Quantitative estimation of mechanical characteristics of soils and determination of their behavior using in-situ experiments have always been one of the main concerns of geotechnical engineers. So far, various methods have been introduced to achieve this goal, among which the Dynamic Cone Penetrometer (DCP) test has become more popular as one of the most accurate and efficient methods. Therefore, in this study, an attempt was made to examine the correlation between different soil parameters by performing DCP test along with a series of conventional tests including Unconfined Compressive Strength (UCS) and California Bearing Ratio (CBR) tests on marl soil samples containing 2, 5, 8% lime at 1, 7 and 15 curing days. Furthermore, since the subgrade reaction coefficient (K) is needed in the design of pavements and their underlying materials, Plate Load Test (PLT) was performed to determine K. The results showed that the addition of lime up to 5% increased UCS, CBR and K and decreased dynamic penetrometer index (DPI) of marl soil samples. Further addition of lime had a negative effect on the mechanical characteristics of the samples. Moreover, using the equations obtained from the correlations in this study, strength characteristics and subgrade reaction coefficient of the stabilized marl soil can be estimated by knowing the DPI of the samples. The results of this study showed that the use of the DCP test as a cheap and easy-to-use method can provide a comprehensive view of soil behavior in civil engineering projects with an acceptable coefficient of determination to geotechnical engineers.

中文翻译：

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应用动态锥入度计试验测定石灰处理泥灰土的岩土特性


通过现场实验定量估计土壤的力学特性并确定其行为一直是岩土工程师的主要关注点之一。迄今为止，已经引入了多种方法来实现这一目标，其中动态圆锥触探仪（DCP）测试作为最准确、最有效的方法之一已变得越来越流行。因此，在本研究中，试图通过对含有 2 、 5、 8% 石灰，在养护第 1、7 和 15 天时添加。此外，由于在路面及其底层材料的设计中需要路基反应系数（K），因此进行了平板荷载试验（PLT）来确定K。结果表明，添加高达5%的石灰可提高UCS、CBR和 K 以及泥灰土样品的动态贯入指数 (DPI) 降低。进一步添加石灰对样品的机械特性产生负面影响。此外，利用本研究中相关性获得的方程，通过了解样品的 DPI 可以估计稳定泥灰土的强度特性和路基反应系数。本研究的结果表明，使用 DCP 测试作为一种廉价且易于使用的方法，可以提供土木工程项目中土壤行为的全面视图，并具有岩土工程师可接受的确定系数。