Do-nou Technology​

Do-nou is a Japanese word that means wrapping soil in a gunny bag – size of Do-nou bag 45cm by 60cm.

Do-nou technology application on road maintenance involves use of these gunny bags to repair and maintain damaged sections of the road. The bags are filled appropriately with either sand, farm soil or gravel (murram), thereafter properly securing the bag opening with an appropriate string. The bags are laid in a systematic way, compacted and covered with a wearing course of gravelly material (murram).

A Do-nou bag has a high bearing capacity of upto 250 KN (can carry an axle load of up to 25 tonnes). They are commonly used to raise embankments to prevent floods, construct temporary structures in response to disasters and reinforcing soft buildings’ foundations.

Step 1: Bush clearing and pruning of trees on the roadside.

Step 2: Soil stripping i.e., removal of vegetation on the surface.

Step 3: Setting out ie, using pegs and strings to mark out drainage and road carriageway

Step 4: Ditching ie,excavation of drains.

Step 5: Do-nou works to improve road level and poor spots to required depth

Step 6: Culvert cleaning ie,removal of silt blocking culverts and Culvert placement ie, installation of culverts 

Step 7: Laying of slabs on residential entrances

Step 8: Stone pitching on drains to slow the flow of water