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1956年我局修建了一座装配式钢筋混凝土桥,计3孔净跨10公尺,全长44.68公尺,上部构造为装配式,下部构造为重力式就地灌注混凝土墩台,载重标准为汽—13及拖—60,桥面宽7.0公尺,人行道宽0.75公尺。兹将该桥设计施工经过扼要介绍如下,并略述我们对装配式桥的几点体会。一、上部构造的设计本桥上部构造标准图主要钢筋是用螺纹钢筋。但在当时未能置到,乃改用3号钢筋代替。按照二局××桥改变设计图纸施工,就是将38公厘圆普通竹节钢代替32公厘螺纹钢,以19公厘代替16公厘,以12公厘代替12公厘。在前面两种钢筋代替后断面增加了41％,而受外力的
In 1956, the Bureau constructed a prefabricated reinforced concrete bridge with a 3-hole net span of 10 meters and a total length of 44.68 meters. The upper structure is an assembly type and the lower structure is a gravity type concrete pouring concrete piers. The load standard is steam -13 and drag -60, deck width of 7.0 meters, 0.75 meters wide sidewalk. This bridge design and construction will be briefly described below, and outlined our assembly bridge experience. First, the design of the structure of the upper part of the bridge construction of the standard diagram of the main rebar is reinforced. But at that time failed to set, is replaced by No. 3 steel instead. In accordance with the XX Bureau of XX bridge to change the design drawings, is to replace 38 mm ordinary bamboo steel instead of 32 mm rebar, 19 mm instead of 16 mm, 12 mm instead of 12 mm. After replacing the two sections in front of the reinforced section increased by 41%, while the external force