世界桥梁
世界橋樑
세계교량
WORLD BRIDGE
2014年
4期
74-78
,共5页
王毅%程波%谢波%周松国
王毅%程波%謝波%週鬆國
왕의%정파%사파%주송국
连续刚构桥%桥墩%钢管混凝土叠合柱%屈曲分析%施工偏差%应力%有限元法%高空吊装%高抛免振混凝土
連續剛構橋%橋墩%鋼管混凝土疊閤柱%屈麯分析%施工偏差%應力%有限元法%高空弔裝%高拋免振混凝土
련속강구교%교돈%강관혼응토첩합주%굴곡분석%시공편차%응력%유한원법%고공조장%고포면진혼응토
continuous rigid-frame bridge%pier%concrete-filled steel tubes and reinforced con-crete composite column%buckling analysis%construction deviation%stress%finite element method%overhead hoisting and installation%high dropping vibration-free concrete
腊八斤特大桥主桥为连续刚构，采用钢管混凝土叠合柱桥墩（由4根外侧包裹钢筋混凝土的钢管混凝土柱组成，柱之间采用钢筋混凝土腹板连接，桥墩为内部空心结构），最高桥墩高182．64 m。为给高墩的施工及质量控制提供理论依据，采用ABAQUS和MIDAS软件对高墩进行屈曲和受力分析，研究墩顶施工偏差和支撑对高墩极限承载力的影响。结果表明：桥墩极限承载力随墩顶施工偏差的增大而不断减小；横撑和斜撑对高墩的整体稳定极限承载力影响较小。为减少施工过程对桥墩极限承载力的影响，保证墩身线形和施工质量满足要求，研究了高墩施工技术，即采用全站仪和激光垂准仪开展高墩中心、垂直度及高程监测，采用高抛免振捣、对角线对称浇筑混凝土和钢结构高空吊装等施工技术。实桥应用表明，实际累计施工偏差约为0．072 m ，满足施工过程中高墩线形及其它质量控制要求。
臘八斤特大橋主橋為連續剛構，採用鋼管混凝土疊閤柱橋墩（由4根外側包裹鋼觔混凝土的鋼管混凝土柱組成，柱之間採用鋼觔混凝土腹闆連接，橋墩為內部空心結構），最高橋墩高182．64 m。為給高墩的施工及質量控製提供理論依據，採用ABAQUS和MIDAS軟件對高墩進行屈麯和受力分析，研究墩頂施工偏差和支撐對高墩極限承載力的影響。結果錶明：橋墩極限承載力隨墩頂施工偏差的增大而不斷減小；橫撐和斜撐對高墩的整體穩定極限承載力影響較小。為減少施工過程對橋墩極限承載力的影響，保證墩身線形和施工質量滿足要求，研究瞭高墩施工技術，即採用全站儀和激光垂準儀開展高墩中心、垂直度及高程鑑測，採用高拋免振擣、對角線對稱澆築混凝土和鋼結構高空弔裝等施工技術。實橋應用錶明，實際纍計施工偏差約為0．072 m ，滿足施工過程中高墩線形及其它質量控製要求。
석팔근특대교주교위련속강구，채용강관혼응토첩합주교돈（유4근외측포과강근혼응토적강관혼응토주조성，주지간채용강근혼응토복판련접，교돈위내부공심결구），최고교돈고182．64 m。위급고돈적시공급질량공제제공이론의거，채용ABAQUS화MIDAS연건대고돈진행굴곡화수력분석，연구돈정시공편차화지탱대고돈겁한승재력적영향。결과표명：교돈겁한승재력수돈정시공편차적증대이불단감소；횡탱화사탱대고돈적정체은정겁한승재력영향교소。위감소시공과정대교돈겁한승재력적영향，보증돈신선형화시공질량만족요구，연구료고돈시공기술，즉채용전참의화격광수준의개전고돈중심、수직도급고정감측，채용고포면진도、대각선대칭요축혼응토화강결구고공조장등시공기술。실교응용표명，실제루계시공편차약위0．072 m ，만족시공과정중고돈선형급기타질량공제요구。
The main bridge of Labajin Bridge is a continuous rigid-frame structure ,the piers a-dopt the concrete-filled steel tubes and reinforced concrete composite columns (a column is formed of four concrete-filled steel tubes that are externally encased with reinforced concrete ,the four steel tubes are linked to each other by reinforced concrete webs and the overall column is hollow in-side .) ,with the highest pier rising to 182 .64 m .To provide theoretical reference for the construc-tion and quality control of high-rise piers ,the ABAQUS and MIDAS software were used to analyze the buckling and load bearing condition of the concrete-filled steel tubular composite columns to study the impact of pier-top construction difference and supporting on the ultimate load bearing ca-pacity of high-rise piers .The results of the study showed that the ultimate load bearing capacity of piers gradually reduced as the construction deviation on pier tops increased .T ransverse struts and oblique struts had minor effect on the overall stability and the ultimate load bearing capacity of concrete-filled steel tubular composite column piers .To reduce the impact of construction process on the ultimate load bearing capacity of piers and ensure that the geometrical shape of pier shafts and the construction quality meet the requirements ,the construction techniques for high-rise piers were studied .The total station and laser vertical collimator were applied to monitor the center , verticality and elevation of the high-rise piers .T he construction techniques of high dropping vibra-tion-free concreting ,symmetrical diagonal concreting and overhead hoisting and erection of steel structures were used .The engineering experience proves that the measured accumulated construc-tion deviation is about 0 .072 m ,w hich can meet the geometry and other quality control require-ments for high-rise piers during construction .
