| Title |
Comparison of Ground Movements in A Single Ground Layer and Multiple Ground Layers due to Nearby Tunnel Excavation |
| Keywords |
tunnel;numerical analysis;ground layer condition;ground loss;settlement;horizontal displacement;터널;수치해석;지층조건;지반손실;침하;수평변위 |
| Abstract |
In this study, numerical analysis has been performed to compare the ground movements in a single ground layer and multiple ground layers due to nearby tunnel excavation. The numerical analysis has been conducted in the different ground layer conditions considering different construction conditions (volume loss at excavation face), and the results of the maximum surface settlement and horizontal displacement have been compared considering the ground layer and construction conditions. In addition, the maximum surface settlement from the numerical analysis has been compared with the maximum settlement at tunnel crown considering the ground layer and construction conditions, and the maximum surface settlement has been also compared with the maximum horizontal displacement with the ground layer conditions. Besides, the volume loss(V<SUB>L</SUB>) at tunnel excavation face has been compared with the total surface settlement volume(V<SUB>s</SUB>) with the variation of ground layer condition. The results from the numerical analysis have been compared with field measurements and by this comparison it is believed that the numerical results in this study can be utilized practically in analyzing the nearby ground behavior in different ground layer and construction conditions due to tunnel excavation. |