SlideRuleEra: thank you for following, and commenting on this issue.
confining comes to effect when the whole structure is constructed, and it's ready for filling with waste water which exerts the vertical loads on the floor slab to be confined in the soil beneath by peripheral piles, and in...
SlideRuleEra: tank height is 7 m with 0.5 m free board, soil cohesion is 50 kPa (doubtable because suction effect may affect the test results) , soil friction angle is 10 degree, and the subgrade modulus is 3e5 N/m3, Poisson ratio is .49, so we are dealing with a loose soil which its bulk...
thank you all,
hokie66: yes got it right, we will use dowels as shear keys between the well-based walls and loose-based floor to constrain the vertical displacement of the floor to the wall at the edge of the wall foundation, and about reinforcement I agree it's high but with dividing the floor...
we have a 80mx40m aeration tank in a waste water treatment plant, subgrade modulus of the soil is very low, considering structural piles only under tank walls and using FLAC code we obtain the maximum settlement about 700mm at the center of the rectangular tank, safety factor against soil...
