DRAINAGE, AND LOAD-CARRYING CAPACITY OF PAVEMENTS. RAINFALL INFILTRATION

A systematic analysis is presented that simulates rainfall infiltration into the base course, and subsequently the rate of drainage out the base course into the subgrade and into lateral drainage. The method incorporates the distribution of the amount of rainfall, probabilities of wet and dry days, infiltration of water into the pavement through cracks and joints, and the drainage of a base course. A Gamma distribution is used for describing the probability density function for the quantity of rain that falls, and a Markov chain model is applied for estimating the probabilities of wet and dry days. A new model that uses a parabolic phreatic surface and allows drainage through a permeable subgrade has been developed for computing the drainage of the pavement base and subgrade.

RAINFALL INFILTRATION, DRAINAGE, AND LOAD-CARRYING CAPACITY OF PAVEMENTS. Academic Article