長(zhǎng)江上游懸索橋淺灘區(qū)鋼箱梁架設(shè)施工技術(shù)
發(fā)布時(shí)間:2018-01-09 14:16
本文關(guān)鍵詞:長(zhǎng)江上游懸索橋淺灘區(qū)鋼箱梁架設(shè)施工技術(shù) 出處:《世界橋梁》2017年03期 論文類(lèi)型:期刊論文
更多相關(guān)文章: 懸索橋 鋼箱梁 淺灘區(qū) 浮吊船 纜載吊機(jī) 拖船轉(zhuǎn)運(yùn) 航道管制 施工技術(shù)
【摘要】:重慶市江津中渡長(zhǎng)江大橋主橋?yàn)橹骺?00m鋼箱梁懸索橋,位于長(zhǎng)江上游,北岸主跨淺灘區(qū)為蓮花石實(shí)景保護(hù)文物,不能爆破及挖掘,北岸淺灘區(qū)鋼箱梁共22個(gè)節(jié)段,在枯水期運(yùn)輸鋼箱梁時(shí)不能保證運(yùn)梁駁船按時(shí)供梁。對(duì)設(shè)置圍堰蓄水方案、運(yùn)輸船底部設(shè)置浮運(yùn)氣囊方案、浮吊船轉(zhuǎn)運(yùn)方案和拖船轉(zhuǎn)運(yùn)方案進(jìn)行對(duì)比分析,考慮施工難易程度、對(duì)環(huán)境影響、經(jīng)濟(jì)性等因素,確定鋼箱梁采用拖船轉(zhuǎn)運(yùn)方案架設(shè)。施工時(shí),運(yùn)輸船將北岸淺灘區(qū)鋼箱梁運(yùn)輸至南岸纜載吊機(jī)正下方后進(jìn)行拋錨定位,纜載吊機(jī)將待轉(zhuǎn)運(yùn)梁段提起,駛離鋼箱梁運(yùn)輸船,拖船驅(qū)使小型駁船至南岸纜載吊機(jī)正下方將鋼箱梁裝于小型駁船上,拖船驅(qū)使小型駁船按照事先選擇的航線行駛,將鋼箱梁運(yùn)輸至北岸纜載吊機(jī)正下方進(jìn)行起吊安裝。
[Abstract]:The main bridge of Jiang Jin Zhongdu Yangtze River Bridge in Chongqing is a 600m steel box girder suspension bridge, which is located in the upper reaches of the Yangtze River. There are 22 sections of steel box girder in the north bank shoal area. When transporting steel box girder in the dry season, the beam can not be guaranteed to supply the beam on time. For setting up cofferdam water storage scheme, floating airbag scheme is set at the bottom of the carrier. By comparing and analyzing the transfer scheme of floating crane and tugboat, considering the factors of construction difficulty, environmental influence and economy, it is determined that the steel box girder should be set up by tugboat transfer scheme. The ship will ship the steel box girder in the north shore shoal area to the south bank cable crane directly below the anchor positioning cable crane will be transferred to the girder section lifted away from the steel box girder transport ship. Tugboats drive small barges to the south shore cable crane directly below the steel box girder mounted on small barges tugs drive small barges according to the route of choice. Transport the steel box girder to the north shore cable crane for lifting installation.
【作者單位】: 中建六局橋梁有限公司;
【分類(lèi)號(hào)】:U445.4;U448.25
【正文快照】: 1工程概況重慶市江津中渡長(zhǎng)江大橋主橋?yàn)橹骺?00 m的懸索橋(見(jiàn)圖1),橋面寬33m,設(shè)置雙向6車(chē)道。主橋加勁梁采用正交異性板流線型扁平鋼箱梁(見(jiàn)圖2),標(biāo)準(zhǔn)梁段長(zhǎng)12m,梁高3m,寬33m,全橋共分主跨50個(gè)節(jié)段和南邊跨5個(gè)節(jié)段,最大節(jié)段梁重約307t。北邊跨為現(xiàn)澆混凝土箱梁。圖1主橋立面
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