Le Havre - Phase I.indd

Project
SHEET
port 2000
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 determination to position itself as a leading hub.
features
Client
Port Autonome du Havre
Location
Le Havre, France
Period
August 2003 - December 2004
Contractor
Atlantique Dragage
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 foundations 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.
B
A
A Location map
BAerial view at the beginning of the dredging works.
port 2000
phase I
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.
01 — 2012
The information contained in this data sheet is for guidance purposes only and may be subject to changes. © Boskalis. All rights reserved.
The dredged material was pumped into three reclamation 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.
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.
C
CAerial view close to the end of the
dredging works
D CSD Cyrus
Royal Boskalis Westminster N.V.
PO Box 43
3350 AA Papendrecht
The Netherlands
T +31 78 69 69 000
F +31 78 69 69 555
D
[email protected]
www.boskalis.com