大断面客专隧道在开挖过程中的测量

以客运专线合武三标长岭关铁路隧道在开挖中，采用无棱镜激光测距全站仪，代替先进的断面仪对隧道轮廊进行的测量放样为例，并从内业准备、开挖面放样、断面数据的采集与整理等几个方面进行了较为详细的阐述，该方法取得了较好的经济效果和较高的测量精度，为类似设备拓宽使用范围可提供较好的借鉴。

Excavation Setting-out of Passenger-dedicated Railway Tunnels with Large Cross-sections

During the excavation of Changlingguan tunnel on Hefei - Wuhan passenger-dedicated railway, prism-free laser distance-measuring total stations, instead of sophisticated profilers, are used to set out the profile of the tunnel. In the paper, the setting-out of the tunnel profile by means of prism-free laser distance-measuring total stations is presented in terms of indoor preparation, excavation face setting-out and profile data acquisition and processing. By means of this method, satisfactory economic results and high surveying accuracy are achieved. The paper can provide reference for the enlarging of the application scopes of similar instruments in the future.