Effect of suffusion on mechanical characteristics of sand

Nathan Shwiyhat, Ming Xiao

Research output: Chapter in Book/Report/Conference proceedingConference contribution

13 Citations (Scopus)

Abstract

The mechanical characteristics of earth dams and levees, such as settlement, permeability, and strength, can be affected by internal erosion in the forms of piping and suffusion. This paper reports a preliminary experimental study on the changing mechanical characteristics (permeability, consolidation) with the progression of suffusion of a sandy soil. The internal erosion tests are conducted using a triaxial apparatus. The pedestal of the triaxial cell is modified to allow seepage and eroded soil particles to exit the specimen into an effluent tank. The seepage is induced in the specimen by controlled constant hydraulic gradient. The eroded soils are collected in the effluent tank so that the erosion rate and extent can be measured. Variations of the specimen's permeability and volume during the erosion are recorded. With approximately 5.5% fines in the sand, the test suggests that suffusion can occur and cause soil settlement. Suffusion of finer particles may also clog the downstream soil layer and results in permeability reduction. Suffusion and volume reduction gradually diminish relatively quickly to an un-measurable level after 4hr of seepage through the soil under a hydraulic gradient of approximately 20.

Original languageEnglish (US)
Title of host publicationScour and Erosion
Pages378-386
Number of pages9
Edition210 GSP
DOIs
StatePublished - Dec 1 2010
Event5th International Conference on Scour and Erosion - San Francisco, CA, United States
Duration: Nov 7 2010Nov 10 2010

Other

Other5th International Conference on Scour and Erosion
CountryUnited States
CitySan Francisco, CA
Period11/7/1011/10/10

Fingerprint

Sand
permeability
seepage
Soils
sand
Erosion
Seepage
erosion
soil
effluent
hydraulics
earth dam
Effluents
piping
erosion rate
Hydraulics
sandy soil
consolidation
Embankment dams
Levees

All Science Journal Classification (ASJC) codes

  • Geotechnical Engineering and Engineering Geology
  • Civil and Structural Engineering
  • Building and Construction
  • Architecture

Cite this

Shwiyhat, N., & Xiao, M. (2010). Effect of suffusion on mechanical characteristics of sand. In Scour and Erosion (210 GSP ed., pp. 378-386) https://doi.org/10.1061/41147(392)36
Shwiyhat, Nathan ; Xiao, Ming. / Effect of suffusion on mechanical characteristics of sand. Scour and Erosion. 210 GSP. ed. 2010. pp. 378-386
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Shwiyhat, N & Xiao, M 2010, Effect of suffusion on mechanical characteristics of sand. in Scour and Erosion. 210 GSP edn, pp. 378-386, 5th International Conference on Scour and Erosion, San Francisco, CA, United States, 11/7/10. https://doi.org/10.1061/41147(392)36

Effect of suffusion on mechanical characteristics of sand. / Shwiyhat, Nathan; Xiao, Ming.

Scour and Erosion. 210 GSP. ed. 2010. p. 378-386.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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