Central Kowloon Route (CKR) – Central Tunnel, Hong Kong

Publicado en septiembre 11, 2024septiembre 11, 2024 por Kansuda Visesthanakorn

Central Kowloon Route (CKR) – Central Tunnel, Hong Kong

Dextra played a pivotal role in the construction of the Central Kowloon Route (CKR) – Central Tunnel project in Hong Kong by supplying over 60,000 Fortec+ couplers. These mechanical rebar couplers were integral in ensuring strong and reliable connections within the road tunnel structure, meeting the stringent requirements for safety and durability.

The CKR, a major infrastructure project aimed at improving traffic flow across Kowloon, required advanced construction techniques, and Dextra’s Fortec+ couplers contributed significantly to the project’s structural integrity and long-term performance. The couplers were used to connect rebars in various locations, such as precast panels, tunnel access points, and driveways.

Fortec+ is a system that includes an additional rebar preparation process, in which the threaded bar end is proof tested by applying a tensile load. This is a non-destructive test, as the load level remains within the elastic zone of the reinforcing bar.

Image credit: Central Kowloon Route – Highways Department

New Pattullo Bridge, Canada

Publicado en septiembre 4, 2024septiembre 4, 2024 por Kansuda Visesthanakorn

New Pattullo Bridge, Canada

Dextra has proudly contributed to the construction of the new Pattullo Bridge in Canada, a vital infrastructure project that will enhance connectivity between Surrey and New Westminster. As part of this ambitious endeavor, Dextra supplied 100,000 bartec couplers, ensuring robust and reliable rebar connections from the bridge’s foundations to its towering pylons.

El bartec couplers, known for their high performance and ease of installation, were integral in providing the necessary strength and durability required for this long-term infrastructure. Dextra’s involvement in the Pattullo Bridge project underscores the company’s commitment to delivering innovative solutions that support large-scale construction efforts worldwide. As the new bridge takes shape, it stands as a testament to the importance of reliable engineering components in building the infrastructure of tomorrow.

San Shek Wan Sewage Treatment Works, Hong Kong

Publicado en agosto 2, 2024agosto 2, 2024 por Kansuda Visesthanakorn

San Shek Wan Sewage Treatment Works, Hong Kong

The San Shek Wan Sewage Treatment Works (STW) project in Hong Kong marks a significant step towards addressing the sewage disposal needs of the South Lantau region. As the population of South Lantau is projected to grow, with an ultimate population reaching approximately 12,600 by 2039, the sewage flow is anticipated to increase to 5,800 m³/day. To accommodate this, a comprehensive sewerage system is being constructed, which includes a trunk sewerage system for Pui O area, a secondary STW at San Shek Wan, and a village sewerage system for Lo Uk.

A critical component of this ambitious infrastructure project is the use of advanced materials and technologies to ensure its successful and sustainable completion. Dextra, a global leader in engineered construction products, has played a pivotal role by supplying Glass Fibre Reinforced Polymer (GFRP) soil nails for the excavation and lateral support (ELS) works.

The Role of GFRP Soil Nails in ELS Works

The excavation and lateral support works are essential to the project’s foundation and stability. The challenging geotechnical conditions in Hong Kong, characterized by complex soil and rock formations, necessitate the use of robust and reliable reinforcement solutions. GFRP soil nails, provided by Dextra, are ideal for such conditions due to their high tensile strength, corrosion resistance, and lightweight nature.

GFRP soil nails are used to stabilize slopes and excavations, preventing landslides and soil erosion. Their corrosion resistance is particularly beneficial in environments exposed to moisture and chemicals, such as sewage treatment works. This ensures a longer lifespan and reduced maintenance costs compared to traditional steel reinforcement.

Benefits of Dextra’s GFRP Solutions

Corrosion Resistance: Unlike steel, GFRP does not corrode when exposed to harsh environmental conditions. This makes it an excellent choice for the wet and chemically aggressive conditions present in sewage treatment works.
High Strength-to-Weight Ratio: GFRP offers a high tensile strength comparable to steel but at a fraction of the weight. This ease of handling and installation translates to time and labor savings.
Durability: The longevity of GFRP soil nails ensures the structural integrity of the excavation and lateral support systems over the extended operational life of the sewage treatment works.
Sostenibilidad: By using GFRP, the project reduces its reliance on steel, thereby contributing to more sustainable construction practices.

Impact on the San Shek Wan STW Project

Dextra’s involvement and the implementation of GFRP soil nails have significantly enhanced the efficiency and sustainability of the San Shek Wan STW project. The advanced materials have ensured that the excavation and lateral support works are not only robust and reliable but also cost-effective over the long term.

Upon completion, the sewage from South Lantau will be conveyed to the newly constructed STW for proper treatment. The treated effluent will then be safely discharged into the sea about 1.4 km off the South Lantau coast, ensuring minimal environmental impact. This project represents a crucial infrastructure upgrade that will support the region’s growth and development while maintaining high environmental and operational standards.

