Shear wave velocity as function of cone penetration resistance and grain size for Holocene-age uncemented soils: a new perspective.

Saved in:

Bibliographic Details
Title:	Shear wave velocity as function of cone penetration resistance and grain size for Holocene-age uncemented soils: a new perspective.
Authors:	Karray, Mourad¹ Mourad.Karray@Usherbrooke.ca, Hussien, Mahmoud Mahmoud.Nasser.Ahmed@USherbrooke.ca
Source:	Acta Geotechnica. Oct2017, Vol. 12 Issue 5, p1129-1158. 30p.
Subjects:	Soil penetration test, Shear waves, Particle size distribution, Stiffness (Mechanics), Grain size
Abstract:	For feasibility studies and preliminary design estimates, field measurements of shear wave velocity, V , may not be economically adequate and empirical correlations between V and more available penetration measurements such as cone penetration test, CPT, data turn out to be potentially valuable at least for initial evaluation of the small-strain stiffness of soils. These types of correlations between geophysical ( Vs) and geotechnical ( N-SPT, q -CPT) measurements are also of utmost importance where a great precision in the calculation of the deposit response is required such as in liquefaction evaluation or earthquake ground response analyses. In this study, the stress-normalized shear wave velocity V (in m/s) is defined as statistical functions of the normalized dimensionless resistance, Q -CPT, and the mean effective diameter, D (in mm), using a data set of different uncemented soils of Holocene age accumulated at various sites in North America, Europe, and Asia. The V - Q data exhibit different trends with respect to grain sizes. For soils with mean grain size ( D ) < 0.2 mm, the V / Q ratio undergoes a significant reduction with the increase in D of the soil. This trend is completely reversed with further increase in D ( D > 0.2 mm). These results corroborate earlier results that stressed the use of different CPT-based correlations with different soil types, and those emphasized the need to impose particle-size limits on the validity of the majority of available correlations. [ABSTRACT FROM AUTHOR]
	Copyright of Acta Geotechnica is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database:	Engineering Source

Description
Abstract:	For feasibility studies and preliminary design estimates, field measurements of shear wave velocity, V , may not be economically adequate and empirical correlations between V and more available penetration measurements such as cone penetration test, CPT, data turn out to be potentially valuable at least for initial evaluation of the small-strain stiffness of soils. These types of correlations between geophysical ( Vs) and geotechnical ( N-SPT, q -CPT) measurements are also of utmost importance where a great precision in the calculation of the deposit response is required such as in liquefaction evaluation or earthquake ground response analyses. In this study, the stress-normalized shear wave velocity V (in m/s) is defined as statistical functions of the normalized dimensionless resistance, Q -CPT, and the mean effective diameter, D (in mm), using a data set of different uncemented soils of Holocene age accumulated at various sites in North America, Europe, and Asia. The V - Q data exhibit different trends with respect to grain sizes. For soils with mean grain size ( D ) < 0.2 mm, the V / Q ratio undergoes a significant reduction with the increase in D of the soil. This trend is completely reversed with further increase in D ( D > 0.2 mm). These results corroborate earlier results that stressed the use of different CPT-based correlations with different soil types, and those emphasized the need to impose particle-size limits on the validity of the majority of available correlations. [ABSTRACT FROM AUTHOR]
ISSN:	18611125
DOI:	10.1007/s11440-016-0520-2