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(一)小跨径结构装配式钢筋混凝土桥近年来在各个工业发达的国家有较迅速的发展,中、小跨径的桥在公路上使用的数量最多,因此更宜于工业化地制造和安装。公路桥梁跨径大小的分布据苏联1959年从七条线路的调查资料看,每1000公里的情况如表1,15米以下跨径的占桥梁总跨数的88.3%,其中10及12.5米跨径的跨数即占总跨数的70.4%,其钢筋混凝土用量占总量的54.6%。
(A) small-span structure Prefabricated reinforced concrete bridge in recent years in all industrialized countries have a more rapid development, medium and small span of the bridge on the road to use the largest number, it is more suitable for industrial manufacturing and installation . Spread distribution of highway bridges According to the survey data of the Soviet Union from seven lines in 1959, the situation of every 1,000 kilometers is as shown in Table 1. The spans below 15 meters accounted for 88.3% of the total span of the bridge, of which 10 and 12.5 meters span Of the span that is 70.4% of the total span, the amount of reinforced concrete accounted for 54.6% of the total.