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(接上期)悬臂浇注施工悬臂浇注施工是预应力混凝土连续箱梁施工的一种比较常用的方法。一般采用挂篮进行悬臂浇注施工,节段长度一般为3~5m,混凝土重量在150t以内。在斜拉桥施工中,一般采用牵索挂篮,节段长度可以达到8m左右。由于在混凝土重量作用下挂篮产生变形,预应力张拉后梁体也产生变形,因此在浇注混凝土前挂篮除应消除非弹性变形外,还需根据计算结果设置预拱度。应根据设计要求在施工中调整梁体的线形,以保证梁体顺利合龙和成桥线形。宦在混凝土初凝时间内完成混凝土浇
(Continued) Cantilever Casting Construction cantilever pouring construction of prestressed concrete continuous box girder construction is a more common method. Generally used hanging cantilever pouring construction, segment length is generally 3 ~ 5m, concrete weight less than 150t. Cable-stayed bridge construction, the general use of cable hanging basket, the segment length can reach about 8m. Due to the deformation of the hanging basket under the weight of the concrete, the beam body also deforms after the prestressed tensioning. Therefore, the pre-camber should be set according to the calculation results in addition to the inelastic deformation before the hanging basket is poured concrete. Should be based on the design requirements in the construction of beam alignment, in order to ensure smooth beam closure and linear bridge. Huan completed the concrete pouring time in the concrete pouring