Dextra-Gruppe | Zuverlässige Verbindungen

Hafen von Douala

Hafen von Douala

The Port of Douala is a large seaport located on the Atlantic Ocean, in the Wouri department of Cameroon. It serves as the main port of Cameroon and is the busiest port in Central Africa. Through agreements, it also serves countries like Chad and the Central African Republic, which lack direct access to the sea.

To support the ambitious development plan of Port Autonome de Douala, Dextra collaborated with contractor BESIX for the engineering and supply of the steel structures supporting Douala Pier 51, a 165-meter-long quay wall.

In 2015, Dextra engineered and supplied Marine Tie Bar systems with a diameter of M100 and in Grade 700, the highest in our range. Higher grades offer an improved performance-to-steel ratio compared to grades 355/510 and 500/660, allowing for smaller diameter bars, which ultimately provide steel savings and facilitate logistics and installation.

The long tendons were spliced with turnbuckles and couplers. The rods were anchored into the combi walls using Captive Nuts accessories, which allow a multidirectional rotation angle of 5°, easing the installation process.

Tanger Med 2 Hafen

Tanger Med 2 Hafen

Tanger Med 2 is the expansion of Tanger Med, a multipurpose deep-water seaport located a few kilometers east of Tangier, Morocco, facing Gibraltar.

The port expansion aims to increase the yearly capacity of the largest port in Africa by 5.2 million containers.

For this large infrastructure project, Dextra supported contractor Bouygues with a rebar splicing solution for the reinforcement of the caissons.

Dextra supplied its Rolltec solution, which is AFCAB-certified, a requirement for this project. Two Rolltec machines were installed to support the threading activities, completing 360,000 threads in total (180,000 Rolltec couplers).

The couplers were used in the reinforcement of the caissons, which were as tall as 20 to 24 meters. The couplers provided:

  • Temporary openings to solve congestion issues in the reinforcement within the caisson, creating safe passages for men and equipment during the installation phase.
  • Horizontal wall-to-slab connections (from the inside of the caisson perimeter to the slab). For this application, couplers were left pending, allowing the slip form to go up.

MA Tanger Med 2 Case Study Rolltec MA Tanger Med 2 Case Study Rolltec1

Port Autonome de Pointe-Noire

Port Autonome de Pointe-Noire

Port Autonome de Pointe-Noire (PAPN) is a major seaport located on the Atlantic Ocean, part of the Republic of Congo. It is connected to the capital, Brazzaville, by a 500 km rail link and plays a vital role in regional development, facilitating trade with neighboring countries such as the Democratic Republic of Congo, Angola, and Gabon. With over 600,000 containers passing through annually, the port’s traffic continues to grow.

To support PAPN’s ambitious development plans, Dextra collaborated with contractor SAIPEM for the engineering and supply of steel structures for several of Pointe-Noire’s 16-meter-deep quays.

Between 2011 and 2012, Dextra supplied approximately 1,000 tons of Marine-Verbindungsstangen in Grade 700, the highest in our range. These higher grades offer better performance-to-steel ratios, allowing smaller diameter bars, which result in savings in logistics and installation.

Dextra also provided Waling Beams installed onto the Combi Walls. These beams act as an interface between the steel walls and the large-diameter tie rods. Since the Waling Beams support the rods, their shape, spacing, and installation must be tailored to the tie rod configuration. To ensure compatibility and streamline the installation process, Dextra always recommends designing and delivering Waling Beams alongside the tie rod assemblies.

From 2015 to 2016, Dextra participated in a second phase of the project for the construction of Quay D.

MultiRio-Containerterminal

MultiRio-Containerterminal

The MultiRio Container Terminal, located in the Rio de Janeiro Port, specializes in the import/export of finished goods. To increase its shipping capacity by at least 50%, MultiRio launched an expansion project in 2012 to add extra quay length and accommodate more containers.

To support this pier expansion, Dextra partnered with contractor Andrade Gutierrez for the engineering and supply of Marine Tie Bars.

In 2014, Dextra supplied 100 tons of steel rods in medium diameters M56 and M59. The rods were anchored to the wall using swivel plates and nuts, allowing for 5° multidirectional adjustment.

