Evaluation of Properties of Soil Subgrade Using （评价土路基使用的属性）.pdfVIP

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Evaluation of Properties of Soil Subgrade Using （评价土路基使用的属性）.pdf

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Evaluation of Properties of Soil Subgrade Using （评价土路基使用的属性）

International Journal of Engineering Research and Development e-ISSN: 2278-067X, p -ISSN: 2278-800X Volume 4, Issue 4 (October 2012), PP. 07-15 Evaluation of Properties of Soil Subgrade Using Dynamic Cone Penetration Index – A Case Study 1 2 Deepika.Chukka , Chakravarthi.V.K 1PG student, Department of Civil Engineering, GMR Institute of technology, Rajam, Andhra Pradesh, India 2Associate Professor, Department of Civil Engineering, GMR Institute of Technology, Rajam, Andhra Pradesh, India Abstract:––The performance of pavements depends to a large extent on the strength and stiffness of the subgrades. Subgrade strength (CBR) plays a major role in pavement design. Since determination of CBR value in field requires need of equipment and also time consuming alternatively one can be predict CBR value of subgrade in field from other soil support tests namely Dynamic Cone Penetrometer Index (DCPI) which has evolved as the most versatile rapid, in situ evaluation device currently available for use in determining sub grade properties. Correlations of DCPT index to CBR and its use in performance evaluation of pavement layers make it an attractive alternative to more expensive and time consuming procedures. In this paper an attempt has been made to develop relationship equations between DCPT index to Index and engineering properties of few subgrades with low plasticity characteristics. The tests include determination of DCP index in field and engineering properties in the lab. Studies are extended for both pre monsoon and post monsoon periods to know the effect of moisture on all properties. Keywords:––Dynamic Cone Pe