论文部分内容阅读
广州新客站主站房结构体系复杂,下部为铁路桥梁结构,中间为大跨度预应力混凝土框架结构,屋顶为大跨度预应力钢结构屋盖。为满足工期要求,采用逆作法施工方案,即先施工屋顶钢结构,然后再施工下部轨道梁、落客平台及高架层结构,此方案最终为钢结构安装、V构梁和21 m高架候车层等重要节点工程节约工期45～60 d。为了考察逆作法施工和后期预应力混凝土张拉对屋顶预应力钢结构的影响,建立整体模型,按照实际逆作法施工顺序进行了施工模拟计算,并与一次加载模型结果进行对比,为屋顶预应力钢结构拉索张拉方案的制定提供了可靠理论依据,为工程顺利施工提供参考。
Guangzhou New Passenger Station main station complex structure of the house, the lower part of the railway bridge structure, the middle of the long-span prestressed concrete frame structure, the roof of the long-span prestressed steel roof. In order to meet the requirements of the construction period, a reverse construction method was adopted, that is, construction of the roof steel structure, and then construction of the lower rail beam, the landing platform and the elevated structure. The solution was finally completed for steel structures, V-girders and 21 m elevated shelters Other important node projects save 45 to 60 days. In order to investigate the influence of reverse construction and post-tensioning of prestressed concrete on the roof prestressed steel structure, the overall model was established and the construction simulation was carried out according to the construction sequence of the actual reverse construction method. Compared with the results of one-time loading model, The establishment of tensioning plan of steel cable provides a reliable theoretical basis for the smooth construction of the project to provide a reference.