A laboratory-based study correlating cone penetration test resistance to the physical parameters of uncemented sand mixtures and granular soils
A laboratory-based study correlating cone penetration test resistance to the physical parameters of uncemented sand mixtures and granular soils
复制标题
一项基于实验室的研究，将圆锥贯入试验阻力与非水泥砂混合物和粒状土壤的物理参数相关联
DOI：
10.1016/j.enggeo.2019.04.015
复制
发表时间：
2019
影响因子：
7.4
通讯作者：
M. Karray
中科院分区：
文献类型：
--
作者：
Michael Ghali;M. Chekired;M. Karray
研究了级配曲线性质和颗粒形状对不同相对密度下正常固结净砂静力触探阻力的影响。建议的经验关系式开发的实验室CPT使用轴对称场模拟器的实验结果的基础上。对18种不同级配的扰动和预混的干净砂和25种不同级配的完全球形玻璃珠进行了试验。利用激光扫描和图像分析技术，得到了试验砂的级配曲线和颗粒形状。对于一个恒定的相对密度，它被证明，而锥贯入尖端阻力和套筒摩擦略有正相关的平均晶粒尺寸，它们显着正相关的均匀性系数和负相关的颗粒的二维棱角。比较了目前提出的经验公式与常用的相对密度经验公式的行为趋势。建议的关系的适用性和局限性进行了验证，从文献中的一个大的数据集，并在加拿大的两个网站的高精度的现场数据。
The influences of gradation curve properties and particle shape on the cone penetration test (CPT) resistances of normally consolidated clean sand under different relative densities were studied. The proposed empirical correlations were developed based on the experimental results of a laboratory CPT using an axisymmetric field simulator. The tests were performed on 18 different gradations of disturbed and premixed clean sands and 25 different gradations of fully spherical glass beads. The gradation curves and particle shapes of the tested sands were developed using laser scanning and image analyses. For a constant relative density, it was demonstrated that while the cone penetration tip resistance and the sleeve friction were slightly positively related to the mean grain size, they were significantly positively related to the uniformity coefficient and negatively related to the two-dimensional angularity of particles. A comparison between the trend in behavior of the current proposed empirical formulas with the frequently used empirical equations formulated in terms of relative density was presented. The applicability and limitations of the proposed relations were verified on a large dataset from the literature and on highly accurate field data of two sites in Canada.