Sub-soil Drain: Type II

1. The emergency lane affected shall be cut using diamond cutter.
2. The 1200 mm (required depth) by 400 mm (width) trench shall be excavated.
3. The non-woven geo-textile shall be laid manually inside the trench.
4. The 150 mm diameter porous pipe is then laid manually inside the trench with specific gradient that will ensure easy flow of water.
5. Followed with backfilling of 20 – 25 mm single size aggregate to the required thickness.
6. No fine concrete is then poured to the thickness as mentioned in drawings.
7. Bituminous layers are then laid as required in scope of works.