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国内公路隧道的結构设计,因没有自己的围岩压力公式,普遍采用铁路隧道经验公式。但公路隧道同铁路隧道相比,在断面的跨度、高跨比等方面有自身的特点,铁路隧道公式也有限定的适用范围。直接使用铁路公式存在许多不足之处,本文结合公路隧道的特点,从铁路隧道施工坍方统计资料回归分析出发,提出一个适合于公路隧道特点的围岩压力公式,供参考。
The structural design of domestic highway tunnels does not generally have the tunnel tunnel experience formula because of its own formula of surrounding rock pressure. However, compared with railway tunnels, highway tunnels have their own characteristics in terms of span span, high-span ratio and so on. Railway tunnel formulas also have a limited scope of application. There are many shortcomings in using the railway formula directly. Based on the characteristics of the highway tunnel, this paper presents a regression analysis of the statistic data of the collapse of the railway tunnel construction, and presents a formula of surrounding rock pressure suitable for the characteristics of the highway tunnel for reference.