Cairo Monorail Bowstring Bridge, Egypt

Publicado en julio 5, 2024julio 5, 2024 por Kansuda Visesthanakorn

Cairo Monorail Bowstring Bridge, Egypt

The Cairo Monorail Bowstring Bridge project, a pivotal part of Egypt’s expanding urban infrastructure, has significantly benefited from the expertise and quality products supplied by Dextra. Known for their innovative engineering solutions, Dextra provided critical materials to support the construction of this state-of-the-art transportation link.

In particular, Dextra supplied tension rods in two distinct specifications for the project:

M78/OD75 in Grade CS520 – A total of 60 sets were delivered.
M83/OD80 in Grade CS520 – An additional 8 sets were provided.

These tension rods were specifically used as hangers for the bowstring bridge, ensuring a high level of strength and durability, which is crucial for the safety and longevity of the bridge, to maintain structural integrity and withstand the stresses of daily monorail operations.

Dextra’s tension rods, known for their high tensile strength and resistance to environmental factors while providing architectural pleasure, played a critical role in meeting these demands. This involvement underscores the importance of reliable and advanced engineering solutions in modern infrastructure projects, highlighting Dextra’s commitment to excellence and innovation in the field of civil engineering.

A66 Salzbachtal Bridge, Germany

Publicado en junio 12, 2024junio 12, 2024 por Kansuda Visesthanakorn

A66 Salzbachtal Bridge, Germany

The A66 Salzbachtal Bridge, located in Wiesbaden, Hesse, is a 304-meter-long, four-lane motorway bridge on the A66. Originally constructed in the mid-20th century, the bridge has been subject to wear and tear due to increasing traffic loads and aging infrastructure.

Foundation piles are fundamental to the stability and longevity of bridge structures. Ensuring their integrity is crucial to preventing potential structural failures. dextra played a pivotal role by supplying approximately 10,000 linear meters of Sonitec CSL (Cross Sonic Logging) tubes.

Sonic tubes are essential components in the CSL testing method, which is widely regarded as one of the most reliable techniques for assessing deep foundation integrity. Sonitec, designed for easy installation within the reinforcement cage, facilitates accurate cross-hole sonic logging, allowing engineers to precisely detect and locate defects within the piles.

(Image credit: PORR Deutschland, Wilhelm Schütz)

Cross Island Line (CRL) MRT, Singapore

Publicado en junio 12, 2024julio 19, 2024 por Kansuda Visesthanakorn

Cross Island Line (CRL) MRT, Singapore

dextra has played a pivotal role in the construction of Singapore’s Cross Island Line (CRL) MRT project, supplying Glass Fiber Reinforced Polymer (GFRP) soft-eyes, bartec couplers and Barras con cabeza for several crucial packages. dextra continues to support the ongoing packages of this extensive project.

The CRL is set to become Singapore’s eighth MRT line and its longest fully underground line, stretching over 50 kilometers. The project is being executed in three phases, with the first phase anticipated to be operational by 2030.

To minimize the environmental impact on the forested areas of the nature reserve, engineering solutions were meticulously chosen to further mitigate environmental disruption. These solutions include digging deeper into the ground and employing a large diameter boring machine, capable of accommodating two train tracks within a single tunnel. This approach not only reduces the surface footprint but also enhances the efficiency of the tunneling process.

Tunnel Boring Machines (TBMs) are a staple in Singapore’s subterranean infrastructure projects, adept at operating under a variety of ground conditions. The use of GFRP soft-eyes supplied by dextra is integral to these operations. Soft-eyes are essential components in TBM tunneling, acting as temporary openings that allow the TBM to break through concrete walls without compromising structural integrity. The GFRP material is preferred for its high strength-to-weight ratio, corrosion resistance, and ease of installation, ensuring safe and efficient tunneling operations.

dextra‘s expertise and reliable supply of GFRP soft-eyes, bartec couplers and headed bars have significantly contributed to the progress of the CRL project, aligning with Singapore’s commitment to sustainable and innovative infrastructure development. As the CRL project advances, dextra remains a key partner, supporting the construction of this monumental MRT line that will eventually enhance the daily commute for millions of Singaporeans.

Reconstruction of Tai Po Kau Tide Gauge Station, Hong Kong

Publicado en abril 2, 2024abril 23, 2024 por Kansuda Visesthanakorn

Reconstruction of Tai Po Kau Tide Gauge Station, Hong Kong

In the dynamic coastal landscape of Tai Po Kau, New Territories, Hong Kong, infrastructure projects demand robust and resilient solutions. One such endeavor, the Reconstruction of Tai Po Kau Tide Gauge Station project, required innovative materials to withstand the unique challenges posed by its environment. Dextra stepped in to provide approximately 1,000 meters of Glass Fibre Reinforced Polymer (GFRP) rebar for the ferry pier foundation, showcasing the efficacy of advanced composite materials in marine construction.

