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Suvarnabhumi Bangkok International Airport, สนามบินสุวรรณภูมิ

Suvarnabhumi Bangkok International Airport, สนามบินสุวรรณภูมิ

Suvarnabhumi Airport is the main international airport of Thailand, operating both domestic and international flights and acting one of the main gateway to South East Asia for travelers in the region. The airport is located at the East of Bangkok, less than 15mn from Dextra main manufacturing facility.

Dextra has been involved has been involved since the beginning of Suvarnabhumi construction back in 2001, and is still involved today in the airport’s latest expansion projects.

For Suvarnabhumi Airport, Dextra delivered over the years a vast range of technical solutions to support the various contractors on part of the project.

For foundation piles, diaphragm walls, columns and beams and other concrete structures, Bartec rebar couplers have been used extensively in all parts of the airports. The popular coupler solution allow to safely connect rebar together, as vertical or horizontal connections. In Thailand, Dextra also takes in charge the rebar preparation service, which is ensured from our own threading yard in Bangkok.

Terminal roofs and concourses have also been designed to use as cross-trusses Dextra Tension Bar Systems. The high performance large par systems are easy to install and adjust in length thanks to their fork ends and in-line connectors, and participate to the overall aesthetics of the terminal structure.

For plane remote parking area where plane fine tune communications with the control tower, Dextra supplied large diameter FRP dowel bars, connecting the tarmac concrete slabs.Dextra FRP bars provide similar tensile performance to steel bars but prevent some of the interferences inherent to metallic structures.

Riyadh Metro

Riyadh Metro

Riyadh Metro is a massive urban transit system project under construction in Riyadh, Saudi Arabia. The project will feature 85 stations, built along 6 transit lines, for a total rail length of 176km. It is expected that the system will serve at least 1 million passengers daily at its inauguration in 2018.

For this large infrastructure project, Dextra has been involved on various stations and packages.

Excavation works

Before proceeding with general construction works, during early excavation phase, it is required to anchor retaining walls back into the stable ground in order to prevent any wall displacement. This will allow to keep excavating in a safe environment.

For that purpose, Dextra supplied steel ground anchors installed at the station perimeter. Each system is based on a high-tensile fully threaded bar, coming with nut and plate, and grouted to provide bonding with the soil.

For more information, please refer to Steel Ground Anchors page.

Raft & Vertical connections

Bartec rebar couplers were supplied for the works in the stations. Couplers were used for slabs, column and wall connections. A typicall application on this project is to cast rebar couplers in the concrete with reinforcement, and then proceed with second phase bar connection at a later stage.

Unitec bolted couplers can have also been use on various parts of the project. Typically Unitec is used when overlap is planned but lapping length appear to be too short to perform a safe splice. In that case Unitec provides a convenient and full performance connection.

Karimun Yard

Karimun Yard

The Karimun Yard located on the small island of Karimun (pop. 200,000), less than 25km away from the island of Batam (Indonesia) and Singapore. The Karimun Yard, operated by Saipem offers more than 780,000 sqm* of fabrication areas with an annual production of 50,000 tons.

Between 2009 and 2010 Dextra has manufactured and supplied for Saipem large >Marine Tie Bars, which were incorporated into the main quay wall. In 2008, Dextra also supplied the Marine Tie Bars and >Waling Beams connecting the sheet pile walls of the service jetty

For the main yard, Dextra supplied its Marine Tie Bars Grade 700, which is the highest in the range. Higher tie bars grades allow to high performance while limiting the size and weight of the bars, making them easier to transport and install. Grade 700 can also be used to optimize design, for example by spreading the bars further away from each other, hence reducing the total number of bars on the project.

To connect the bars to the walls, ball cages were used. Used together with a bearing plate embedded in wall, ball cages allow a multidirectional adjustment angle of 10°. To splice bar segments, couplers were also used.

For more information about our marine solutions in Asia Pacific, please consult our Bangkok

*CF Saipem Yard Sheet 07.2014

São Paulo Arena Corinthians

São Paulo Arena Corinthians

The São Paulo Arena Corinthians is a football and multipurpose stadium which was built between 2011 and 2013 in preparation of the 2014 FIFA Worldcup in Brazil.

