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南澳跨海大桥钻孔平台钢管桩直径为1m,管壁厚12mm。整条桩长35～39m 不等,管桩外部加衬板,施工量大,焊接变位多,施工工艺也较复杂,故焊接方法不宜采用埋弧自动焊和半自动焊;另外,由于大桥工地地处南澳岛,岛上风沙大,也不宜使用 CO_2气体保护焊。鉴于上述原因及减小施工成本考虑,整个钢管桩制作采用手工电弧焊。虽然手工电弧焊具有设备简单,操作灵活等特点,但也容易产生各种焊接缺陷。只有有效地减少焊接缺陷的形成,才能确保管桩质量达到技术规范的要求。
South Australia Bridge Bridge drilling platform steel pipe pile diameter of 1m, wall thickness 12mm. The whole pile length 35 ~ 39m range, the external pile pipe lining, large amount of construction, welding displacement, the construction process is more complex, so the welding method should not be used submerged arc welding and semi-automatic welding; In addition, the bridge site Is located in Nan’ao Island, the island windy sand, it is not appropriate to use CO_2 gas shielded welding. In view of the above reasons and to reduce the cost of construction considerations, the entire production of steel pipe using manual arc welding. Although manual arc welding equipment with simple, flexible operation, but also prone to a variety of welding defects. Only effectively reduce the formation of welding defects, in order to ensure the quality of pipe piles to meet the technical specifications.