文章來源：上海國資委(wei) 發布時(shi)間：2015-05-05
由上海建工一建集團承(cheng)擔的昆山中(zhong)環北(bei)線快速化(hua)改造項目金雞河輔道(dao)橋(qiao)左側拱橋(qiao)鋼拱肋(lei)吊(diao)裝(zhuang)近全(quan)面(mian)完成，創出了拱橋(qiao)90米(mi)跨徑(jing)鋼拱肋(lei)吊(diao)裝(zhuang)的“上海記錄”。
昆(kun)山中環(huan)北線快速化改造項目(mu)金雞河輔道橋(qiao)由(you)左、右(you)雙幅組(zu)成，主(zhu)橋(qiao)結構采用鋼管(guan)(guan)混凝土系桿拱(gong)(gong)，其中左右(you)幅的鋼管(guan)(guan)拱(gong)(gong)橋(qiao)主(zhu)跨(kua)計算跨(kua)徑(jing)(jing)均為90米(mi)，橋(qiao)寬(kuan)18.5米(mi)，主(zhu)拱(gong)(gong)是由(you)直徑(jing)(jing)Φ900米(mi)的雙管(guan)(guan)焊(han)(han)接而成的啞(ya)鈴拱(gong)(gong)，斷面(mian)高2.2米(mi)，矢高18米(mi)。根(gen)據(ju)鋼管(guan)(guan)拱(gong)(gong)肋(lei)二次拋物(wu)線啞(ya)鈴式拱(gong)(gong)型(xing)的結構設(she)(she)計特點，結合運輸(shu)及吊裝(zhuang)架設(she)(she)的條件，將(jiang)主(zhu)拱(gong)(gong)肋(lei)每根(gen)拱(gong)(gong)肋(lei)分(fen)為7個節(jie)(jie)段，其中2個節(jie)(jie)段為預埋節(jie)(jie)段，采用先單(dan)根(gen)單(dan)節(jie)(jie)拱(gong)(gong)肋(lei)組(zu)裝(zhuang)、焊(han)(han)接，然后(hou)5節(jie)(jie)拱(gong)(gong)肋(lei)連續匹配(pei)預拼裝(zhuang)。整個吊裝(zhuang)過程中，工程技術人(ren)員采用兩臺全站儀(yi)控制(zhi)拱(gong)(gong)軸(zhou)線，控制(zhi)就位的精度(du)，并在下拱(gong)(gong)圈下部設(she)(she)置千斤頂，微調(diao)拱(gong)(gong)肋(lei)標高。