Z=4.57
Posted: Mon May 16, 2022 12:08 pm
Z=4.57
Problem 4. (25 pts) 4a) (5 pts) Find the total pressure, water pressure and effective pressure at point “A” in the sketch 1. w= 12 %; Gs = 2.55 Strata 1) Sand 12'+ Z e=0.65 Medium Dense Compute Ground Water Table Strata 2) Same soil as Strata 1 but saturated. 8'0" Ysaturated Compute Ysoil = 8'6" Strata 3) Clay A Saturated clay Gs = 2.67 w and e = Same than Consolidation Test Ysoil = Compute (it should be Ysat) LL = 45% 8'6" Rock (impervious) SKETCH 1 4b) (10 pts) The results of the consolidations laboratory test for the clay layer of the sketch 1 shows that the time required for 90% consolidation is 220 min. The sample is 0.75 in thick and it is drained both top and bottom. a) Find the coefficient of consolidation (S.
for the clay. b) Find the time required for 50% of the consolidation of the clay strata. c) Find the time required for 90% of the consolidation of the clay strata. 4c) (10 pts) A building will be constructed on the top of the soil given in sketch 1, which will apply an additional pressure of 7,000 psf. find the consolidation of the clay strata in the sketch 1. The soil is over-consolidated, and the pre-consolidation pressure is 2,000 lb/sf Comment about the reliability of your calculations and its influence on the structural safety of the building. Assume: Cc = 0.009*(LL - 10) Cs = 0.10*Cc
- Z 4 57 1 (152.55 KiB) Viewed 36 times
for the clay. b) Find the time required for 50% of the consolidation of the clay strata. c) Find the time required for 90% of the consolidation of the clay strata. 4c) (10 pts) A building will be constructed on the top of the soil given in sketch 1, which will apply an additional pressure of 7,000 psf. find the consolidation of the clay strata in the sketch 1. The soil is over-consolidated, and the pre-consolidation pressure is 2,000 lb/sf Comment about the reliability of your calculations and its influence on the structural safety of the building. Assume: Cc = 0.009*(LL - 10) Cs = 0.10*Cc