I'm confused in calculating the effective vertical stress in a sandy gravel soil layer below the graound water level and it is between a sand layer on the top and a clay layer on the bottom.
What unit weight i have to consider the sand unit waight or I need the porosityof the sandy gravel to get the unit waight?
What unit weight i have to consider the sand unit waight or I need the porosityof the sandy gravel to get the unit waight?