Lomé Container Terminal GSI

LCT, contracted PMI Ltd to perform a number of site investigations for the expansion project of Lomé container terminal. Expansion plans involved the construction of a new harbour basin and quay walls for bigger container vessels. The access channel and turning circle were also dredged to deeper depths to accommodate the container vessels with a deeper draft.

Scope of Works

The complete scope of works was executed in a number of stages across a broad time frame. The complete scope of work was as follows:

Marine Surveys:

• Bathymetric surveys
• Side scan sonar surveys
• Sub-bottom profiling
• Sediment sampling
• Magnetometer survey

Offshore Geotechnical:

• 18no Vibrocores
• Grab Samples
• 10no seabed CPTu tests

Onshore Geotechnical:

• 21no onshore boreholes
• 85no onshore CPTs

Marine Conditions Surveys:

• 3no AWAC monitoring buoys installed for 3 month period to obtain local wave, current and tidal data.

Execution

The GSI work was performed using the broad spectrum of PMI’s resources including the following:

• Multicat Vessel PMI Tiger and Geocorer vibrocore machines;
• 200kN Geomil truck mounted CPT Rig;
• Fraste Hydraulic Rotary core/percussion drilling rig;
• Marine survey vessel – PMI Solstice;
• Bathymetric and geophysical surveying equipment;
• Total stations and GPS equipment;
• Professional engineers and support staff

The contract was executed successfully and the quality data obtained from the site investigations helped the Client save a significant portion on the final contract value of the newly constructed port expansion.