable conduits. 3. Repairs in the cornice area: remediation of the upper surface of concrete cornices; cleaning of drainage channels and remediation of the internal surface of concrete drainage channels of the superstructure; repair of bridge restraint system elements; repair of public lighting poles on the bridge; repair of noise barriers on the bridge; repair of drains and drainage pipes; waterproofing of the bridge deck; repair of the drainage strip along the cornices. 4. Repairs of expansion joints and pavement: repair and maintenance of bridge expansion joints; repair and maintenance of pavement (crack repair, local waterproofing repair, local wear layer repair); renewal of horizontal road markings. 5. Miscellaneous repairs: landscaping (removal of bushes, tree felling, local refilling of fills and embankments, topping up of topsoil and seeding); modification and repair of watercourses (cleaning, repair or installation of reinforcement, repair or installation of thresholds); modification and repair of paving and reinforcement (cleaning, repair or installation of reinforcement, installation of curbs and bases) – protection around supports, slope protection, protection along wings and backfills behind cornices at the ends of wings, paving behind the cornice of the backfilled structure, collars around the faces of backfilled structures. modification and repair of inspection stairs, sumps, and discharge points (cleaning, surface remediation of stairs, sumps, discharge points, replacement of stair treads, installation of new stairs, repair or installation of sumps and discharge points); modification and repair of drainage chutes and ditches (cleaning, repair or installation of chutes and bottom reinforcement of ditches, repair or installation of outlet structures for back drainage in the slope, cleaning of drainage); modification and repair of road – traffic safety barriers (renewal of PKO, repair or installation of barriers). For the performance of the above-mentioned activities, the provision of appropriate traffic engineering measures will be necessary (e.g., reduction of the number of traffic lanes, narrowing of traffic lanes, restriction of 1 lane on a directionally undivided road).