Study on Correlation Distance of Soil by Distribution-free Statistical Test Methods SHEN Hong,ZHU Rui geng (School of Civil Engineering and Architecture, WUT, Wuhan 430070, China)The effect of various soilmass and parameters of soil property on the correlation distance is studied by methods of distribution free statistical test. The correlation distance which is a property of soilmass calculated from in situ parameters is thought to be more reliable, and often greater than those calculated from indoor experiments. There may be no statistical difference among the correlation distances resulted from various parameters.distribution free statistical test; correlation distance; parameter of soil property