Design and construction of Approach Trestle and breasting dolphin jetty including pile foundation and substructure.

CLIENT:

MLT MARINE OIL AND GAS LTD

APPROVAL:

NIMASSA / L.C ENGINEER

GEO - STRUCTURAL DESIGN:

Engr. Femi OLOMOLA & Team

SUPERVISION:

MEGA CONCEPT ENGINEER

Soil test

Stages of work

Site visit and dilapidation survey
Estimation of service load
Hydrological and topographic survey
Soil testing [borehole, CPT, SPT, Lab]
Structural design [steel and concrete]
Prefabrication of precaste beams panel
Prefabrication of underwater steel jacket
Geotechnical design and analysis
Bond wall formation
Installing precast beam
driven caisson pile
underwater welding, cutting and alignment
Installing underwater steel jacket at slope gradient.
installing cradle steel track
Concreting and installing concrete ramp floor and shore protection wall
Errection of cradle steel structure
installing pulley block and sling @6000m
Installing electrical powered winch
Launching of marine vessel
Hand over

PROJECT TECHNICAL DATA

Propose marine vessel size = 100m LOA
Propose marine vessel hull type = deep V
Propose vessel weight = 7,000 DWT (Gross)
Cradle vessel carrier SWL = 70,000 KN
Concrete slipway ramp beam SWL = 500 KN
Steel cradle weight and dead load = 160 ton
Support roller 1 SWL = 486 KN (Gross)
Support roller 2 SWL = 550 KN (Gross)
Single line pulley force SWL = 800 KN (Gross)
Steel pile 600mm axial capacity SWL = 500KN
Concrete grade = C25/30/ C30/35 N/mm2
Steel grade = S230
Slipway gradient = 1:2.7 degree
Loading platform service draft at 6m
Slipway cradle service draft at 8m
Safe bearing pressure of foundation soil = 100

Objective:

The objective of this project is to buide a structurally stable slipway platform where marine vessel or ship can be serviced and docked for maintanace activities even with minimal resources that will effect an optimum value.

Graphics and Images design by WEFOS PROJECT PUBLISHING