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采用高强钢的预应力混凝土,使桥梁工程得到新的发展。预应力混凝土提供了结构设计上多种多样的可能性。上部构造的断面将缩小,桥梁跨径将逐渐增大。预应力混凝土桥超过了迄今仅仅由钢桥所保持的跨径为100米的范围。德意志联邦共和国建的钢筋混凝土桥与钢桥的比例,按数量为85:15,按长度为74:26。更长和更高的桥梁施工是通过不接触地面能垂直和水平移动的模板和支架来完成的,就象用滑动和活动的模板于建筑高桥墩,以及悬
The use of high strength steel prestressed concrete, the bridge project has been a new development. Prestressed concrete offers a wide range of possibilities in structural design. The cross section of the upper structure will be reduced, the bridge span will gradually increase. Prestressed concrete bridges exceed the range of 100 meters spanned to date by steel bridges alone. The ratio of reinforced concrete bridges to steel bridges built in the Federal Republic of Germany is 85:15 in number and 74:26 in length. Longer and taller bridges are constructed by using templates and brackets that can be moved vertically and horizontally without touching the ground, just as sliding and moving panels are used to build tall piers,