Civil Engineering - Soil Mechanics and Foundation Engineering - Discussion


The maximum value of effective stress in the past divided by the present value, is defined as over consolidation ratio (OCR). The O.C.R. of an over consolidated clay is

[A]. less than 1
[B]. 1
[C]. more than 1
[D]. None of these.

Answer: Option C


No answer description available for this question.

B.Lakshmi Narayana said: (Sep 20, 2013)  
Consolidation mostly happens in clayey soils only. Initially, there will be pore water pressure, after consolidation is said to be happened; pore water escapes and thus plastic readjustment of clay particles occurs, results in very low effective stress. Thus the ratio will be greater than 1 always.

Naba said: (Feb 26, 2015)  
A soil is over consolidated if the existing effective stress is less than the pre consolidation stress.

Thus the ratio is less than 1.

Samyak said: (Jul 19, 2015)  
For over consolidated soil :- Present stress is less than Preconsolidation stress (According to NPTEL). Thus more than 1.

Himanshu Bhatt said: (Apr 25, 2016)  
OCR for over constant clay is >1.

OCR for normally constant clay is <1.

Mahesh said: (Dec 21, 2017)  
Over-consolidation ratio (OCR)= (Maximum applied effective stress in past )/(Maximum applied effective stress in present).

For overconsolidated soil OCR > 1.
For Normally consolidated soil OCR = 1.
For Under consolidated soil OCR < 1.

Saurabh Mishra said: (Mar 22, 2018)  
Because effective stress increases with time due to continuous consolidation, so the present value of effective stress is more and the OCR will be less than 1.

Saurabh Mishra said: (Mar 22, 2018)  
OCR will be less than 1. Because present value of effective stress more than past value. Effective stress increases with time.

Ashu Mishra said: (Apr 10, 2018)  
How can explain effective stress in detail?

Suraj Mehta said: (Aug 11, 2019)  
More than 1 is correct.

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