Taking Qinling Tunnel as an example and on the premise of survey design,the technical points, concrete requirements and items for attention of horixontal control survey in extra-long tunnel are expounded in this paper Meanwhile,operating principle as well as the usage of IED-260 tunnel guiding system which adapting to TBM construction survey technique are also briefly introduced.

Application of BEAM method prediction of geologic condition system in TBM construction;

Necessity of mid-adits on TBM construction section for super-long tunnel;

Significance of rock debris observation to TBM construction in hard rock;

According to practical experiences,some construction countermeasures are discussed for TBM constructions in bad.

The main seepage of assembly pipe in the TBM construction tunnel happens at the joint of pipes,and the water-expansion rubber is the main waterproof material for the assembly pipe joint in the TBM construction tunnel.

Study on simulation and optimization of tunneling with TBM for long tunnel;