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Raul Jimenez
Senior Project Manager
Asked a question 2 years ago

What are the procedure for road construction on unsuitable subgrade

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Henry Newman
Water resource engineer


If the subgrade is unsuitable for road construction then replace that subgrade with a suitable type of subgrade that having a good bearing capacity and ability to resist an applied load by vehicles.

there are various techniques to increase the bearing capacity of a suitable subgrade and make it suitable for use.

Refer IRC 002, IRC 064:1990 for various methods.

following are some methods are described briefly for stabilization of the unsuitable subgrade

Removal/replacement of fills. Traditional compaction methods Uses of mechanical stabilization Techniques Use chemical stabilization