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泰来
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- 2012-06-04
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发表于 2012-06-04 13:33
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★工程质量等级评定例题.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n1、某土方路基质量评定，经对压实度、弯沉、平整度等8项指标检测，各指标合格率如表所示，其中压实度代表值大于压实度标准值，弯沉代表值满足要求。外观缺陷和资料不全扣分分别为8分和6分。.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n检查项目.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n | 压实度.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n | 弯沉.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n | 纵断高程.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n | 中线偏位.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n | 宽度.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n | 平整度.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n | 横坡.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n | 边坡.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n | 合格率（%）.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n | 90.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n | 100.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n | 75.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n | 90.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n | 85.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n | 75.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n | 90.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n | 80.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n | 权 值.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n | 3.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n | 3.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n | 2.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n | 2.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n | 2.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n | 2.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n | 1.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n | 1.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n |
.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n（1）请评定该路段土方路基质量等级。.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n（2）如评定结果不合格，那么如何改进该土方路基的质量？如评定结果合格，为了进一步提高该土方路基的质量，则应采取什么措施。.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n解：（1）检测项目得分分别为：91、100、75、90、85、75、90、80.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n土方路基分项工程得分：（90×3＋100×3＋75×2＋90×2+85×2+75×2+90×1+80×1）/（3+3+2+2+2+2+1+1）=86.9分.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n土方路基分项工程评分值＝86.9-8-6=72.9(分)，小于75分.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n小于75分，故质量等级评定为不合格。.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n（2）改进措施：提高检查项目的合格率，纵观检测项目的合格率和规定分，首先应提高压实质量，进行补充压实，使压实度合格率提高。其次提高平整度合格率；补充质量保证资料，减少扣分；整修外观缺陷，减少扣分。.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n★路基、路面压实度评定例题.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n2．某二级公路路基压实质量检验，经检测各点（共12个测点）的干密度分别为1.72、1.69、1.71、1.76、1.78、1.76、1.68、1.75、1.74、1.73、1.73、1.70(g/cm3)，最大干密度为1.82g/cm3，试按95%的保证率评定该路段的压实质量是否满足要求（压实度标准为93%）。.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n附 表.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n保证率.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n | .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n | 保证率系数Za.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n | n=10.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n | n=11.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n | n=12.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n | 99%.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n | 0.892.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n | 0.833.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n | 0.785.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n | 2.327.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n | 95%.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n | 0.580.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n | 0.546.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n | 0.518.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n | 1.645.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n | 90%.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n | 0.437.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n | 0.414.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n | 0.393.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n | 1.282.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n | 97.72%.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n | 0.814.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n | 0.761.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n | 0.718.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n | 2.00.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n | 93.32%.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n | 0.537.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n | 0.506.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n | 0.481.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n | 1.50.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n |
.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n解：（1）计算各测点的压实度Ki（%）分别为：94.5、92.9、94.0、96.7、97.8、96.7、92.3、96.2、95.6、95.1、 95.1、93.4.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n（2）计算平均值 和标准偏差S .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n
=95.0%.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n
S=1.68%.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n（3）计算代表值，当95%保证率n=12时，查表得： .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5nK= - ·S=95.0-0.518×1.68=94.1%.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n（4）评定K0=93%.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n
因K>K0.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n
且Ki min=92.3%>88%（极值标准）所以该评定路段的压实质量满足要求。.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n★路面结构层厚度评定例题.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n3．某高速公路二灰稳定砂砾基层设计厚度为18cm，代表值允许偏差为-8mm，极值允许偏差为-15mm。评定路段厚度检测结果（12个测点）分别为17.5、17.7、18.2、18.6、18.1、18.8、、17.6、17.8、19.1、19.3、17.4、17.9cm，试按保证率99%评定该路段的厚度是否合格？并计算合格率.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n附 表.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n保证率.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n | .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n | 保证率系数Za.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n | n=10.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n | n=11.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n | n=12.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n | 99%.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n | 0.892.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n | 0.833.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n | 0.785.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n | 2.327.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n | 95%.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n | 0.580.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n | 0.546.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n | 0.518.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n | 1.645.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n | 90%.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n | 0.437.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n | 0.414.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n | 0.393.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n | 1.282.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n | 97.72%.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n | 0.814.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n | 0.761.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n | 0.718.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n | 2.00.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n | 93.32%.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n | 0.537.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n | 0.506.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n | 0.481.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n | 1.50.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n |
.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n解：（1）厚度平均值.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n=（17.5+17.7+18.2+18.6+18.1+18.8+17.6+17.8+19.1+19.3+17.4+17.9）/12=18.17cm.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n（2）标准偏差S=0.64cm，查表得： =0.785.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n（3）厚度代表值 = .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n（4）该路段厚度代表值符合要求。.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n（5）由于各检测值Xi>18-0.8=17.2cm故合格率为100%.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n★路基、柔性基层、沥青路面弯沉值评定例题.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n4、某检测组对某一已完工的路基进行弯沉测试，共测得２７个弯沉值，其数据如下：60、52、104、110、90、156、224、70、140、130、70、 100、210、104、170、80、86、74、54、60、104、70、218、100、110、50、40 (0.01mm)，请计算该路段的弯沉代表值。（采用２S法，取Za=2.0）。.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n解：（1）将上述27个数据计算得： =105（0.01mm），S=51.6(0.01mm)，CV=49.1%.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n采用2S法，将超出 ±2S范围的作为特异值，即凡大于 + 2S=208的观测值舍弃，有三个：224，210，218。.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n（2）重新计算其余24个观测值得： =91，S=34，CV=37.4%.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n采用2S法，将超出 ±2S范围的作为特异值即凡大于 + 2S=129的观测值舍弃，又有三个：170，156，140。.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n（3）重新计算其余21个观测值得： =82(0.01mm)，S=24.5(0.01mm)，CV=29.9%，无特异值。‘’ .ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n（4）计算弯沉代表值: Lr+2S=82+2×24.5=122(0.01mm)。.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n★水泥混凝土抗压强度评定例题.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n5、某桥基础所需混凝强度等级为C20，施工过程中制取的3组混凝土立方体试件28天抗压强度如下表所示，试评定该混凝土强度等级是否合格。.ê JÅøßÄâbbs.3c3t.com,ÊJ®$ò.5n
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