About This Project
CMP were contracted to install 8nr +2m dia tubular steel mooring piles and 2nr +2m dia tubular steel dolphin piles to support Liverpool Cruise Liner berthing structure.
- Dismantle and dispose of old timber mooring structure
- Exploratory boreholes taken at pile positions using jack-up barge to establish ground conditions
- Jack-up barge with drilling rig towed into pile position
- 2.4m temporary pile casing lifted into position using crane barge and vibratory driven to refusal
- 2.3m rock socket drilled through temporary pile casing (deepest socket approx. 11m)
- 40m+ tubular steel pile weighing 90-100 tonnes lifted into rock-socket and secured
- Grout poured between temporary pile casing and permanent pile
- Temporary pile casing removed over pile head
Plant hire: Jack-Up barge. S-50 ‘Z-Jack General’
The “Z-Jack General” is a four leg hydraulically operated self-elevating platform, designed for inshore or sheltered water operations with a maximum depth of 24 metres at mean water. A local control unit positioned at each leg allows for individual operation of legs.
The legs have a number of jointed connections that allow different lengths to be utilised to suit the task and site requirements. The entire Jack-Up barge consists of modular sections that can be road transported and assembled on site.
- Platform dimensions 21/15 x 15 x 1.52m
- Draft 0.8m
- Dead Weight 200 Tons inclusive of all fuels and legs
- Gross Tonnage 103
- Building Year 1989
- Clear deck capacity 144 metres squared approx.
- Deck Capacity 100 Tons 20m above seabed
Jacking system details
- Type 4 Legs Hydraulics
- Lifting Capacity 2 x 42 ton jack per leg
- Maximum Stroke 0.6m
- Leg length 22.3m
- Leg diameter 762mm (30″)
- Maximum working pressure 2000 PSI = 144kg/cm
- Power Pack 5 Cylinder deutz x 2