A small but heavily loaded utility building has dimensions of 20 m x 20 m. It applies a uniform load on its mat foundation of 100 kN/m. Its mat foundation sits 1 m below the surface. The soil profile consists of 3 m of a dry sand, with y = 17.5 kN/m under laid by a 5 m thick clay layer with a y = 18.5 kN/m', a moisture content of 22%, C. = 0.30 and a G; = 2.70. The clay stratum is under laid by another sand stratum, and the phreatic surface coincides with the top of the clay stratum. (40) Using the Newmark method, what are the new stresses at the top and bottom of the clay stratum due to the building's loading? (41) What is the expected differential settlement between the building's center and one of its corners, in mm? (42) If a laboratory sample 4" thick of the field clay attained 50% consolidation in 5 hours, what time will the clay layer in the field attain 60% consolidation? q=100 kN/m? 1 m SAND 3 m 2 m CLAY y = 18.5 kN/m w= 22 % 5m to
A small but heavily loaded utility building has dimensions of 20 m x 20 m. It applies a uniform load on its mat foundation of 100 kN/m. Its mat foundation sits 1 m below the surface. The soil profile consists of 3 m of a dry sand, with y = 17.5 kN/m under laid by a 5 m thick clay layer with a y = 18.5 kN/m', a moisture content of 22%, C. = 0.30 and a G; = 2.70. The clay stratum is under laid by another sand stratum, and the phreatic surface coincides with the top of the clay stratum. (40) Using the Newmark method, what are the new stresses at the top and bottom of the clay stratum due to the building's loading? (41) What is the expected differential settlement between the building's center and one of its corners, in mm? (42) If a laboratory sample 4" thick of the field clay attained 50% consolidation in 5 hours, what time will the clay layer in the field attain 60% consolidation? q=100 kN/m? 1 m SAND 3 m 2 m CLAY y = 18.5 kN/m w= 22 % 5m to
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:A small but heavily loaded utility building has dimensions of 20 m x 20 m. It applies a uniform
load on its mat foundation of 100 kN/m. Its mat foundation sits 1 m below the surface. The soil
profile consists of 3 m of a dry sand, with y = 17.5 kN/m under laid by a 5 m thick clay layer with
a y = 18.5 kN/m', a moisture content of 22%, C. = 0.30 and a G; = 2.70. The clay stratum is under
laid by another sand stratum, and the phreatic surface coincides with the top of the clay stratum.
(40) Using the Newmark method, what are the new stresses at the top and bottom of the clay
stratum due to the building's loading?
(41) What is the expected differential settlement between the building's center and one of its
corners, in mm?
(42) If a laboratory sample 4" thick of the field clay attained 50% consolidation in 5 hours,
what time will the clay layer in the field attain 60% consolidation?
q=100 kN/m?
1 m
SAND
3 m
2 m
CLAY
y = 18.5 kN/m w= 22 %
5m
to
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