ORTIA - Rehabilitation Taxiways

Rehabilitation of taxiways at OR Tambo International Airport, Johannesburg, Gauteng. CIDB 8CE. The work to be performed under this contract comprises mainly the rehabilitation of taxiways at OR Tambo International Airport. The following aspects will be addressed in this project: 180m Bravo taxiway section from Runway 03L towards CAT II hold line (Part 1: Concrete: Installation of taxiway centre line lights by either using the Core Existing Pavement, Conduit In Pavement Surface Saw Kerf Method or Core Existing Pavement, Directional Bore For Conduit Method. Installation of Stop Bar lights using the Core Existing Pavement, Conduit In Pavement Surface Saw Kerf Method or Full Depth Pavement Removal For light base and conduit. Where required, reconstruction of supporting layers for the concrete base with 300mm C3 cement stabilised base, 300 mm G6 selected layers and 600mm of Rockfill. Where required, repair of concrete cracks on concrete pavement using high volume load Cementous product. Rehabilitation of taxiway shoulders (17.5m x 2) with 50mm A–E2 modified asphalt in section where support layers and drainage is sufficient. Where required, reconstruction of shoulders with 50mm A-E2 modified asphalt, 150mm AP1 modified BTB asphalt base. Reference existing paint markings and reinstatement before opening of the taxiway. Where instructed the position of the line markings and lights may change. Provision of a sub surface drainage system as per drawing 3961RD04DRA02. 180m Bravo taxiway section from 180m from Runway 03L to CAT II hold line (Part 2: Asphalt: Rehabilitation of pavement section (25m) with 80mm of A-P1 modified Continuously Graded Asphalt and a 220mm EME asphalt base. This will be followed by a 200mm BSM layer on top of a ripped and recompacted roadbed. (Where required, reconstruction of supporting layers 300 mm G6 selected layers and 600mm of Rockfill). Where required, reconstruction of shoulders with 50mm A-E2 modified asphalt, 150mm AP1 modified BTB asphalt base. Where required, removal of taxiway lights before paving.Re-instalment of taxiway lights prior to opening of taxiway for aircraft. Reference existing paint markings and reinstatement before opening of the taxiway. Where instructed the position of the line markings and lights may change. Provision of a sub-surface drainage system as per drawing 3961RD04DRA02. Echo taxilane: The rehabilitation option will consider the current condition of: Where Existing C3 layer is in good condition: Rehabilitation of pavement section (25m) with 80mm of A-P1 modified Continuously Graded Asphalt and a 175mm EME base and aircraft lane section between concrete apron and taxiplane where required. Where Existing C3 layer is not in a good condition: Rehabilitation of pavement section (25m) with 80mm of A-P1 modified Continuously Graded Asphalt and a 220mm EME asphalt base. This will be followed by a 200mm BSM layer on top of a ripped and recompacted roadbed. Provision of a sub surface drainage system as per drawing 3961RD04DRA01. Removal of taxiway lights before paving and re-instalment of taxiway lights prior to opening of taxiway for aircraft. Reference existing paint markings and reinstatement before opening of the taxiway. Where instructed the position of the line markings and lights may change. Juliet A1 & A2 taxiway section: Where required, rehabilitation of pavement section (25m wide) with 80mm of A-P1 modified Continuously Graded Asphalt. Where required, reconstruction of supporting layers with 160mm A-P1 modified BTB asphalt base. Removal of grass on taxiway shoulders (17.5m x 2) and rejuvenating areas which have started to age. Where required, removal of taxiway lights before paving. Re-instalment of taxiway lights prior to opening of taxiway for aircraft. Reference existing paint markings and reinstatement before opening of the taxiway. Where instructed the position of the line markings and lights may change. Drainage improvements on the taxiway sides areas that may include level correction (with reinstatement of topsoil and re-vegetation/hydro seeding, excess grass removal and improvement to drain inlets. The GPS coordinates are -26.1281817, 28.2346551.