Road Drainage Systems with Typar Geotextile: To manage surface and ground water for road network, subsurface drains are built with a permeable conduit such as corrugated plastic, geonet, tubing, tile, stone, pipe or any combination installed beneath the ground surface to collect and/or convey drainage water to an outlet.
Effective subsurface drains are essential to prevent the harmful and destructive force of uncontrolled water.
TYPAR® Geotextile subsurface drains are simple so to design and but inexpensive to construct.
TYPAR is recommended in all subsurface drains so to provide a separator to prevent intermixing of the drainage aggregate materials with the subgrade soil and therefore protect the drainage system from clogging.
Drainage Problem without Typar Geotextile
Drainage with Typar Geotextile
- The base and side walls of the trench should be as free of irregularities as possible (holes, roots, etc.). Lay Typar® parallel to the trench and anchor the edges of the fabric.
- Do not drag the fabric in the mud. So this will result in the deposit of a large amount of fine particles on the surface of Typar® and thus creating an impervious film.
- Do not use over-large stones to fill up the trench.
- Compact the aggregate and enclose it withTypar® before backfilling to the top of the trench.
- Overlap lengths of Typar® by at least 30 cm.