大溪河特大橋索梁錨固構(gòu)造焊接工藝研究

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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

大溪河特大橋主橋采用跨徑布置為 9 2 m+ 1 6 8 m + 6 5 0 m+ 1 6 8 m+ 9 2 m 五跨雙塔雙索面工字梁鋼混組合梁斜拉橋，斜拉索扇形布置，主橋全長(zhǎng) 1 1 7 0 m 橋型布置如圖1所示；主要材質(zhì)為 鋼、Q 4 2 0 q D 鋼，總重1.63萬(wàn)余t。（剩余4507字）