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1.国外胀缝设计动态 国外从40年代开始进行取消(不设)胀缝的试验,结果证明取消胀缝后并不像预想的那样会大量出现拱胀甚至挤碎现象,相反,它对于行车、板与板之间的传荷能力、减少石子等硬杂物嵌入缝隙、减小冲击和振动力以及方便机械化连续快速施工等方面有利而无弊。另外,一定的拱胀还可以抵消荷载对路面的一部分挠曲变形。因此,取消胀缝设计的方法得以广泛推广,至1973年美国已有40个州取消了水泥混凝土路
1. Foreign expansion joint design dynamic Abolition of foreign countries from the 1940s (no) expansion joint test results show that the elimination of the expansion joint after the collapse is not as expected, there will be a lot of bulging or crushing phenomenon, on the contrary, it is driving , The load-carrying capacity between the board and the board, reducing the embedding of hard debris such as gravel, reducing the impact and vibration force, as well as facilitate mechanized continuous rapid construction and so on. In addition, a certain amount of bulging can also offset the load on the road surface deflection. Therefore, the method of canceling the design of the joint was widely popularized. By 1973, 40 states in the United States canceled the cement concrete road