124 monopiles with a diameter of 22 meter

124 MONOPILES FOR ARTIFICIAL ISLAND FOR THE HONG KONG MACAU BRIDGE

In 2011, the Octakong was used to install 124 monopiles with lengths between 40 and 50 meter, weighting between 450 and 650 ton and a diameter of 22 meter.

The monopiles were installed to form two artificial islands for entrance/exit of the tunnel which creates the shipping navigation lane for the Hong Kong Macau bridge. The piles were filled with sand, after which the centers of the islands were drained, back filled and the tunnel dug out.

Application details

Application
Monopile installation
Pile type
Monopiles
Water depth
15m
Penetration
20-30m
Fastest net driving time
7min

PILE DETAILS

Pile type
Monopiles
Pile length
40-50m
Pile weight
450-650t
Pile wall thickness
50mm
Pile diameter
22m
No. of piles
124

PROJECT DETAILS

Period
December 2011
Sea
Pearl River Estuary
Country
China
Location
Macau Bridge, Hong Kong
Market
Nearshore
System/end usage
Bridge
Installation contractor
CCCC Third Harbour Engineering
Type of vessel
Floating sheerleg
Mode
Anchors

Main Reasons for solution choice

NO DIAMETER LIMITATION

NO NEED FOR GRIPPER OR INSTALLATION FRAME

MODULAR DESIGN

SELECTED EQUIPMENT

APE 600B

Equipment configuration
Octakong – 8x APE 600B
Eccentric moment
1,600kgm
Max. line pull
3,000t
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