Enfidha, Tunisia Deep Water Port

Dewatering design for the construction of a new deep water port with container terminal, quay & access channel

Objective 

On behalf of the Republic of Tunisia, Ministry of Transport, Stuart Wells developed a conceptual groundwater control scheme for the construction of a deep water port at Enfidha.

Scope of Work

Using the site investigation data provided by the client, we produced a dewatering design report which incorporated the following:

• An assessment of ground conditions including hydrogeology and groundwater levels
• Proposed structure details and construction phasing
• Recommendations for any further investigation and identify data gaps/project risks associated with dewatering
• Dewatering design including engineering calculations with estimated radius of influence and abstraction flow rates (pump volumes)
• Detailed dewatering system information including well specifications, power requirements, fuel usage, as well as sections and layout drawings

Solution

The final dewatering design report detailed a six stage deep well dewatering system to match the construction sequence which included the following elements:

• Surface water control measures
• Shallow groundwater control during installation of piling platform
• Main works dewatering. Number and flow rate of the dewatering wells around the perimeter of the excavation works to lower and control groundwater within the upper aquifer
• Automated monitoring network