基于CPTu和SPT原位测试的地震液化敏感性分析对比
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Comparative analysis of seismic liquefaction sensitivity based on in-situ CPTu and SPT
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    摘要:

    地震液化敏感性通常用抗液化安全系数(FSliq)表示,其计算强烈依赖于原位测试技术。针对国内外砂土液化判别方法的差异性,依托国外集装箱码头项目,采用国内外两种原位测试技术SPT、CPTu,对两个场地地震液化敏感性进行对比分析。结果表明:1)两种方法获取了一致的分析结果,但总体上CPTu分析结果更偏于保守;2)CPTu能够揭示更详细的土体特征,但FSliq计算结果可变性更大。3)验证了我国SPT方法的适用性与准确性。

    Abstract:

    Seismic liquefaction sensitivity is usually denoted by the ant-liquefaction safety factor(FSliq),and its calculation strongly depends on the in-situ test technology. Given the different methods of sand liquefaction discrimination at home and abroad,this paper,relying on an overseas container terminal project,compares the seismic liquefaction sensitivity of two sites with two in-situ test technologies,i.e.,standard penetration test(SPT)and cone penetration test with pore pressure measurement(CPTu),employed respectively at home and abroad. The following observations can be made from the results:1)The two methods produce consistent analysis results,although those obtained by CPTu are more conservative on the whole. 2)CPTu can reveal more detailed soil characteristics,despite that corresponding FSliq calculated are more variable. 3)The applicability and accuracy of the SPT method are verified.

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张衍林,石章入,丛 璐,等.基于CPTu和SPT原位测试的地震液化敏感性分析对比[J].水运工程,2022(5):198-204.

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  • 在线发布日期: 2022-05-05
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