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随着国民经济的不断发展,国省干线公路上的大量老旧桥梁很难满足现代交通物流的需求,一些原设计标准低、通行能力差的桥梁,亟待进行改造。但在某些特殊区域,受自然条件的限制,在旧桥仍有利用价值的情况下,尽可能的对原桥改造加固,使之焕发新的生机。在沙滩桥的改造加固设计中,根据原有桥型结构,因地制宜,谨慎决策,充分利用其力学特征,采用辅助手段与工艺提升主梁强度、强化整体结构提高桥梁承载能力、拓宽桥面、满足交通车流需求,对咽喉路段的旧桥改造加固、延寿利用进行了探索。
With the continuous development of the national economy, a large number of old bridges on the trunk highways of the country's provinces can hardly meet the demands of modern transportation and logistics. Some bridges with low original design standards and poor traffic capacity are in urgent need of transformation. However, in some special areas, due to the restriction of natural conditions, the bridge can be rebuilt and strengthened as much as possible to rejuvenate the old bridge if it still has the value of utilization. In the design and reconstruction of the beach bridge, according to the original bridge structure, according to local conditions, prudent decision-making, make full use of its mechanical characteristics, using auxiliary means and technology to enhance the strength of the main beam, strengthening the overall structure to improve the carrying capacity of the bridge, broaden the deck to meet Traffic flow demand, the transformation of the old bridge section of the throat reinforcement, extension of life and utilization were explored.