巨粒混合土的相对密度试验研究

揭示了巨粒混合土的最大干密度和最小干密度与巨粒含量的关系。采用剔除法逐步剔除大粒径料，对剩余土料进行相对密度试验，得出巨粒混合土的最大干密度和最小干密度与巨粒含量具有线性正相关性的结论，从而可根据该规律外推原级配巨粒混合土的最大干密度和最小干密度。为解决在目前试验条件下无法直接进行巨粒混合土相对密度试验的难题提供了一种方法。

Experimental study on relative density of soil mixtures with giant grains

In view of the difficulty of determining the density of soil mixtures with giant grains in engineering practice, an experimental method is proposed. This method is trying to establish the relationships between contents of giant grains and maximum as well as minimum dry density of soil mixtures in laboratory. In the process of experiment the giant grains are to be winked out step by step and the relative density of the residual soil is measured accordingly. It is found that the relationship is positive linear correlated. According to this experimental relationship the relative density of soil mixtures with giant grains in prototype can be obtained by the method of extrapolation.