Civil Underwater Construction Archives - DUC Marine Group

Removal of grout blocks

ducmarinegroup — Thu, 14 Jan 2016 16:45:21 +0000

REMOVAL OF GROUT BLOCKS FROM A DIAPHRAGM WALL IN FRANCE

Le Havre, France

During the construction of a new harbour in Le Havre (France), grout blocks adhered to the diaphragm wall at a depth of 22 metres.

DUC came up with a creative solution to remove the blocks that was faster and safer than the original method.

The intention was to use a chain connected to two winches mounted above the work to ‘saw’ the blocks away from the wall. To do this, local divers had to cut grooves in the bottom of the blocks through which the cable could pass.

Using explosives to cut the grooves would have been very time consuming. Therefore, DUC Marine Group was asked if a quicker method was available. As the blocks were made of a fairly hard material, DUC suggested to use our 2500 Bar high-pressure water jet to cut the initial grooves for the cable that would be used to saw through the blocks.

However, the cable ‘saw’ continually broke and little progress was made.

DUC provided the solution of using the water jet to make a 100 x 100 x 10 cm opening between the diaphragm wall and the block from above. A 68-tonne air bag was then positioned in this opening that was then inflated to force the grout block from the wall.

This resulted in the safe removal of the 15 to 45-tonne blocks. The job was concluded to the satisfaction of the client, Dragage Atlantique, who were able to put quay into service on time.

All of the activities were carried out using company equipment, which included a 2500 UHP unit, air bags, a decompression chamber and a Nitrox unit.

Categories: Civil Underwater Construction, Inshore, Offshore, Projects

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Enecogen Rotterdam

ducmarinegroup — Thu, 14 Jan 2016 16:00:32 +0000

ENECOGEN ROTTERDAM

Power Plant, Rotterdam

DUC Marinegroup in cooperation with BAM installed two cooling water inlets for a power plant in Rotterdam.

This was completed to the complete satisfaction of the client.

In addition DUC installed concrete “slides” for the outlets of the cooling water pipes, so prevent the water being pumped back into the harbour from producing too much foam.

Categories: Civil Underwater Construction, Inshore, Maintenance and Repairs

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Mauritanian iron ore jetty

ducmarinegroup — Thu, 14 Jan 2016 15:46:53 +0000

MAURITANIAN IRON ORE JETTY

Mauritania, Africa

During a five-year project, DUC Marinegroup performed maintenance to an iron ore jetty in Mauritania, Africa.

The jetty was protected by anodes that had to be checked. As anodes decay in the course of time, regular maintenance and repair is necessary.

DUC Marinegroup has its own equipment to carry this out, including C.P. meters and wall thickness meters for use under water. Anodes that did not function correctly were replaced or additional anodes were installed.

Categories: Maintenance and Repair, Inshore, Offshore, Cathodic Protection, Civil Underwater Construction, Non-Destructive Testing, Preservation

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Inspect, testing and replacing of anodes

ducmarinegroup — Thu, 14 Jan 2016 15:37:34 +0000

INSPECT, TEST AND IF REQUIRED REPLACE ANODES

Port of Rotterdam and Amsterdam, The Netherlands

In the Port of Rotterdam and Amsterdam, DUC Marine Group regularly checks anodes and replaces them if necessary. Not only in the Netherlands we inspect and replace anodes but all over the world. Regular exchanging of anodes are performed in United Kingdom, Africa and Europe.

Categories: Maintenance and Repairs, Inshore, Offshore, Non-Destructive Testing, Survey and Inspection, Cathodic Protection, Civil Underwater Construction

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M.E.T. pile encapsulation

ducmarinegroup — Thu, 14 Jan 2016 15:29:48 +0000

M.E.T. Pile Encapsulation

Port of Rotterdam, The Netherlands

At the Maatschap Europoort Terminal (M.E.T.) in the 7th Petroleum harbour of Rotterdam, DUC Marinegroup together with Henskens B.V. cleaned the piles on which the sea mooring is built and preserved them both above and below the waterline.

This was done using a company-developed robot jet. This robot is first suspended and then used to clean the piles (using a water jet) both above and below the waterline. A polyester jacket is then wrapped around the pile and sealed. From below, this jacket is flushed out and then injected with two-component epoxy resin.

Categories: Cathodic Protection, Civil Underwater Construction, Inshore, Maintenance and Repairs, Oil and Gas, Preservation

Watch the video:

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Vopak pile encapsulation

ducmarinegroup — Thu, 14 Jan 2016 15:19:18 +0000

VOPAK PILE ENCAPSULATION

Port of Rotterdam, Nederland

At Vopak in the port of Rotterdam, DUC Marinegroup blasted and preserved steel piles in a five-year project by high-pressure water cleaning and installing polyester shells to then inject them with a 2-component epoxy resin so that the shell is glued to the pole. ” is going to be.

This gives the steel pole a kind of paint coating of approx. 1 cm thick. This will stop the pole from rusting on the wind water line.

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Construction parking garage Amsterdam

ducmarinegroup — Mon, 21 Dec 2015 15:34:13 +0000

CONSTRUCTION PARKING GARAGE MAHLER 4

For the construction parking garage mahler 4 in busy Amsterdam.

we carried out underwater concreting at a depth of six metres.

In four sections, a total of 25,000 m3 of concrete was poured.

Categories: Civil Underwater Construction, Concreting, Inshore

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Shell parking garage The Hague

ducmarinegroup — Mon, 21 Dec 2015 08:38:17 +0000

SHELL PARKING GARAGE

The head office of SHELL is located right in the heart of The Hague. This area having little or no parking facilities, a parking garage was built under a busy road. We poured the concrete at a depth of 14 metres.

Categories: Civil Underwater Construction, Concreting, Construction Pit, Inshore

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