Effective stress

[Venpr]

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?

 

[tymr]

Can you post the problem question? The unit weight of sandy gravel can vary.

 

[Venpr]

Can you post the problem question? The unit weight of sandy gravel can vary.

Look my last post! (the problem)

 

[Venpr]

Look my last post (the problem)

 

[tymr]

Effective stress requires a depth of the soil as well as how far beneath the ground surface the water is located. There are many ways to solve for the unit weight of a soil. Best of luck to you.