Stability Calculation Method of Slope Reinforced by Prestressed Anchor in Process of Excavation

Table 3

Anchor tension of slope excavation stages.

Excavation phase	Anchor tension of 1 layer (kN)	Anchor tension of 2 layer (kN)	Anchor tension of 3 layer (kN)	Anchor tension of 4 layer (kN)	Anchor tension of 5 layer (kN)	Security coefficient	Security coefficient
I	23.75					1.3136	1.6848
II	79.17	79.17				1.344	1.6456
III	71.25	142.50	106.88			1.3222	1.5981
IV	95.00	190.00	142.5	190		1.3424	1.45
V	79.17	158.33	237.5	158.33	197.92	1.3684	1.4209