隧道控制测量中竖井定向方法

Shaft Directional Methods in Tunnel Control Surveying

结合隧道建筑中经常用开挖竖井增加工作面的实际情况,介绍了隧道控制测量中竖井定向常用的两种方法以及应注意的问题。

This article introduces two common -use methods and noticeable problems of the vertical shaft directions in the tunnel control sur veying in the light of the practical conditions that the vertical shaft is usually excavated to increase the working su rface in the tunnel construction.