Determinación de los módulos dinámicos y capacidad portante de los suelos a partir de velocidades sísmicas tipo P y S en depósitos superficiales usando refracción sísmica y MASW.

Abstract

The research focused on determining the dynamic moduli and bearing capacity of soils in superficial deposits using seismic refraction and MASW methods. Seismic refraction allowed for the calculation of the propagation velocities of P and S waves in the subsurface, while MASW analyzed surface waves to obtain shear wave velocity profiles. The study was conducted in a specific area of Girón, Santander, where four lines of 46 meters each were designed in a single terrain to establish the arrangement of geophones and the source. After designing the seismic lines and acquiring the data, they were processed using Geometrics' SeisImager software, resulting in 1D and 2D profiles of the area. The obtained data were used to determine various geotechnical parameters, such as Young's modulus, Poisson's ratio, and soil density, among others. This approach provides an effective tool for evaluating seismic risks and designing structures in areas with superficial deposits, such as the municipality of Girón. Through the profiles obtained from the P and S waves, it was possible to estimate the number of layers, their thicknesses, and the types of material present in the subsurface, along with their respective velocities. Additionally, additional subsurface parameters, such as bearing capacity, Poisson's modulus, stiffness modulus, and density, were determined. These data provided valuable insights into soil characteristics in the study area.