Help with these two question for clarity.
1. In primary consolidation is the H (thickness of soil layer) always reference the hight of the clay layer only and not the sand layer at any time.
Is this true? In primary consolidation is the compressible soil strata always split into two layers with maximum of 15 feet for hand calculation?
Example given a load of 450psf sits on top of a sandy soil of depth 10 ft (sp-wt= 120 lb/cf )and immediately below that is 10 feet (sp-wt= 95 lb/cf ) of clay layer. The water table is also located 10 feet below the load. If I need to find the initial effective overburden pressure of the normally consolidated layer.
Is it always the norm to not incorporate the entire depth under the load (i.e. the entire 20 ft)
This is how it's calculated.
(120 lb/cf *10) + (95 lb/cf -62.4lb/cf )*5 = 1813lb/cf
1. In primary consolidation is the H (thickness of soil layer) always reference the hight of the clay layer only and not the sand layer at any time.
Is this true? In primary consolidation is the compressible soil strata always split into two layers with maximum of 15 feet for hand calculation?
Example given a load of 450psf sits on top of a sandy soil of depth 10 ft (sp-wt= 120 lb/cf )and immediately below that is 10 feet (sp-wt= 95 lb/cf ) of clay layer. The water table is also located 10 feet below the load. If I need to find the initial effective overburden pressure of the normally consolidated layer.
Is it always the norm to not incorporate the entire depth under the load (i.e. the entire 20 ft)
This is how it's calculated.
(120 lb/cf *10) + (95 lb/cf -62.4lb/cf )*5 = 1813lb/cf