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吉迈黄河大桥第二孔桥面,系采用苏联1954年二月九日苏联汽车运输与公路部颁布的“苏联桥涵标准图第10～11册”20米跨径H—13,拖一60级载重的预制装配式上部构造。为了解决缺乏震捣设备,便于人工灌注和插捣钢筋混凝土,将主梁宽度由15厘米改为18厘米,隔梁由宽13厘米改15厘米,使净保护层由1厘米增加至2.5厘米,另外为便于预制施工,将原设计桥面板改为同厚12厘米,每具T字梁重约23吨左右。我们缺乏此项施工经验,工地没有起重机械,小钢轨或平车等设备,级研究后决定利用三个手摇轻型绞车(5吨一具,3吨二具),四个千斤顶(15吨二只,10吨二只),四个工地自制方形沙箱采取平拉和下降过程进行安装,兹将安装过程介绍如下:
Jimai Yellow River Bridge second hole deck, the Department of the Soviet Union on February 9, 1954 the Soviet Union Ministry of Transport and the Ministry of Highway promulgated the “Soviet Bridge Culvert Figure 10 ~ 11” 20 meters span H-13, drag a 60 Load-bearing prefabricated superstructure. In order to solve the problem of lack of vibrating equipment and convenient artificial perfusion and ramming of reinforced concrete, the width of the main girder was changed from 15 centimeters to 18 centimeters, the girder was changed from 13 centimeters to 15 centimeters, the net protective layer was increased from 1 centimeter to 2.5 centimeters, Easy to prefabricated construction, the original design bridge deck to the same thickness 12 cm, each T beam weighs about 23 tons. We lacked this construction experience. There were no lifting equipment, small rails or flat cars on the site. After the research, we decided to use three hand-light winches (5 tons and 3 tons), four jacks (15 tons Two, 10 tons two), four site-made square sand box to pull and drop the process of installation, the installation process will be introduced as follows: