Page 574 - 水土保持手冊_10612
P. 574
1
2
=
2
1
2
= × 0.487 × 1.8 × 8.26 = 29.90 /
2
= 29.90 × 0.5195 = 15.53 /
= 29.90 × 0.8545 = 25.55 /
1 2
=
2
1
2
= × 0.487 × 1.8 × 7.06 = 21.85 /
2
= 21.85 × 0.5195 = 11.35 /
= 21.85 × 0.8545 = 18.67 /
檢討：
A-A 斷面
滑動安全因數
′
∑ tan ∮ +
=
∑
1 1 + sin ∮ 1 1 + sin 35°
′
2
∵ = ℎ 2 = × 1.9 × 1.5 ×
2 1 − sin ∮ 2 1 − sin 35°
1 1 + 0.5736
= × 1.9 × 2.25 × = 7.89 /
2 1 − 0.5736
52.03 × 35° + 7.89
∴ = = 1.85 > 1.5 .
23.97
若 不計，則
′
52.03 × 35°
= = 1.52 > 1.5 .
23.97
傾倒安全因數及基礎壓力
∑ 139.14
= = = 2.28
∑ 60.91
工-3-16
