Table 7: Point safety factor of abutments.

EL (m)Generalized least squaresD-ACO
Left abutmentRight abutmentLeft abutmentRight abutment

21853.0 (gravity pier), 1.5~2.0 (out of gravity pier)22.0~3.0 (gravity pier); 1.1~1.5 (out of gravity pier)2.0

21481.5~3, 1.2~1.5 (fault)2~31.5~3.0; 1.0~1.5 (fault)1.5~2.0

21002~32, 1.2~1.5 (fault)1.5~3.01.5~2.0; 1.2~1.5 (fault)

20502~3, 1.2~1.5 (fault)22.0~3.0; 1.1~1.5 (fault)1.5~2.0

2030 2~31.5~3.01.5~5.0