Tenders Are Invited For Repair Of Air Slope Of Dam Wall Kokalane, Ref. No. 25Rp-519А177 in Bulgaria

Work Detail

The Scope Of The Public Order Includes The Implementation Of Construction And Assembly Works For The Repair Of All Concrete Surfaces And Joints Of The Air Slope Of The Kokalane Dam Wall, Iskar Npp, According To A Prepared Work Project. The Main Activities Planned For Implementation According To The Work Project Are: Zone 1 And Zone 3 Cutting Two Slits Measuring 30/30Cm - Only For Zone 1; Washing With A Hydroblaster Until A Clean Surface Is Obtained; Filling Collapses, With Dimensions Greater Than 20/20/20 Cm, With Concrete As For The Main Lining; Revision Of Inter-Block Joint; Application Of Contact Primer, For Old-New Concrete Connection; Execution Of Anchors (Dowels) For Connecting Old New Concrete; Blowing Or Re-Washing The Contact Surface; Installation Of Reinforcement Nets; Installation Of Formwork Panels; Execution Of A New Lining Of Monolithic Concrete With Compaction, Demolding. Zones 2, 4, 6 And 7 Washing With A Hydroblaster Until A Clean Surface Is Obtained; Filling Collapses, With Dimensions Greater Than 20/20/20 Cm, With Concrete As For The Main Lining; Inter-Block Joint Revision – Where Available; Application Of Contact Primer, For Old-New Concrete Connection; Execution Of Anchors (Dowels) For Connecting Old New Concrete; Blowing Or Re-Washing The Contact Surface; Installation Of Reinforcing Nets - Hexagonal, Double Twisted, Wire Diameter Ф3.00Mm; Implementation Of A New Lining Of Shotcrete; Smoothing Of The Fresh Shotcrete To The Levels Indicated On The Drawings In Zones 2, 4 And 6. Zone 5 Clearing Of Tree And Shrub Vegetation; Washing With A Low-Pressure Hydroblaster Until A Clean Surface Is Obtained; Manual Filling Of Collapsed Units Of The Missing Cladding With Suitable Materials; Application Of Contact Primer, For Old-New Concrete Connection; Implementation Of Anchors With A Length Of 80 Cm, To Connect The Existing Stone Cladding With The Shotcrete; Blowing Or Re-Washing The Contact Surface; Installation Of F100 Barricades, 80 Cm Long - Horizontal Drilling; Installation Of Reinforcement Nets;​​​​​​​ Implementation Of A New Cladding With An Average Thickness Of 5 Cm From Shotcrete. Zone 8 Breaking Up Old Flooring With A Deb. 15Cm; Alignment Of The Cleaned Base, With A Slope Of 2% Of The Metal Door; Implementation Of A New Reinforced Concrete Pavement With Deb. 15Cm; Dismantling Of A Metal Door; Installation Of A New Metal Door And Rain Visor. Scooping, Loading And Hauling To A Depot Of Sedimented Material From The Bottom Of The Spillway And The Main Outlet. Sampling And Examination Of Completed Activities To Prove The Results Achieved. The Designated Areas, Details, Technology, Materials And Activities Are Described In Detail In The Working Project, Which The Contractor Will Familiarize Himself With During The Site Inspection.

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