安庆长江铁路大桥主桥桥塔施工关键技术
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摘要
安庆长江铁路大桥主桥为双塔三索面钢桁梁斜拉桥,桥塔为上倒Y形、下钻石形混凝土结构,高210m。根据该桥塔超高、截面大且设置双层主筋的特点,塔座及下塔柱底节8.5m采用现浇模板支架法施工,其余均采用6m节段液压爬模施工;横梁采用钢管柱支架法、分2层与塔柱结合段同步施工;上塔柱节段采取塔梁同步技术施工。施工时,在塔柱内设置劲性骨架,改进液压爬模系统,在中塔柱两塔肢间设4道钢管横撑;合理配置机械设备,采取大体积混凝土施工工艺控制技术;并采取桥塔线形测量控制等措施确保了施工安全和质量。该桥塔已于2012年9月14日施工完成。
The main bridge of Anqing Changjiang River Railway Bridge is a steel truss girder cable-stayed bridge with double pylons and triple cable planes.The pylons of the bridge,each being 210 m high,are the concrete structures in the shape of inverted Y at the upper parts and of diamond at the lower parts.In the light of the characteristics that the pylons are very high,the sections of the pylons are large and are laid out with two layers of main reinforcement,the bases of the pylons and the 8.5 m bottom segments of the lower pylon columns were constructed by the method of casting-in-situ formwork and scaffoldings while the rest parts of the pylon columns were constructed by the hydraulic climbing formwork in each 6 m segment.The cross beams of the pylons were constructed in each two layers synchronously with the joint sections of the pylon columns,using the method of steel pipe post scaffoldings and the segments of the upper pylon columns were constructed,using the technique of synchronous construction of the pylons and girder.In the construction,the steel framed skeletons were set in the pylon columns to improve the hydraulic climbing system.In between the two middle pylon columns of a pylon,4 temporary steel pipe cross bracings were set.The machinery and equipment were rationally deployed,the construction technology control measures for the massive concrete and the geometric shape survey and control measures for the pylons were taken to finally ensure the construction safety and quality.The construction of the pylons of the bridge was completed on September 14,2012.
The main bridge of Anqing Changjiang River Railway Bridge is a steel truss girder cable-stayed bridge with double pylons and triple cable planes.The pylons of the bridge,each being 210 m high,are the concrete structures in the shape of inverted Y at the upper parts and of diamond at the lower parts.In the light of the characteristics that the pylons are very high,the sections of the pylons are large and are laid out with two layers of main reinforcement,the bases of the pylons and the 8.5 m bottom segments of the lower pylon columns were constructed by the method of casting-in-situ formwork and scaffoldings while the rest parts of the pylon columns were constructed by the hydraulic climbing formwork in each 6 m segment.The cross beams of the pylons were constructed in each two layers synchronously with the joint sections of the pylon columns,using the method of steel pipe post scaffoldings and the segments of the upper pylon columns were constructed,using the technique of synchronous construction of the pylons and girder.In the construction,the steel framed skeletons were set in the pylon columns to improve the hydraulic climbing system.In between the two middle pylon columns of a pylon,4 temporary steel pipe cross bracings were set.The machinery and equipment were rationally deployed,the construction technology control measures for the massive concrete and the geometric shape survey and control measures for the pylons were taken to finally ensure the construction safety and quality.The construction of the pylons of the bridge was completed on September 14,2012.
引文
[1]肖海珠,徐伟,高宗余.安庆铁路长江大桥设计[J].桥梁建设,2009,(5):6-8,20.(XIAO Hai-zhu,XU Wei,GAO Zong-yu.Design of Anqing Changjiang River Railway Bridge[J].Bridge Construction,2009,(5):6-8,20.in Chinese)
[2]蒋本俊.武汉天兴洲公铁两用长江大桥斜拉桥主塔施工技术[J].桥梁建设,2008,(10):10-14.(JIANG Ben-jun.Construction Techniques for Pylons of Cable-Stayed Bridge of Wuhan Tianxingzhou Changjiang River Rail-cum-Road Bridge[J].Bridge Construction,2008,(10):10-14.in Chinese)
