确保超长隧洞高精度贯通所采取的措施和方法

Measures and Methods for Ensuring High Accuracy Penetration of Ultra Long Tunnel

隧洞导线测量和普通地面导线测量的区别在于,隧洞导线测量不能和普通地面导线测量一样对导线点一次性先进行符合测量。隧洞测量由于是地下工程,只能边掘进边布点,以支导线的形式进行测量,没有检核条件。随着隧洞的延伸,导线误差将越来越大,为了保证隧洞的正确贯通,需要采取不同于地面测量的特殊方法,由高精度的施工测量来保证,否则超长隧洞高精度贯通将无从谈起。

The difference between tunnel traverse measurement and ordinary ground traverse measurement is that,tunnel traverse measurement cannot make one time coincidence measurement to the traverse points.Due to tunnel measurement belongs to underground works,stationing can only be done along with tunneling,and measurement is carried out in the form of branch traverse without any checking conditions.With the further extension of tunnel,the traverse error will become larger and larger,in order to ensure correct penetration of the tunnel,special method should be taken to ensure high accuracy survey,or high precision penetration of ultra-long tunnel will be impossible.