Seismic site characterization and development of SPT(N) to shear wave velocity correlation of Noida city
Abstract
Noida, situated in proximity to major tectonic structures within a seismically active region, is susceptible to earthquake hazards. The destruction caused by an earthquake is influenced by the soil characteristics at a site, which play a significant role in amplifying ground shaking. To mitigate these devastating effects, it is essential for design practices to account for local site effects in seismic site characterization studies. Seismic site characterization using shear wave velocity ([Formula: see text]) is typically performed through the Seismic cross-hole test (CHST), which is challenging to implement in densely populated areas. However, the Standard penetration test (SPT-N), a method widely used by civil engineers, can be leveraged to estimate [Formula: see text] in such areas by developing correlations between [Formula: see text] and SPT-N values. The present study aims to develop empirical correlations between standard penetration test (SPT-N) values and shear wave velocities ([Formula: see text]) derived from seismic cross-hole tests and standard penetration tests. This study is significant because no prior seismic site characterization studies exist for Noida. From a total set of 117 boreholes, Geotechnical data from 26 boreholes and geophysical data from 14 seismic cross-hole tests (CHST) spread across Noida are utilized to establish a reliable SPT-[Formula: see text] correlation using non-linear regression analysis. The proposed correlations were benchmarked…
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