Page 571 - 水土保持手冊_10612
P. 571
49.09 × 35° + 5.05
∴ = = 2.43 > 1.5
16.24
若P 不計則
′
49.09 × 35°
= = 2.12 > 1.5
16.24
(2)傾倒安全係數及基礎壓力：
∆ 88.45
= = = 1.8
∆ 49.09
偏心距
3.6 3.6
= 1.8 − = 0 < = 0.6
2 6
基礎壓力
1 ∑ 6 49.09 6 × 0
= �1 ± � = (1 ± )
2 3.6 3.6
δ &δ 為 13.64&13.64<25t/m
2
1
2
2. B-B 斷面
∑ 60.01
= = = 1.77
∑ 33.87
偏心距
2.8 2.8
= 1.77 − 0.3 − = 0.07 < = 0.7
2 4
3. C-C 斷面
最大應力為
6 6 × 1.37
2
= = = 8.22/
1 × ℎ 2 1 × 1.0 2
= 0.82/ < 4.2/ OK
2
2
ACI 規範規定值為
‘ 2
0.03 = 0.03 × 140 = 4.2/
工-3-13
