Computation method on 3D porosity of soil microstructure based on digital terrain model
Dan Zhao · Journal of Liaoning Technical University · 2011
In order to fully utilize the 3D information in scanning microscope image,in particular,the internal porosity characteristics of soil samples,a method for calculating 3D porosity based on Digital Terrain Model(DTM) is proposed in this study.This method makes the threshold become unnecessary and avoids the statistical errors caused by the threshold.A case study at a cargo dock in Tianjin port was conducted using the proposed method.Comparing with mercury intrusion method,geotechnical test and previous 2D porosity calculation method based on SEM image,previous 2D porosity method reflecting the porosity in one section is different from the other methods,and the threshold has great effect on the result.The porosity calculation result with 3D method is in agreement with the results from mercury intrusion method and geotechnical test,which reveal the actual characteristics of pore.The proposed method is useful for further study on the internal 3D structure of soil.