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Title:

Characterization of Unknown Foundations Using a 2-D Full Waveform Tomography

Accession Number:

01551305

Record Type:

Component

Availability:

Transportation Research Board Business Office

500 Fifth Street, NW
Washington, DC 20001 United States

Abstract:

The paper presents an application of 2-D time-domain waveform tomography to characterize existing foundations using surface-based seismic wavefields. The full waveform inversion (FWI) technique is based on a finite-difference solution of 2-D elastic wave equations and Gauss-Newton inversion method. Both the compression wave (P-wave) and shear wave (S-wave) velocities are inverted independently and simultaneously to increase credibility of characterized profiles. The FWI technique was applied on both synthetic and real experimental data sets. Inverted results of synthetic data showed that individual embedded foundation elements (piles) and soil between piles were distinguished; supporting soils were characterized. For real experimental data, seismic surface wavefields were measured next to two drilled shafts of 1.2 m diameter and 15 m length, and then inverted by the FWI. The waveform analysis successfully profiled embedded shaft elements and subsurface soil stratigraphy, the shaft length of 15 m is also generally predicted.

Supplemental Notes:

Alternate title: Characterization of Unknown Foundations Using Two-Dimensional Full Waveform Tomography. This paper was sponsored by TRB committee AFS30 Foundations of Bridges and Other Structures.

Monograph Accession #:

01550057

Report/Paper Numbers:

15-1610

Language:

English

Corporate Authors:

Transportation Research Board

500 Fifth Street, NW
Washington, DC 20001 United States

Authors:

Nguyen, Dzung T
Tran, Khiem T
McVay, Michael

Pagination:

14p

Publication Date:

2015

Conference:

Transportation Research Board 94th Annual Meeting

Location: Washington DC, United States
Date: 2015-1-11 to 2015-1-15
Sponsors: Transportation Research Board

Media Type:

Digital/other

Features:

Figures; References

Subject Areas:

Bridges and other structures; Geotechnology; Highways; Maintenance and Preservation; I24: Design of Bridges and Retaining Walls; I42: Soil Mechanics; I61: Equipment and Maintenance Methods

Source Data:

Transportation Research Board Annual Meeting 2015 Paper #15-1610

Files:

TRIS, TRB, ATRI

Created Date:

Dec 30 2014 12:36PM