This paper introduces the theory and its application of the curvilinear guided survey methods in concealed excavation of tunnels, such as chord offset method and tangent offset method.

介绍暗挖隧道曲线导向测量方法——弦线支距法和切弦线支距法的原理及应用。

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There are many methods to measure the circular curved line in circuitry construction survey. Angle offset method and tangent offset method are usually used.

在线路施工测量中，圆曲线测设方法有很多，通常采用偏角法或切线支距法。

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