Compacted soil liner interface strength importance

Timothy D. Stark, Hangseok Choi, Chulho Lee, Brian Queen

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)


This paper describes an interesting slope failure in a liner system of a municipal solid waste containment facility during construction because the sliding interface is not the geomembrane (GM)/compacted low-permeability soil liner (LPSL) but a soil-soil interface within the LPSL. Some of the lessons learned are as follows: (1) compaction of the LPSL should ensure that each lift is kneaded into the lower lift so a weak interface is not created in the LPSL; (2) the LPSL moisture content should be controlled so it does not exceed the specified value, for example 3-4% wet of optimum, because it can lead to a weak interface in the LPSL; (3) drainage material should be placed over the GM from the slope toe to the top to reduce the shear stresses applied to the weakest interface; and (4) equipment should not move laterally across the slope if it is unsupported but up the slope while placing the cover soil from bottom to top.

Original languageEnglish
Pages (from-to)544-550
Number of pages7
JournalJournal of Geotechnical and Geoenvironmental Engineering
Issue number4
Publication statusPublished - 2012 Apr 17


  • Compacted soil liner
  • Geomembranes
  • Geosynthetic lined slopes
  • Geosynthetics
  • Interface shear strength
  • Landfills
  • Slope stability

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology
  • Environmental Science(all)


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