Reasons
1.improper compaction of soil
2.improper water drainage system
3.poor quality materials road
4.improper moisture content.
5.working load is more than design load
6.
Reasons
1.improper compaction of soil
2.improper water drainage system
3.poor quality materials road
4.improper moisture content.
5.working load is more than design load
6.low grade material used
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