Combined Wall Zeebrugge (BE)

Description

Published: April 16th, 2018

Sterk provided a large combined wall construction to serve as a quay wall in the port of Zeebrugge. More than 200 tubular piles measuring approx. 30 metres and interlocking sections of approx. 20 metres had to be driven into the ground. This resulted a combi wall of more than 600 metres.

Work was carried out as part of the extension of the Hanze Terminal, one of Europe’s most important hubs for the import and export of vehicles.

Sterk is not new to building combi walls, but works on this scale are an exception. Not only did the job involve the construction of 220 tubular piles measuring up to 30 m long and 1.3 m in diameter, but also the 20 m long interlocking sections. The combi wall had to be anchored, and so we installed anchor plates attached to the combi wall by means of anchor rods as well. In this way, the entire construction became even more robust.

For this job, it was particularly important to take a close look at the various processes in order to complete the work in the most effective manner. By taking a smart look at the entire chain from transport through to installation, we could make better use of the time required for driving tubular piles into the ground and therefore work relatively fast.

The Hanze Terminal (Quay 521 to 527) is used for processing Toyota vehicles in combination with other volumes, and is a port of call for ships from all over the world. The construction of the quay wall was completed in 2017. The extension of the quay wall in the southern inlet was needed to improve the infrastructure. In this way, port authorities hope to meet the challenges of increasing vehicle-handling activities.

Project details

Contractor: Besix
Location: Zeebrugge (BE)
Contract value: € 1.000.000 +
Start date: June2016
End date: September 2016

Techniques used

Anchoring constructions, Combi sheet pile walls, Construction work, Declutching detectors, High-frequency vibration/extraction

Omschrijving

Voor de realisering van de nieuwe brug over het Van Harinxmakanaal in het Friese Dronryp kwamen alle expertises van Sterk zo ongeveer samen. Damwanden, buis- en heipalen, waterwerk, (prefab) constructiewerk en verankering: het kwam allemaal aan bod.

Vervanging van de 75 jaar oude brug over het kanaal was al langere tijd noodzakelijk vanwege de slechte staat waarin die verkeerde. Verkeer met een totaalgewicht van 30 ton of meer mocht er sinds 2014 al niet meer overheen en vanwege veiligheidsaspecten was bediening bij windkracht zes of meer ook niet toegestaan.

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Gebruikte technieken

Opdrachtgever

Besix

Locatie

Zeebrugge (BE)

Contractwaarde

€ 1.000.000 +

Start datum

June2016

Eind datum

September 2016

Sterk Sterk Metaal Remmingwerk (10 Van 30)

Sterk - vervangen brug Dronryp - Remmingwerk & Damwand

Nieuwe brug over het Van Harinxmakanaal
Voor de realisering van de nieuwe brug over het Van Harinxmakanaal in het Friese Dronryp kwamen alle expertises van Sterk zo ongeveer samen. Damwanden, buis- en heipalen, waterwerk, (prefab) constructiewerk en verankering: het kwam allemaal aan bod.

440 meter aan stalen damwand
In opdracht van Oosterhof Holman tekende Sterk voor vernieuwing van de verouderde oeverbeschoeiing en bracht het vanaf een ponton op het water met een hydraulische kraan ongeveer 440 meter aan stalen damwand aan. De constructie is verstevigd met meer dan honderd klapankers en 440 meter ankergording, wat ook het nodige constructie- en laswerk op locatie met zich meebracht.

Ook plaatsten we vanaf een ponton op het water de betonpalen die dienen als fundering van de middenpijler van de brug. Daarnaast plaatste Sterk – eveneens vanaf het water – buispalen voor het remming- en geleidewerk en stalen damwand ten behoeve van de bouwkuipen voor de landhoofden.

Het gereedmaken van de buizen voor het remming- en geleidewerk was een uitdagende klus. Met een mal zijn de geplaatste buizen op locatie eerst in de juiste vorm gesneden. Zo kon de horizontale buis, die dient als verbinding tussen de verticale buizen, mooi sluitend worden geplaatst. Aansluitend zijn platen in de buizen gelast om ze te verstevigen en werden de buizen aan de bovenkant dichtgelast.

Het remmingwerk zelf is volledig prefab gemaakt in de lashal van Sterk Metaal in Drachten. De immense gevaartes zijn aansluitend begin juni met een ponton richting de projectlocatie vervoerd. Daar is het op de juiste plek gezet door Sterk, dat ook het hijswerk en afmonteren voor zijn rekening nam. Het vormde het slotakkoord van een project waarin Sterk zijn multidisciplinaire expertise in alle opzichten kon tonen.

Dike Reinforcement Texel

Description

Published: July 17th, 2017

In April this year we started work on what is an extremely welcome project: reinforcement of the Wadden Sea Dike on the island of Texel. Combinatie Tessel has been commissioned by the Hollands Noorderkwartier Regional Water Authority to reinforce approximately 14 kilometres of dike and to replace three large pumping stations.

Safety
The dike no longer meets statutory safety requirements. At various points the dike is too low, lacks sufficient stability and requires stronger revetments. The pumping stations have also been rejected in terms of their water safety; consequently, they need to be replaced.

Oudeschild
In most locations improvements to the dikes are to be made by replacing the dike revetments, creating gentler slopes or slightly increasing the elevation. However, sheet piling is to be installed at a number of sites where there is too little space. Perhaps the most far-reaching work has to be done at the port of Oudeschild, where Sterk has achieved major sheet-piling construction work.

In view of the location (likelihood of damage, disturbance and tourism), nuisance levels had to be low in terms of the work to be done. For that reason, there was vibration-free installation of all sheet piling. Our approach included using our Woltman piling equipment to guide installation of the sheet piling with a leader. To that end a pile press pushes the sheet piling into the ground in batches of four (referred to as ‘quads’). You can get a good idea of this in the first video on the right (starting at 1:20):

Silent Piler
We have also managed to install sheet piling vibration-free by using our Silent Piler. This compact machine, which basically travels across the sheet piling, was implemented in places inaccessible to our other equipment. The first sheet piling to be put in place was achieved using a ‘start-up frame’. This was furnished with the necessary ballast to compensate for the compressive force on the sheet-pile planking. You can see how this works in the second video on the right..

De Schans Pumping Station
We have also been installing sheet piling at various pumping stations, including the De Schans Pumping Station. In part, this pumping station needed to be replaced because we found that the dike construction lacked sufficient strength. Moreover, this pumping station had reached the end of its operational life.

To produce the pumping station, Sterk installed the sheet piling in front of the construction pit to serve as a temporary earth and water-retaining structure. This prevented the sea from entering the site during construction. A splendid video was also made of these activities, which you can see in the third video alongside.

A significant part of the work has been completed or else is in progress. The entire project is scheduled for completion at the end of 2019.

Project details

Client: Combinatie Tessel
Location: Texel
Contract value: € 1.000.000 +
Start date: 15-04-2017
End date: 16-10-2017

Techniques used

(Pre-)drilling, Anchoring constructions, Construction work, Fluidisation, High-frequency vibration/extraction, Static driving, Strutting

Omschrijving

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