News Article

Stability and Stress-Deformation Analyses of Reinforced Slope Failure at Yeager Airport

James G. Collin, Ph.D., P.E., D.GE, F.ASCE; Timothy D. Stark, Ph.D., P.E., D.GE, F.ASCE; Augusto Lucarelli, M.ASCE; Thomas P. Taylor, Ph.D., P.E., D.GE, F.ASCE, and Ryan R. Berg, P.E., D.GE, F.ASCE

Journal of Geotechnical and Geoenvironmental Engineering, Vol. 147, Issue 3 (March 2021), American Society of Civil Engineers

Abstract

This paper describes the material properties along with the inverse limit-equilibrium and permanent deformation analyses used to investigate the 2015 reinforced slope failure at the Yeager Airport near Charleston, West Virginia. Inverse two-dimensional (2D) limit-equilibrium analyses were first performed to evaluate laboratory-derived strength parameters, slope geometry, and soil reinforcement configuration that would reproduce the observed critical failure surface. Because of the shape of the reinforced soil slope (RSS) (outside radius), the impact of the direction of the uniaxial geogrid reinforcement, varying from parallel to almost perpendicular to the direction of sliding, was analyzed using a three-dimensional (3D) limit-equilibrium analysis. Finite-difference permanent deformation analyses were also conducted to understand the internal stresses and deformations of the RSS prior to failure and kinematics of the slope failure. The results of these various analyses are consistent with postfailure field observations and demonstrate the value of performing multiple types of analyses, e.g., 2D and 3D limit-equilibrium and permanent deformation analyses, when analyzing a complex slope failure.

This paper is accessible here: https://ascelibrary.org/doi/abs/10.1061/(ASCE)GT.1943-5606.0002454.

Stage 4a failure mechanism using FLAC3D.
Latest News
  • Stability and Stress-Deformation Analyses of Reinforced Slope Failure at Yeager Airport This paper describes the material properties along with the inverse limit-equilibrium and permanent deformation analyses...
    Read More
  • Computers and Geotechnics: Scott Sloan Best Paper Award for 2019 Itasca is pleased to congratulate Dr. Branko Damjanac and Dr. Peter A, Cundall for their...
    Read More
  • Introducing Our New IMASS Constitutive Model The Itasca Constitutive Model for Advanced Strain Softening (IMASS) has been developed to represent the...
    Read More

Upcoming Events
19 Jan
Evaluation of impacts of lahars on structures using DEM numerical modelling
Lahars represent natural phenomena that can generate severe damage in densely populated urban areas. The evaluation of pressures genera... Read More
21 Jan
Griddle Version 2.0 has been Released | Learn What's New
Griddle 2.0 Has Been Released! Join us for a webinar on "What's New in Griddle 2.0?"... Read More
8 Mar
FLAC3D 2021 Online, Live Introductory Training
Three days of general feature training addressing basic concepts and recommended procedures for geotechnical numerical analysis.... Read More