A57 Reinforced Earth Abutments (DESIGN ONLY )

Description of the subcontract works

• 1)Reinforced soil abutment TWs design required to support temporary bridge over A57 - see previous TWs drawing 0002 Rev C3 attached for solution similar to this we are looking to complete.
• 2)A57 TWs loadings as per PDF annotated drawing attached "A57 Mottram - Temporary Bridge Reinforced Abutment LOADS Rev 1"
• 3)Main loads to note are:
• i.RC bankseat located on top of reinforced soil abutment - see TWs drawing 0011 Rev P1 attached from other scheme for 70m clear span temporary bridge, assume RC bankseat 1m deep subject to TWs

detailed design

• ii.Assume PLAN area RC bankseat = 10m (transversally across temporary bridge) x 2m (along long

length temporary bridge) = 20m2

• iii.MAX GBP, Z vertical @ 110kN/m2
• iv.MAX horizonal load, X @ 726kN
• 4)Temporary bridge to have 6.00m headroom clearance to soffit bridge deck with deflection from existing carriageway level
• 5)Reinforced soil abutment height = 1m buried below egl + 5m above egl + 0.4m temporary bridge deflection (assumed) = 6.4m height
• 6)1m road side face reinforced soil abutment to face RC bankseat
• 7)2m non-road side face (not approach ramp side) to face RC bankseat
• 8)Reinforced soil abutment faces to be vertical or nearly
• 9)PLAN area main block reinforced soil abutments = 14m (East to West) x 8m (North to South), distance to required geogrid tail length
• 10)TWs design life < 2 years
• 11)Reinforced soil abutment fill 6F5 quarried material (preferable)
• 12)Price to include TWs design and materials supply ONLY
• 13)Suggested installers information to be passed on for BB to contact to discuss installation
• 14)Price to also include for:
• i.AIP TWs input for temporary bridge reinforced soil abutments element
• ii.AIP DRN comments reply support to temporary bridge reinforced soil abutments element
• iii.AIP Certificate review and signature (CEng MICE signature required)
• iv.GDR input
• v.TWs design calculations - provision of these on completion of TWs design
• vi.TWs CAT 3 Check comment support to temporary bridge reinforced soil abutments element
• vii.Site visits = allow 2No

Additional information: Note: This is only an expression of interest for the time being, ITT documents will not be posted via contracts finder