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一、绪言解放以来,特别是在三年大跃进中,铁路桥实体桥墩的设计有了迅速的发展。在初期由于桥墩墩颈尺寸受顶帽的控制,在很大程度上影响到墩身结构,因而设计出来的桥墩一般都比较笨重粗大。强度和刚度往往是不成问题的,在设计时只要检算一下墩身的偏心(稳定)就能满足要求了。其后为了节约圬工,探求经济合理的桥墩形式,提出了各种新的先进技术和各种新的设计方法。例如托盘桥墩的运用,大大地解放了墩颈尺寸的限制,以及对桥墩合理边坡的探讨与运算等,使桥墩逐渐
I. INTRODUCTION Since the liberation of the introduction, especially during the Great Leap Forward in the past three years, the design of railway bridge piers has been rapidly developed. In the early days due to the piers pier size control by the cap, to a large extent affect the pier body structure, so the design of the piers are generally more bulky. Strength and stiffness are often not a problem, as long as the design of the eccentric body pier (stability) will be able to meet the requirements. Later, in order to save labor, to explore the economic and reasonable piers form, put forward a variety of new advanced technologies and various new design methods. For example, the use of pallet piers greatly liberated the restrictions on the size of the piers and the discussion and calculation of the reasonable slope of piers so that the piers gradually