圆弧拱是取某圆周的一部分构成巷道拱部的形状，拱形圆滑一致，在巷道周围压力作用下不易产生应力集中，支护结构受力状态好。此断面利用率较高，可减少开挖工程量，施工技术亦较简单，是采用较多的一种断面形式。
圆弧拱巷道围岩稳定性要远大于矩形巷道。
The surrounding rocks of arched roadways are much more stable than that of rectangular roadways.
文中推导出了任意三心拱和圆弧拱巷道断面积计算的公式。
A fornltila for calculating the heading section of arbitrary three-centered arch and circular arch types was derived in this paper.
对圆弧拱面内自由振动的频率和非线性内共振现象进行了研究。
The in-plane free vibration frequencies and nonlinear internal resonance of circular arches were studied.
应用推荐