Geosynthetic Reinforced Soil (GRS) structures brought significant improvement in the engineering behavior of soil structures and spread to countries throughout the world in recent decades. GRS structures use simpler construction techniques, tolerate more differential settlement, exhibit better seismic performance, and provide greater ductility and safety than conventional soil structures.
The Federal Highway Administration (FHWA) conducted performance tests that validated their guidance for soil reinforced with geosynthetic sheets. In contrast, this thesis investigates capacity and deformation of soil reinforced with geosynthetic strips. While comparing strip-GRS with sheet-GRS, this research focuses on the mechanics of coherence, providing both the analysis and the laboratory tests for validation. The meaning of “coherence” as granular stability is taken from the 1987 report by Mitchell and Villet that pioneered reinforced soil in America, but its meaning is also associated with “jammed,” a word now commonly used among practitioners of the discrete element method.
The strip-GRS research of this dissertation is part of a larger effort of this university to derive analytical methods for reinforced soil structures where only empirical methods had been available previously. Fortuitously, the results of this completed research are now relevant to a discussion that began at the international congress (19th ICSMGE) in September 2017. In that discussion, which hopes to extrapolate to standard practice from a few field measurements, the industry glimpses the feasibility and benefits of soil structures reinforced with geosynthetic strips.
|Advisor:||Hoffman, Peter, Znidarcic, Dobroslav|
|Commitee:||Chang, Nien-Yin, Dashti, Shideh, Vega, Rafael Sanchez|
|School:||University of Colorado at Denver|
|School Location:||United States -- Colorado|
|Source:||DAI-B 80/04(E), Dissertation Abstracts International|
|Subjects:||Engineering, Civil engineering|
|Keywords:||Coherence of soil, Deformation, Geosynthetic reinforced soil, Geosynthetic sheets, Geosynthetic strips, Strip-GRS|
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