论文部分内容阅读
为了配合叁标桥(72)0123单线铁路栓焊下承桁梁的安装架设,我们与第一、二铁路设计院共同编制了一套拖拉法施工的通用设计图,图号为叁标桥(72)0124。根据几年来的施工情况,中等跨度的下承桁梁,多采用在岸上拼好后纵向拖拉的架设方法。其主要优点是:①由于目前钢桁梁在深谷或常年有水的河流上修建较多,采用拖拉法较钢梁在满布脚手架上拼装为经济,同时在通航河流上施工时也不影响通航,②安装精度容易保证;③与悬臂拼装比较,纵向拖拉从开始拼梁到就
In order to cooperate with Sanbiao Bridge (72) 0123 for the installation and installation of the truss girder under single-track railway welding, we have jointly developed a common design drawing of the towing construction with the first and second railway design institutes, the figure number is Sanbiao Bridge 72) 0124. According to the construction situation over the past few years, the middle-span truss girder, the more use of the shore spell after the longitudinal drag-and-set method. Its main advantages are as follows: (1) Since the current steel truss girders are built more often in deep valleys or perennial rivers, they are more economical than steel girders to be assembled on scaffolding covered by scaffolding and meanwhile they are not affected by the construction of navigable rivers , ② easy to ensure the accuracy of the installation; ③ compared with the cantilever assembly, vertical drag to fight from the beginning