The Tai Po Kau Tide Gauge Station project aimed to revitalize the existing infrastructure, enhancing its resilience against tidal forces, corrosion, and environmental degradation. Recognizing the limitations of traditional steel reinforcement in marine environments, the project sought alternatives that could offer superior durability and longevity. Dextra’s GFRP rebar emerged as the ideal solution, offering exceptional resistance to corrosion, rust, and chemical degradation commonly associated with saltwater exposure.

GFRP rebar, composed of high-strength glass fibres embedded in a polymer matrix, delivers mechanical properties comparable to steel but with added benefits. Notably, GFRP rebar exhibits significantly lower thermal conductivity, reducing the risk of thermal bridging and enhancing structural integrity in extreme temperature variations. Furthermore, its non-magnetic properties eliminate electromagnetic interference, making it suitable for sensitive applications such as tide gauge stations.

The application of GFRP rebar within the Tai Po Kau Tide Gauge Station project encompassed both straight and bend bars, catering to the diverse structural requirements of the ferry pier. Dextra’s expertise in custom fabrication ensured precise bending and shaping of the rebar to fit the intricate geometries of the pier structure, facilitating seamless integration and minimizing construction complexities.

Laem Chabang

Publicado en noviembre 6, 2022marzo 15, 2024 por Sir Gwi

Laem Chabang

El puerto de Laem Chabang, en el Golfo de Tailandia, es el puerto más grande y con mayor actividad de Tailandia, después del puerto de Bangkok, y el cuarto puerto más activo del sudeste asiático. Está ubicado en la zona de pruebas de Chonburi, a un par de horas en coche de Bangkok y de las principales instalaciones de producción de Dextra.

Dextra ha colaborado con el contratista italo-tailandés para la ingeniería y el suministro de las estructuras de acero detrás del nuevo muelle de Laem Chabang.

Dextra diseñó y suministró sus sistemas Marine Tie Rods en Grado 700, el más alto de nuestra gama.

Los grados más altos ofrecen una relación rendimiento/acero mejorada en comparación con los grados 355/510 y 500/660, lo que permite seleccionar barras de menor diámetro que, en última instancia, proporcionan ahorros de acero y facilitan los esfuerzos de logística y de instalación.

Las varillas que formaban los tendones largos se anclaron a pilotes de hormigón y se empalmaron con tensores y acopladores.

Se han suministrado un total de 206 toneladas de tirantes marinos para este proyecto de ampliación de Laem Chabang.

Mubarak Al-Kabeer

Publicado en noviembre 6, 2022marzo 14, 2024 por Sir Gwi

Mubarak Al-Kabeer

Mubarak Al-Kabeer es un gran puerto marítimo, situado en la isla de Bubiyan, al este de Kuwait, abierto hacia el Golfo Pérsico.

Dextra ha participado en la Etapa 2 de la primera fase de la construcción, entre 2011 y 2012, junto con Hyundai E&C, el contratista de este proyecto.

Para este gran proyecto, Dextra suministró tirantes marinos para anclar el muelle de la instalación de descarga.

El sistema proporcionado aprovechaba los tirantes Dextra de gran diámetro M134, anclados en las paredes combinadas gracias a jaulas de bolas (capacidad de rotación de ± 10° en todas las direcciones) y tuercas cautivas (capacidad de rotación de ±5° en todas las direcciones).

Para acomodar los tendones largos, proporcionar longitud de ajuste y ofrecer flexibilidad adicional durante la instalación, también se agregaron tensores y acopladores de bisagra (ajuste vertical de ± 90°) en línea cuando fue necesario.

Terminal Internacional de Contenedores de Manila (MICT) – Atracadero 7

Publicado en noviembre 6, 2022marzo 15, 2024 por Sir Gwi

Terminal Internacional de Contenedores de Manila (MICT) – Atracadero 7

En 1988, International Container Terminal Services, Inc. (ICTSI) ganó la concesión por 25+25 años para operar la Terminal Internacional de Contenedores de Manila (MICT), una de las tres terminales del Puerto de Manila.

Desde entonces, MICT ha quintuplicado su capacidad anual, convirtiéndose en la terminal de contenedores más grande y moderna de Filipinas.

Ahora se considera a la par de las mejores terminales del mundo con sus eficiencias garantizadas y sus sistemas operativos y administrativos modernizados.

MICT Berth 7 es el proyecto de expansión del existente Berth 6 que ayudará a aliviar la congestión en los patios de contenedores fuera del muelle.

Dextra participó en el proyecto suministrando 110 juegos de barras de amarre marinas, grado 700, diámetro de barra de 85 mm como anclaje para atar el muro principal de concreto fundido sobre pilotes tubulares de acero a un muro de anclaje de tablestacas conectado con una viga de riel de grúa.

Dextra ofrece su solución de barra de amarre marina en 3 grados de acero, con un límite elástico de hasta 700 Mpa y 22 diámetros de rosca, lo que permite una perfecta adaptación a los requisitos de rendimiento y un uso económico del material.

Categoría: Transporte