万家寨引黄北干线超长隧洞TBM施工隧洞贯通测量误差分析与对策

TBM掘进与钻爆法开挖施工工艺明显不同,主要表现在TBM掘进机一次完成开挖与衬砌,前端无测量空间。因此,TBM掘进线路测量关键是控制轴线不发生横、竖向偏移。山西省万家寨引黄工程北干线1号隧洞采用TBM施工,文中将对北干线1号隧洞TBM施工贯通测量误差进行分析,并介绍消除误差的措施。

Error Analysis on Through Survey of Ultra-Long Tunnel Constructed by TBM in North Main Line of Wanjiazhai YRDP and Countermeasures

Compared with the technique of drill blast tunneling method,the construction technique of TBM method has evident difference.The main points are the excavation and lining of tunnel are completed at once and there is no space in front of TBM for survey.Therefore,the survey key of excavation line is to control horizontal and vertical deviations of tunnel axis.The No.1 tunnel of North Main Line of Wanjiazhai YRDP is constructed by TBM.The paper introduces the error analysis on through survey of this tunnel,and explains the measures to eliminate the error.