Journal article

Progressive Internal Erosion in a Gap-Graded Internally Unstable Soil: Mechanical and Geometrical Effects

Amirhassan Mehdizadeh, Mahdi M Disfani, Robert Evans, Arul Arulrajah

INTERNATIONAL JOURNAL OF GEOMECHANICS | ASCE-AMER SOC CIVIL ENGINEERS | Published : 2018

Abstract

This paper investigates the posterosion geomechanical behavior of internally unstable granular material due to removal of fines caused by erosive forces of water flow. Posterosion undrained behavior of a gap-graded internally unstable soil was investigated for a range of erosion durations and inflow velocities using a triaxial-erosion apparatus. Test results indicated that the undrained behavior of the original specimen changed from a strain hardening behavior to a flow-type behavior with limited deformation after internal erosion. The initial peak strength improved and the flow potential decreased during the initial stage of erosion. This observed increase in initial peak strength is believ..

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