A Sridharan, professor and K Prakash, research scholar, civil engineering department, Indian Institute of Science, Bangalore, India. This paper was first published in GE’s February 1998 edition.
For a practising geotechnical engineer, a reasonable value of coefficient of consolidation for the soil is a requirement for the settlement analysis. As it has been shown recently that it is possible under certain circumstances to predict satisfactorily the field settlement rate using the c, obtained from the laboratory test itself, it would be of help to estimate the c, which can represent the soil behaviour reasonably well, without resorting to elaborate, time consuming curve fitting procedures from the laboratory data. This note proposes such a procedure which is simple, quick and reliable, the results of which are statistically compared with the other methods. The method is hoped to optimise the effort and time of the geotechnical personnel.