Paper Information

Title: 

MASW AND SFR METHODS FOR DETERMINATION S WAVE VELOCITY PROFILE

Type: PAPER
Author(s): RASANEH GH.,SIAHKOOHI H.R.*
 
 *INSTITUTE OF GEOPHYSICS, UNIVERSITY OF TEHRAN
 
Name of Seminar: CONFRANCE ZHEOFIZIKE IRAN
Type of Seminar:  CONFERENCE
Sponsor:  ANJOMANE MELI ZHEOFIZIK IRAN
Date:  2006Volume 12
 
 
Abstract: 

THE MULTICHANNEL ANALYSIS OF SURFACE WAVES METHOD (MASW) IS A NONDESTRUCTIVE SEISMIC METHOD TO EVALUATE PAVEMENT THICKNESS AS WELL AS TO EVALUATE LINEAR ELASTIC MODULUS OF GROUND AND MATERIALS UNDER PAVEMENT. IT ANALYSIS DISPERSION PROPERTIES OF CERTAIN TYPES OF SEISMIC SURFACE WAVES (FUNDAMENTAL MODE RAYLEIGH WAVES) PROPAGATING HORIZONTALLY ALONG THE SURFACE OF MEASUREMENT DIRECTLY FROM IMPACT POINT TO RECEIVERS. IT GIVES THE SHEAR-WAVE VELOCITY (VS) INFORMATION. WHEN SURFACE WAVE ARE UTILIZED TO DEDUCE A NEAR-SURFACE SHEAR-WAVE VELOCITY (VS) PROFILE (VS VERSUS DEPTH), THE ANALYSIS RELIES ON THE ACCURATE CALCULATION OF PHASE VELOCITIES FOR THE HORIZONTALLY TRAVELING FUNDAMENTAL-MODE RAYLEIGH WAVE. DECOMPOSITION OF A MULTICHANNEL RECORD INTO A TIME VARIABLE-FREQUENCY FORMAT, ALLOW EACH FREQUENCY COMPONENT TO BE SEPARATELY AND CONTINUOUSLY DISPLAYED (SWEPT FREQUENCY RECORD, SFR). SOME EXAMPLES FROM REAL SEISMIC DATA VERIFY THE MASW METHOD DESCRIBED HERE AND SFR METHOD EXTRACTING OF MULTICHANNEL DISPERSION CURVES.

 
Keyword(s): RAYLEIGH WAVE, DISPERSION CURVE, MASW METHOD, SFR METHOD
 
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