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文章叙述了用绝对标高法和相对标高法在控制横梁标高时的各自特点及计算方法,在此基础上着重介绍了相对标高法在茅草街大桥横梁标高控制中的应用。相对标高法在确定连续梁和连续刚构主梁的立模标高中已有所应用,将此方法运用到钢管混凝土拱桥横梁标高控制上来尚为少数。采用此方法确定横梁标高,横梁定位标高与安装顺序无关,定位可在任何时间进行,温度修正容易处理。实践证明此方法在工程应用中是切实可行的,对同类型桥梁横梁的定位具有一定的借鉴意义。
The article describes the absolute elevation method and the relative elevation method in the control of the elevation of the beam when the characteristics and calculation methods, based on the emphasis on the relative elevation method in the Maochiao Street beam elevation control. The relative elevation method has been applied in determining the vertical elevation of continuous beams and continuous rigid-frame main girders. It is still a small number to apply this method to the elevation control of concrete-filled steel tube arch bridges. Using this method to determine the beam elevation, beam positioning elevation has nothing to do with the installation sequence, positioning can be carried out at any time, temperature correction easy to handle. Practice has proved that this method is feasible in engineering application, and has certain reference significance for the positioning of the same type of bridge beam.