Abstract:

On basis of the survey practice in TianHua shieldbored running tunnel on line 3 of Guangzhou Metro, the author presents the survey works in the construction of the shieldbored Metro tunnels, analyzes on the influence of the traverse survey accuracy on the holingthrough accuracy and recommends some countermeasures to improve the holingthrough accuracy.

Key words: shieldbored tunnel  , holingthrough accuracy  , survey deviation  , traverse survey adjustment