Based on the Georgia road tunnel slope location optimization

Abstract

In order to maintain the stability of the mountain under the premise of reducing the cost in the tunnel construction, to Georgia highway and tunnel as an example, put forward in the process of excavation of tunnel, in the case of guarantee the stability of the mountain, reduce the excavated volume of the mountain, the mountain slope forward 4 m, and using numerical analysis software MIDAS to two kinds of schemes are numerically simulated, compared to the original plan and put forward solution two kinds of working conditions of the mountain slope ground stress, stress and settlement of slope of tunnel lining first. The numerical simulation results show that after the mountain slope is moved forward, the peak value of ground stress of the mountain decreases, the shear stress of the initial lining decreases, and the slope settlement is basically the same as the original plan. Generally speaking, the settlement value of the vault decreases, and the uplift value of the arch bottom increases by 2mm. Therefore, in future tunnel construction, according to the corresponding geological conditions, the slope can be appropriately moved in front of the mountain to reduce the amount of mountain excavation and save costs.