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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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