A rigid reinforced concrete foundation is subjected to a column load of 87,000 lbs. The foundation measures 8 ft × 8 ft in plan and rests on 21 ft of laye- red soil underlain by rock. The soil layers have the following characteristics: Layer type Loose sand Medium clay Dense sand Thickness (ft) 0-5 5-13 13-21 E, (lb/in.²) 2200 980 9100 Ya (lb/ft³) 105 109 122 If the foundation depth D₁ = 4 ft and µ = 0.4 for all layers, estimate the elastic settlement of the foundation. Use Eq. (11.1)
A rigid reinforced concrete foundation is subjected to a column load of 87,000 lbs. The foundation measures 8 ft × 8 ft in plan and rests on 21 ft of laye- red soil underlain by rock. The soil layers have the following characteristics: Layer type Loose sand Medium clay Dense sand Thickness (ft) 0-5 5-13 13-21 E, (lb/in.²) 2200 980 9100 Ya (lb/ft³) 105 109 122 If the foundation depth D₁ = 4 ft and µ = 0.4 for all layers, estimate the elastic settlement of the foundation. Use Eq. (11.1)
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Question
![A rigid reinforced concrete foundation is subjected to a column load of
87,000 lbs. The foundation measures 8 ft × 8 ft in plan and rests on 21 ft of laye-
red soil underlain by rock. The soil layers have the following characteristics:
Layer type
Loose sand
Medium clay
Dense sand
Thickness (ft)
0-5
5-13
13-21
E, (lb/in.²)
2200
980
9100
Ya (lb/ft³)
105
109
122
If the foundation depth D₁ = 4 ft and µ = 0.4 for all layers, estimate the elastic
settlement of the foundation. Use Eq. (11.1)](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F96b32fde-407b-49e4-a18f-1c1f9aa1a58e%2Faf76fe2f-1a8c-4a6d-abd4-56366a2a7ac4%2Finz3fmj_processed.jpeg&w=3840&q=75)
Transcribed Image Text:A rigid reinforced concrete foundation is subjected to a column load of
87,000 lbs. The foundation measures 8 ft × 8 ft in plan and rests on 21 ft of laye-
red soil underlain by rock. The soil layers have the following characteristics:
Layer type
Loose sand
Medium clay
Dense sand
Thickness (ft)
0-5
5-13
13-21
E, (lb/in.²)
2200
980
9100
Ya (lb/ft³)
105
109
122
If the foundation depth D₁ = 4 ft and µ = 0.4 for all layers, estimate the elastic
settlement of the foundation. Use Eq. (11.1)
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