The stadium has a capacity of 49,000 people, making it the fifth largest stadium in Brazil in term of capacity.

For the construction of the stadium, 80% of the structural elements were made thanks to precast techniques, of which 40% were produced directly on the precast plant set up on site.

For this project, Dextra Do Brasil delivered to contractor Odebrecht, main contractor on this project, its Rolltec rebar coupler solution.

On the São Paulo Arena Corinthians project, Rolltec rebar couplers were used inside the precast elements to provide connections between slabs, beams and columns.

To allow the use of a coupler in the precast element, a rebar ended with a A-type thread is cast into the precast element, with ist thread being protected by a pocket former.

rolltecpocketformer

Once set up at its final location, the pocket former is removed and the space around the thread allows to conveniently screw a Rolltec coupler from the opposing rebar (B-type thread). More than 45,000 Rolltec couplers were used for the rebar connections on the Arena Corinthians. The coupler solution was supported by a Rolltec rebar preparation equipment, installed on site, and Dextra team of engineered in charge of training operators and rolling out preventive maintenance to ensure the equipment was used as its maximum capacity.

Reventazón Hydroelectric Dam

Reventazón Hydroelectric Dam

Reventazón Dam is a concrete-face rock-fill dam set up on the Reventazón River, in the Limon province of Costa Rica. The dam, inaugurated end of 2016, is the largest power station in the country with a total power capacity of 305MW. The project has become a model in term of environmental integration, featuring passages for animals.

For this major dam project, Dextra Latin America continuously delivered and supported contractor ICE from 2010 to 2016. Dextra supplied its Rolltec rebar splicing solution, couplers and machine. Rolltec is the most popular rebar slicing solution in Latin America, providing a competitive alternative to lap splices.

The rebar preparation is supported by a unique light equipment, operated by a single operator. The Rolltec machine is relatively easy to transport and convenient to install even on most remote locations such as dam construction sites.

Rolltec splices were used inside the water tunnels, installed on bent rebar. For that kind of application, the straight bar has to be threaded, then bended. During the bending operation, a coupler may be temporarily fit onto the bar end in order to protect the thread.Rolltec splices were used inside the water tunnels, installed on bent rebar. For that kind of application, the straight bar has to be threaded, then bended. During the bending operation, a coupler may be temporarily fit onto the bar end in order to protect the thread.

Dextra Rolltec couplers were also installed into the tall structure (130m high) as a way to splice rebar vertically.

Kuwait International Airport Expansion: Terminal II Building

Kuwait International Airport Expansion: Terminal II Building

Kuwait International Airport is the country’s main airport located in the South of Kuwait City. The Hub can currently handle more than 9 million passengers per year, and is home to the famous Kuwait Airlines, Jazeera Airways, and Wataniya Airways.

A new state-of-the-art terminal

This newest infrastructure is part of the Airport’s expansion project, aiming to enhance its status as the State of Kuwait’s gateway. When complete, the Terminal II building will form a triangular mark, a symbol of Kuwait reflecting the country’s rich culture and civilization.
Scheduled for completion in 2020, this striking five-storey terminal building will be able to handle 25 million passengers a year, and will be connected to the first terminal via a tunnel.

From the foundations to the roofs

For this project, the lead Turkish contractor Limak Holding and its Kuwaiti agent Kharafi National have chosen Dextra’s Rolltec rebar coupler solution for rebar splicing in all the building’s concrete structures. Thanks to its rolled-parallel threaded system, as well as its simple preparation and installation process, this splicing solution can help shorten construction cycle times.

For the Terminal’s impressive structure, the contractors have also opted for Dextra’s high-performance smooth Post-Tensioning bar systems. Thanks to its smooth carbon steel bars and its rolled threads, the very high-tensile PT Bar system features high fatigue and strength performance, as well as a high impact resistance.

For more information about our products, both in rebar splicing and engineered bar systems, please contact Dextra team in Dubai.

Pune Metro UG 04 – Swargate Metro Station

Pune Metro UG 04 – Swargate Metro Station

Pune Metro is an under-construction mass rapid transit system that comprises of 3 lines with a total length of 55 km. The Metro is in Pune Metropolitan Region in Pune City, India.

Swargate Station is part of the 17-km Line 1 running from PCMC Building to Swargate. Lines 1 and 2 are expected to be operational in 2021 while the elevated Line 3 will be completed one year later.

