大溪河特大桥索梁锚固构造焊接工艺研究

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Abstract： Daxi River Bridge adopts steel-concrete composite beam cable-stayed bridge，whose external steel anchor pipe anchorage system is an important design innovation of the whole steel bridge structure.The anchoring web is an important force transfer member，which isconnectedaround bythe welding of fullpenetration.Therefore，the welding production of cable beam anchorage structure of Daxi River bridge is the key to the succesful manufacture of the steel bridge structure.The welding process is summarized from the welding method，the welding consumables， groove form of the joint， welding preheating， welding sequence，specification parameters，nondestructive testing requirements， welding number requirements，so as to provide reference for the optimization of cable beam anchorage structure welding process and the intelligent improvement of welding equipment in the future.

Keywords：anchoring for cable and beam; structure of external anchor pipe;hardened and tempered stel; full penetration around the plate

1序言

大溪河特大桥主桥采用跨径布置为 9 2 m+ 1 6 8 m + 6 5 0 m+ 1 6 8 m+ 9 2 m 五跨双塔双索面工字梁钢混组合梁斜拉桥，斜拉索扇形布置，主桥全长 1 1 7 0 m 桥型布置如图1所示；主要材质为 钢、Q 4 2 0 q D 钢，总重1.63万余t。（剩余4507字）