论文部分内容阅读
我国铁路桥梁绝大多数都是采用混凝土梁,普通混凝土、钢筋混凝土和预应力混凝土梁占桥梁总长的4/5,但设计跨度多在32米以下。究其原因,这些梁多是由工厂预制后经铁路输送到现场的。由于受到制梁工艺、车辆长度、铁路限界和架设能力的限制,跨度到32米就徘徊不前了。 为了发展造桥技术,根据铁道部科技发展计划,铁道建筑研究设计院、第十三工程局和第一勘测设
The vast majority of China’s railway bridges are the use of concrete beams, ordinary concrete, reinforced concrete and prestressed concrete beams account for the total length of 4/5 bridges, but the design span of more than 32 meters. The reason, these beams are mostly prefabricated by the factory transported by rail to the scene. Due to the beam-making process, the length of the vehicle, the limits of the railway and the erection capacity, the span of 32 meters was stagnant. In order to develop bridge technology, according to the Ministry of Science and Technology Development Plan, Railway Construction Research and Design Institute, the thirteenth Engineering Bureau and the first survey set