From unit-length gravity-dam geometry, concrete unit weight, upstream water level and foundation parameters, compute anti-sliding and anti-overturning safety factors under static water pressure.
坝体自重 W = 0.5·ρc·g·H·B
水平水压力 P = 0.5·ρw·g·h²
扬压力 U = 0.5·α·ρw·g·h·B
抗倾力矩 MR = W·(B/3);倾覆力矩 MO = P·(h/3)
安全标准:Ks ≥ 1.05~1.10,Ko ≥ 1.3(基本荷载组合)
| Item | Formula / Note | Source / Standard |
|---|---|---|
| Sliding stability | K = resisting ÷ sliding = [f(ΣW−U) + cA] ÷ ΣP, K≥3.0 for gravity dams | SL 319-2018 Gravity Dam Design Code |
| Uplift pressure | Uplift reduced by grout curtain and drains; triangular distribution without drains | SL 319-2018 uplift clauses |
| Overturning | Resultant must fall within the middle third (no-tension rule) | Gravity-dam profile rule |
| Seismic combination | Seismic K drops to 2.3–2.5 with SL 203 response-spectrum hydrodynamic forces | SL 203-97 Seismic Design of Hydraulic Structures |
大坝稳定性计算器 - 重力坝抗滑稳定与抗倾覆稳定安全系数计算。。科学研究工具,采用标准科学公式,计算精准。
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