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混凝土结构逐段顶推法是在二十世纪六十年代初期开始发展的。自那时以来,这种方法已经推广到全世界。用这种方法建造的桥梁是在桥台后面紧靠桥梁前一节段的固定式模板内分段进行浇注。然后将整个上部结构纵向向前顶推,以便在固定式模板内为下一节段让出位置。这种方法综合了预制和现浇方法的优点,提高了混凝土质量,降低了成本。顶推桥梁的显著成就有这样一些数据:最长的连续上部结构为3809英尺(1161米);竣工阶段的最大跨径为551英尺(168米);当顶面设有辅助拉索进行顶推时其最大跨径为436英尺(133米),强曲率的平面曲线桥的桥跨结构,其半径为492英尺(150米)。逐段顶推法同样地在一些建筑物上得到了应用,例如横跨铁路的建筑物。还有一种将该方法用来修建水下隧道的新趋向。顶推方法的主要节省额是靠劳力和设备费用的降低来实现的。
The concrete structure push-by-paragraph method was developed in the early 1960s. Since then, this method has been extended to the world. Bridges constructed in this way are cast in sections within the fixed formwork immediately after the abutment abutting the previous section of the bridge. The entire superstructure is then jacked longitudinally forward to give up the position for the next segment within the stationary template. This method combines the advantages of precast and cast-in-place methods, improves the quality of concrete and reduces costs. Some of the notable achievements of a pusher bridge are the following: 3809 feet (1161 meters) for the longest continuous superstructure; 551 feet (168 meters) for the as-built stage; with auxiliary cables for jacking on the top When its maximum span is 436 feet (133 meters), a curved bridge of strong curvature is spanned 492 feet (150 meters) wide. The piece-by-piece push-up is likewise applied to buildings such as buildings across the railroad. There is also a new tendency to use this method to build underwater tunnels. The main savings of the push method are achieved through the reduction of labor and equipment costs.