Fast Determination of Soil Behavior in the Capillary Zone Using Simple Lab Tests

Abstract and project information last updated: 12 March 2013. Project updates are dated below.

AUTC
Project
Number
410025
Principal
Investigator
Xiong Zhang (UAF)
xzhang11@alaska.edu
Funding
Agency

US Department of Transportation (RITA)

Texas A&M University

Project
Budget
286985
Start
Date
20 July 2010
Estimated
End Date
15 August 2012

Abstract

Frost heave and thaw weakening are typical problems for engineers building in northern regions. These unsaturated-soil behaviors are caused by water flowing through the capillary zone to a freezing front, where it forms ice lenses. Although suction-controlled tests are the standard for characterizing unsaturated soils, such testing is too laborious, time-consuming, and costly for routine engineering projects. Characterizing the stress/strain behavior for only one unsaturated soil can take up to three years, and moisture content measurements are unreliable. This research team seeks to develop a method for rapidly determining and analyzing unsaturated soil behavior through a new approach, the Modified A shake table model of a single pipe embedded in a frozen silt layer overlying a liquefiable sand layer adjacent to a river channel. In these experiments, the loads induced on the bridge foundations by unfrozen and frozen ground crust will be measured from two shake table tests by means of strain gauges. State Surface Approach. The MSSA can potentially reduce the time required to characterize unsaturated soils to a few weeks, as well as provide more reliable measurements and more representative soil behavior. If successful, this research will produce a useful tool for geotechnical engineers, allowing fast, practical, and more comprehensive soil characterization for more complicated soil behavior problems.

Final Report

Fast Determination of Soil Behavior in the Capillary Zone Using Simple Laboratory Tests
28 Jan 2014

Fast Determination of Soil Behavior in the Capillary Zone Using Simple Laboratory Tests
Lin Li, Dr. Xiong Zhang, Dr. Robert Lytton
Fast-Determination-of-Soil-Behavior.pdf

Related Project Activity

28 January 2014

Fast Determination of Soil Behavior in the Capillary Zone Using Simple Laboratory Tests

by

Fast Determination of Soil Behavior