【作者】 陈应高；

【导师】 卜一之；

【作者基本信息】 西南交通大学 ， 桥梁与隧道工程， 2008， 硕士

【摘要】 随着斜拉桥跨径的不断增大,其施工过程也正变得越来越复杂,施工控制技术在斜拉桥的施工中显得越来越举足轻重。论文将从基本理论和实际运用两方面,以苏通大桥的施工监控工作为工程背景来阐述几何控制法。这种方法是以组成整座斜拉桥各部分构件的无应力几何尺寸,如斜拉索的无应力索长、钢箱梁的无应力线形及索塔钢锚箱的节段的无应力制造几何要素来主导施工控制。它的基本观点是:只要组成斜拉桥结构各个构件的无应力长度和无应力曲率一定,则结构施工完成后结构的最终内力状态和位移状态与结构的具体施工过程无关。这为斜拉桥的施工控制提供了极大的方便,在保证工程质量的同时也为斜拉桥在施工过程中实现多工序同步作业创造了条件。论文首先介绍几何控制法的理论基础,从理论分析中得到这种方法的基本观点,并由此了解几何控制法的特点和优点:然后讨论钢箱梁理论无应力线形的求解方法、钢箱梁的安装线形和无应力线形之间的相互关系以及斜拉索无应力索长的计算方法;最后分析在实际施工过程中有哪些因素会对主梁的无应力线形的造成怎样的改变,并讨论如何将这种带有误差的实际无应力线形带入到计算模型中去以便评价该无应力线形的误差会对各施工阶段以及成桥状态造成的影响。更多还原

【Abstract】 With the increase span of cable-stayed bridge, the construction process is also becoming more and more complex, construction control technology of cable-stayed bridge has become increasingly important.Based on the construction control of Sutong Bridge, this thesis will discuss the Geometric Control Method from the two aspect of basic theory and practical application. This method mainly control the unstress geometry size of each components of the whole cable-stayed bridge such as the unstress length of cable, unstress geometry of steel box girder and unstress geometric size of steel anchor boxes segments. The basic point is: as long as the unstress length and unstress curvature of each components in the cable-stayed bridge structure remain unchanged, after the bridge is completed the final status of internal forces and the displacement is the same, and is unrelated to the specific construction process of the bridge.This construction control method offer great convenience to the cable-stayed bridge construction , not only the quality of the project is guaranteed, but at the same time achieve more procedure of the cable-stayed bridge construction could be fulfilled. First of all, introduce the basic theories of Geometric Control Method, through the theoretical analysis we can draw the basic points of this method, and to know the characteristics and advantages of the Geometric Control Method;Then disscuss the calculation method of steel box girder unstress geometry, the relationship between assembled geometry and its unstress geometry, and the calculation method of unstress cable length. And finally, analysis which factors in the process of construction have an impact on profile of unstress geometry and how it works, and then discuss how to put the actual unstress geometry which include error into the calculation model to evaluate the influence of the error in each construction stage and the final stage.更多还原