ABSTRACT
In this study, the engineering properties of long-fiber spun bonded nonwoven geotextiles and short-fiber needle-punched nonwoven geotextiles used as tunnel drainage materials were evaluated and analyzed to consider their sustainable applicability. Mechanical properties of long-fiber spun bonded nonwoven geotextiles showed significantly higher tensile strength compared to short-fiber needle-punched nonwoven geotextiles. Strength retention of long-fiber spun bonded nonwoven geotextiles at room temperature was generally unaffected by pH value. However, short-fiber needle-punched nonwoven geotextiles It was found that the resistance to alkali was low as the pH value increased and the treatment time increased, which significantly decreased.
