某一级公路水泥稳定碎石基层，已知Rd=3.2MPa，现测得某段的无侧限抗压强度数值如下：3.91、4.16、3.48、3.86、3.62、3.95、3.82、3.56、3.76、3.58、3.68、4.02（单位：MPa）。请你对该段的强度结果进行评定并计算其得分值（保证率为95%）。
参考答案：
(1)计算平均值[*]、标准偏差S、变异系数Cv
[*]=3.78(MPa)
S=0.21(MPa)
Cv=5.46%
(2)计算Rd/(1-ZaCv)
Rd/(1-ZaCv)=3.2/(1-1.645×0.0546)=3.52(MPa)
(3)判定是否符合设计强度
[*]=3.78(MPa)＞Rd/(1-ZaCv)=3.52(MPa)
试件平均强度满足要求。
(4)计算得分值
偏差系数Cv=0.21/3.78=5.46%＜10%，
得分值=100分(规定满分)。
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