Abstract
The permeable pavement may mix Roadbed materials to subgrade soil in a subgrade when it becomes the soft ground. As these measures，become able to maintain a design thickness and restraint of the drop of the support power of the pavement by laying a geotextiles (the following nonwoven fabric) nonwoven fabric between roadbed and a roadbed. But, do not reach it before it is established method to evaluate the durability performance of the nonwoven fabric which it laid under pavement. I examined it of the nonwoven fabric after having laid it with pavement.
