碎石土路基填土的级配特征与压实特性研究

RESEARCH ON GRAIN SIZE DISTRIBUTION AND COMPACTIBLE PROPERTIES OF GRAVEL SOIL FOR ROAD BASE FILLINGS

从影响碎石土路基压实特征的因素之一———碎石土本身的级配特征入手,通过试验和多元线性回归确定了特征粒径和最大干密度以及特征粒径和最佳激振频率、最佳振动荷重之间的关系,提出了级配特征值的概念。通过回归方程可确定某种级配碎石土的最大干密度和最佳激振频率等振动参数指标,为室内试验和现场施工做出指导。

It is described one of factors that influence the maximum dry density of gravel soils.According to test results,the concept eigenvalue of grain size distribution is put forward,and a so-called gradation function that describing the relationship between the maximum dry density and the eigenvalue of grain size distribution of gravel soils as well as the optimum frequency of dynamic compacting force is established with multi-regression method.The maximum dry density and the optimum frequency for a kind of gravel soil with a special eigenvalue of grain size distribution can be obtained from the gradation characteristic function,which can guide indoor experiment and insitu construction of gravel base.