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基本介紹

蘭州東崗黃河(he)大橋自1999年3月18日開工(gong)，2002年10月建成投(tou)入使用。

蘭州(zhou)東崗黃(huang)河大橋在施(shi)(shi)工(gong)(gong)(gong)(gong)時(shi)遇(yu)到了(le)(le)(le)較大的(de)困難，在施(shi)(shi)工(gong)(gong)(gong)(gong)過程中，由于(yu)技(ji)術人(ren)員(yuan)年輕，而且(qie)該(gai)橋所(suo)采(cai)(cai)用(yong)的(de)懸(xuan)(xuan)臂澆注(zhu)工(gong)(gong)(gong)(gong)藝(yi)是(shi)施(shi)(shi)工(gong)(gong)(gong)(gong)人(ren)員(yuan)前(qian)(qian)所(suo)未見的(de)。因此施(shi)(shi)工(gong)(gong)(gong)(gong)走過了(le)(le)(le)很多的(de)曲(qu)折(zhe)道路(lu)，首先是(shi)圍(wei)(wei)堰(yan)便橋被水沖垮，接(jie)著(zhu)又(you)是(shi)樁基(ji)施(shi)(shi)工(gong)(gong)(gong)(gong)遇(yu)到問題(ti)，好在這些(xie)困難的(de)出現，引起了(le)(le)(le)足夠的(de)重視，及時(shi)采(cai)(cai)取了(le)(le)(le)措施(shi)(shi)，才(cai)使得橋梁施(shi)(shi)工(gong)(gong)(gong)(gong)順利進行。該(gai)橋4個(ge)主墩位于(yu)河流深水之中，基(ji)礎施(shi)(shi)工(gong)(gong)(gong)(gong)特別(bie)是(shi)承(cheng)臺施(shi)(shi)工(gong)(gong)(gong)(gong)遇(yu)到了(le)(le)(le)前(qian)(qian)所(suo)未有的(de)新問題(ti)，為了(le)(le)(le)確保河水中承(cheng)臺的(de)施(shi)(shi)工(gong)(gong)(gong)(gong)質量和(he)安全，我提出了(le)(le)(le)采(cai)(cai)用(yong)沉入式混凝土套箱圍(wei)(wei)堰(yan)技(ji)術，成(cheng)功(gong)地解決了(le)(le)(le)這一難題(ti)。橋梁上構施(shi)(shi)工(gong)(gong)(gong)(gong)采(cai)(cai)用(yong)掛(gua)藍懸(xuan)(xuan)臂澆注(zhu)，每(mei)個(ge)墩柱先形(xing)成(cheng)“T”構，再進行體系轉化，形(xing)成(cheng)連續梁，上構施(shi)(shi)工(gong)(gong)(gong)(gong)的(de)關鍵就(jiu)是(shi)施(shi)(shi)工(gong)(gong)(gong)(gong)設(she)備---掛(gua)藍的(de)制作，還有懸(xuan)(xuan)臂澆注(zhu)和(he)合(he)龍問題(ti)，對于(yu)這些(xie)全新的(de)課(ke)題(ti)，通(tong)過年輕的(de)技(ji)術人(ren)員(yuan)的(de)公關，總算(suan)獨立設(she)計完(wan)成(cheng)任(ren)務。

建筑設計

蘭州東(dong)崗(gang)黃河大(da)橋(qiao)(qiao)東(dong)崗(gang)黃河大(da)橋(qiao)(qiao)南(nan)起雁兒灣，北到(dao)青白石楊家灣，全長(chang)450．131米，總(zong)寬(kuan)21．5米，主橋(qiao)(qiao)跨徑(jing)為(wei)52m+3×80m+52m，引(yin)橋(qiao)(qiao)為(wei)4×25米，橋(qiao)(qiao)梁由左右兩幅組成，位(wei)于半(ban)徑(jing)420米的平曲(qu)線(xian)上。

蘭州東崗黃河大橋(qiao)(qiao)(qiao)(qiao)其主橋(qiao)(qiao)(qiao)(qiao)采(cai)(cai)用(yong)(yong)兩個獨立平行(xing)的單箱(xiang)單室(shi)截(jie)面(mian)，左右幅(fu)主橋(qiao)(qiao)(qiao)(qiao)均(jun)(jun)采(cai)(cai)用(yong)(yong)52m+3×80m+52m的變截(jie)面(mian)預應力混(hun)凝土連(lian)續箱(xiang)梁(liang)，大橋(qiao)(qiao)(qiao)(qiao)忠和岸(an)位于A=220、R=420m的平曲線(xian)上，橋(qiao)(qiao)(qiao)(qiao)軸線(xian)與水流方向夾角112°，引(yin)橋(qiao)(qiao)(qiao)(qiao)為(wei)等(deng)(deng)截(jie)面(mian)鋼筋(jin)混(hun)凝土連(lian)續箱(xiang)梁(liang)，左右幅(fu)的橋(qiao)(qiao)(qiao)(qiao)跨布置分別為(wei)18.318m+3×25m和4×25m。橋(qiao)(qiao)(qiao)(qiao)梁(liang)全寬21.50m，橫向布置為(wei)0.5m（防(fang)撞護欄）+9.5m（行(xing)車道(dao)）+1.5m（中央分隔帶(dai)）+9.5m（行(xing)車道(dao)）+0.5m（防(fang)撞護欄）。主橋(qiao)(qiao)(qiao)(qiao)下部采(cai)(cai)用(yong)(yong)獨立的鋼筋(jin)混(hun)凝土圓形柱式(shi)墩，過渡墩和引(yin)橋(qiao)(qiao)(qiao)(qiao)橋(qiao)(qiao)(qiao)(qiao)墩采(cai)(cai)用(yong)(yong)雙柱式(shi)橋(qiao)(qiao)(qiao)(qiao)墩，橋(qiao)(qiao)(qiao)(qiao)臺為(wei)肋式(shi)臺，基礎(chu)均(jun)(jun)為(wei)樁基。全橋(qiao)(qiao)(qiao)(qiao)均(jun)(jun)采(cai)(cai)用(yong)(yong)KPZ系列(lie)抗震盆式(shi)橡(xiang)膠支座(zuo)。橋(qiao)(qiao)(qiao)(qiao)梁(liang)設(she)計(ji)荷載采(cai)(cai)用(yong)(yong)汽車-超20，掛-120，按地震基本(ben)烈度8度設(she)計(ji)，設(she)計(ji)洪水頻率為(wei)1/300，通航等(deng)(deng)級(ji)(ji)按Ⅴ級(ji)(ji)航道(dao)設(she)計(ji)。

功能價值

蘭州(zhou)(zhou)東崗黃河(he)大橋的建成(cheng)將使自蘭州(zhou)(zhou)過(guo)境的大部分(fen)車輛從這里分(fen)流(liu)，從而有效緩解蘭州(zhou)(zhou)市區(qu)的交通緊張狀(zhuang)況，減輕市區(qu)空氣污染。