These plates were positioned onto the waler beams, which were also supplied by Dextra. Waler beams are installed onto the sheet piles, and their design is directly influenced by the chosen Marine Tie Bars solution. For example, the spacing of the beams is impacted by the diameter of the bars and the angle of the rods.

tie rods waling

Between the wall, Hinge couplers were installed in line to allow for additional vertical tolerance. This was necessary to counteract ground settlement, which can occur over time due to the heavy cranes operating and the piles of stored containers. The Hinge couplers provided the flexibility needed to accommodate any vertical movement and ensure the stability of the structure.

Paradip International Cargo Terminal (PICT)

Paradip International Cargo Terminal (PICT)

Paradip International Cargo Terminal (PICT) is a multipurpose berth located at Paradip Port on India’s eastern coast, designed to handle clean cargo. The berth has a depth of 17.1 meters and a length of 450 meters, allowing it to accommodate cape-sized vessels up to 125,000 DWT. It will handle a range of cargoes including containerized goods, iron and steel products, fertilizer, food grains, and sugar.

Dextra supplied approximately 370 tons of Marine Tie Bar systems, sizes M105 and M76, Grade 500, along with accessories like couplers, turnbuckles, swivel plates, and swivel nuts. These tie bar systems were used to secure the concrete diaphragm walls at both ends of the berth, ensuring the structural integrity of the terminal.

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Dextra Marine Tie Bars Application

With the new berth becoming operational in 2018, Paradip Port now boasts a total of 18 berths, including 13 cargo berths, 2 oil tanker berths, and 3 crude oil tanker berths with a single-point mooring system for handling crude oil tankers. This expansion significantly enhances the port’s capacity to handle a wide range of cargo and oil shipments.

Bildquellen: JM BAXI GROUP YouTube-Kanal: https://www.youtube.com/watch?v=k9-VV3nlT58

Marineentwicklung des Hafens Mugharraq

Marineentwicklung des Hafens Mugharraq

Mugharraq Port, located 240 kilometers from Abu Dhabi, UAE, is undergoing a significant marine development project. The expansion includes extending the quay wall to 480 meters, deepening the facility to 8 meters, and adding six Ro-Ro ramps and additional berths to facilitate heavy lift operations.

Dextra supplied 407 tons of Verbindungsstangen für die Schifffahrt (size M103, grade 700) to connect the sea walls to the anchor walls.

This project aims to enhance the port’s infrastructure and service capabilities, better supporting offshore and mega projects in the oil and gas industry.

Bildquelle: https://wadeadams.com/projects/mugharraq-port-construction/

Altamira Port – Erweiterung des Mehrzweckterminals

Altamira Port – Erweiterung des Mehrzweckterminals

Altamira Port, located on the Gulf of Mexico in Tamaulipas, Mexico, is a key hub connecting with 125 ports worldwide. It handles a wide range of cargo, including liquid and dry bulk, petrochemicals, LNG, containers, and general cargo, serving an important industrial and economic region.

As part of its expansion to strengthen Mexico’s position as a global logistics platform, Dextra supplied 174 tons of grade 700 Verbindungsstangen für die Schifffahrt to anchor the sea walls during the project.

Zusätzlich, Sonitec, a sonic tube solution, was used for CSL (crosshole sonic logging) testing of foundation piles in the quay. This technique ensures the structural integrity and homogeneity of concrete in the piles by measuring the speed of ultrasonic pulses.

Bildquelle: Altamira Port Handbook 2008-2009, erstellt von Land & Marine Publications Ltd im Auftrag der Administración Portuaria Integral de Altamira, SA de CV (API Altamira)

Hafen von Sète

Hafen von Sète

The Port of Sète, located on the Mediterranean Sea, is the largest fishing port in southern France and also serves numerous ferry routes to North Africa, including Tangiers. As part of its efforts to increase container capacity, the port is adding a new quay (Quay H), 15 meters deep, to improve both handling and storage of containers.

