Research Article
Determination of the Installation Time of Secondary Liner during Excavation of Large Cross-Section Double-Arch Tunnels
Table 5
Safety factor of controlling points of initial support of different plans.
| Plan | Internal force | Controlling points | | | | | | |
| Plan 1 | N | −746.6 | −652.0 | −599.3 | −475.1 | −662.0 | −792.0 | M | −8.0 | −128.7 | −45.4 | −107.6 | −160.8 | 37.0 | K | 3.2 | 1.3 | 2.7 | 1.5 | 1.0 | 2.4 | Plan 2 | N | −802.1 | −588.3 | −573.4 | −420.4 | −595.1 | −840.5 | M | −10.4 | −137.1 | −52.5 | −122.7 | −176.8 | 40.1 | K | 2.9 | 1.2 | 2.5 | 1.3 | 0.9 | 2.3 | Plan 3 | N | −644.4 | −604.7 | −542.1 | −431.1 | −580.1 | −698.8 | M | −6.2 | −110.2 | −37.0 | −87.8 | −132.1 | 30.5 | K | 3.7 | 1.5 | 3.1 | 1.9 | 1.2 | 2.8 | Plan 4 | N | −700.7 | −541.2 | −514.0 | −374.9 | −512.7 | −749.0 | M | −8.3 | −118.6 | −44.3 | −103.0 | −148.5 | 33.8 | K | 3.3 | 1.4 | 2.9 | 1.6 | 1.1 | 2.6 |
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N : axial force, kN; M : bending moment, kN·m; and K : safety factor.
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