ABSTRACT
The constructing/constructed Tunnel on the fault and fractured zone are often occured to collapses of tunnel at crown or face cause by underground water flow (inward), effect of blasting vibration and etc. In these cases of tunnel are apply to reinforcement methods for prevent its from collasping.
This paper is the case study of multi-step grouting method using high strength FRP (Fiberglass Reinforced Plastic) pipe as reinforcing members in tunnel on the weak zone such as fault zone and fractured area.
