连续刚构桥主梁顶推力计算分析及合龙方案研究  

Study of jacking force of girder closure for continuous rigid frame bridge and closure skeme

作　　者：潘国兵[1,2] 刘毅 

机构地区：[1]山区桥梁与隧道工程国家重点实验室培育基地,重庆400074 [2]重庆交通大学土木建筑学院,重庆400074 [3]重庆高新区开发投资集团有限公司,重庆400039

出　　处：《四川建筑科学研究》2012年第4期23-26,共4页Sichuan Building Science

基　　金：山区桥梁与隧道工程国家重点实验室培育基地开放基金(CQSLBF-Y11-4);重庆市教育委员会科学技术研究项目(KJ120402)

摘　　要：混凝土收缩徐变长期作用及温度变化会对连续刚构桥主梁和桥墩的变形及内力产生影响,对于高墩多跨连续刚构桥,合理的合龙方案能优化桥梁在施工阶段和使用阶段的变形,保证高墩的稳定性。本文结合某大桥工程实例,开展多跨高墩连续刚构桥合龙方案及合龙段顶推力的研究,运用有限元软件建模计算出各种合龙方案的理论顶推量,推导出各合龙方案的顶推力,并针对各种合龙方案进行变形和内力的对比分析,确定出最佳的合龙方案。Concrete shrinkage and creep and temperature changes will affect the deformation and stress both girder and the piers of continuous rigid frame bridge, for high pier multi-span continuous rigid frame bridge, reasonable closure scheme can optimize the deformation during the construction stage and service stage. Closure scheme and jacking force of high pier multi-span continuous rigid frame bridge are studied with a project, and theoretic incremental launching value is conducted with finite element software to derive the jacking force. The deformation and internal forces using different closure scheme are compared to decide the optimal closure scheme.

关 键 词：顶推量 顶推力 合龙方案 

分 类 号：U448.33[建筑科学—桥梁与隧道工程]