Empirical correlation between shear wave velocity and the N value of the standard penetration test in sandy soils of Juliaca city - Peru

Alata J.; Zevillanos W.; Durán G. · Proceedings of the LACCEI international Multi-conference for Engineering, Education and Technology (2020) · DOI: 10.18687/laccei2020.1.1.392

Resumen

The application of the standard penetration test (SPT) is of a high level of detail, delayed and expensive, requires skilled labor for its execution, and its use in sandy soils, restrictive in fine and plastic soils is recommended and not recommended in the other types. While in the multichannel analysis of surface waves (MASW) its execution is not restrictive, and allows to cover large areas in a short time, however, because it is an indirect method, its approximation must be verified by drilling, obtaining samples, and others high analysis criteria as appropriate. With the implementation and improvement of soil prospection techniques in recent years, relationship studies have been carried out between both trials with different parameters. An empirical correlation between the SPT tests was carried out by means of the number of penetration resistance strokes (N)60 as with the MASW test by means of the cutting wave velocities (Vs) in the sandy soils at 30 points in the city from Juliaca-Peru. There were 106 ordered pairs of data (N60; Vs); by means of the potential regression analysis the equation was obtained Vs = 83.505*N60^0.249; of the coefficient of determination R^2: 0.66 it was determined that the correlation is acceptable. The comparison was made with the correlation equations reported in the literature indicating that the proposed equation was in a trend consistent with them.

Instituciones: Universidad Peruana de Ciencias Aplicadas