Great Wall: In the name of steel, build a bridge for 100 years

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In the current global wave of infrastructure development, steel structure bridges are increasingly becoming a model for modern engineering. They not only embody humanity's pursuit of transportation efficiency but also commit to sustainable development. Behind this steel giant lies the pinnacle of material science —— material supremacy, which is the' genetic selection 'of top-tier global steel mills. As a leading company in China's steel structure bridge sector, Great Wall Enterprise has always adhered to the principle of 'selecting the world's top-grade steel,' dedicated to building steel structure bridges that are durable, safe, and reliable for centuries.

1. materials are the "genes" of Bridges and the cornerstone of a hundred years of life

The century-long lifespan of steel structure bridges begins with the selection of materials. The performance of steel determines the durability, strength, and safety of the bridge. As noted, low-alloy steels (such as ASTM A588 and ASTM A709) are preferred for bridge construction in marine environments and complex terrains due to their excellent corrosion resistance and high strength. Great Wall Heavy Industry has been deeply involved in this field for many years, carefully selecting top-tier steel from global suppliers to ensure that every batch of steel meets the highest international standards.

1.1.Corrosion resistance: meet the Australian AS/NZS 3678 extreme cold coast standard

The steel selected by Great Wall Heavy Industry has been rigorously screened to ensure its corrosion resistance in extreme environments. For instance, the steel meets the Australian AS/NZS 3678 standard, which is designed for extremely cold coastal conditions and sets extremely high standards for corrosion resistance. This means that Great Wall Heavy Industry's bridges can operate stably over long periods in harsh coastal, salt fog, and humid environments without frequent maintenance, truly fulfilling the promise of a' century-long lifespan.'

1.2.Strength guarantee: meet the American ASTM A709 bridge steel ultimate strength requirements

In terms of strength, the steel selected by Great Wall Heavy Industry fully complies with the American ASTM A709 standard, one of the world's leading standards for bridge steel structures. This standard specifies key performance indicators such as minimum yield strength, tensile strength, and toughness, ensuring that bridges remain stable and reliable under heavy loads. The steel from Great Wall Heavy Industry not only meets these standards but has also been certified to European EN 100254, further enhancing its competitiveness in the international market.

1.3.Weldability: Low temperature toughness material certified by European EN 100254

Welding is a critical component in the construction of steel structure bridges. Great Wall Heavy Industry has chosen steel with low-temperature toughness, which can meet the welding requirements in cold environments. This steel has been certified to European EN 100254 standards, ensuring it maintains excellent welding performance even in low temperatures. This material not only enhances the efficiency of bridge construction but also reduces the risks associated with the welding process, providing a solid foundation for the long-term use of the bridge.

2.global supply chain resources to forge an uncompromising quality baseline

Great Wall Heavy Industry understands that selecting the right materials is just the first step; the real challenge lies in transforming these materials into high-quality bridge products. To achieve this, Great Wall Heavy Industry has established a global supply chain resource system and formed long-term partnerships with top international steel mills like Bilei. This ensures that every batch of steel comes from the world's most advanced production lines and that each product undergoes triple certification to ensure it meets the highest international standards.

2.1.Triple authentication system to ensure material quality

Great Wall Heavy Industry has an extremely stringent steel procurement process. Each batch of steel must undergo three layers of certification: International Certification: Steel must meet international standards, such as ASTM, EN, and AS/NZS, to ensure its applicability in various countries and regions. Third-party Testing: Steel is tested by international authoritative institutions like SGS, CCIC, and CNAS to ensure its performance meets design requirements. Internal Audit: Great Wall Heavy Industry has an independent R&D and quality control department that conducts rigorous audits on each batch of steel to ensure it meets the company's internal quality standards. This three-tier certification system not only ensures the stability of materials but also enhances Great Wall Heavy Industry's reputation in the international market.

3.Modular design of steel structure bridge to improve construction efficiency and quality

In the manufacturing process of steel structure bridge, modular design is the key to improve efficiency and quality. Great Wall Heavy Industry has successfully realized the modular production of steel structure bridge by virtue of its professional design team and advanced manufacturing technology, which greatly shortens the construction period, reduces the cost and improves the overall performance of the bridge.

