A STUDY ON MEASUREMENT METHOD OF THE PERMEABILITY OF DRAINAGE PAVEMENTS

It is indicated that the field permeability test used in order to measure the permeability of drainage pavement has a problem in the testing method or the testing machine itself. Therefore, the cause which a measurement error generates was clarified in the field permeability test. Moreover, the method of measuring the permeability coefficient of the horizontal permeability which flows parallel with a road surface was developed, and the result and comparison of an field permeability test were performed. Consequently, it confirmed that a permeability coefficient could not be measured by the field permeability test. And it was able to propose about the testing machine and the method for measuring ermeability by an amount of permeability.