Please use this identifier to cite or link to this item:
https://hdl.handle.net/11681/6146| Title: | In situ seismic investigation of liquefaction potential of soils |
| Authors: | Rechtien, Richard D. |
| Keywords: | Biot model Biot theory Soil mechanics Liquefaction Seismic Tomography Seismic refraction method Soil liquefaction Shear waves |
| Publisher: | Geotechnical Laboratory (U.S.) Engineer Research and Development Center (U.S.) |
| Series/Report no.: | Contract report (U.S. Army Engineer Waterways Experiment Station) ; GL-96-1. |
| Description: | Contract Report Abstract: This report examines the use of exploratory seismic technology as a tool for measurement of in situ liquefaction potential of saturated, cohesionless soils. Past applications of seismic technology have focused principally on shear velocity as a liquefaction indicator. Inherent in these applications was the assumption of a nonporous, perfectly elastic media; the theory of which provides simple procedures for conversion of combined measurements of distance and travel time to "shear velocity." This property, dependent on shear modulus and density of a perfectly elastic solid, is all that can be produced experimentally because of the simplicity of the assumed earth model used as basis for interpretation. All interpretive geophysical approaches require use of conceptual earth models. For the liquefaction problem, the key to success is choice of a model that incorporates dynamic attributes of fluid-saturated, noncohesive sediments. A Biot model, modified to include fracture porosity and permeability, is proposed as a proper choice. Consequently, assignment of combinations of measured particle motion attributes to earth model parameters must be reevaluated in light of the Biot theory. A field experiment is proposed with the Biot model and waveform tomography in mind. This experiment embodies concepts relative to current and future data processing capabilities. |
| Rights: | Approved for public release; distribution is unlimited. |
| URI: | http://hdl.handle.net/11681/6146 |
| Appears in Collections: | Contract Report |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| CR-GL-96-1.pdf | 8.91 MB | Adobe PDF |  View/Open |