摘要
本文以某大桥为工程依托,箱梁采用悬臂浇筑法施工,分1#~7#块对梁段,即5m×3.5m+2m×4m进行对称悬臂浇筑,通过连续梁桥施工主要是控制桥梁的整体标高和纵向曲线顺滑,平面位置通过锁定可以有效的控制,竖向挠度控制的好坏直接影响到连续梁桥成桥后投入使用后下的线形变化。因此,预应力混凝土连续梁桥施工控制的原则是主要控制主梁的设计达标程度和线形平稳性,其次是保证不同梁段产生的应力在设计和质量要求范围内。该大桥施工现场的线性监控中,一般悬臂施工过程中节段梁段都是静定状态,合拢中不另行增加重量,成桥过后内形状都是处在偏离设计值差距,为以后同类桥梁的施工提供参考与借鉴。
In this paper,a bridge is used as an engineering support.The box girder is constructed by a cantilever casting method,and the beam section,that is,5m×3.5m+2m×4m,is cast symmetrically by a 1#~7#block.The construction of the continuous beam bridge is mainly to control the overall elevation and the longitudinal curve of the bridge.The plane position can be effectively controlled by locking,and the vertical deflection control directly affects the linear change of the continuous beam bridge after the bridge is put into service.Therefore,the construction control principle of the prestressed concrete continuous beam bridge is the main control of the design standard and the linear stability of the main beam,and the second is to ensure that the stress produced by the different beam sections is within the design and quality requirements.In the linear monitoring of the construction site of the bridge,the section beam section in the general cantilever construction process is in a static state,the weight is not added separately in the closure,and the inner shape after the bridge is in a deviation from the design value,so as to provide reference and reference for the construction of similar bridges in the future.
作者
魏志勇
杨晓红
Zhiyong Wei;Xiaohong Yang(Zhejiang Handover Hongdu Transportation Construction Co.,Ltd.Hangzhou 310051,China)
出处
《青海交通科技》
2019年第6期89-94,共6页
Qinghai Transportation Science and Technology
关键词
桥梁工程
变截面连续箱梁
施工线形控制
bridge engineering
variable cross section continuous box girder
construction alignment control
