Book chapter
Laboratory Pullout Equipment for Testing Soil-Geosynthetic Interface for Reinforced Flexible Pavement Design
Geo-Congress 2014, pp 2543-2557
2014
Abstract
Pullout tests for geosynthetics were developed to support the design of MSE walls to calculate maximum force required for internal stability calculation. In this case, the stability of the system at ultimate or limit state was of concern, and results were reported in terms of coefficient of interaction (Ci) for a given geosynthetic and soil interface. However, to quantify the performance of geosynthetics used in flexible pavements, the soil-geosynthetic interface characteristics at low displacement magnitude is important. An analytical model assesses the performance of soil-geosynthetic interaction, and a new parameter to quantify soil-geosynthetic interaction (KSG1) was defined. This parameter is a function of yield shear stress and confined stiffness of the geosynthetic, which can be obtained from a pullout test. The quantification of this new parameter required test equipment that would be able to define the low displacement behavior of soil-geosynthetic interfaces. However, the conventional pullout box available in most laboratories is capable of predicting the ultimate pullout force as required for MSE wall design, which requires long testing times. To reduce the testing times and to predict the soil-geosynthetic interface characteristics at low displacements, new pullout test equipment was developed that allows testing geosynthetics for reinforced pavement application at low displacement magnitudes. This paper describes the development of new pullout test equipment and discusses the interpretation of test results for a planar geosynthetic specimen to calibrate the proposed parameter based on the analytical model. Finally, the effect of geosynthetic orientation in the pullout equipment on the model parameters and its implication on design of reinforced pavements is discussed.
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1 citations in Scopus
Details
- Title
- Laboratory Pullout Equipment for Testing Soil-Geosynthetic Interface for Reinforced Flexible Pavement Design
- Creators
- Robert H Swan, JrRanjiv GuptaJorge G ZornbergRicha Gupta - Pharmacology and Physiology
- Publication Details
- Geo-Congress 2014, pp 2543-2557
- Resource Type
- Book chapter
- Language
- English
- Academic Unit
- Pharmacology and Physiology; Civil, Architectural, and Environmental Engineering
- Scopus ID
- 2-s2.0-84906840194
- Other Identifier
- 991019173582704721