某连续梁桥主桥为预应力混凝土变截面连续箱梁,采用悬臂浇筑法施工。以施工监控中实测数据为依据,采用有限单元法进行计算,分析悬臂施工中挠度和应力控制问题,以保证桥梁能够按照设计标准顺利完成合龙并达到理想的线形。同时保证主梁在施工过程以及成桥后的应力,使其不致过大而偏于不安全。 A continuous girder bridge is a prestressed concrete continuous cross-section box girder, the use of cantilever pouring construction. Based on the measured data in the construction monitoring, finite element method is used to calculate the deflection and stress control problems in cantilever construction so as to ensure the bridge can reach the ideal linear shape successfully according to the design standards. At the same time to ensure the main beam in the construction process and the bridge after the stress so that it will not be too large and partial to unsafe.