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Topic: Geotechnical design and analysis
Subject: subgrade modulus
 
Author: Nejat Ozcimen 2001-07-12  
     
  hi
does anybody has info. about the subgrade modulus coefficient, k (t/m3) can be used for the settlement amount?
if the mat foundation system is rigid and the layer below it is sandy silty clay;
as far as i know it can not be used for the settlement calculations. it is only used for differencial deformations.?
empric correlations recommended for the k coefficient is 1500-2000 t/m3 for this soil structure.
But if you calculate that from the formula (Braja Das. "princ. of foun. engng.)it will be app. 150-200 t/m3.

and consequently:
if you use emprical values the settlement value is 1-2 cm.
and if the other, the sett. is 12-13 cm.
if i calculate the settlement by classical stress distribution method, it will be 15 cm.

i use this modulus as a soil parameter to the SAP2000 programme.

would you tell me that which value is reliable? and can i calculate the settlement amount by this way?..
thanks..
 
   

 

Follow-up:
  Author: chai 2005-02-03  
     
  I think the subgrade modulus of soil should be 1500-2000 t/m3 .  
     
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Follow-ups:

» Paul W. Mayne, 2001-07-12
» Nejat Ozcimen, 2001-07-13
» Maryam Akbarzad, 2005-01-19
» chai, 2005-02-03

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