Study on Section Selection of Super Large Oil Storage Tunnel Based on Strength Reduction Method

To study the section selection of super large oil storage tunnel could help make full use of underground space and arrange tunnels reasonably. The stability of tunnel with three different section (horseshoe section, circular section, elliptic arch section) was studied using the strength reduction method by finite difference element software. The FoS evolution with depth was discussed and the limiting failure state of tunnel were observed with the depth. The results indicated that the stability of different section are basically the same, because of the surrounding rock conditions are good. Cost and space utilization can be the main factors in the section selection.