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国内现行规范对桥梁设计提出的要求是适用、经济、安全、美观,这些要求基本上包含了人们关心的所有重要问题。具体的设计过程按承载能力和正常使用两种极限状态来进行。大跨度预应力混凝土变截面连续箱梁桥具有结构刚度大、变形小、行车平顺舒适、伸缩缝少、抗震能力强等优点,因此无论是公路或城市桥梁、高架道路,还是跨越宽阔河流的大桥,均是首选的桥型方案之一。但作为全预应力混凝土的大跨度连续箱梁,在施工阶段或使用过程中,普遍出现各种不同性质不同类型的裂缝本文分析了大跨度连续梁桥施工控制的方法、对箱形截面的温度场进行了观测,并用观测结果剔除温度对施工控制的影响。
The current domestic norms of bridge design requirements are applicable, economic, security, aesthetics, these requirements basically include all the important issues of concern. The specific design process by carrying capacity and normal use of two extreme conditions to carry out. Large span prestressed concrete continuous box girder with variable cross section has the advantages of large structural rigidity, small deformation, smooth and comfortable driving, less expansion joint and strong anti-seismic capability. Therefore, whether it is a highway or an urban bridge, an elevated road or a bridge spanning a wide river , Are one of the preferred bridge type solutions. However, as a kind of long-span continuous box girder with fully prestressed concrete, cracks of different types and different types generally occur during the construction phase or during the operation. The method of construction control of long-span continuous girder bridge is analyzed in this paper. Field observations were made and the effects of temperature on construction control were excluded from the observations.