The Thane-Kalwa Creek Bridge is a nearly 2.4 km long U-shaped road bridge over the Thane Creek at Kalwa Naka, India, designed to ease traffic congestion between Thane and Navi Mumbai, as well as within the Kalwa and Thane city areas.

Dextra delivered more than 20 sets of Tension Rod systems in various lengths (with a maximum length of approximately 24 m), size M108, grade 700, used as suspenders for the basket-handle steel arch bridge.

Tension Rods typically act as bracing or suspension elements, offering high strength, length adjustability, ease of installation, and the ability to be post-tensioned after installation. A wide range of sizes and accessories is available in various steel grades, including both carbon and stainless steel.

The bridge was originally scheduled to open in 2020, but the pandemic and subsequent lockdowns significantly delayed construction.

The Brăila-Tulcea Bridge is a road suspension bridge over the Danube River, connecting Brăila, a major city in eastern Romania, to the opposite bank in Tulcea County.

It will be the first bridge over the maritime sector of the Danube River, significantly improving road accessibility in the Galați-Brăila area, enhancing connections to Constanța and Tulcea, and linking the Moldavia and Dobruja regions.

The suspension bridge will feature:

• A main span of 1,974 meters.
• Two side spans: 490 meters on the Brăila bank and 365 meters on the Tulcea bank.
• Two access viaducts, each 110 meters long.
• A connecting road stretching approximately 23 kilometers.

For this project, Dextra supplied 280,000 Bartec rebar couplers to reinforce the bridge structure.

Bartec couplers are ISO 15835 S2-compliant, meeting seismic design standards. They can withstand tension and compression under large deformations, ensuring structural resilience during violent earthquakes.

The bridge construction is completed in 2023.

A New Fast-Track Connecting Central to Eastern Thailand

The construction of the Bang Pa-In – Nakhon Ratchasima Motorway is considered one of Thailand’s major infrastructure projects, serving as a new fast-track link between the central and eastern regions of the country.

The main purpose of this project is to stimulate economic growth. Once completed, it will connect Thailand’s major urban centers within the Greater Mekong Subregion.

The Intercity Motorway consists of two sections:

• A six-lane, 103-kilometer section from Bang Pa-In to Pak Chong.
• A four-lane, 93-kilometer section from Pak Chong to Nakhon Ratchasima.

Given the challenging four-year construction timeline, the project was divided into approximately 40 contracts to accelerate progress. Additionally, to minimize potential disruptions to local residents, numerous underpasses, overpasses, and elevated structures (such as large viaducts) were incorporated into the design.

Optimizing Infrastructure with Dextra’s Rebar Couplers

For the motorway’s elevated structures, contractors from various project packages opted for Dextra’s full-performance Bartec rebar couplers (standard/position) to save both time and costs in the mechanical connection of 20mm to 32mm diameter reinforcement bars.

Thanks to Bartec’s unique splicing system, all applications can be fulfilled using a single model of rebar coupler, significantly reducing inventory management complexity.

Additionally, Dextra’s Sonitec sonic tubes were installed for crosshole sonic logging (CSL) tests in the foundations of the Bang Pa-In – Nakhon Ratchasima Intercity Motorway structures.

Dextra’s Post-Tensioning Bars for Elevated Structures

Beyond splicing and CSL testing solutions, smooth and fully-threaded post-tensioning (PT) bars were also used for both temporary (lifting and launching girder assembly) and permanent applications in bridge segments.

As of June 2018, approximately 28,000 sets of PT bars had been delivered.

For more information about Dextra’s solutions in Thailand, please contact our Bangkok office.

The six-lane extradosed bridge over the Ganga River in Prayagraj will span 9.9 kilometers, with the main bridge covering 3.84 kilometers and the approach segment covering the remaining distance.

The 3.84-kilometer stretch will include 67 pillars and 17 pillar foundations. Of this 3.84 km, an 860-meter span will be an extradosed bridge, while the rest will be a precast segmental bridge with 50-meter spans.

Dextra supplied 20,000 Sonitec tubes, an easy-to-assemble and time-saving solution used for CSL (crosshole sonic logging) testing of foundation piles to determine structural integrity. The tubes were installed in piles that were 30 to 36 meters deep with a diameter of 1.2 meters.

The bridge will start from Pratapgarh Road, gain height to cross over the existing Y-junction (leading towards Lucknow), and then cross the Ganga River from Kacchar, spanning over Beli village before ending at Stanley Road. It is expected to be operational in 2024.

The New Storstrøm Bridge is a testament to Denmark’s commitment to improving transportation infrastructure and connecting the country’s islands more efficiently. Stretching over the Storstrømmen strait, this bridge will replace the aging Storstrøm Bridge, which has served as a vital connection between the islands of Zealand and Falster since 1937.

The New Storstrøm Bridge is designed to accommodate not only vehicular traffic but also pedestrians and cyclists. Its innovative architecture and engineering are set to reduce travel time, improve safety, and provide a reliable link between these two major Danish islands.

Dextra, with its expertise in engineering construction solutions, has supplied 120,000 Rolltec couplers and headed bars for connecting pile reinforcement cages. These components are essential for the construction of the bridge’s foundation, ensuring that the piles are securely interconnected to support the immense weight and forces the bridge will experience during its lifetime.

In addition to our contribution to the bridge’s foundation, we have also supplied Unitec couplers for repair applications, connecting installed rebars with no threads. With Dextra’s contributions, this bridge will serve as a lifeline between Zealand and Falster for generations to come, connecting people, communities, and opportunities.

The Nanay Bridge is a 2.2 km bridge crossing the Nanay River, north of the city of Iquitos, Peru. The bridge will connect the district of Bellavista on the right bank of the Nanay River with the district of Santo Tomas on the left bank.

With a population of almost half a million people, Iquitos is the largest city in the world that cannot be reached by road. Tucked away in the Peruvian Amazon jungle, it is currently accessible only by river and air. Thanks to this project, the city will finally be connected to the rest of the Loreto Region.

The main structure is a cable-stayed bridge with a main span of 242 m and a total length of 424 m. The approach structures are 1.2 km long on the right bank of the river and 320 m long on the left bank.

The bridge carries two lanes of traffic and two pedestrian walkways. The roadway has a total width of 12 m, and each pedestrian walkway is 1.2 m wide.

It uses lightweight composite steel and concrete to minimize the use of concrete and reduce loads transferred to the foundations.

For this project, Dextra has supplied 100,000 Bartec couplers for rebar connection and 30,000 headed bars for shear reinforcement of the anchors.

Once completed, it will be the longest bridge in the country.