C-TUBE COMBINATION ROCK BOLTS: IMMEDIATE AND LONG TERM REINFORCEMENT OF UNDERGROUND EXCAVATION USING CORROSION PROTECTED GROUTED BOLTS. FULL SCALE STUDY TRIAL RESULTS REGARDING BEHAVIORS AND ADVANTAGES

摘要

The aim of the studies carried on were to find and evaluate the performance of commonly available types of ungrouted and grouted rock bolts subjected to different loading and stress situations and their behavior in corrosive environments. Laboratory and in situ tests have been carried out to determinate the behavior of these fixtures and particularly the performances of the C-TUBE combination rock bolt.