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=114同一验收批强度平均值mfcu= 33MPa前一检验期强度标准差 σ0=同一验收批强度标准差sfcu=3.12验收批各组试件强度值(Mpa)35.331.532.735.132.331.532.536.831.431.937.431.031.732.137.233.332.233.231.631.232.733.132.231.634.732.833.033.932.731.732.634.132.432.533.0，合格判定系数：λ1=1.6fcu,min=3.6MPa混凝土强度等级养护条件λ2=0.85C30自然养护33.732.531.737.530.831.732.033.631.832.232.932.431.435.635.532.131.933.232.231.632.437.332.332.733.832.832.133.535.531.732.335.431.231.133.737.331.933.133.231.531.534.834.232.632.032.031.731.933.532.832.332.932.532.131.734.930.932.031.432.332.733.432.832.631.831.932.636.831.73.632.833.132.733.831.533.531.531.933.0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=27.63MPa0.9fcu,k=27MPamfcu-λ1sfcu≥0.9fcu,kfcu,min=3.6MPaλ2fcu,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11.76471
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