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二滩水电站混凝土双曲拱坝，坝高２４０ｍ，是我国已建和在建的第一高坝。根据拱坝应力状况，仿真试验试件尺寸，二向、三向轴受力状况混凝土的力学变形特性，建立了相应的方程式。二滩拱坝混凝土强度设计龄期为１８０ｄ，抗渗标号不小于Ｓ１２，抗冻标号选用Ｄ２００，胶材用量不超过２００ｋｇ／ｍ３，也不少于１７０ｋｇ／ｍ３，粉煤灰掺量控制在３０％以内，Ａ、Ｂ、Ｃ三区混凝土强度分别采用３５、３０、２５ＭＰａ。经试验和复核，大坝混凝土强度的安全系数是完全足够的。
Ertan hydropower station concrete double-curvature arch dam, dam height 240m, is already built and under construction in our country the first high dam. According to the stress status of the arch dam, the mechanical deformation characteristics of the test specimen, the mechanical deformation characteristics of the two-way and the three-axis axial force test conditions, the corresponding equations are established. Ertan arch dam concrete strength design age of 180d, impermeability label is not less than S12, antifreeze label selection D200, glue content does not exceed 200kg / m3, nor less than 170kg / m3, fly ash dosage control in 30 %, A, B, C three districts were used concrete strength 35,30,25 MPa. After testing and reviewing, the safety factor of dam concrete strength is completely adequate.