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DATA2015-12-06 Ashghal Presentation 2
- 1. Leighton Qatar Al Jaber Engineering JV
- 2. Leighton Qatar Al Jaber Engineering JV NEW ORBITAL HIGHWAY CONTRACT 3
- 3. Leighton Qatar Al Jaber Engineering JV NEW ORBITAL HIGHWAY CONTRACT 3 Junction 7 2*5 (2+3) Main Bridges: 700m total length, 16 spans, 2 Ramp Bridges: 1 450m total length, 35 spans,
- 4. Leighton Qatar Al Jaber Engineering JV NEW ORBITAL HIGHWAY CONTRACT 3 2 Ramp Bridges: 780m total length, 18 spans, Junction 8
- 5. Leighton Qatar Al Jaber Engineering JV NEW ORBITAL HIGHWAY CONTRACT 3 2*6 (3+3) Main Bridges: 620m total length, 16 spans, 2 Ramp Bridges: 1 400m total length, 34 spans, Junction 9
- 6. Leighton Qatar Al Jaber Engineering JV Junction 10 2 *1 Main Bridges: 260m total length, 8 spans, 2 Ramp Bridges: 1 280m total length, 33 spans,
- 7. Leighton Qatar Al Jaber Engineering JV Junction 11 2 *2 (3+3) Main Bridges: 520m total length, 16 spans,
- 8. Leighton Qatar Al Jaber Engineering JV Ramp Bridges Typical Details Plan, Elevation and Cross section of typical module (Junction 7) Constant width (13.60m) and constant depth (2.60m) for all ramp bridge boxes Weight between 55 & 87tons
- 9. Leighton Qatar Al Jaber Engineering JV Main Bridges Typical Details Segments stitched together transversely to create varying widths required for each Main Bridge Constant width (7,00m) and constant depth (2.35m) for all main bridge boxes Weight between 48 & 69 tons Plan, Elevation and Cross section of typical module (Junction 9)
- 10. Leighton Qatar Al Jaber Engineering JV Precast Yard Location
- 11. Leighton Qatar Al Jaber Engineering JV Precast Yard Decomposition PRODUCTIONDIRECTION REBAR AREA CASTING AREA FINISHING AREA STORAGE AREA
- 12. Leighton Qatar Al Jaber Engineering JV Stage of Precasting oRebar Cage Assembly oSegment Casting & Curing oSegment Finishing oSegment Storage
- 13. Leighton Qatar Al Jaber Engineering JV WHAT IS NEEDED? Materials Manpower Special Team for Civil & PT Works Rebar & Formwork Shop Drawing Equipment: Gantry Crane 100t 3u Tower Crane 8,2t @ 40m 2u Regar Jig 8u* 3 lines Rebar-Cage Lifting Beam Segment Steel Skeleton
- 14. Leighton Qatar Al Jaber Engineering JV Segment Casting & Curing 1. Rebar Cage Positioning in Casting cell 2. Adjustment cover, insert, opening PT items, 3. Close Formwork, 4. Order & Delivery of Concrete, 5. Concrete placement, 6. Curing Compound: a) 12 hours water curing, b) After 12 hours Application of Curing Compound application, 7. Stripping Formwork after12 hours shift mash-cast segment with manipulator, 8. After 36hours lifting Segment,
- 15. Leighton Qatar Al Jaber Engineering JV Segment Finishing 1. Curing Compound application on Segment Bottom Slab, 2. Segment Finishing, 3. Segment lifting,
- 16. Leighton Qatar Al Jaber Engineering JV Segment Storage 1. Segment Storage, 2 layers, 2. Storage 28days, 3. Segment Lifting to trailer for erection site,
- 17. Leighton Qatar Al Jaber Engineering JV Precast Yard Moulds & Production Rate Moulds Ramp Bridges: 1 434 Segments No. of Moulds = 8 6 Field Segments + 1 Pier + 1 Expansion Joint For all Casting Cells the installation & commissioning are done Main Bridges: 846 Segments No of Moulds = 5 2 Field Segment + 1 Deviator + 1 Pier + 1 Expansion Joint 1 Field Segment casting cell Installation & commissioning done The other casting cells the installation is ongoing Production Rate: Field and Deviator segment = 1 segment per mould per day 9 Segments/Day Pier and Expansion Joint = 1 segment per mould every 2 days 2 Segments/Day Transportation of Segments: Ramp Bridges: 6 Trucks * 2 trips/ day by 2 shifts 24 Segments/Day Main Bridges: 6 Trucks * 2 trips / day 12 Segments/Day
- 18. Leighton Qatar Al Jaber Engineering JV Erection Segments Ramps Bridges Segments are transported one by one to site and lifted to their final position. This erection process will involve: 1.Lifting the segment off the transport truck using special equipment or crane to place them to their final position in the superstructure. 2.Temporarily hanging or supporting the segment from temporary works 3.Once all the segments are in the final position, they are joined and post-stressed to form the permanent monolithic superstructure For NOH Contract 3 - The most effective method to construct the ramps with precast segments is to use the: Span by Span Method with an Underslung Launching Gantry The first launching girder is under delivery at Ramp Bridges Junction 8 The second are under fabrication delivery planned before the end of this year .
- 19. Leighton Qatar Al Jaber Engineering JV Erection Sequence Ramps Bridges Launching Gantry Underslung Precast segments Typical span by span erection with Underslung Launching Gantry And crawler cranes 2 units of 220tns Supplier of Crawler Crane AERTSSEN Production Rate: 2,5 days by span
- 20. Leighton Qatar Al Jaber Engineering JV Erection Sequence Ramps Bridges
- 21. Leighton Qatar Al Jaber Engineering JV Erection Sequence Main Bridges Segment placement by use of crawler cranes of 200 tons Main Bridge Erection works on Falsework Production Rate: 5 days by line
- 22. Leighton Qatar Al Jaber Engineering JV Erection Sequence Main Bridges Erection over Salwa Road with 2 x Portals
- 23. Leighton Qatar Al Jaber Engineering JV NEW ORBITAL HIGHWAY CONTRACT 3 Thank you for yourThank you for your attentionattention