Table 2:
Safety factors for the three methods of the strength reduction method.
Safety factors [-]
Slope angle[°]
Method 1
Method 2
Method 3
25
1.720 (100 %)
1.724 (+ 0.2 %)
1.654 (‒ 3.8 %)
20
2.130 (100 %)
2.128 (‒ 0.1 %)
2.047 (‒ 3.9 %)
15
2.700 (100 %)
2.778 (+ 3.9 %)
2.694 (‒ 0.2 %)