广州珠江黄埔大桥钢箱梁涂装技术及质量控制.pdfVIP

78 桥梁建设 2009年第 5期 文章编号 ：1003—4722(2OO9)05—0078—03 广州珠江黄埔大桥钢箱梁涂装技术及质量控制 张建平 (中铁大桥局集团桥科院有限公司，湖北 武汉 430034) 摘 要：广州珠江黄埔大桥地处中等偏重的大气及化学腐蚀环境 ，钢箱梁防腐采用油漆重防 腐涂装体系。钢箱梁外表面采用压力式喷砂机喷砂除锈 ，油漆涂装；钢箱梁内表面采用手持喷砂枪 对底漆完好处扫砂拉毛，对焊缝及底漆破损锈蚀处喷砂除锈 ，油漆涂装 ；钢桥面采用无尘 自动抛丸 机除锈 ，高压无气喷涂机喷涂底漆。严格控制各部位涂装工艺及质量，并提 出施工注意事项。所用 方法能较好地保证施工质量，满足防腐涂装技术要求。 关键词 ：桥梁；钢梁；箱形梁；防腐涂装；施 工工艺；质量控制 中图分类号 ：U445．73 文献标志码 ：A CoatingTechniquesandQualityControlofSteelBoxGirder ofHuangpuBridgeoverZhujiangRiverinGuangzhou ZHANGJian—ping (BridgeScienceResearchInstituteLtd．，ChinaZhongtieMajorBridgeEngineeringGroup，Wuhan430034，China) Abstract：HuangpuBridgeoverZhujiangRiverinGuangzhouislocatedinthemedium and slightly severeatmosphericand chemicalcorrosion environment． The steelbox girder ofthe Bridgeisprotectedagainstthecorrosionbythereinforcinganti—corrosivecoatingsystem ofpaint． Therustontheexteriorsurfacesofthegirderisremovedbysandblastingbythepressuretype sandblastmachineand iscoatedwith paint．Fortheinteriorsurfacesofthegirderwith good primer，thesurfacesarejustroughenedbythehandsandblastgunswhiletherustonthewelding seamsandonthepartswithdamagedprimerisremovedbysandblastingandthesurfaces，weld— ingseamsandpartsarecoatedwithpaint．Therustonthedeckplateofthegirderisremovedby theautomaticdust—freeshot-blastingmachineandissprayedwithprimerbythehighpressureand airlesssprayingmachine．Theworkmanshipandqualityofcoatingon variouspartsofthegirder arerigorouslycontrolledandthemattersofattentionofconstructionareprecautioned．Themeth— odsusedforthecoatingcanwellensuretheconstructionqualityandcansatisfythetechnicalre— quirementsfortheanti—corrosivecoating． Keywords：bridge；steelgirder；boxgirder；anti—corrosivecoating；cons