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首页> 外文期刊>Bulletin of earthquake engineering >Corrections to mechanical CPT results for use in liquefaction evaluation
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Corrections to mechanical CPT results for use in liquefaction evaluation

机译：对机械CPT的校正结果用于液化评估

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摘要

The cone penetration test is often used in geological and geotechnical surveys for characterising soil layers and to solve a wide set of geotechnical problems, especially for large scale studies that need to cover as wide an area as possible with more cost and time savings. For more than 30 years, there has been considerable interest in using CPT also to evaluate the liquefaction resistance of soils. The CPT-based simplified methods used for liquefaction resistance evaluation require in situ measurements from electrical cone penetrometers even if they are frequently applied using measurements from mechanical CPTs that are still preferred by current engineering practice in many countries. In the present paper, a dataset of more than 3900 pairs of measurements of cone tip resistance and sleeve friction pertaining the same soil levels and measured with the two different types of cone penetration equipment (mechanical and electrical) were obtained from 44 sites located in Northern and Central Italy. Statistical analyses and regression processes allowed for the definition of some correction equations to be included in some of the most used CPT-based methods for liquefaction resistance estimation from CPT mechanical data. A probabilistic approach based on Taylor's method was proposed for determining the uncertainties. Finally, the reliability of the suggested correction procedure was tested on the dataset available for this study.
机译：锥形渗透试验通常用于地质和岩土工程调查，用于表征土壤层，并解决广泛的岩土问题，特别是对于需要覆盖尽可能宽的区域的大规模研究，更具成本和时间节省。 30多年来，使用CPT也有相当兴趣，也可以评估土壤的液化抗性。即使使用来自许多国家的当前工程学实践仍然优选的机械CPTS经常施加，所以用于液化电阻评估的基于CPT的简化方法也需要来自电锥形渗透度计的原位测量。在本文中，从位于北部的44个位点获得了多于相同土壤水平的锥形尖端电阻和套筒摩擦摩擦摩擦摩擦电阻和套筒摩擦和测量的套筒摩擦和旋转摩擦液的数据集。和意大利中部。统计分析和回归过程允许定义一些校正方程，以包括在一些基于CPT的基于CPT的基于CPT的方法中，从CPT机械数据中液化阻抗估计。提出了一种基于泰勒方法的概率方法来确定不确定性。最后，在该研究可用的数据集上测试了建议的校正程序的可靠性。

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