Based o n the fi rstha nd informa tions o btained from autho r 's investiga tio n in situ and the info rmatio ns collected from o ther regio ns, the a nalyses and the compari sons betw een these info rmatio ns are put fo rw ard. The evo lutio n o f the st ructural st ress field i s a naly zed qualitativ ely. And the amount o f g round st ress a nd it s ef fect on tunnel co nst ructio n are decided preliminari ly.