[3]张宝刚.劲性骨架在湛江海湾大桥主塔的应用[J].中国新技术新产品,2009,(1):67.(ZHANG Bao-Gang.Application of Steel Framed Skeletons to Pylons of Zhanjiang Bay Bridge[J].China New Technologies and Products,2009,(1):67.in Chinese)
[4]代皓,张瑞霞,张敏.黄冈公铁两用长江大桥桥塔施工技术及分析[J].桥梁建设,2012,42(5):9-14.(DAI Hao,ZHANG Rui-xia,ZHANG Min.Construction Techniques and Construction Process Analysis of Pylons of Huanggang Changjiang River Railcum-Road Bridge[J].Bridge Construction,2012,42(5):9-14.in Chinese)
[5]胡文俊,林强,江海.液压自爬模在忠县长江大桥11号墩主塔施工中的应用[J].世界桥梁,2009,(2):34-36.(HU Wen-jun,LIN Qiang,JIANG Hai.Application of Hydraulic Self-Climbing Form to Construction of Pylon atop Pier No.11of Zhongxian Changjiang River Bridge[J].World Bridges,2009,(2):34-36.in Chinese)
[6]廖小军,段乃民,李勇.湛江海湾大桥中塔柱施工技术[J].中外公路,2006,26(5):34-36.(LIAO Xiao-jun,DUAN Nai-min,LI Yong.Construction Techniques for Middle Pylon Columns of Zhanjiang Bay Bridge[J].Journal of China&Foreign Highway,2006,26(5):34-36.in Chinese)
[7]熊海涛.主塔大体积混凝土防裂控制施工技术[J].安徽建筑,2010,(2):83-84.(XIONG Hai-tao.Construction Techniques for Crack-ing Control of Massive Concrete of Main Pylons[J].Anhui Architecture,2010,(2):83-84.in Chinese)
[8]蒋本俊,刘生奇.武汉二七长江大桥主桥桥塔施工关键技术[J].桥梁建设,2012,42(3):7-13.(JIANG Ben-jun,LIU Sheng-qi.Key Techniques for Construction of Pylon of Main Bridge of Wuhan Erqi Changjiang River Bridge[J].Bridge Construction,2012,42(3):7-13.in Chinese)
[9]周巍,刘志强.斜拉桥塔梁同步施工控制技术的研究[J].黑龙江交通科技,2008,31(8):74-75.(ZHOU Wei,LIU Zhi-Qiang.Study of Control Tech-niques for Synchronous Construction of Pylon and Girder of Cable-Stayed Bridge[J].Communications Science and Technology of Heilongjiang,2008,31(8):74-75.in Chinese)
[10]兰其平,程海琴.武汉二七长江大桥桥塔索道管精密定位方法[J].桥梁建设,2012,42(1):14-18.(LAN Qi-ping,CHENG Hai-qin.Method for Precise Positioning of Cable Ducts in Pylon of Wuhan Erqi Changjiang River Bridge[J].Bridge Construction,2012,42(1):14-18.in Chinese)
[2]蒋本俊.武汉天兴洲公铁两用长江大桥斜拉桥主塔施工技术[J].桥梁建设,2008,(10):10-14.(JIANG Ben-jun.Construction Techniques for Pylons of Cable-Stayed Bridge of Wuhan Tianxingzhou Changjiang River Rail-cum-Road Bridge[J].Bridge Construction,2008,(10):10-14.in Chinese)
[3]张宝刚.劲性骨架在湛江海湾大桥主塔的应用[J].中国新技术新产品,2009,(1):67.(ZHANG Bao-Gang.Application of Steel Framed Skeletons to Pylons of Zhanjiang Bay Bridge[J].China New Technologies and Products,2009,(1):67.in Chinese)
[4]代皓,张瑞霞,张敏.黄冈公铁两用长江大桥桥塔施工技术及分析[J].桥梁建设,2012,42(5):9-14.(DAI Hao,ZHANG Rui-xia,ZHANG Min.Construction Techniques and Construction Process Analysis of Pylons of Huanggang Changjiang River Railcum-Road Bridge[J].Bridge Construction,2012,42(5):9-14.in Chinese)
[5]胡文俊,林强,江海.液压自爬模在忠县长江大桥11号墩主塔施工中的应用[J].世界桥梁,2009,(2):34-36.(HU Wen-jun,LIN Qiang,JIANG Hai.Application of Hydraulic Self-Climbing Form to Construction of Pylon atop Pier No.11of Zhongxian Changjiang River Bridge[J].World Bridges,2009,(2):34-36.in Chinese)
[6]廖小军,段乃民,李勇.湛江海湾大桥中塔柱施工技术[J].中外公路,2006,26(5):34-36.(LIAO Xiao-jun,DUAN Nai-min,LI Yong.Construction Techniques for Middle Pylon Columns of Zhanjiang Bay Bridge[J].Journal of China&Foreign Highway,2006,26(5):34-36.in Chinese)
[7]熊海涛.主塔大体积混凝土防裂控制施工技术[J].安徽建筑,2010,(2):83-84.(XIONG Hai-tao.Construction Techniques for Crack-ing Control of Massive Concrete of Main Pylons[J].Anhui Architecture,2010,(2):83-84.in Chinese)
[8]蒋本俊,刘生奇.武汉二七长江大桥主桥桥塔施工关键技术[J].桥梁建设,2012,42(3):7-13.(JIANG Ben-jun,LIU Sheng-qi.Key Techniques for Construction of Pylon of Main Bridge of Wuhan Erqi Changjiang River Bridge[J].Bridge Construction,2012,42(3):7-13.in Chinese)
[9]周巍,刘志强.斜拉桥塔梁同步施工控制技术的研究[J].黑龙江交通科技,2008,31(8):74-75.(ZHOU Wei,LIU Zhi-Qiang.Study of Control Tech-niques for Synchronous Construction of Pylon and Girder of Cable-Stayed Bridge[J].Communications Science and Technology of Heilongjiang,2008,31(8):74-75.in Chinese)
[10]兰其平,程海琴.武汉二七长江大桥桥塔索道管精密定位方法[J].桥梁建设,2012,42(1):14-18.(LAN Qi-ping,CHENG Hai-qin.Method for Precise Positioning of Cable Ducts in Pylon of Wuhan Erqi Changjiang River Bridge[J].Bridge Construction,2012,42(1):14-18.in Chinese)
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