論溫州市七都大橋北汊橋關(guān)鍵施工技術(shù)

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摘  要：溫州市七都大橋北汊橋?yàn)橹骺?60 m的鋼混疊合梁斜拉橋，大橋具有結(jié)構(gòu)新穎、施工難度大、質(zhì)量要求高等特點(diǎn)。在大橋施工過程中，樁基施工采用旋挖機(jī)成孔工藝，主墩承臺(tái)采用鋼吊箱圍堰施工工藝，下塔柱采用無支架鋼模、中上塔柱采用爬模施工工藝、鋼梁采用浮吊和橋面吊機(jī)安裝的施工工藝。

關(guān)鍵詞：樁基;鋼吊箱;索塔;鋼混疊合梁

中圖分類號(hào)：U445        文獻(xiàn)標(biāo)志碼：A          文章編號(hào)：2095-2945（2022）03-0158-05

Abstract： The north branch bridge of Qidu Bridge in Wenzhou City has a main span of 360 m steel-concrete composite beam cable-stayed bridge， which has the characteristics of novel structures， difficult construction and high requirements for quality. During the construction of this bridge， the rotary digging machine hole forming technology is adopted in the pile foundation construction， and the steel suspension box cofferdam construction technology is adopted in the main pier cap. The lower tower column is constructed through non-support steel formwork， the middle and upper tower columns involve climbing form construction technology， and the steel beam is built using the floating crane and bridge deck crane installation construction technology.

Keywords： pile foundation; steel box; cable tower; steel-concrete composite beam

1 工程概況

1.1 工程簡介

溫州市七都大橋北汊橋工程連接溫州市鹿城區(qū)和永嘉縣，工程主線南接七都南汊橋預(yù)留終點(diǎn)處，起點(diǎn)處完善七都側(cè)互通，主線向北跨越甌江，終點(diǎn)位于104國道前，并預(yù)留溫州繞城高速公路烏?；ネㄆ瘘c(diǎn)，同時(shí)與104國道新建一處樞紐互通，工程主線總長1 866 m。（剩余6636字）