Resistant Emergency Panel Bridge Galvanized Bailey Bridge 321-Type

Resistant Bailey Emergency Bridge/galvanized Emergency Bailey Bridge

The following conditions need to be met to transform the 321-type Bailey bridge into a two-lane bridge:

- **Structural design**:
- **Use an upper bearing structure**: In order to meet the needs of two-way two-lane roads, an upper bearing structure can be used.
- **The main beam adopts a double-row single-layer unreinforced Bailey beam**: The main beam can adopt a double-row single-layer unreinforced Bailey beam.
- **Bridge deck crossbeam design**: The bridge deck crossbeam adopts I32a I-beams, which are set at a spacing of 0.75 meters. The crossbeam also serves as the connection between the Bailey beam and the crossbeam. [28a-type channel steels are arranged longitudinally side by side on the crossbeam, and 6 mm thick Q235 steel plates are welded on the channel steels (which also serve as the construction template for the bridge deck pavement layer).
- **Bridge deck pavement**: The bridge deck adopts 10 cm thick C40 waterproof concrete as the pavement layer. In order to ensure a good connection between the pavement layer and the bridge deck steel components, M16×60 shear bolts are welded on the steel plate, and the shear bolts are arranged at a spacing of 300 mm×300 mm.
- **Load and stability**:
- **Meet load requirements**: The reconstructed two-lane Bailey bridge must meet the requirements of the corresponding load level, such as car-10, car-15, car-20, crawler-50, trailer-80, etc.
- **Ensure stability**: The pins between the Bailey plates must be inserted properly, the connecting angle steel bolts must be tightened, and the connection between the longitudinal beam and the transverse pad beam must be firm and reliable.
- **Construction conditions**:
- **Construction personnel and equipment**: When manually erecting, there are 30 to 40 workers, and the construction workers must wear safety helmets and safety belts. It is strictly forbidden to work on the shelves after drinking. When hoisting Bailey piers, they should be assembled in layers. It is forbidden to hoist a single set of Baileys to the top at one time. When using a crane to hoist and dismantle Bailey piers, a special person should be assigned to direct the crane. It is strictly forbidden for the crane boom to collide with the Bailey beam and its foundation.
- **Construction site**: When the cantilever push-pull method is used to erect a bridge, there must be an equipment configuration and assembly site on our bank with a length not less than 1.5 times the span of the bridge and a width of 8 to 14 meters. When the terrain is restricted and the assembly and pushing erection method is required, the site length should also be not less than the span of the bridge. The longitudinal slope of the assembly site should not be greater than 3%, and the horizontal direction should be roughly horizontal.
- **Other aspects**:
- **Demarcation and leveling of the bridgehead operation site**: Determine the position of the shore repose angle pile. When the shore slope is steeper (greater than the repose angle), corresponding measures should be taken.
- **Cross-strait conditions**: For a single-span bridge, the horizontal distance between the repose angle piles on both sides should generally be less than 34 meters of the bridge span. The soil at the bridge seats on both sides should be solid. When the soil bearing pressure does not meet the design requirements, the foundation under the bridge seat plate must be expanded or reinforced. The height difference between the two sides should not be greater than 5% of the bridge span.

Specifications:

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Advantage

Possessing the features of simple structure,
convenient transport, speedy erection
easy disassembling,
heavy loading capacity,
great stability and long fatigue life
being capable of an alternative span, loading capacity

Introduction to Jiangsu Zhonghai Bridge Equipment Co., Ltd.
Jiangsu Zhonghai Bridge Equipment Co., Ltd., established in 2010, is a high-tech enterprise specializing in the research, development, manufacturing, and sales of bridge equipment. With a registered capital of 55 million yuan, the company boasts a modern production base and advanced manufacturing facilities, achieving an annual output exceeding 60,000 tons. Its products are widely used in major bridge projects and transportation infrastructure construction both domestically and internationally.
The company consistently prioritizes technological innovation, supported by a skilled R&D team and long-term collaborations with renowned universities and research institutions. By continuously adopting and assimilating international advanced technologies, the company has achieved remarkable results in the fields of bridge steel structures, bridge construction equipment, and bridge inspection equipment. Multiple products have obtained national patent certifications and have been awarded provincial and municipal science and technology progress prizes.
In terms of production management, the company strictly adheres to the ISO9001 quality management system to ensure stable and reliable product quality. With exquisite craftsmanship and a rigorous approach, the company’s products have earned an excellent reputation in the market, serving clients across the country and exporting to regions such as Southeast Asia, the Middle East, and Africa.
Jiangsu Zhonghai Bridge Equipment Co., Ltd. adheres to the business philosophy of “Quality First, Service Excellence,” committed to providing high-quality products and comprehensive services to its clients. Looking ahead, the company will continue to increase investment in R&D, enhance its core competitiveness, and contribute to the development of China’s bridge construction industry, striving to become a global leader in the bridge equipment sector.