HR: 08:45h
AN: NS21A-04    [Abstracts]
TI: Simultaneous ReMi and MSASW Technique
AU: * Stovall, S P
EM: spstovll@memphis.edu
AF: Department of Civil Engineering, The University of Memphis, Engineering Science Bldg Room 104,3795 Central Ave., Memphis, TN 38152, United States
AU: Pezeshk, S
EM: spezeshk@memphis.edu
AF: Department of Civil Engineering, The University of Memphis, Engineering Science Bldg Room 104,3795 Central Ave., Memphis, TN 38152, United States
AB: This paper discusses a procedure to estimate shear wave velocity of a soil profile using a simultaneous Refraction Microtremor (ReMi) and Multi-channel Spectral Analysis of Surface Waves (MSASW) technique. MSASW and ReMi differ fundamentally in their recorded source signal type. MSASW is an active-source technique requiring signal from swept vibratory signal such as Vibroseis to generate surface waves. Vs profile is obtained from the Raleigh wave field generated by the source. Conversely, ReMi is a passive technique, recording ambient noise or microtremors being present in an urban environment. The shear wave velocity profile is obtained by identifying the fundamental mode Raleigh wave field within the microtremors. Advantage of using a simultaneous ReMi and MSASW technique is that one can obtain a much more accurate dispersion curve. This in turn will result in more accurate estimation of shear wave velocity. This paper will discuss the technique and will provide several experimental site results.
DE: 0994 Instruments and techniques
SC: Near-Surface Geophysics [NS]
MN: 2007 Fall Meeting