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钢管混凝土拱桥因美观的外型和优良的材料性能而受青睐。由于钢管混凝土拱桥施工中拱肋的线形控制及应力状态复杂,所以是控制的重点和难点。在线性控制方面,钢管拱肋的加工及拱肋梁段的拼装是线性控制的基础和能否顺利施工的保证。为了保证钢管拱肋的线形,传统采用现场预拼的方法。现场预拼对场地条件要求高,耗时耗钱,施工对拱肋段损伤大,有时根本无法实现全跨预拼。所以,亟需一种快捷的方法对加工质量进行检验和拼装模拟;在混凝土灌注施工中,钢管拱的结构刚度随着加载施工不断变化,稍有不慎就可能引发工程事故。为了保证施工安全,提高灌注质量,必须进行应力测试与监控。本文试图通过衡南桥施工控制中利用计算机辅助线形检测及预拼装模拟和运用计算程序模拟加载分析,优化加载程序,介绍一种在钢管混凝土拱桥施工过程中的计算机辅助施工方法。
Concrete-filled steel tube arch bridges are favored for their aesthetic appearance and excellent material properties. Due to the linear control of arch ribs and the complicated stress state during the construction of CFST arch bridge, it is the key and difficult point of control. In terms of linear control, the processing of steel arch ribs and the assembly of arch rib beams are the basis of linear control and the guarantee of smooth construction. In order to ensure the linear arch rib, the traditional method of pre-fight site. Site pre-fight on the site conditions require high, time-consuming and costly construction of arch rib damage, and sometimes simply can not achieve full cross-pre-fight. Therefore, there is an urgent need to test and assemble the simulation of the machining quality. In the concrete pouring construction, the structural rigidity of the steel pipe arch changes constantly with the loading and construction, and the slightest mistake may cause the engineering accident. In order to ensure the construction safety and improve the quality of perfusion, stress testing and monitoring must be carried out. This paper attempts to simulate the loading analysis and optimize the loading process by computer-aided linear detection and pre-assembly simulation and application of calculation program in Hengnan Bridge construction control. A computer-aided construction method in the construction of CFST arch bridge is introduced.