Abstract
Nationally, tunnel and underground constructions are necessary for the environmental sustainability and the efficient use of land space. For the importance of eco-friendly circumstances, 2-arch or large road tunnel has been designed so far. However, such a 2-arch or large tunnel has problems in terms of cost, constructability, construction period, and maintenance. Therefore, in this study, tunnel behavior and stability of rock pillar according to the pillar width and cover depth for parallel tunnels are investigated by performing FE analysis and using empirical formula. According to the results, Rock pillar is reinforced for distributed vertical load by Tie-Bolt due to unpredicted ground deformation, and the reinforced rock pillar’s behaviour from the FE analysis shows a quite good agreement with field measurement. According to ground conditions, if the pillar width of the parallel tunnels is reduced, it can be more efficient in use of the tunnel space compared to previous tunnels.
| Translated title of the contribution | Assessment of minimum pillar width and reinforcement of parallel tunnel using numerical analysis and field monitoring |
|---|---|
| Original language | Korean |
| Pages (from-to) | 299-310 |
| Number of pages | 12 |
| Journal | 한국터널지하공간학회 논문집 |
| Volume | 16 |
| Issue number | 3 |
| DOIs | |
| State | Published - Jun 2014 |