For this project, Dextra supplied more than 1,700 steel active anchors for stabilization of vertical retaining walls around the excavation area.

Dextra’s Geotec Steel Active Anchor is the preferred solution for excavation works where post-tensioning is required.

Active Anchor

The anchors are corrosion protected and based on high-tensile fully-threaded bars that help prevent deformation of the retained structure.

After the construction of Pune Metro UG04 is completed, the underground station at Swargate will be a strategic part of a multimodal transit hub connecting to the city bus services and parking facilities for private vehicles.

Hyosung LPG Cavern

Hyosung LPG Cavern

This multi-phase project handled by Hyosung Group will include a propane dehydrogenation (PDH) production plant, a polypropylene (PP) plant, a liquefied petroleum gas (LPG) storage tank, and warehouses for LPG and petrochemical products.

The whole complex will cover 60 hectares of the Cai Mep Industrial Zone in Ba Ria-Vung Tau, located near Ho Chi Minh City.

Dextra is supporting the construction of the 240,000-ton LPG underground storage facility by supplying 30,000 units of glass fiber reinforced polymer (GFRP) rock bolts to consolidate the cavern rock face around the 150m deep excavation area.

Injecting sea water inside the rocks around the cavern will create a water curtain that will effectively prevent any oil leakage: in this high corrosive environment, GFRP is the ideal solution.

Dextra GFRP Rock Bolts are cuttable mining anchors based on fully threaded GFRP tendons. The bolts are available in 7 diameters from 20mm to 40mm, delivered with GFRP plate and nuts. Due to GFRP’s lightweight nature, it is easy to handle, transport and installation inside the tunnel.

The facilities are expected to begin commercial operation in 2020.

New International Airport for Mexico City

New International Airport for Mexico City

Mexico City New International Airport is a new infrastructure project designed by Sir Normal Forter and launched in 2014. It is aiming to provide Mexico’s capital with a new state-of-the-art airport hub by 2020. The project is located to the East of Mexico City. The project will install an annual passenger capacity of 68 million passengers, more than the previous Benito Juarez Airport (41.7 million passengers annually, already the busiest airport of Latin America). The project features a X-shaped passenger terminal, 3 runways and a control tower.

For this, the largest infrastructure project in Latin America, Dextra has been involved with the supply of its Bartec Rebar Couplers for the foundations of the terminal building (contractor ICA), the transport building (contractor Sacyr) and the control tower (contractor Aldesa).

Bartec coupler, often prefered in seismic areas such as Mexico, substitute on this project all reinforcement lapping of large ASTM #12 rebar (equivalent 38mm). On such large diameters, it is both faster and cheaper to connect bars with couplers rather than traditionnal overlapping.

Bartec rebar coupler equipment a the New Interational Airport of Mexico construction site
Dextra has provided Mexico Airport with up to 10 sets of Bartec equipment (a total of 30 machines, with each set delivered in a container) for all rebar preparation operations. The impressive setup has been supported by our local After Sales team, training the machine operators and maintaining equipment to achieve optimal productivity.

Singapore MRT Thomson-East Coast Line Extension

Singapore MRT Thomson-East Coast Line Extension

The Thomson-East Coast Line is a future Singapore MRT system line that will connect the Thomson Line and the Eastern Region Line. The 43-km link will add 31 new stations to the existing rail network, with 7 interchange stations.

For that project, Dextra supplied numerous packages, including for example the Marine Terrace Station, where 4 large diameter soft eyes have been installed in the diaphragm wall cages in August 2017.

Soft-Eyes are made of GFRP rebar, which is used to substitute the steel reinforcement in the D-Walls of construction shafts. When the Tunnel Boring Machine (TBM) breaks through the D-Walls, it easily cuts the GFRP bars, saving time on project schedule and money on equipment usage.

Dextra has been the pioneer of this application since its first use in the Bangkok metro project in 1998 and has extensive experience for in-house design and manufacturing of Soft-Eyes.

The D-Walls installed on Terrace Station also feature Bartec® rebar couplers, a common application for most station packages in order to reconnect slabs horizontally in underground stations. Bartec couplers are also used more generally for vertical connections in foundation piles and slabs.

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