Geotechnical Engineering Evaluation of Superficial Deposits Utilizing Seismic Methods at Al al-Bayt University, Jordan

  • Fatima K. Ghanem Department of Earth and Environmental, University of Al al-Bayt, Mafraq, Jordan
  • Hani Al Amoush Department of Earth and Environmental, University of Al al-Bayt, Mafraq, Jordan
  • Eid Al-Tarazi Department of Earth and Environmental Sciences, University of the Hashemite, Zarqa’a, Jordan
Keywords: Elastic moduli, Geotechnical parameters, Multi-channel analyses shear wave, seismic refraction tomography, superficial deposits

Abstract

Integration of seismic refraction tomography and multi-channel analyses shear wave methods were used at Al al-Bayt university campus in Mafraq, NE Jordan to delineate the shallow subsurface layering and determine their geotechnical properties, in addition, to estimate the geotechnical engineering parameters of the superficial deposits for detailed purposes. The P-wave refraction velocities were found to range from 180 to 2300 m/s for the three identified layers which indicating superficial soil deposits with an increasing degree of compaction with depth. The S-wave velocities were found to lie in a narrow velocity range (250 to 600 m/s), which badly resolved the subsurface layering. Moreover, four soil samples were taken from the sites of seismic survey points for density calculations. The average calculated density was found to be 1.85 g/cm3. Two soil samples from nearby seismic profile-1 and seismic profile-4 were tested for geotechnical properties. The results showed that the seismic method is an effective tool to estimate the different elastic moduli; Poisson's ratio, Young's modulus, Bulk modulus, Shear modulus, Lame's constants, and geotechnical engineering parameters; N-value, bearing capacity, material index, concentration index, and stress ratio of the superficial soil deposits. The study recommends conducting a detailed geophysical study before starting any type of geoengineering construction in the area.

Author Biography

Eid Al-Tarazi, Department of Earth and Environmental Sciences, University of the Hashemite, Zarqa’a, Jordan

Professor, Faculty of Natural Resources and Environment, Hashemite University, Zarqa’a, Jordan.

Published
2021-04-27