SPT-CPT相关关系及影响因素分析
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摘要
根据多个实际工程中的标准贯入试验(SPT)和静力触探试验(CPT)数据,确定了SPT-CPT对比孔的选择原则及SPT参数N值和CPT参数锥尖阻力qc值的读取方法。采用统计学方法对N值和qc值形成的散点图进行了拟合分析。分析了土性类别、平均粒径、黏粒含量三个影响因素对SPT-CPT相关关系的影响。结果表明,拟合直线斜率随土颗粒粒径的减小而增大,随小颗粒含量的增大而增大,三个影响因素具有内在统一性。所提出的相关关系可以进一步应用于地基土液化判别等岩土工程问题。
Based on the data of standard penetration test(SPT) and static cone penetration test(CPT) from practical engineering projects,the principle of selection of SPT-CPT compared hole and the reading method of SPT parameter N values and CPT parameters tip resistance qc value is determined.Statistical methods were used for fitting analysis of the scatter data,plot of the N values and qc values.Impacts of three factors,soil category,average particle size,and clay content,on the SPT-CPT correlation were investigated.The results show that the slope of the fitted straight line increased with decreasing of soil particle size and increased with increasing content of small particles.The SPT-CPT relationship can be further applied to soil liquefaction and other geotechnical problems.
Based on the data of standard penetration test(SPT) and static cone penetration test(CPT) from practical engineering projects,the principle of selection of SPT-CPT compared hole and the reading method of SPT parameter N values and CPT parameters tip resistance qc value is determined.Statistical methods were used for fitting analysis of the scatter data,plot of the N values and qc values.Impacts of three factors,soil category,average particle size,and clay content,on the SPT-CPT correlation were investigated.The results show that the slope of the fitted straight line increased with decreasing of soil particle size and increased with increasing content of small particles.The SPT-CPT relationship can be further applied to soil liquefaction and other geotechnical problems.
引文
1杨文卫,岳中琦.世界各地标准贯入试验比较和共同问题.工程勘察,2008;(1):5-15
2于吉求,沈慧珍,等.用静力触探法评价饱和砂土地震液化问题.四川建筑科学研究,1979;(8):
3刘松玉,吴燕开.论我国静力触探技术(CPT)现状与发展.岩土工程学报,2004;26(4):553—556
4孔祥兴.静力触探判别饱和砂性土液化公式的探讨.江苏地质,1993;
5Akca N.Correlation of SPT–CPT data from the United Arab Emir-ates.Engineering Geology,2003;67:219—231
6浙江大学.概率论与数理统计.北京:高等教育出版社,2001:294—319
2于吉求,沈慧珍,等.用静力触探法评价饱和砂土地震液化问题.四川建筑科学研究,1979;(8):
3刘松玉,吴燕开.论我国静力触探技术(CPT)现状与发展.岩土工程学报,2004;26(4):553—556
4孔祥兴.静力触探判别饱和砂性土液化公式的探讨.江苏地质,1993;
5Akca N.Correlation of SPT–CPT data from the United Arab Emir-ates.Engineering Geology,2003;67:219—231
6浙江大学.概率论与数理统计.北京:高等教育出版社,2001:294—319
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