3.1.Professional design team, supported by international standards

The design team at Great Wall Heavy Industry is composed of professors from prestigious Chinese universities. They possess both profound theoretical knowledge and extensive practical engineering experience. During the design process, they adhere strictly to international standards such as AISC (American Institute of Steel), BS5400 (British Standards Institution), and AS5100 (Australian Standards), ensuring the scientific and rational design of bridges. Additionally, Great Wall Heavy Industry has independently developed a steel structure bridge design software that can automatically generate the optimal design solution based on specific bridge requirements, thereby enhancing design efficiency and accuracy.

3.2.Modular manufacturing to improve construction efficiency

Great Wall Heavy Industry possesses a complete production line for bridge construction, capable of modular manufacturing of steel structure bridges. This method not only boosts production efficiency but also reduces construction complexity. Modular components are manufactured in the factory and then transported to the construction site for assembly, significantly reducing on-site construction time and costs. For instance, the large-span prefabricated D-type bridge developed by Great Wall Heavy Industry can span up to 91 meters and has completed load testing and engineering applications. This bridge design, with its large span and simple construction, is particularly well-suited for use in complex terrains.

3.3.Welding process, in line with the highest international standards

Welding is a critical component in the manufacturing of steel structure bridges. Great Wall Heavy Industry uses steel with excellent welding properties, and its welding techniques meet the highest international standards. For instance, the AWSD1.5 standard adopted by Great Wall Heavy Industry is one of the most stringent in global welding standards, ensuring the strength and durability of the welded joints. Furthermore, Great Wall Heavy Industry has obtained the EN1090 CEDoP certification, which ensures that the welding process complies with European standards, further enhancing the overall quality of the bridge.

4.other core advantages of Great Wall Heavy Industry

In addition to material selection and modular design, Great Wall Heavy Industry also has a number of core advantages in the manufacturing of steel structure Bridges, which makes it highly competitive in the international market.

4.1.Surface treatment process to improve the durability of the bridge

Great Wall Heavy Industry has a variety of surface treatment processes, including sand, dip paint, spray paint, hot galvanizing, zinc aluminum alloy coating, etc., which can effectively improve the corrosion resistance of steel. These processes not only extend the service life of Bridges, but also reduce maintenance costs, providing guarantee for the long-term operation of Bridges.

4.2.Environmental protection concept, promoting green construction

Great Wall Heavy Industry has always adhered to the concept of environmental protection and adopted mechanical galvanizing process in the manufacturing process, which not only solved the dilemma that high-strength bolts could not be hot-dip galvanized, but also made up for the limitation of coating thickness in the galvanizing process. This process is pollution-free to the environment and conforms to the development trend of modern green buildings.

4.3.Patent technology, leading industry innovation

Great Wall Heavy Industry has a number of self-developed patents, including 321 type Berre steel bridge, 200 type Berre steel bridge, large span prefabricated D-type bridge, etc. These patents not only enhance the technical strength of Great Wall Heavy Industry, but also provide strong support for its competitiveness in the international market.

5.International vision and social responsibility of Great Wall Heavy Industry

Great Wall Heavy Industry is not only a company dedicated to the manufacturing of steel structure bridges but also one with an international perspective and a strong sense of social responsibility. The company has established strong partnerships with major central enterprises such as China Communications Construction Company and China Metallurgical Group, actively engaging in international projects and exporting to dozens of countries and regions. Additionally, Great Wall Heavy Industry is deeply involved in charitable activities, aiming to promote social welfare. The company sets its strategic goal on 'starting from a winning point, high quality, and branding,' continuously refining production processes, enhancing efficiency, and maintaining production quality at international standards to boost its global competitiveness.

6.conclusion: in the name of steel, build a bridge for a hundred years

In the current global wave of infrastructure development, steel structure bridges are increasingly becoming a model for modern engineering. Great Wall Heavy Industry, in this field, focuses on material dominance and leverages the 'gene selection' from top-tier global steel mills to create steel structure bridges that are durable, safe, and reliable for a century. Looking ahead, Great Wall Heavy Industry will continue to uphold the spirit of 'daring to fight tough battles and capable of winning them,' dedicated to building a brand as robust, enduring, and heritage-driven as the 'Splendid Great Wall,' contributing to global infrastructure development.