Case Histories of Multi-Layer Interface Tests for Composite Liners and Comparison to Single Interface Tests

Thevachandran Shenthan, Kris Khilnani, Timothy D. Stark

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

Abstract

This paper presents multi-layer interface shear test results for composite liner systems from fourteen landfill projects in California. The multi-layer configuration utilizes site-specific materials including low-hydraulic conductivity compacted soil (CSL), geosynthetic materials [geosynthetic clay liner (GCL), geomembrane (GM), drainage geocomposite (GC), and geotextile (GT)], leachate collection and removal system (LCRS) gravel, and/or protective cover soil (PCS), as applicable. This paper describes the test configuration and test procedures to represent field configurations, including soaking and saturation conditions, choice of normal stresses, and California Water Board recommended procedures for calculating shear strengths for encapsulated GCLs. The importance of simulating field conditions is discussed. In addition, a comparison was made between results from single and multi-layer interface tests for two of the projects. This paper also includes a discussion of pros and cons of multi-layer interface tests compared to single interface tests.

Original languageEnglish (US)
Title of host publicationGeotechnical Special Publication
EditorsChristopher L. Meehan, Sanjeev Kumar, Miguel A. Pando, Joseph T. Coe
PublisherAmerican Society of Civil Engineers
Pages331-343
Number of pages13
EditionGSP 306
ISBN (Electronic)9780784482087
ISBN (Print)9780784482087
DOIs
StatePublished - 2019
Externally publishedYes
Event8th International Conference on Case Histories in Geotechnical Engineering: Earth Retaining Structures and Geosynthetics, Geo-Congress 2019 - Philadelphia, United States
Duration: Mar 24 2019Mar 27 2019

Publication series

NameGeotechnical Special Publication
NumberGSP 306
Volume2019-March
ISSN (Print)0895-0563

Conference

Conference8th International Conference on Case Histories in Geotechnical Engineering: Earth Retaining Structures and Geosynthetics, Geo-Congress 2019
Country/TerritoryUnited States
CityPhiladelphia
Period3/24/193/27/19

ASJC Scopus subject areas

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

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