Catalog Record

Data and Report from S&T Project 20081: Internal Erosion: Laboratory Testing to Identify End States in Internally Unstable Soils

The research discussed in this report investigated whether unique limit state conditions exist if internal erosion due to internal instability is allowed to continue to equilibrium, and the applicability of a rigid wall permeameter test to determine these limit state conditions. The research was conducted at the Geotechnical Laboratory and Field Support (GLFS) group of the Bureau of Reclamation’ Technical Service Center (TSC) in Denver, CO by modifying existing equipment and controlling software. Four tests were conducted on a gap graded internally unstable soil. It was determined that internal erosion, if allowed to continue unimpeded, equilibrates to an end state condition resulting in the equilibration of hydraulic conductivity, height (or volume) change, and stress conditions throughout the specimen in a rigid wall permeameter. Further research is needed to better define end state conditions for soils representing dams in Reclamation’s portfolio. The rigid cell permeameter is applicable for determining equilibrium states for hydraulic conductivity and final gradation. A flexible wall permeameter is required to determine the final volume change and mass loss at the end state of internal erosion and the effect of stress conditions on the end state parameters.
Generation Effort S&T Project 20081: Internal Erosion: Laboratory Testing to Identify End States in Internally Unstable Soils
Location Western US
Themes Infrastructure and Assets
Tags Internal Erosion, Internal Stability, Suffosion, Suffusion, Internal Instability
Reclamation Project
Reclamation Program Science and Technology Program

Location Information

Location Name Western US
Location Description The 17 western states of Washington, Oregon, Idaho, Montana, North Dakota, South Dakota, Nebraska, Wyoming, California, Nevada, Utah, Colorado, Kansas, Oklahoma, Texas, New Mexico, and Arizona..
Location Tags Reclamation Domain
Location Parent
State(s) Arizona, California, Colorado, Idaho, Kansas, Montana, North Dakota, Nebraska, New Mexico, Nevada, Oklahoma, Oregon, South Dakota, Texas, Utah, Washington, Wyoming
Unified Region(s) Missouri Basin, Arkansas-Rio Grande-Texas-Gulf, Upper Colorado Basin, Lower Colorado Basin, Columbia-Pacific Northwest, California-Great Basin
Timezone MT
Elevation [ N/A ]
Vertical Datum NAVD88
Coordinates (lat, long) See Location Details
Horizontal Datum WGS84