그라우팅 및 강관다단 병용공법의 설계기법에 관한 연구

초록

Grouting and Umbrella Arch Method (UAM), among others, are commonly applied to increase the facial stability during tunnel excavation and, according to field condition, both methods may be used simultaneously. Th design approaches of the above mentioned techniques are well estabilished in some cases, but the design tool for the simultaneous reinforcement is not properly estabilshed so far. In this study, the consititutive relationship involving grouted rock and UAM is derived from the mechanics of composite material, and the small scale experiments on the tunnel reinforcement are performed as well. The results are compared with the numerical predictions, and it is showd that the numeriacal analysis employing the proposed model is in good agreement with the experimental data available.