A SIMPLIZED WAY TO CACLULATE DEVIATION OF TUNNEL LINE

This thesis documents a method to calculate deviation of tunnel line. It is based on tunnel line's character to analyse different linestyle, relize a batch of tunnel line's 3-D coordinate quick calculation. This supply a way for definiteness of tunnel line's deviation during shield construction and monitor of centre coordinate excursion after ring plate's assembly. Engineering practices prove this method measure precision can achieve ~mm. It provides highly utility value in field calculation as well as later moniter.