Document Type

Conference Proceeding

Publisher

Centre for Infrastructure Engineering and Safety

Faculty

Faculty of Computing, Health and Science

School

School of Computer and Security Science

RAS ID

13236

Comments

This article was originally published as: Gill, K., Jha, J., Choudhary, A., & Shukla, S. K. (2011). Estimation of CBR value using dynamic cone penetrometer. Paper presented at the Computer Methods for Geomechanics: 13th Int Conference of the Int Association for Computer Methods and Advances in Geomechanics. Melbourne, Australia. Conference website available here.

Abstract

IRC•37-2001, the Indian Roads Congress standard deals with the design of flexible pavements and recommends the California Bearing Ratio (CBR) as an indicator of subgrade soil strength. The subbase/base thickness of pavement is governed by the CBR value of the subgrade soil along with some other parameters such as traffic intensity, climatic conditions, etc. The conventional CBR testing method is expensive, time consuming and its repeatability is low. Additionally, it is very difficult to mould the sample at the desired in-situ density in the laboratory CBR test. Values of in• situ density are underestimated due to local dampness of surface water percolation and stress release while taking out the sample. Dynamic cone penetration test (DCPT) value conducted in the field can be used to estimate the CBR value provided a suitable relationship exists between CBR and DCPT value. In the present study an attempt has been made to establish a relationship between the DCPT value and the CBR.

 
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