A 4ft by 4ft spread footing is proposed where the bottom of footing is set 2ft below grade. The column bearing on this footing will impose a load of 180kips. Assuming the subsurface conditions shown below with groundwater 5ft below grade, Use Schmertman’s method to calculate the elastic settlement of the system 6 years after construction is completed, provide a clear sketch and show units and state assumptions.

Principles of Foundation Engineering (MindTap Course List)
9th Edition
ISBN:9781337705028
Author:Braja M. Das, Nagaratnam Sivakugan
Publisher:Braja M. Das, Nagaratnam Sivakugan
Chapter10: Mat Foundations
Section: Chapter Questions
Problem 10.1P: Refer to the rectangular combined footing in Figure 10.1, with Q1 = 100 kip and Q2 = 150 kip. The...
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A 4ft by 4ft spread footing is proposed where the bottom of footing is set 2ft below grade. The column bearing on this footing will impose a load of 180kips. Assuming the subsurface conditions shown below with groundwater 5ft below grade, Use Schmertman’s method to calculate the elastic settlement of the system 6 years after construction is completed, provide a clear sketch and show units and state assumptions.

1. A 4ft by 4ft spread footing is proposed where the bottom of footing is set 2ft below
grade. The column bearing on this footing will impose a load of 180kips. Assuming the
subsurface conditions shown below with groundwater 5ft below grade, Use
Schmertman's method to calculate the elastic settlement of the system 6 years after
construction is completed, provide a clear sketch and show units and state assumptions.
Oft
Sand
Ymoist = 120 pcf
Phi - 30deg
Es = 52 ksf
4ft
Loose Sand
5ft
Ymoist - 125 pef
Yat = 145 pcf
Phi - 22deg
Es (above GW) = 30 ksf
Es (below GW) = 20 ksf
Dense Sand
Yat- 155 pef
Phi = 35deg
Es = 60 ksf
20ft
Transcribed Image Text:1. A 4ft by 4ft spread footing is proposed where the bottom of footing is set 2ft below grade. The column bearing on this footing will impose a load of 180kips. Assuming the subsurface conditions shown below with groundwater 5ft below grade, Use Schmertman's method to calculate the elastic settlement of the system 6 years after construction is completed, provide a clear sketch and show units and state assumptions. Oft Sand Ymoist = 120 pcf Phi - 30deg Es = 52 ksf 4ft Loose Sand 5ft Ymoist - 125 pef Yat = 145 pcf Phi - 22deg Es (above GW) = 30 ksf Es (below GW) = 20 ksf Dense Sand Yat- 155 pef Phi = 35deg Es = 60 ksf 20ft
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