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2026
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A New Breakthrough in Intelligent Maintenance of Cross-Sea Bridges: Practical Application of an Automatic Spraying System on the Hailing Island Bridge
Automatic Sprinkler Curing Spray System
Author:
Aogong Technical Department
The Hailing Island Bridge is located in the northern waters of the South China Sea, at the southwestern tip of Yangjiang City, Guangdong Province. It serves as a pivotal transportation hub for boosting Yangjiang’s coastal economy and upgrading its cultural‑tourism sector. With a large construction scale, complex offshore working conditions, and stringent construction standards, the project presents significant technical and logistical challenges.
As a coastal cross-sea bridge, it is subjected over the long term to a marine corrosive environment characterized by high salinity, high humidity, and strong winds, placing extremely stringent demands on the durability and corrosion resistance of the bridge’s concrete structures. The construction techniques and process‑control standards far exceed those of typical road and bridge projects. Moreover, during construction, multiple challenges arise: subgrade excavation and earth‑filling operations can easily trigger soil and water erosion; construction machinery and transport vehicles generate persistent noise pollution; and site dust, exhaust emissions, and asphalt fumes further degrade the working environment and impact the surrounding ecosystem. Traditional manual high‑altitude curing operations are fraught with risks, often result in uneven curing, and leave blind spots. If adequate curing is not ensured after concrete placement, thermal‑hydration imbalances can readily lead to internal and external cracking, reducing the tensile and compressive strength of structural members, significantly shortening the bridge’s service life, and driving up subsequent operation and maintenance costs.
Guangzhou Aogong Spray Equipment Co., Ltd. participated in the construction of this bridge. To address the challenges of concrete curing on coastal bridges and ensure safe construction, the company customized… Automatic Spraying Curing System for the Outer Side of the Web at the Bottom of Bridge Girders Guangzhou Aogong boasts extensive experience in spray‑and‑misting curing, serving as the supplier of misting curing systems for major projects such as the Hong Kong–Zhuhai–Macao Bridge, China Three Gorges Corporation, and the Wudongde Hydropower Station. It also provides nozzles, spray heads, and misting equipment to numerous publicly listed companies. Leveraging its reputation for reliable quality and superior service, Guangzhou Aogong has delivered a comprehensive curing solution for this project. The automated misting curing system now deployed integrates an intelligent electrical control system with a precision‑engineered water‑spraying setup. By incorporating a dedicated mobile track, it accommodates curing of multiple structural elements—including precast box girders, beam soffits, and web panels—enabling all‑round, dead‑zone‑free curing operations.
Automatic Spraying Curing System for the Outer Side of the Web at the Bottom of Bridge Girders Based on real-time environmental data—including temperature, humidity, wind speed, and solar irradiance—the system automatically adjusts the duration, frequency, and water volume of sprinkler irrigation, ensuring comprehensive moisture coverage of the beam concrete. This addresses the shortcomings of conventional manual curing, such as uneven wetting and drying, dead‑zone neglect, and inadequate maintenance, thereby effectively mitigating quality risks like early-age cracking and insufficient strength, and significantly enhancing the compactness and durability of bridge structures.
except Spraying In addition to its maintenance functions, the system also delivers environmental benefits and enhances operational efficiency. The fine mist particles generated by atomization can remain suspended in the air, capturing airborne dust at the construction site and achieving dust suppression through gravitational settling. At the same time, the system rapidly absorbs heat from the surrounding air and cools the environment via evaporation, effectively addressing challenges posed by dust and high‑temperature working conditions, thereby improving the overall construction environment. Moreover, it completely eliminates the safety risks associated with manual high‑altitude curing operations at sea, strengthening the safety safeguards on site.
The successful implementation of the automated spray‑curing system on the Hailing Island Bridge has fully met the stringent construction standards for coastal, cross‑sea bridges, ensuring both the quality of concrete placement and the long-term service life of the structure. This has contributed to the project’s timely completion and opening to traffic, while providing a mature, replicable model for intelligent maintenance and curing of large-scale coastal bridges, thereby underscoring Guangzhou Aogong’s technical expertise in engineering spray‑curing and mist‑spraying applications.
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