Le Havre - Phase I
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INTRODUCTION Le Havre is the fifth largest container port in Europe and is expanding its facilities: the current 14 quays for container vessels are to be expanded with another 12 (all outside the locks). Port 2000’s rationale centres on Le Havre’s deter- mination to position itself as a leading hub. This project will absorb around 75 percent of the $600 million investment scheme to upgrade and expand container and bulk facilities at Le Havre. The new facilities will receive the largest container vessels, of 7,000 TEUs plus and with draughts of up to 14.5 m. Shoreside projects include three new logistics parks, adjacent to the container terminals and offering over half a million square feet of warehousing. The entire project was awarded to Soletanche Bachy. This company specializes in deepwall foun- dations and associated civil works. Several sub-contractors were approached to perform the other works. The first phase of the Port 2000 master plan comprised of the dredging of the access channel, the construction of a protecting breakwater, the building of quay-walls for 4 berths and the dredging of the basin on the river side of the port. Boskalis’ Atlantique Dragage executed the dredging works for the berths and basin. A B PROJECT SHEET PORT 2000 PHASE I A Location map B Aerial view at the beginning of the dredging works. FEATURES Client Port Autonome du Havre Location Le Havre, France Period August 2003 - December 2004 Contractor Atlantique Dragage
Transcript of Le Havre - Phase I
IntroductIon Le Havre is the fifth largest container port in Europe and is expanding its facilities: the current 14 quays for container vessels are to be expanded with another 12 (all outside the locks). Port 2000’s rationale centres on Le Havre’s deter-mination to position itself as a leading hub.
This project will absorb around 75 percent of the $600 million investment scheme to upgrade and expand container and bulk facilities at Le Havre. The new facilities will receive the largest container vessels, of 7,000 TEUs plus and with draughts of up to 14.5 m. Shoreside projects include three new logistics parks, adjacent to the container terminals and offering over half a million square feet of warehousing.
The entire project was awarded to Soletanche Bachy. This company specializes in deepwall foun-dations and associated civil works.
Several sub-contractors were approached to perform the other works.
The first phase of the Port 2000 master plan comprised of the dredging of the access channel, the construction of a protecting breakwater, the building of quay-walls for 4 berths and the dredging of the basin on the river side of the port. Boskalis’ Atlantique Dragage executed the dredging works for the berths and basin.
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Project SHeetPort 2000PHASE I
A Location mapB Aerial view at the beginning of the dredging works.
feAtureS
Client Port Autonome du Havre
Location Le Havre, France
Period August 2003 - December 2004
Contractor Atlantique Dragage
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Royal Boskalis Westminster N.V.PO Box 43 3350 AA Papendrecht The Netherlands
T +31 78 69 69 000F +31 78 69 69 555
[email protected] www.boskalis.com
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WorkIng metHod The Cutter Suction Dredgers Haarlem and Cyrus were deployed to execute the works. The Haarlem first dredged the top layer (mainly sand). The Cyrus took over for the rougher gravel part.
The 12,900 kW cutter suction dredger Cyrus is one of the three largest cutter dredgers in the Boskalis fleet. Cyrus began by dredging for the new berths. The dredging required for Berths 1 and 2 was completed in July. The big cutter dredger then switched to the eastern port area and dredged Berths 3 and 4. Work then continued on dredging the turning basin. The berths were being dredged to -15.5 m. and the turning basin to -16.0 m.
The dredged material was pumped into three rec-lamation areas, with a pumping distance varying between 2 km for the gravel and 4.5 km for the sand.
The dredging depth was 15.50 and 16.0 CMH, leading to occasional dredging depths upto 25.5 m at high tide.
Port 2000PHASE I
cHAllengeS The project presented itself with some challenges:
� The abrasive behaviour of the material dredged required some careful pre project planning. All floating lines were reinforced with hard steel liners. The deployment of double shorelines to the sandfills was required to ensure a good measurement and rotation programme of the pipelines on the sandfills.
� Significant volumes were dredged in relatively narrow, confined areas. � Working in positions exposed to hostile weather; swell and other water
parameters influenced the work pattern. � The military use of the area during the second World War. All areas
dredged were investigated by the on-site shore ordnance disposal team for old munition.
� Different routings of the pipelines for the reclamation areas were planned to achieve the shortest pumping distance possible.
� The project’s environmental parameters included restrictions on suspended solids from the sandfills. The most important parameter stated that suspended solids must not exceed river levels by more than 100 mg/litre. The nature of the material assists in this respect, with very rapid settling. The sandfills had to be installed in such a way that the quantity of suspended solids flowing back in the river was minimal.
� Dredging operations were affected by strong tide differences, up to 8 m. � Many trials were done with new materials to be able to resist to the high
wear due to the coarseness of the material.
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c Aerial view close to the end of the dredging works
d CSD Cyrus
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