TY - GEN
T1 - An appraisal of a new generation of surface wave techniques at a test site in florida
AU - Jiang, Pengxiang
AU - Tran, Khiem T.
AU - Hiltunen, Dennis R.
AU - Hudyma, Nick
N1 - Publisher Copyright:
© ASCE 2015.
PY - 2015
Y1 - 2015
N2 - Surface wave techniques for soil characterization have undergone significant development over the past several decades. Herein, a new generation of techniques is compared against traditional methodologies at a test site in Florida. In particular, data from active-source MASW, a new non-uniform active-source array, ReMi, and two dimensional (2D) passive-source arrays are compared. A non-uniform linear array of receivers together with a small vibration shaker significantly improves the resolution of dispersion curves as compared to conventional multi-channel sledgehammer source arrays, particularly at low frequencies. To evaluate dispersion images at the lowest frequencies, passive-source arrays were conducted. Comparing dispersion curves at frequencies that overlapped, the phase velocity estimates from ReMi were low, whereas non-uniform array active-source and 2D passive-source methods produced similar results provided modifications are made to account for near-field effects. Inversion of the combined dispersion curve from a non-uniform active-source array and a 2D passive-source array yielded a significantly deeper shear wave velocity profile for the site than produced in a previous study using dispersion data from a sledgehammer source uniform array and ReMi.
AB - Surface wave techniques for soil characterization have undergone significant development over the past several decades. Herein, a new generation of techniques is compared against traditional methodologies at a test site in Florida. In particular, data from active-source MASW, a new non-uniform active-source array, ReMi, and two dimensional (2D) passive-source arrays are compared. A non-uniform linear array of receivers together with a small vibration shaker significantly improves the resolution of dispersion curves as compared to conventional multi-channel sledgehammer source arrays, particularly at low frequencies. To evaluate dispersion images at the lowest frequencies, passive-source arrays were conducted. Comparing dispersion curves at frequencies that overlapped, the phase velocity estimates from ReMi were low, whereas non-uniform array active-source and 2D passive-source methods produced similar results provided modifications are made to account for near-field effects. Inversion of the combined dispersion curve from a non-uniform active-source array and a 2D passive-source array yielded a significantly deeper shear wave velocity profile for the site than produced in a previous study using dispersion data from a sledgehammer source uniform array and ReMi.
UR - http://www.scopus.com/inward/record.url?scp=84925060906&partnerID=8YFLogxK
U2 - 10.1061/9780784479087.182
DO - 10.1061/9780784479087.182
M3 - Conference contribution
AN - SCOPUS:84925060906
T3 - Geotechnical Special Publication
SP - 1981
EP - 1992
BT - IFCEE 2015 - Proceedings of the International Foundations Congress and Equipment Expo 2015
A2 - Anderson, J. Brian
A2 - Iskander, Magued
A2 - Suleiman, Muhannad T.
A2 - Laefer, Debra F.
T2 - International Foundations Congress and Equipment Expo 2015, IFCEE 2015
Y2 - 17 March 2015 through 21 March 2015
ER -