Multichannel analysis of surface waves (MASW) and microtremor measurements provide a convenient site evaluation of subsurface rocks and soils for geotechnical site investigation. The main target of this work is to assess the geotechnical characteristics of subsurface soil for foundation purposes of a cement factory in Jericho region. MASW was used to delineate the shear wave velocity (V_s) in the proposed site. Six profiles for MASW was performed to measure the V_s for site class evaluation. S-waves were generated using MASW technique with seismograph of 24-channel model SUMMIT X Stream Pro with 2 to 3 m offset distance and three shooting. Fieldwork was undertaken implementing RT Clark vertical geophone of low frequency (4.5 Hz) and SWAN software was used for processing seismic data. Microtremor measurements were carried out at two locations in the study area and Nakamura’s method was applied for determining dominant natural frequency (F_o). Low shear wave velocities (V_s) geoseismic zones were detected ranging between 300-650 m/s, to a moderately high velocities varying between 700-1200 m/s. The values of average S-waves velocity for near-surface geologic units (the top 30 m depth V_s30) show that the majority of foundation sites have a soil profile of class C, making them suitable for engineering design. The results of the microtremor measurements showed a dominant natural frequency (F_o) 7 to 11 Hz. The natural frequencies of the proposed construction (F_b) should not be close to the values of the dominant frequency of the site (F_o) in attempt to avoid the resonance phenomena.

Conference Title

Kazan State University of Architecture and Engineering 75th International Scientific Conference “Sociotechnical construction”

Conference Country

Russia

Conference Date

April 8, 2024 - April 24, 2024

Conference Sponsor

Kazan State University