Preparing a long term management plan for the future of the Slufter An analysis of the functional,...
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Preparing a long term management plan for the future of the Slufter An analysis of the functional, spatial and geotechnical possibilities Roderik Heerema, MSc Wednesday October 24, 2012
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Introduction
Transcript of Preparing a long term management plan for the future of the Slufter An analysis of the functional,...
Preparing a long term management plan for the future of the Slufter
An analysis of the functional, spatial and geotechnical
possibilities
Roderik Heerema, MScWednesday October 24, 2012
Content
• Introduction• The Port of Rotterdam• Contaminated dredged material management in
the Netherlands• The Slufter• Conclusions
Introduction
DEME
Introduction
Introduction
Introduction
Introduction
The Port of Rotterdam
The Port of Rotterdam
The Port of Rotterdam
• Every year:– €500 Million Turnover– 430 million tons of goods throughput– 34,000 ocean going vessels and 100,000 inland vessels– Third largest port in the world
• Expanding…
The Port of Rotterdam
Maasvlakte 2
Contaminated dredged material managementin the Netherlands
• 3 to 5 million cubic meters of contaminated material dredged yearly
• Several facilities…• Total remaining storage capacity 85 million cubic
meters• Enough for the next 32 years
Hollandsch Diep Ijseloog The Slufter
The Slufter | CDF
• Large scale Confined Disposal Facility• Built in 1987• Storage of contaminated dredged material
The Slufter | Location
The Slufter | Dimensions
6km2km260ha
3.7 miles1.2 miles642 acres
The Slufter | Dimensions
NAP +24m
NAP +6mNAP +2m
NAP -28m
Dredged material
NAP
52m
30m
Total capacity150 million m3
171 ft 98 ft 196 yd³
The Slufter | History
• Why it was built• The “Rhine Research Project”• The Slufter through the years…
The Slufter | History
The Slufter | Today
The Slufter is increasingly losing its function
• Reduced supply of contaminated dredged material– Expected lifetime in 1987 was 15 years– More than 24 years later only 50% has been filled
• Overcapacity• Surplus of space which is not ready for use
The Slufter | Functions
The Slufter | Functions
The Slufter
• Building on dredged material– Clay and silt particles– Very low bearing capacity
Dredged material
Retainingstructure
New landRemaining
storage capacity
A Geotechnical Challenge
The Slufter A Geotechnical Challenge
The Slufter
1:10
400m
A Geotechnical Challenge
The SlufterA Geotechnical Challenge
The Slufter
€€€A Geotechnical Challenge
The Slufter
The principle of dry storage
1. Remove water sheet and lower ground water level
2. Initiate a process of ripening dredged material3. Obtain a layer with sufficient bearing capacity
Ripened dredged material
Dredged material
A Geotechnical Challenge
The SlufterA Geotechnical Challenge
The Slufter | Solution
A long term approach– Use the incoming supply of dredged material as
elevation material– Elevate until the layer has sufficient bearing capacity
and develop from thereon – Lower the ring-dike– Move towards a phased dismantlement of the Slufter
30ha
2017
2022
2032
60ha
120ha
Conclusions
• Accept the current situation!
• Initiate dry storage!
• Use the space!
• Create value!
Questions?
