Evaluation of Installation Damage According to Simulated Installation Test Conditions and Creep Deformation of Geosynthetic Reinforcements
Vol. 58, No. 4, pp. 207-213,
Aug. 2021
10.12772/TSE.2021.58.207
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Abstract
In this study, a total of six geosynthetic reinforcements, including five geogrid
types (design strengths of 4, 6, 8, 10, and 15 ton/m) and a woven geotextile (design
strength of 4 ton/m) were used to simulate the degree of damage according to the installation
damage test conditions, and property evaluation by creep deformation was performed.
The degree of installation damage during the construction period of the
geosynthetic samples was tested in accordance with ISO 10722:2019, and soil structure
compaction was performed with fill thicknesses of 20, 30, 40, 60, 80, and 100 cm. After the
installation damage test, geosynthetic samples were removed, and the tensile strength
before and after the installation damage test was compared by applying a wide tensile
strength test (ASTM D 4595). Jumunjin standard sand was used as the filling material and
after a soil compaction installation damage test, the tensile strength of the reinforcing geosynthetic
sample decreased by 2−30% overall, and the reduction factor owing to installation
damage was calculated by comparing the tensile strength before and after installation
damage testing. The GRI GS-10 test method was used to evaluate the creep deformation at
10 000 h, and the GRI GG-4 method was used to determine the reduction coefficient owing
to creep deformation. From the creep test, it was found that the creep strain of the damaged
geosynthetic sample by filling depth under the same load conditions was approximately
1−2% higher than that of the undamaged sample.
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