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1 前 言 当前,梁(板)式简支架桥,一般采用桥面简易连续,组成多孔连在一起的结构形式。一联的孔数随跨径的大小,少则5～10孔,多则20～30孔。例如我省淮滨淮河公路大桥是由12孔40m跨径一联和39孔16m跨径一联等两联组成;开封黄河公路大桥分别由10孔、9孔、8孔50m跨径一联的数联组成;国道107线上的卫共大桥由13孔20m跨径一联和9孔30m跨径一联组成等等。并且每联的长度有越来越大的趋势,以适应当前公路运输的平稳、舒适、高速、安全可靠诸因素的要求。
1 Preface At present, beam (plate) type simply supported bridge, the general use of simple and continuous deck, composed of porous structure connected together. A joint with the number of holes the size of the span, ranging from 5 to 10 holes, as many as 20 to 30 holes. For example, Huai Bin Huaihe Road Bridge in our province consists of 12 holes 40m span a joint and 39 holes 16m span a couple such as two together; Kaifeng Yellow River Highway Bridge by the 10 holes, 9 holes, 8 holes 50m span a joint Composed of a number of links; State Road 107 on the bridge by a total of 13 holes 20m span a joint and 9 holes 30m span a combination and so on. And the length of each link has an increasing trend to adapt to the current requirements of smooth, comfortable, high-speed, safe and reliable road transportation.