Correlation of Shear Wave Velocity with Standard Penetration Resistance Value for Allahabad City

Shear wave velocity is the most widely used parameter for microzonation studies, site characterization, groundwater engineering, and environmental studies. Field techniques for the measurement of shear wave velocity are generally not economically viable due to deficiency of skillful personnel or unavailability of equipment. The importance of this study is to develop the empirical correlation between standard penetration resistance value (SPT-N) and shear wave velocity (Vs), for Allahabad, U.P, from the existing correlation developed for other cities of India for all soil condition using regression analysis. In this study 83 borehole data is used to calculate the average shear wave velocity (Vs) for Allahabad city at depths of 1.5, 3, 4.5, 15, and 30 for all soil condition. Also average shear wave velocity map for 30 m depth has been plotted and is used to classify the study area as per IBC-2009 (International Building Code). Results show most of the sites fall under C and D category representing soil conditions.