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随着装配式钢筋砼梁及予应力鋼筋砼梁跨度的增大,架桥机也相应地向大型发展。目前我国除已有的65t及数种80t架桥机外,已制成了1305-58型及59型数台,正在現(?)使用。由于起重能力的增大,軸重的增加,用架桥机架梁时被通过的梁的受力情况将超对中载重設計等級。尤其是採用拨道法架梁,有的竟达45t左右,大大地超对了中-22級。如为了架梁之临时荷载使鋼筋砼梁之設計加強过甚,势必造成浪费。因此架設较大跨度的梁对应採用移梁法或移梁和拨道二者相结合之办法来进行,以減少其对梁的影响。不对采
With the increase of the span of prefabricated reinforced concrete beams and prestressed reinforced concrete beams, the erecting machines also develop to large scale accordingly. At present, in addition to the existing 65t and several kinds of 80t bridge erecting machines, some 1305-58 and 59 models have been made in our country (?). Due to the increase of lifting capacity and the increase of axle load, the design of super-centering load will be overloaded by the force of the beam passing through the frame girder. In particular, the method of using the tramway beam, some as much as about 45t, greatly exceeded the -22 level. For example, the temporary load of the girders strengthens the design of the reinforced concrete beams and will inevitably result in waste. Therefore, the erection of a larger span beam should be carried out by using the method of moving the beam or moving the beam and the track, so as to reduce the influence on the beam. Not mining