An office building is planned to be built on the site shown below. The total weight of the building is 136,000.00 kips, spread over a square footing of 200 ft by 200ft. The contractor is anxious about the settlement in the soil layers under the weight of the building and decides to accumulate the settlement through a temporary sand surcharge (surcharge load equal to the building load) placed on the soil before the construction of the building begins. Sand Y = 125 pcf Clay Y = 130 pcf eo = 0.95 LL = 28 Impermeable bedrock Sand Surcharge Area = 200' x 200' 15ft 30ft 20ft

Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
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An office building is planned to be built on the site shown below. The total weight of the
building is 136,000.00 kips, spread over a square footing of 200 ft by 200ft. The contractor is
anxious about the settlement in the soil layers under the weight of the building and decides to
accumulate the settlement through a temporary sand surcharge (surcharge load equal to the
building load) placed on the soil before the construction of the building begins.
Sand
Y = 125 pcf
Clay
Y = 130 pcf
eo = 0.95
LL = 28
Impermeable bedrock
Sand Surcharge Area = 200' x 200'
15ft
30ft
20ft
Transcribed Image Text:An office building is planned to be built on the site shown below. The total weight of the building is 136,000.00 kips, spread over a square footing of 200 ft by 200ft. The contractor is anxious about the settlement in the soil layers under the weight of the building and decides to accumulate the settlement through a temporary sand surcharge (surcharge load equal to the building load) placed on the soil before the construction of the building begins. Sand Y = 125 pcf Clay Y = 130 pcf eo = 0.95 LL = 28 Impermeable bedrock Sand Surcharge Area = 200' x 200' 15ft 30ft 20ft
Assume the settlement of the sand under the surcharge load is 1.75 inches. What is the total
settlement (i.e. all soil layers) in inches under the surcharge? You may use the mid-height of the
clay layer as your reference point. (use Cc=0.2)
9.4
7.6
O2.4
What is the time [days] required to attain 60% consolidation of the clay stratum? (Tv = 0.3). This
time will be needed before construction can begin. Your coefficient of consolidation will be
1*10-3 in²/second.
200
50
400
25
Transcribed Image Text:Assume the settlement of the sand under the surcharge load is 1.75 inches. What is the total settlement (i.e. all soil layers) in inches under the surcharge? You may use the mid-height of the clay layer as your reference point. (use Cc=0.2) 9.4 7.6 O2.4 What is the time [days] required to attain 60% consolidation of the clay stratum? (Tv = 0.3). This time will be needed before construction can begin. Your coefficient of consolidation will be 1*10-3 in²/second. 200 50 400 25
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