“Minipiling - Access the right solution” Slide 1 Branlow Piling Solutions IWM Presentation 2004...
-
Upload
elwin-jacobs -
Category
Documents
-
view
212 -
download
0
Transcript of “Minipiling - Access the right solution” Slide 1 Branlow Piling Solutions IWM Presentation 2004...
“Minipiling - Access the right solution”
Slide 1
Branlow Piling SolutionsIWM Presentation 2004
Paul Woodfield
Technical Director
Slide 2
“Minipiling - Access the right solution”
Gerrards Cross, London - Mini-piles for new Tunnel
• 2300 No. x 9m deep x 450mm dia. Piles (Temp. Cased/Augered)• 650 kN Compression 100 kN tension 150 kN Shear• Difficult Access. Restricted mast heights• Some possession working• Stiff Clays• 2 x D spacing of piles
Slide 3
“Minipiling - Access the right solution”
• 20 No. Dynamic Load Tests
• 20 No. Static Load Tests
• Verification of vertical capacity
• Automated pile testing (in restricted possession areas)
Gerrards Cross, London - Mini-piles for new Tunnel
Slide 4
“Minipiling - Access the right solution”
Asda (Wal-Mart), Belvedere - Mezzanine Floor Piles
• 750 No. x 20m deep x 273mm or 323mm - Bottom Driven (permanently cased)
• 600 kN compression
• 60 kN shear
• 450mm dia. Core in existing 350mm thick slab
• 10 - 15m of soft alluvium
• Limited Headroom, Restricted Access
Slide 5
“Minipiling - Access the right solution”
• Clients Brief focused on ‘speed’
• 500 No. piles in warehouse in 4 weeks
• Up to 7 rigs
• No Spoil
Asda (Wal-Mart), Belvedere - Mezzanine Floor Piles
• Design Challenge for pile -pilecap connection to cater for eccentric loaidng (CHS + plate)
Slide 6
“Minipiling - Access the right solution”
Sherriffs Court, Glasgow, Scotland
Façade Retention Micropiles
• 300 No. piles x 10m deep
• 40mm dia bar with 75mm dia bit
• 150 - 200 kN tension/compression
• Sands & Gravels
• Tight deflection criteria (H/750)
Slide 7
“Minipiling - Access the right solution”
• Speed (once again) critical - 300 piles installed in 2 weeks
• Preliminary tests carried out to confirm working loads ( dia. approx. 150mm)
Sherriffs Court, Glasgow, Scotland
Façade Retention Micropiles