Abstract
The thickness of the steel sheet pile which is a main structural component of port facilities is measured to evaluate its soundness. It is helpful to estimate the spatial distribution of the thickness of steel sheet pile from small number of the measured data.
In this study, the authors applied the spatial statistics (kriging) method to predict the spatial distribution of the thickness of steel sheet pile, then the following two were discussed; 1) the optimum combination of the variogram functions, the least square methods and the nugget effect, and 2) the appropriate measurement interval of thickness in a sheet pile quaywall.
From the result of 1), evaluation of the nugget effect and choice a suitable combination of the variogram function and the least square method were important to enhance the accuracy of the predicted spatial distribution. From the result of 2), to keep the accuracy of the predicted spatial distribution in the tested structure, the appropriate measurement interval was less than 20 m along the normal direction.
