1. A square footing of dimensions 3 m x 3m carries a column load of 3500 KN resting on the sand layer having 2.4 m thick measured from the top most part of the footing. The footing has a thickness of 0.60 meter The water table is loacted 0.60 meter below the bottom of the footing. The unit weight of sand above the water table is 17.31 KN/m² and has a saturated unit weight of 18.10 KN/m³ below the water table. The sand Compression index due to pre-consolidation pressure, Cs = 0.07 while Cc = 0.35 respectively. Assuming a vertical stress distribution of 2 vertical to 1 horizontal; 1.1. 1.2. 1.3. Calculate the pre-consolidation pressure if the overconsolidation ratio is 2.0. a. 86.29 Kpa b. 47.30 Kpa d. 69.46 Kpa Solve the total effective stress at the midheight of the clay layer. c. 52.64 Kpa a. 120.03 Kpa b. 138.65 Kpa c. 154.76 Kpa d. 34.73 Kpa Calculate the settlement due to the consolidation of the clay layer which is overconsolidated. A. 63.48 mm b. 38.24 mm c. 40.25 mm d. 59.47 mm
1. A square footing of dimensions 3 m x 3m carries a column load of 3500 KN resting on the sand layer having 2.4 m thick measured from the top most part of the footing. The footing has a thickness of 0.60 meter The water table is loacted 0.60 meter below the bottom of the footing. The unit weight of sand above the water table is 17.31 KN/m² and has a saturated unit weight of 18.10 KN/m³ below the water table. The sand Compression index due to pre-consolidation pressure, Cs = 0.07 while Cc = 0.35 respectively. Assuming a vertical stress distribution of 2 vertical to 1 horizontal; 1.1. 1.2. 1.3. Calculate the pre-consolidation pressure if the overconsolidation ratio is 2.0. a. 86.29 Kpa b. 47.30 Kpa d. 69.46 Kpa Solve the total effective stress at the midheight of the clay layer. c. 52.64 Kpa a. 120.03 Kpa b. 138.65 Kpa c. 154.76 Kpa d. 34.73 Kpa Calculate the settlement due to the consolidation of the clay layer which is overconsolidated. A. 63.48 mm b. 38.24 mm c. 40.25 mm d. 59.47 mm
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:1.
A square footing of dimensions 3 m x 3m carries a column load of 3500 KN resting on the sand layer having
2.4 m thick measured from the top most part of the footing. The footing has a thickness of 0.60 meter. The
water table is loacted 0.60 meter below the bottom of the footing. The unit weight of sand above the water
table is 17.31 KN/m³ and has a saturated unit weight of
KN/m³ below the water table. The sand
overlies a clay layer 1.2 meters thick having a saturated unit weight of 16.50 KN/m³ and a void ratio of 1.70.
Compression index due to pre-consolidation pressure, Cs = 0.07 while Cc = 0.35 respectively. Assuming a
vertical stress distribution of 2 vertical to 1 horizontal;
1.1.
1.2.
1.3.
Calculate the pre-consolidation pressure if the overconsolidation ratio is 2.0.
a. 86.29 Kpa
b. 47.30 Kpa
c. 52.64 Kpa
d. 69.46 Kpa
Solve the total effective stress at the midheight of the clay layer.
a
120.03 Kpa
b. 138.65 Kpa
c. 154.76 Kpa
Calculate the settlement due to the consolidation of the clay layer which is overconsolidated.
A. 63.48 mm
b. 38.24 mm
c. 40.25 mm
d. 59.47 mm
d. 34.73 Kpa
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