我厂生产的某桥3×64米铁路箱形钢梁桥的断面如图1(竖肋未示),每段长10～12米,段与段之间用拼接板连接,每段又分上下两层,上下层腹板用水平连接板连接,隔板用拼接板连接,这些连接均采用23毫米的孔径、M22毫米高强度螺栓。为对制造工艺和装备进行核查,取得一些必要的数据和经验,以便给正式生产创造条件,故选定该桥的 G2段为试验段。该段已于1978年9月制成。通过试验段的制造,对“加大孔径无胎制造箱形梁”的问题谈谈个人的看法。箱形梁的断面连接宜采用φ24.5毫米工地螺栓孔、M22毫米高强度螺栓,这样在工厂 I produced a bridge section of 3 × 64 m steel box girder bridge section shown in Figure 1 (vertical ribs are not shown), each length of 10 to 12 meters, between the segments with the splice plate connection, each sub-sub Up and down two layers, the upper and lower web connected by a horizontal plate, the partition plate with a splice, these connections are used 23 mm aperture, M22 mm high strength bolts. In order to verify the manufacturing process and equipment and to obtain the necessary data and experience so as to create conditions for formal production, the G2 section of the bridge was selected as the test section. This paragraph was made in September 1978. Through the manufacture of test sections, we will talk about personal opinions on the issue of “increasing the diameter of box-shaped beams without holes”. Box girder section connection should adopt φ24.5 mm site bolt hole, M22 mm high strength bolts, so in the factory