The construction t
The construction technique
The site must first be prepared by removing trees, shrubs, etc. and then be levelled.
Before the granular sub- base is placed the formation width is covered with geotextile .A further requirement is that the geotextile should be anchored on each side of the road. The bound length to give this anchorage is around 1.0-1.5 m. This can be achieved by extending the geotextile beyond the required running width of the road, as illustrated in figure (I.12a) or by providing an equivalent bond length by burring the fabric in shallow trenches figure (I.12 b) or by warping around figure (I.12 c) (18)