如题：某高速公路水泥稳定碎石基层，已知设计抗压强度Rd=3.1MPa,现测得某段的无侧限抗压强度数值如下，对该段强度结果进行评定并计算其得分值。（规定分为20分，保证率为95%，Za=1.645）3.85äÅä^$/ W~bbs.3c3t.com¸ËAG¨äwî]
4.01äÅä^$/ W~bbs.3c3t.com¸ËAG¨äwî]
3.53äÅä^$/ W~bbs.3c3t.com¸ËAG¨äwî]
3.96äÅä^$/ W~bbs.3c3t.com¸ËAG¨äwî]
4.00äÅä^$/ W~bbs.3c3t.com¸ËAG¨äwî]
3.73äÅä^$/ W~bbs.3c3t.com¸ËAG¨äwî]
3.86äÅä^$/ W~bbs.3c3t.com¸ËAG¨äwî]
3.97äÅä^$/ W~bbs.3c3t.com¸ËAG¨äwî]
3.93äÅä^$/ W~bbs.3c3t.com¸ËAG¨äwî]
4.05äÅä^$/ W~bbs.3c3t.com¸ËAG¨äwî]
3.52äÅä^$/ W~bbs.3c3t.com¸ËAG¨äwî]
3.83äÅä^$/ W~bbs.3c3t.com¸ËAG¨äwî]
第一种解答：äÅä^$/ W~bbs.3c3t.com¸ËAG¨äwî]
äÅä^$/ W~bbs.3c3t.com¸ËAG¨äwî]
R=3.85äÅä^$/ W~bbs.3c3t.com¸ËAG¨äwî]
Cv=0.046äÅä^$/ W~bbs.3c3t.com¸ËAG¨äwî]
äÅä^$/ W~bbs.3c3t.com¸ËAG¨äwî]
Rd/(1-ZaCv)=3.1/(1-1.645*0.046)=3.35äÅä^$/ W~bbs.3c3t.com¸ËAG¨äwî]
äÅä^$/ W~bbs.3c3t.com¸ËAG¨äwî]
äÅä^$/ W~bbs.3c3t.com¸ËAG¨äwî]
R>Rd/(1-ZaCv)äÅä^$/ W~bbs.3c3t.com¸ËAG¨äwî]
äÅä^$/ W~bbs.3c3t.com¸ËAG¨äwî]
合格，得满分20分。äÅä^$/ W~bbs.3c3t.com¸ËAG¨äwî]
äÅä^$/ W~bbs.3c3t.com¸ËAG¨äwî]
我看了也有资料上这样解答： äÅä^$/ W~bbs.3c3t.com¸ËAG¨äwî]
答案：äÅä^$/ W~bbs.3c3t.com¸ËAG¨äwî]
（1）计算平均值äÅä^$/ W~bbs.3c3t.com¸ËAG¨äwî]
，标准偏差S、变异系数Cv：R=3.85äÅä^$/ W~bbs.3c3t.com¸ËAG¨äwî]
Cv=0.046 S=0.178äÅä^$/ W~bbs.3c3t.com¸ËAG¨äwî]
（2）计算代表值：äÅä^$/ W~bbs.3c3t.com¸ËAG¨äwî]
保证率为95%的保证率系数Za=1.645äÅä^$/ W~bbs.3c3t.com¸ËAG¨äwî]
∴代表值=3.85-0.178*1.645=3.56äÅä^$/ W~bbs.3c3t.com¸ËAG¨äwî]
（3）评定：äÅä^$/ W~bbs.3c3t.com¸ËAG¨äwî]
∵3.56＞3.2äÅä^$/ W~bbs.3c3t.com¸ËAG¨äwî]
∴该段的无侧限抗压强度合格äÅä^$/ W~bbs.3c3t.com¸ËAG¨äwî]
（4）计算得分值：äÅä^$/ W~bbs.3c3t.com¸ËAG¨äwî]
得分值=20分（规定的满分）äÅä^$/ W~bbs.3c3t.com¸ËAG¨äwî]
äÅä^$/ W~bbs.3c3t.com¸ËAG¨äwî]
äÅä^$/ W~bbs.3c3t.com¸ËAG¨äwî]
个人认为第二种解答求出的是该组数据的代表值，不适用于路段的强度评定，不知大家有何不同见解，欢迎讨论！äÅä^$/ W~bbs.3c3t.com¸ËAG¨äwî]
äÅä^$/ W~bbs.3c3t.com¸ËAG¨äwî]
äÅä^$/ W~bbs.3c3t.com¸ËAG¨äwî]
äÅä^$/ W~bbs.3c3t.com¸ËAG¨äwî]
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