Modification stone pontoon into jetty pontoon - Vuyk Engineering ...

Modification
stone pontoon
into jetty
pontoon
Introduction
On behalf of the Dutch dredging contractor Royal Boskalis Westminster, Vuyk
Engineering Rotterdam has modified the stone pontoon 'Jamuna VIII' into a jetty
pontoon. The pontoon will be used for an harbour extension project at Ras Laffan in
Qatar
Principal dimensions
The principal dimensions of the pontoon are:
Length moulded
Breadth moulded
Depth moulded
230'
60'
14'
= 70,104 m
= 18,288 m
= 4,267 m
Description of system
The pontoon has been equipped with two heavy spuds, ramps, winches etc.
The spud system enables the pontoon to be moored alongside breakwaters.
To enable loading of heavy dump trucks, the pontoon is fitted with two land ramps
at one side of the pontoon, while at the other side a ramp to the stone barge is
installed.
To guide the spuds, large spud wells were created inside the pontoon in such a way
that most of the construction work could be carried out beforehand. The spud wells
could be installed afterwards as soon as the 'Jamuna VIII' became available.
The spuds are equipped with sheaves at the lower side enabling them to be hoisted
and lowered. Once the spuds are lowered, the hoisting wire is slackened to enable
the pontoon to move freely with the tide.
Counterweights are installed in the fixed part of the spud wires, which keep the
wires tight and prevent them from running out of the sheaves.
Large land ramps with hoisting posts are installed, where large dump trucks can
drive across onto the jetty pontoon or via the third ramp straight onto a stone barge.
Furthermore, the pontoon is equipped with the necessary winches for hoisting and
lowering the spuds and the land ramps, mooring winches and dust sprinkling towers
to moisten the delivered stones to prevent too much dust and containers to serve
as office, day-room and machinery spaces.
Follow-up orders
After the modification of 'Jamuna VIII' barge, three other barges were outfitted in the
same way to serve as jetty pontoons.
The principal dimensions of these pontoons are:
Length moulded
Breadth moulded
Depth moulded
100,584 m
30,480 m
6,096 m
91,50 m
27,46 m
5,49 m
85,344 m
24,384 m
5,486 m
Vuyk Engineering Rotterdam B.V.
Naval architects, Marine engineers, Consultants
P.O. Box 1, De Linie 7
2900 AA Capelle aan den IJssel
Phone +31 (0)10 450 25 00
Fax +31 (0)10 458 72 45
Email vuyk@vuykrotterdam.com
Website www.vuykrotterdam.com
VER project 06.163
Values are for presentation only

Modification
stone pontoon
into jetty
pontoon
The vessel will be built in accordance with the rules of the Dutch Inspection of
Transport and Public Works for inland vessels and will sail the Dutch flag.
VER scope of work
On behalf of Boskalis, the following scope of
work was performed by Vuyk Engineering
Rotterdam:
Concept and detail design of the complete
modification, including:
Construction of:
• Spud keeper fore and aft
• Upper part spud keeper
• Counterweight tower
• Hinge points ramps
• Ramps
Arrangement of:
• General Arrangement Plan pontoon
• Hoisting points ramps
Vuyk Engineering Rotterdam B.V.
Naval architects, Marine engineers, Consultants
P.O. Box 1, De Linie 7
2900 AA Capelle aan den IJssel
Phone +31 (0)10450 25 00
Fax+31 (0)10458 72 45
Email vuyk@vuykrotterdam.com
Website www.vuykrotterdam.com
VER project 06.163
Values are for presentation only