【作者】 胡清和；

【导师】 涂凌； 周水兴；

【作者基本信息】 重庆交通大学 ， 结构工程， 2009， 硕士

【摘要】 随着桥梁工程的设计理论日趋完善及施工工艺的不断进步,连续刚构桥以其结构稳定性好,跨越能力强,施工进度快,造价经济,行车舒适等优势在桥梁家族中起着举足轻重的作用(稳步崛起),在跨径100-300m具有较强的竞争力。但其设计理论和施工技术方面还存在一些问题。本文以重庆到长沙公路酉阳至大涵段的何家坝大桥为依托工程,分析多跨连续刚构桥构造参数及合龙问题,开展了以下工作:1)针对依托项目,建立多个数值模型,进行参数化分析,研究梁高、梁底线形变化对连续刚构桥受力的影响,得到了梁体内力随梁高及梁底线形变化的规律;2)讨论连续刚构桥墩截面的构造,分析双薄壁墩的截面构造及受力情况,讨论了影响双薄壁高墩的屈曲稳定因素,得出风荷载和合龙顶推力对薄壁高墩的稳定性影响较大的结论;3)讨论了多跨连续刚构桥合龙时主要影响因素,提出了顶推量和顶推力的计算方法;4)针对六跨一联的何家坝大桥,通过分析比较,提出了边跨→中跨→次中跨的合龙顺序比边跨→次中跨→中跨的合龙顺序更合理的建议,具有顶推力小和顶推效果好的优点。更多还原

【Abstract】 With the advance of the theory of bridge design and continuous improvement of the construction technology , the Continuous rigid frame bridge plays an important role(Steady rise) in the bridge family according to its good structural stability , cross-ability , expressed construction progress , economic cost , comfortable traveling and so on. This bridge type has strongly competitive when span between one hundred and three hundred meters. However, there are still some questions on the theory of its design and construction process.Basing on the He Jia Ba Bridge which situates in highway of Chongqing to Changsha belonging to the paragraph of You Yang to Da Han, this paper analyse structural parameters and closure Technic of the Multi-span Rigid-frame Bridge.The main job to do is as the following:1)Basing on the Hejiaba Bridge, sevral calculation models are set up to analyse the influence to the bearing of continuous rigid frame bridge with different hight of beam and variable line of beam bottom2)The structure of cross-section of pier in Continuous rigid frame bridge is discussed, analyse the structure of cross-section of double thin-walled pier and its bearing, discuss the factors that affected the stability of double-buckling thin-walled high pier.The results indicate that the wind load and closure jacking force are the main influences for the stability of double-buckling thin-walled high pier.3)Discussed the key factors to be considered when the multi-span continuous rigid frame bridge close up , put forward the method of calculating the pushing volume and introduced the method of calculating the jacking force.4)Contrary to The He Jia Ba Bridge (Six cross-linked), through the Selection of the close up programs, Proposed and demonstrated the close up orders: Fist side span ,second medium span and last other medium span .Before closuring , the method has the merit of small jacking force and obvious effect.更多还原