CSI SAFE - 04 Define Soil Subgrade Modulas (Allowable bearing pressure and settlement)

For Soil Subgrade Modulus
Soil Subgrade Modulus = K= Pressure/deformation
Pressure= Allowable bearing pressure
Deformation = Allowable settlement in the foundation
For example
Allowable Bearing pressure is 200 kPa and allowable settlement is 25 mm.
The Soil Subgrade modulus will be
K= 200/((25)/1000)=8000 kN/m^3 or 8000 kPa/m
**CHECKS
Pressure under footing less than 200 kPa (OK)
Deformation under footing less than 25 mm (OK)
Punching Shear Check less than 1 (OK)
[Preferable should be less than 0.9]
Tips-
If you are failing in any check, go towards for the change in..….. the inputs….. …like change geometry (Length, width and thickness of the footing) and material property etc.
Note:
Allowable settlement for Isolated Footing = 25 mm
Allowable settlement for MAT/RAFT = 50 mm
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[@civilmdc]

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[@BashirAhmed-jo4zq]

Learning alot from yuor videos
Thanks Buddy

[@SajjadAhmad-gw7sp]

Is all of your course according to the aci standard ?

[@BARTLANTV]

Nice topic and nice presentation..

[@civilmdc]

Thanks

[@leandrarafter]

Hi!! Which calculator is that you use? Thanks a lot!! I love your videos!!

[@civilmdc]

Hi
Welcome
It is Casio FX ,
You can also download, link Is given in the description of the video
ruclips.net/video/jvojP6Db9yA/видео.html

[@dimancheoneplus7pro103]

Dear sir, may I ask what is the reference of allowable settlement you mention above?

[@civilmdc]

These values are almost same in every book...
You can check any book on foundation design

[@jenDz02]

Sir, is it okay that maximum soil pressure is positive? If not, how to reduce the soil pressure?

[@civilmdc]

By increasing footing pad

[@syedshahbazuddin4245]

can you please share any link related with the design of strip footing in SAFE

[@engrkaribul]

please provide the book reference of the calculation procedure of Soil Subgrade Modulus = K= Pressure/deformation

[@civilmdc]

Ok

[@civilmdc]

@@chinyerefemi3598 yes you can also use that
soon i will upload video regarding Modulus of Subgrade Reaction..... Discussion ... i will clear that doubt.

[@SajjadAhmad-gw7sp]

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[@SajjadAhmad-gw7sp]

Sir kindly design 20 story building from a to z using etabs aci codes with foundation