To support contractor Soletanche-Bachy in the construction of this new quay, Dextra engineered and supplied 74 large Marine-Krawattenstange assemblies, the largest in our range at M160. These large-diameter assemblies reduce the number of sets required by increasing spacing between each rod.

The tie rods were anchored into the D-Wall using ball cages, which allow a 10° rotational angle in all directions. After excavation, the ball cages were opened to enable reconnection of the threaded ends of the rods.

King Power Mahanakhon, Thailand

King Power Mahanakhon, Thailand

King Power Mahanakhon ist ein 77-stöckiger Wolkenkratzer in Bangkok. Mit 314 Metern war er nach seiner Fertigstellung 2016 Thailands höchstes Gebäude. Mahanakhon befindet sich in Silom, Bangkoks geschäftigstem Geschäftsviertel, direkt über der BTS-Skytrain-Station Chong Nonsi. Das Projekt wurde von PACE entwickelt und von Bouygues-Thai gebaut.

Stiftungen

Der Bau von Fundamenten in Bangkok ist immer eine Herausforderung. Da die Stadt auf sandigen und feuchten Böden liegt, müssen die Fundamente tief sein, und die meisten Projekte verfügen über dicke Schlitzwände (D-Walls), um das Eindringen von Wasser zu verhindern.

Für die D-Walls von Mahanakhon lieferte Dextra Bartec Bewehrungskupplungen, die auf Hakenstangen montiert, horizontal installiert und in Beton gegossen wurden. Diese Anwendung ermöglicht die spätere Wiederverbindung der Stangen mit der D-Wand, wenn mit dem Plattenbau begonnen wird. Bewehrung.

Zusätzlich, Kopfstangen wurden in die dicke Fundamentmatte eingebaut. Kopfstäbe sind eine überlegene Alternative zu Endhaken in überfüllten Bereichen, bietet eine leistungsstarke Verankerung und ist gleichzeitig einfacher zu installieren.

Überbau

Der Turm ist um eine Kernwand, errichtet in Gleitschalung, ist von 12 Megasäulen umgeben. Um die Säulen mit dem KernwandDextra belieferte Bouygues-Thai mit seinem renommierten Bartec Lösung. Bartec Die bündig mit der Schalung eingebauten und in Beton eingegossenen Muffen ermöglichen die Wiederverbindung der Stäbe in der zweiten Phase und überbrücken die Stützen und Kernwand.

In den Megastützen wurden außerdem Bewehrungskupplungen verwendet, um vertikale Stab-zu-Stab-Verbindungen herzustellen.

Skybar

Für die Skybar auf dem Dach lieferte Dextra ZugstabsystemeDiese mit Gabelenden ausgestatteten Systeme bieten eine ästhetische und effiziente Verankerung und machen die Installation einfach und effektiv.

Grand Paris Express – Linie 14

Grand Paris Express – Linie 14

Der Grand Paris Express ist ein großes städtisches Verkehrsprojekt in der gesamten französischen Hauptstadt. Im Rahmen des Projekts werden vier neue Linien (Linien 15, 16, 17 und 18) eingerichtet und zwei bestehende Linien (11 und 14) verlängert.

Dextra war über seine lokalen Vertriebspartner an mehreren Stationspaketen beteiligt. Insbesondere für die Linie 14 lieferte Dextra Fortec-Bewehrungsverbindungen in den Stationen Orsay und Pont Cardinet.

Für den Bahnhof Bagneux im Norden von Paris, der an der Kreuzung der Metrolinie 4 und der zukünftigen Linie 15 liegt, lieferte Dextra seine ASTEC Aktivanker.

ASTEC Aktivanker sind die bevorzugte Lösung für U-Bahn-Stationsarbeiten, da Tunnelbohrmaschinen und Erdbewegungsmaschinen die FRP-Sehnen der Anker jederzeit einfach durchtrennen können, wodurch ein unzuverlässiger und kostspieliger Ankerausbau entfällt. Die Lösung wurde für dieses Projekt vom Beratungsunternehmen SYSTRA freigegeben.

Nach zahlreichen erfolgreichen Projekten im Nahen Osten war dies das erste Mal ASTEC Aktivanker (eine neue Innovation von Dextra) wurden in Europa installiert.