某钢板桩围堰施工监测与分析
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摘要
钢板桩围堰广泛应用于江河湖海等水中承台的施工。因其水文地质环境多变,钢板桩围堰及其内支撑的安全性难以保证。鉴于此,针对武汉二七长江大桥5号桥墩钢板桩围堰,在理论分析的基础上通过现场实测,获得了各工况下围堰内支撑的受力情况;基于桩底约束为铰接等假定,建立SAP2000三维有限元分析模型,获得了各工况下钢板桩围堰及其内支撑体系的结构变形、构件受力和整体振型,并与现场实测结果进行了比较分析,二者基本一致。
Steel-sheet-pile cofferdam has been widely used in construction of water caps in rivers and lakes.Because the hydro geological environment is erratic,the safety of the cofferdam is difficult to ensure.In view of this,for the steel-sheet-pile cofferdam of Erqi Yangtze River Bridge during construction,stress states of internal braces of the cofferdam in different working-cases were measured.Based on the assumption that the cofferdam bottom is articulated,three-dimensional FEM analysis model was established using SAP2000.The calculated results were compared with the measurements,which showed that both are consistent.
Steel-sheet-pile cofferdam has been widely used in construction of water caps in rivers and lakes.Because the hydro geological environment is erratic,the safety of the cofferdam is difficult to ensure.In view of this,for the steel-sheet-pile cofferdam of Erqi Yangtze River Bridge during construction,stress states of internal braces of the cofferdam in different working-cases were measured.Based on the assumption that the cofferdam bottom is articulated,three-dimensional FEM analysis model was established using SAP2000.The calculated results were compared with the measurements,which showed that both are consistent.
引文
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[9]崔春义,黄建,孙占琦.不同水位下钢板桩围堰工作性状有限元分析[J].广西大学学报,2010,35(1):187-192.Cui C Y,Huang J,Sun Z Q.FEM analysis of work-ing performance of a cofferdam system with steel sheetpiles under different water heights[J].Journal ofGuangxi University,2010,35(1):187-192.(inChinese)
[10]谢子山.丙洲大桥承台钢板桩围堰的设计与施工[J].黑龙江科技信息,2007,10(1):216-217.Xie Z S.Design and construction of the steel-sheet-pile cofferdam for the construction of the BingzhouBridge[J].Technology information in Heilongjiang,2007,10(1):216-217.(in Chinese)
[2]徐伟,吕凤梧.深水区域特大型施工平台与钢吊箱结构分析方法[M].北京:中国建筑工业出版社,2009.Xu W,Lv X W.Large construction platform in deepwater and structural analysis methods of steel box[M].Beijing:China Architecture and BuildingPress,2009.(in Chinese)
[3]徐赞云,徐伟.某钢吊箱施工过程有限元分析[J].结构工程师,2010,(3):150-155.Xu Z Y,Xu W.Finite Element Analysis on the Con-struction Process of A Steel Suspension Box Cofferdam[J].Structural Engineers,2010,(3):150-155.(inChinese)
[4]谢小松,徐伟,宋灿.深水高桩承台哑铃状钢吊箱在地震作用下的响应分析[J].结构工程师,2005,21(6):43-45.Xie X S,Xu W,Song C,et al.Response analysis ofelevated pile foundation dumbbell-shape steel suspen-ding cofferdam in deep water under seismic action[J].Structural Engineers,2005,21(6):43-45.(in Chinese)
[5]孙旻,徐伟.苏通大桥6号墩钢吊箱施工阶段有限元分析[J].施工技术,2005,34(1):12-14.Sun M,Xu W.The Application of finite-element a-nalysis to the steel lifting caisson of the sixth pier ofSutong bridge in construction process[J].Construc-tion Technology,2005,34(1):12-14.(in Chinese)
[6]徐伟,高吉龙.特大型钢吊箱围堰施工过程中各工况的受力特性分析[J].建筑施工,2008,30(6):487-489.Xu W,Gao J L.Mechanical analysis of suspendedsuper-huge steel box cofferdam under different con-struction conditions[J].Building Construction,2008,30(6):487-489.(in Chinese)
[7]吴加云,徐伟,邹建文.特大型钢吊箱在波浪荷载作用下动力响应研究[J].岩土工程学报,2008,30(S):234-237.Wu J Y,Xu W,Zou J W.Dynamic property of hugesteel suspending cofferdam under wave load[J].Chi-nese Journal of Geotechnical Engineering,2008,30(S):234-237.(in Chinese)
[8]马栋财.大跨度斜拉桥变形监测研究[J].测绘学报,2002,3:279-282.Ma D C.Deformation monitoring of span cable-stayedbridge[J].Surveying and Mapping,2002,3:279-282.(in Chinese)
[9]崔春义,黄建,孙占琦.不同水位下钢板桩围堰工作性状有限元分析[J].广西大学学报,2010,35(1):187-192.Cui C Y,Huang J,Sun Z Q.FEM analysis of work-ing performance of a cofferdam system with steel sheetpiles under different water heights[J].Journal ofGuangxi University,2010,35(1):187-192.(inChinese)
[10]谢子山.丙洲大桥承台钢板桩围堰的设计与施工[J].黑龙江科技信息,2007,10(1):216-217.Xie Z S.Design and construction of the steel-sheet-pile cofferdam for the construction of the BingzhouBridge[J].Technology information in Heilongjiang,2007,10(1):216-217.(in Chinese)
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