Abstract

The dynamic cone penetration test (DCPT) is a common method for assessing the physical and mechanical properties of cohesionless soils. However, current formulas might not be suitable for carbonate granular soil because of its unique engineering properties. In this study, a series of DCPTs were conducted on carbonate granular soil in the field and laboratory using a light dynamic penetrometer (LDP). The results show that for a given relative density, the dynamic cone penetration resistance of carbonate granular soil increases with the mean diameter as well as the coefficient of uniformity, and it is greater than that of quartz granular soil with a similar gradation. Moreover, the relationship between the dynamic cone penetration resistance and relative density of carbonate granular soil, considering the particle size and gradation effect, is established for the LDP. The feasibility of this relationship is verified using the model test results of two other sets of carbonate sands.

摘要

动态锥渗透试验（DCPT）是评估无粘性土壤物理和机械性能的常用方法。但是，由于其独特的工程特性，当前的配方可能不适用于碳酸盐颗粒土壤。在这项研究中，使用光动力渗透计（LDP）在田间和实验室对碳酸盐颗粒土壤进行了一系列DCPT。结果表明，在给定的相对密度下，碳酸盐颗粒状土的动锥抗性随平均直径和均匀系数的增加而增加，并且比具有类似等级的石英颗粒状土的动锥抗性更大。此外，考虑到粒径和级配效应，动态锥渗透阻力与碳酸盐颗粒土壤相对密度之间的关系，为LDP建立。使用另外两组碳酸盐砂的模型测试结果验证了这种关系的可行性。