Zhenjiang Jinhao Road & Bridge Supporting Engineering Co., Ltd.

Zhenjiang Jinhao Road
& Bridge

Jinhao Road & Bridge is an engineering-oriented manufacturer specializing in temporary bridge systems and bridge construction equipment.

We provide integrated solutions covering design, fabrication, installation, and rental, with core products including Bailey bridge systems, form travelers, and steel formwork, serving highway, railway, municipal, and water infrastructure projects worldwide.

Product Category

+Bailey Bridge

Prefabricated steel highway bridges are a type of modular bridge that can be quickly erected and are primarily used for emergency repairs. These bridge components have the following characteristics:1. They are made of high-strength steel and are fully welded. The main beams are generally detachable lightweight trusses, assembled in three-dimensional or planar units, connected by single pins or bolts. They are lightweight, making transportation and disassembly convenient.2. The components are interchangeable and can be reused multiple times.3. The combination of the bridge's main beams can be adjusted according to the span and load capacity.Since World War II, several major countries have standardized and produced their own bridge repair equipment. For example, the former Soviet Union's "PMM" had an upper-supported, triangular truss main beam with three-dimensional assembly units. Japan's "Type 99" military bridge also used a triangular truss main beam with three-dimensional assembly units, primarily for railway bridge repair. This equipment can still be seen in my country's railway departments and some highway construction units, where it is often used as construction equipment. As early as the beginning of World War II, in 1938, Britain and the United States adopted the "Bailey bridge," a steel truss bridge designed by British engineer Donald Bailey, as a military bridge for the Allied forces. This bridge was widely used in Europe and the Far East during World War II, and was further improved and developed after the war.My country's prefabricated highway steel bridges were standardized and put into production in the 1960s, originally called the "321" highway steel bridge. The state arranged for three designated factories to produce them, with an annual output of approximately 1500-2000 tons, stored throughout the country. This equipment played an important role in disaster relief (such as the Tangshan earthquake) and border self-defense counterattacks. In 1992, during peacekeeping operations in Cambodia, Chinese engineering troops used domestically produced "321" highway steel bridge components on Highway 6, repairing bridges at a rate of one bridge every two days, completing the erection of six highway bridges on a 217 km road section within 15 days, receiving high praise from the United Nations peacekeeping forces. The "321" highway steel bridge produced in my country is similar to the British "Bailey bridge," with the main beams also being lattice trusses, but the dimensions are different. The Bailey bridge uses imperial units, while the "321" highway steel bridge uses metric units, and these two types of equipment cannot be mixed. Workers on some construction sites in my country often refer to the domestically produced "321" highway steel bridge trusses as "Bailey trusses." Bailey bridge components in my country have undergone continuous updates and evolution to adapt to the needs of more applications. The gradually emerging HD200 type Bailey bridge further improves the bending and shear resistance of the steel bridge, developing towards larger spans and heavier loads. In the housing sector, it can be combined into an aerial frame structure, serving as a construction platform, and gradually climbing upwards through the coordination of hydraulic jacking structures. As a cast-in-place support structure, the Bailey bridge components are modified into an upper-bearing structure, supplemented with beams, supports, and other materials, which can be used for formwork and concrete pouring.

+Cantilevered Launching Gantry

The cantilevered launching gantry is a core specialized equipment for cantilever casting construction of large-span bridges, widely used in highway and railway bridge construction, especially suitable for complex terrain scenarios such as crossing rivers, valleys, and existing lines. It is a key equipment for achieving high-altitude cantilever construction of bridges. This product is mainly made of steel structure, adopts a modular design, and can be gradually moved forward with the construction progress. It combines precise positioning and stable load-bearing performance, providing a safe and reliable working platform for the casting of the bridge's main girder.The core advantages of the cantilevered launching gantry are extremely significant. Its lightweight structural design combines high strength and rigidity, with a low self-weight ratio, effectively reducing the additional stress on the bridge's main girder during construction and ensuring casting accuracy. The equipment is highly adaptable and can be flexibly adjusted according to the bridge section size and span requirements, eliminating the need for large-area site layout and greatly reducing the difficulty of construction in complex terrain. At the same time, it is easy to operate, has good forward movement synchronization, high construction efficiency, and is equipped with a complete safety protection system, effectively avoiding high-altitude work risks. Compared with traditional construction equipment, the cantilevered launching gantry has a shorter construction period and less interference with the surrounding environment, significantly improving project quality and construction safety. During use, it is necessary to strictly verify the assembly accuracy and stress state of the launching gantry, and regularly check the tightness of the connecting parts and the wear of the structure; during construction, load limits must be followed, and illegal stacking of materials is strictly prohibited, while simultaneously implementing windproof and anti-overturning measures. With its core characteristics of "efficiency, precision, and safety," the cantilevered launching gantry has become the preferred equipment in the field of large-span bridge construction, demonstrating strong practical engineering value.

+Bridge Steel Formwork

Bridge steel formwork is a core supporting equipment for concrete construction of highway and railway bridges. It is widely used in the forming of bridge piers, abutments, box girders, T-beams, and other components, and is a key facility for ensuring the dimensional accuracy and appearance quality of concrete structures. Made from high-quality steel, and processed through precision cutting and welding, this product features a regular structure, tight joints, and strong load-bearing capacity. It can accurately adapt to the construction needs of different cross-sectional shapes and sizes, providing a stable and reliable forming platform for concrete pouring.The core advantages of bridge steel formwork are particularly prominent. Compared with traditional wooden formwork, it offers superior strength and rigidity, effectively resisting concrete lateral pressure and preventing construction deformation and warping, significantly improving the accuracy of component forming. The smooth and flat surface of the formwork results in excellent concrete appearance after demolding, eliminating the need for additional complex finishing and significantly shortening the construction cycle. It also boasts excellent reusability; with proper rust removal and maintenance, it can be used repeatedly, reducing material costs and minimizing construction waste, thus balancing economic efficiency and environmental protection. Furthermore, its convenient assembly and good sealing prevent leakage and reduce rework, effectively guaranteeing project quality. During use, the assembly accuracy, flatness, and connection tightness of the bridge steel formwork must be strictly checked to ensure consistency with the design dimensions; rust removal and application of release agent should be performed before pouring, and the stress state of the formwork should be monitored in real time during pouring to avoid local overloading or uneven stress distribution. With its core characteristics of "precision, durability, and efficiency," it has become the preferred equipment for high-quality bridge construction, demonstrating its indispensable practical value in various bridge construction projects.

Production Process