| 摘要: | 橋梁的耐久性和生命週期與環境腐蝕因子密切相關，因此各單位都高度重視橋梁的使用壽命和安全性問題，特別是濱海橋梁更容易受到環境影響而產生劣化和缺陷。因此，在考慮橋梁所在的環境、位置以及導致腐蝕的原因時，需要特別謹慎。
台灣的臨海鋼橋長期處於高度腐蝕的環境中，附著鹽量大，且大部分皆臨近工業區，因此常為C5等級以上之腐蝕環境。為了減少未來的維護成本並降低腐蝕對橋梁的影響，需要對鋼橋的防蝕塗裝材料、工法以及維護管理系統進行深入研究和探討，而因本研究工址於臨海之高濕度、高鹽份之環境，應用厚塗型耐濕氣環氧樹脂鋅粉底漆具有較好之施工條件、附著力、抗濕性等特質，以提高鋼橋的使用年限。
大園區彩虹橋塗裝維護除鏽以30000PSI水刀除鏽，分6層(底漆第一道、底漆第二道、中塗漆第一道、中塗漆第二道、面漆第一道、面漆第二道)塗裝，塗裝前以5000PSI水刀清理表面，並落實查驗水刀水壓、環境溫溼度、含鹽量、附著度等檢驗，確保塗裝品質。維護階段建議進行定期橋梁清洗，減少鹽分等腐蝕因子沉積於橋體，降低腐蝕的可能，進而提高橋梁耐久性。
;The durability and service life of bridges are closely related to environmental corrosion factors, so various units attach great importance to the service life and safety issues of bridges, especially coastal bridges, which are more susceptible to environmental influences leading to deterioration and defects. Therefore, when considering the environment, location, and causes of corrosion of bridges, special caution is required.
Taiwan′s coastal steel bridges are exposed to highly corrosive environments for extended periods, with high salt deposition, and most are located near industrial areas, making them often subject to corrosion environments of C5 grade or higher. In order to reduce future maintenance costs and minimize the impact of corrosion on bridges, in-depth research and discussion on anti-corrosion coating materials, construction methods, and maintenance management systems for steel bridges are necessary.
This study takes the maintenance project of the Rainbow Bridge in the Dayuan District as an example, exploring the relevant construction methods and maintenance management practices for C5 grade or higher bridge painting maintenance in the planning and design stage, construction and painting stage, and future maintenance stage, in order to extend the service life of the steel bridge.
The Rainbow Bridge in Dayuan District is maintained by using a 30000PSI water jet for rust removal, followed by a 6-layer painting process (first coat of primer, second coat of primer, first coat of intermediate paint, second coat of intermediate paint, first coat of topcoat, second coat of topcoat). Before painting, the surface is cleaned with a 5000PSI water jet, and inspections are carried out to ensure the quality of the painting, including checking water jet pressure, environmental temperature and humidity, salt content, adhesion, etc. It is recommended to regularly clean the bridge during the maintenance phase to reduce the deposition of corrosive factors such as salt on the bridge structure, thereby reducing the possibility of corrosion and improving the durability of the bridge. |
