Presented by Iraj Noorany, Ph.D, GE
Presented by: Iraj Noorany , Ph.D, GE
Many structural fills and embankments are composed of expansive soils.
Water from landscape irrigation, precipitation and subsurface seepage can gradually infiltrate the fill and cause both vertical movement and lateral expansion of the fill slope zone.
The mechanism of heave, hydrocompression and lateral extension of compacted fills and the types of resulting distress features will be briefly reviewed.
The latest ASTM test standard for one-dimensional wetting-induced volume change will be reviewed, and the triaxial test procedure for measuring vertical and lateral wetting-induced strains on anisotropically loaded specimens will be discussed.
The presentation will then focus on the step-by-step procedure, "LFE Method", for calculating the amounts of heave/settlement and lateral fill extension as a function of the slope's geometry, the soil's vertical and lateral swell-collapse characteristics, percentage of oversize, depth of wetting and degree of wetting.
Mitigation of the effects of lateral extension of slopes will be briefly discussed.
Fellow of ASCE, Iraj Noorany is Emeritus Professor of Civil Engineering, San Diego State University and a Visiting Professor at the University of California, San Diego.
He received his Ph.D. in geotechnical engineering from UC Berkeley, and is a licensed GE with extensive consulting experience in Northern and Southern California.
research and publications have focused on the strength and compressibility of soils, offshore geotechnical engineering, and behavior of compacted fills and fill slopes.
has received a number of teaching and professional awards.