桥梁水文计算书A4.pdf
- 南宫千树个人认证 |
- 2021-10-28 发布|
- 4.87 MB|
- 10页
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3 1 3.1 . . . . . . . . . . . . . . . . . . . . . . . . . . 2 3.2 . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3.3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4 QP 6
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1 :1/25 K0+020 , 1:
2 1. JTGC30-2015 2. 3. 4. 5. 6.
3 • 1 1 • 2 • 3
3.1 Qp = Ψ(h − z)1.5F 0.8βγδ 2 F (km ) 3 QP p (m /s) Ψ F h (mm) Z (mm) β γ δ i F 4 P111 4-8 : i = 23‰ 4 P111 4-8 Ψ = 0.1 h 4 P115 4-11 4 P109 4-7 11 4 P111 4-9a III 1 50000 2 2: F = 3.787km2 4 P115 4-10 τ = 30min 4P117 4-11 : h = 32mm 4 P119 4-12 : Z = 5mm 4 P120 4-13 β = 1 L0 = 2.1km 4 P120 4-14 γ = 1 3 B0 = 3.4km 4 P121 4-15 δ = 1.00 f f = 0km2 f /F = 0% 25 1.5 0.8 3 Q4% = Ψ(h − z) F βγδ = 40.708m /s
3.2 Qp = 0.287 (Sp − µ) F τn Q p p SP (mm/h) τ µ (mm/h) n 2 F (km ) L (km) 1 50000