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Abstract <p>Shear wave velocity (<i>V</i><sub>s</sub>) and standard penetration test blow counts (SPT-<i>N</i>) are significant for characterizing and determining the stability of the soil column. Engineers use SPT-<i>N</i> values to calculate the bearing capacity of the soil, which is critical for designing the foundation of a structure. <i>V</i><sub>s</sub> can be determined by <i>in situ</i> wave propagation test either directly through multichannel analysis of surface wave (MASW) test or empirically from SPT-<i>N</i> or sometimes in combination. But usually, it is not always possible to perform both tests simultaneously since it is not economically viable and time-consuming. The present study offers a well-established correlation between <i>V</i><sub>s</sub> obtained from MASW tests and the SPT-<i>N</i> recorded at several locations in Tinsukia City for different categories of soil. A total of 70 sample data has been used from 15 locations of Tinsukia for determining the association between SPT-<i>N</i> and <i>V</i><sub>s</sub>. The proposed relationships align with those found globally for different locations and an evaluation against existing relationships is also included in this article. These types of relationships have not been documented and demonstrated before in this area. These empirical relationships facilitate the estimation of <i>V</i><sub>s</sub> from commonly obtained SPT-<i>N</i>, as well as the prediction of SPT-<i>N</i> when <i>V</i><sub>s</sub> data are available. The <i>V</i><sub>s</sub> and SPT-<i>N</i> are the crucial elements in the study of ground response and geotechnical engineering. The established correlations will significantly aid in site characterization, seismic hazard microzonation, and geotechnical assessments, particularly across the extensive Brahmaputra plains.</p> Research Highlights <p><UnorderedList Mark="Bullet"> <ItemContent> <p>The relationships developed in the present study may be effectively utilized in seismic microzonation, site characterization, and geotechnical investigation of the region or in any parts of the vast Brahmaputra alluvium plains.</p> </ItemContent> <ItemContent> <p>Provides a reliable regional reference with scope for refinement as new data emerge.</p> </ItemContent> <ItemContent> <p>Enables estimation of SPT-<i>N</i>-value from <i>V</i><sub>s</sub> using MASW when drilling is not feasible.</p> </ItemContent> </UnorderedList></p>

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Correlation between shear wave velocity (Vs) and SPT resistance (N) for Brahmaputra plain – A case study from Tinsukia region, Assam

  • 期刊论文

  • 发表日期：

    2026年2月25日

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  • Sandipan Das,
  • Koyel Sarkar,
  • Gaikungam Rongmei,
  • Arun Bhadran,
  • K Laxminarayana,
  • M S Singh,
  • A K Singh

摘要

Abstract

Shear wave velocity (Vs) and standard penetration test blow counts (SPT-N) are significant for characterizing and determining the stability of the soil column. Engineers use SPT-N values to calculate the bearing capacity of the soil, which is critical for designing the foundation of a structure. Vs can be determined by in situ wave propagation test either directly through multichannel analysis of surface wave (MASW) test or empirically from SPT-N or sometimes in combination. But usually, it is not always possible to perform both tests simultaneously since it is not economically viable and time-consuming. The present study offers a well-established correlation between Vs obtained from MASW tests and the SPT-N recorded at several locations in Tinsukia City for different categories of soil. A total of 70 sample data has been used from 15 locations of Tinsukia for determining the association between SPT-N and Vs. The proposed relationships align with those found globally for different locations and an evaluation against existing relationships is also included in this article. These types of relationships have not been documented and demonstrated before in this area. These empirical relationships facilitate the estimation of Vs from commonly obtained SPT-N, as well as the prediction of SPT-N when Vs data are available. The Vs and SPT-N are the crucial elements in the study of ground response and geotechnical engineering. The established correlations will significantly aid in site characterization, seismic hazard microzonation, and geotechnical assessments, particularly across the extensive Brahmaputra plains.

Research Highlights

The relationships developed in the present study may be effectively utilized in seismic microzonation, site characterization, and geotechnical investigation of the region or in any parts of the vast Brahmaputra alluvium plains.

Provides a reliable regional reference with scope for refinement as new data emerge.

Enables estimation of SPT-N-value from Vs using MASW when drilling is not feasible.