Sequence P122 - 01

Stage 01 - Initial Position:

step 01 SLS connected to AS

• Stage 00 - Initial Position:
• Span P124-123 erected & all tendons are stressed
•  Span P124-123 on temporary bearings (20mm stroke)
•  Span P124-123 is clear (connection beams & PT brackets are removed on top slab)
•  Front Support (FS) & Rear Support (RS) loaded
•  FS & RS anchored to the bridge by 4 x Ø40mm bars
•  Auxiliary Support (AS) fully retracted (0mm stroke)
• SLS connected to AS
•  Main Girder (MG) centered on each supports (ecc. = 0)
•  Longitudinal fixity pin engaged on RS

Stage 02: Adjust FS height

step 01: Move AS

• 1- Move AS to graduation 22.08m along MG (centered on concrete supports)
• 2- Adjust FS height (7.430m) & tight lock nut: Top jacks stroke = 350mm
• 3- Engage longitudinal fixity pin on FS 
• 4- Release RS anchor bars from the deck
• 5- Adjust RS height (5.467m) & tight lock nut: Bottom jacks stroke = 54 (rear) / 0 (front) mm
• 6- Move Main Winch Trolley (MWT) to graduation 63.50m along MG (above FS)

step 02: Engage AS

• 1- Engage AS in contact with concrete block supports by mean of its vertical hydraulic jacks (stroke = 439mm)
• 2- Load AS to minimum 30bar (+/-10bar) on each jack
• 3- Check verticality of AS
• 4- Engage longitudinal fixity pin on AS

step 03: Unload RS

• 1- Engage AS in contact with concrete block supports by mean of its vertical hydraulic jacks (stroke = 439mm)
• 2- Load AS to minimum 30bar (+/-10bar) on each jack
• 3- Check verticality of AS
• 4- Engage longitudinal fixity pin on AS

Stage 03:  Move AS to graduation 22

step 01: Adjust FS height

• 1- Move AS to graduation 22.08m along MG (centered on concrete supports)
• 2- Adjust FS height (7.430m) & tight lock nut: Top jacks stroke = 350mm
• 3- Engage longitudinal fixity pin on FS 
• 4- Release RS anchor bars from the deck
• 5- Adjust RS height (5.467m) & tight lock nut: Bottom jacks stroke = 54 (rear) / 0 (front) mm
• 6- Move Main Winch Trolley (MWT) to graduation 63.50m along MG (above FS)

Step 02: Load AS to minimum 30bar

• 1- Engage AS in contact with concrete block supports by mean of its vertical hydraulic jacks (stroke = 439mm)
• 2- Load AS to minimum 30bar (+/-10bar) on each jack
• 3- Check verticality of AS
• 4- Engage longitudinal fixity pin on AS

Step 03: Engage longitudinal fixity pin

• 1- Unload RS by mean of its bottom jacks (stroke = 0mm)
• 2- Fully retract RS by mean of chain block (pin position #1)
• 3- Connect SLS to RS
• 4- Remove longitudinal fixity pin on RS

Sequence P122 - 02

Stage 01:  Adjust FS height (7.065m)

Step 01: Adjust AS height

• 1- Adjust FS height (7.065m) & tight lock nut: Top jacks stroke = 25mm
• 2- Adjust AS height (4.725m):Vertical jack stroke = 50mm

step 02: Move RS to graduation 31.08m

• 1- Move RS to graduation 31.08m (centered above S123-SPB lifting inserts)
• 2- Adjust RS height by mean of chain block topin position #2
• 3- Engage RS by mean of its bottom jacks(stroke = 61 (r) / 7 (f) mm)
• 4- Load RS to minimum 30bar (+/-10bar) oneach jack
• 5- Check verticality of RS & tight lock nut
• 6- Anchor RS to the deck by mean of verticalbars
• 7- Engage longitudinal fixity pin on RS

step 03: Remove longitudinal fixity pin on AS

• 1- Unload AS by mean of its vertical jacks fully retracted (stroke = 0mm)
• 2- Connect SLS to AS
• 3- Remove longitudinal fixity pin on AS

Sequence P122 - 03

Stage 01 - Auxiliary Support (AS)  Position

step 01 Rear Support (RS) loaded

• Span P124-123 erected & all tendons are stressed
•  Span P124-123 on temporary bearings (20mm stroke)
•  Span P124-123 is clear (connection beams & PT brackets are removed on top slab)
•  Front Support (FS) & Rear Support (RS) loaded
•  FS & RS anchored to the bridge by 4 x Ø40mm bars
•  Auxiliary Support (AS) fully retracted (0mm stroke)
• SLS connected to AS
•  Main Girder (MG) centered on each supports (ecc. = 0)
•  Longitudinal fixity pin engaged on RS

Stage 02: Adjust FS height

step 01: Move AS

• 1- Move AS to graduation 22.08m along MG (centered on concrete supports)
• 2- Adjust FS height (7.430m) & tight lock nut: Top jacks stroke = 350mm
• 3- Engage longitudinal fixity pin on FS 
• 4- Release RS anchor bars from the deck
• 5- Adjust RS height (5.467m) & tight lock nut: Bottom jacks stroke = 54 (rear) / 0 (front) mm
• 6- Move Main Winch Trolley (MWT) to graduation 63.50m along MG (above FS)

step 02: Engage AS

• 1- Engage AS in contact with concrete block supports by mean of its vertical hydraulic jacks (stroke = 439mm)
• 2- Load AS to minimum 30bar (+/-10bar) on each jack
• 3- Check verticality of AS
• 4- Engage longitudinal fixity pin on AS

step 03: Unload RS

• 1- Engage AS in contact with concrete block supports by mean of its vertical hydraulic jacks (stroke = 439mm)
• 2- Load AS to minimum 30bar (+/-10bar) on each jack
• 3- Check verticality of AS
• 4- Engage longitudinal fixity pin on AS

Stage 03:  Move AS to graduation 22

step 01: Adjust FS height

• 1- Move AS to graduation 22.08m along MG (centered on concrete supports)
• 2- Adjust FS height (7.430m) & tight lock nut: Top jacks stroke = 350mm
• 3- Engage longitudinal fixity pin on FS 
• 4- Release RS anchor bars from the deck
• 5- Adjust RS height (5.467m) & tight lock nut: Bottom jacks stroke = 54 (rear) / 0 (front) mm
• 6- Move Main Winch Trolley (MWT) to graduation 63.50m along MG (above FS)

Step 02: Load AS to minimum 30bar

• 1- Engage AS in contact with concrete block supports by mean of its vertical hydraulic jacks (stroke = 439mm)
• 2- Load AS to minimum 30bar (+/-10bar) on each jack
• 3- Check verticality of AS
• 4- Engage longitudinal fixity pin on AS

Step 03: Engage longitudinal fixity pin

• 1- Unload RS by mean of its bottom jacks (stroke = 0mm)
• 2- Fully retract RS by mean of chain block (pin position #1)
• 3- Connect SLS to RS
• 4- Remove longitudinal fixity pin on RS