01152211

Component

The seepage path of water through porous composite airport pavement is longer than the length of the seepage path through porous pavement. To enable proper drainage, porous composite airport pavement must have rational structure design. In this paper, multiple seepage models were established through porous asphalt concrete layers with different drainage structures. Based on these models, an equation was developed through the mechanics of fluid flow. This equation was found the depth of the water table flowing through the porous asphalt layer. The maximum depth (Hmax) was solved numerically using the fourth order Runge-Kutta method. According to the regression analysis of the numerical solution, a formula for calculating the maximum length (Lmax) of the seepage path to avoid the surface runoff was found. Based on the formula, under different rainfall intensity, a nomogram on the relationship among seepage length, inclination and air void of porous asphalt, was given. The formula and nomogram can be used to guide structural design of porous composite airport pavement.

01147878

10-0852

English

16p

2010

Transportation Research Board 89th Annual Meeting

DVD

Figures (7) ; References (12) ; Tables (2)

Airport runways; Composite pavements; Design; Pavement layers; Porous materials; Regression analysis; Seepage control; Structural design; Water control; Water table

Aviation; Hydraulics and Hydrology; Pavements; I22: Design of Pavements, Railways and Guideways

Transportation Research Board Annual Meeting 2010 Paper #10-0852

TRIS, TRB

Jan 25 2010 10:24AM