Civil Engineering - Soil Mechanics and Foundation Engineering - Discussion
Discussion Forum : Soil Mechanics and Foundation Engineering - Section 1 (Q.No. 12)
12.
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
Discussion:
9 comments Page 1 of 1.
Suraj mehta said:
6 years ago
More than 1 is correct.
Ashu Mishra said:
7 years ago
How can explain effective stress in detail?
Saurabh mishra said:
7 years ago
OCR will be less than 1. Because present value of effective stress more than past value. Effective stress increases with time.
Saurabh mishra said:
7 years ago
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.
Mahesh said:
8 years ago
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.
For overconsolidated soil OCR > 1.
For Normally consolidated soil OCR = 1.
For Under consolidated soil OCR < 1.
(11)
Himanshu bhatt said:
9 years ago
OCR for over constant clay is >1.
OCR for normally constant clay is <1.
OCR for normally constant clay is <1.
Samyak said:
1 decade ago
For over consolidated soil :- Present stress is less than Preconsolidation stress (According to NPTEL). Thus more than 1.
(1)
Naba said:
1 decade ago
A soil is over consolidated if the existing effective stress is less than the pre consolidation stress.
Thus the ratio is less than 1.
Thus the ratio is less than 1.
(1)
B.Lakshmi Narayana said:
1 decade ago
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.
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