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Porto de Douala

Porto de 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.

Porto Tanger Med 2

Porto Tanger Med 2

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

Porto Autônomo de Pointe-Noire

Porto Autônomo 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 Barras de gravata marítima 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.

Terminal de Contêineres MultiRio

Terminal de Contêineres MultiRio

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.

Terminal Internacional de Carga Paradip (PICT)

Terminal Internacional de Carga Paradip (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.

Fontes das imagens: Canal do GRUPO JM BAXI no YouTube: https://www.youtube.com/watch?v=k9-VV3nlT58

Desenvolvimento Marinho do Porto Mugharraq

Desenvolvimento Marinho do Porto 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 marine tie bars (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.

Fonte das imagens: https://wadeadams.com/projects/mugharraq-port-construction/

Porto de Altamira – Expansão do Terminal Múltiplo Uso

Porto de Altamira – Expansão do Terminal Múltiplo Uso

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 marine tie bars to anchor the sea walls during the project.

Additionally, 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.

Fonte das imagens: Manual do Porto de Altamira 2008-2009, produzido por Land & Marine Publications Ltd em nome da Administración Portuaria Integral de Altamira, SA de CV (API Altamira)

Porto Sète

Porto 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 Barra de gravata marítima 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 is a 77-storey skyscraper in Bangkok. Standing at 314 meters, it became Thailand’s tallest building upon its completion in 2016. Mahanakhon is located in Silom, Bangkok’s busiest business district, directly above the Chong Nonsi BTS Skytrain station. The project was developed by PACE and built by Bouygues-Thai.

Fundações

Building foundations in Bangkok is always a challenge. With the city situated on sandy and humid soils, foundations must be deep, and most projects feature thick paredes de diafragma (D-Walls) to prevent water infiltration.

For the D-Walls of Mahanakhon, Dextra supplied Bartec rebar couplers that were mounted on hook bars, installed horizontally, and cast in concrete. This application allows for the reconnection of bars to the D-Wall at a later stage when starting slab reinforcement.

Additionally, headed bars were installed in the thick foundation mat. Barras com cabeça are a superior alternative to barras com ganchos in congested areas, offering high-performance anchorage while being easier to install.

Superestrutura

The tower is built around a core wall, constructed using slip-formwork, and is surrounded by 12 mega columns. To connect the columns to the core wall, Dextra supplied Bouygues-Thai with its renowned Bartec solução. Bartec couplers, installed flush with the formwork and cast in concrete, allow for second-phase bar reconnection, bridging the columns and core wall.

In the mega columns, rebar couplers were also used to perform bar-to-bar vertical connections.

Skybar

For the rooftop skybar, Dextra supplied Tension Rod Systems. These systems, equipped with fork ends, provide aesthetic and efficient anchorage, making installation simple and effective.

Grand Paris Express – Line 14

Grand Paris Express – Line 14

The Grand Paris Express is a major urban transport project taking place throughout the French capital. The project will add four new lines (lines 15, 16, 17, and 18) and extend two existing lines (11 and 14).

Dextra has been involved in several station packages through its local distributor partners. On line 14 in particular, Dextra supplied Fortec rebar couplers in the stations of Orsay and Pont Cardinet.

For Bagneux Station in the north of Paris, located at the intersection of metro line 4 and the future line 15, Dextra supplied its ASTEC Active Anchors.

ASTEC Active Anchors are the preferred solution for subway station works as tunnel boring machines and earth-moving equipment can simply cut the FRP tendons of the anchors at any stage, eliminating the need for unreliable and costly anchor removal. The solution was approved for this project by the consulting firm SYSTRA.

Following numerous successful projects in the Middle East, this was the first time ASTEC Active Anchors (a recent Dextra innovation) were installed in Europe.