工程名称：结构部位钻孔灌注桩配合比编号MM-JC050121-01验收组数n=121同一验收批强度平均值mfcu= 40MPa前一检验期强度标准差 σ0=同一验收批强度标准差sfcu=验收批各组试件强度值(Mpa)44.639.139.639.94040.240.240.538.840.440.339.540.240.340.839.644.440.440.440.340.340.140.138.638.440.639.839.840.64139.239.440.240.34039.341.2，合格判定系数：λ1=0.95fcu,min=混凝土强度等级养护条件λ2=0.85C30自然养护40.141.540.438.54240.540.639.637.340.63941.540.838.440.13740.540.239.639.438.84139.940.240.139.541.938.441.340.440.339.340.642.739.341.939.740.439.939.639.840.140.740.440.739.539.142.439.739.640.339.739.339.439.739.139.739.940.54041.539.138.440.440.440.639.739.141.239.639.540.240.340.138.740.440.439.440.540.340.240.340.640.6统 计 方 法标准差已知统计方法 mfcu≥fcu,k±0.7σ0 fcu,min≥fcu,k-0.7σ0 当强度等级≤C20时 fcu,min≥0.85fcu,k 当强度等级＞C20时 fcu,min≥0.90fcu,k非统计方法标准差未知统计方法mfcu-λ1sfcu=40.11MPa0.9fcu,k=27MPamfcu-λ1sfcu≥0.9fcu,kfcu,min=0MPaλ2fcu,k=25.5MPafcu,min≥λ2fcu,k结论：合格mfcu≥1.15fcu,kfcu,min≥0.95fcu,k依据标准： 《混凝土检验评定标准》GBJ107－87参加人员监理(建设)单位总承包单位施工单位项目技术负责人 质检员统计 年 月 日 年 月 日688.9675.2685.6675.6681.2689676.780.14852.3
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