Assessment of Combined Effect of Installation Damage and Creep Deformation of Geogrids

지오그리드의 시공 시 손상 및 크리프 변형의 복합효과 평가

  • 조삼덕 (한국건설기술연구원 지반연구부) ;
  • 이광우 (한국건설기술연구원 지반연구부) ;
  • 오세용 (한국건설기술연구원 지반연구부) ;
  • 이도희 (대우건설 경의선 전동차 사무소)
  • Published : 2005.07.01


A series of installation damage tests and creep tests are performed to assess the combined effect of installation damage and creep deformation far the long-term design strength of geogrid reinforcement. Three types of geogrids are used to investigate the influence of the geogrid types. From the experimental results, it is shown that installation damage and creep deformation of geogrids significantly depends on the polymer types of the geogrids and the larger the installation damage, the more the combined effect of installation damage and creep deformation. In addition, The results of this study show that the tensile strength reduction factor, RF, considering the combined effect between installation damage and creep deformation is less than that calculated by the current design practice which calculates the long-term design strength of geogrids damaged during installation by multiplying two partial safety factors, $RF_{ID}$ and $RF_{CR}$.


  1. Cazzuffi, D., Mongiovi, L. & Torresendi, M.. (2001), 'Laboratory and Field tests for the Evaluation of Installation Damage of Geosynthetics in Reinforced Earth Structures', 15th ICSMGE, Istanbul, pp.1565-1568
  2. EN ISO 10319(1993), International Organization for Standardization. Geotextiles:Wide-width tensile test, International Organization for Standardization
  3. Jeon, H.Y., Kim, S.H., & Yoo, H.K. (2002), 'Assessment of long-term performances of polyester geogrids by accelerated creep test', Polymer Testing 21, pp.489-495
  4. Sawicki, A. (1999), 'Creep of Geosynthetic Reinforced Soil Retaining Walls', Geotextiles and Geomembranes 17, pp.51-65
  5. FHWA (1996), Corrosion/Degradation of Soil Reinforcements for Mechanically Stabilized Earth Walls and Reinforces Soil Slopes, FHWA Publication No. FHWA-SA-96-072, Federal Highway Administration, Washington, D.C
  6. Pinho-Lopes, M., Recker, C., Lopes, M.L. & Muller-Rochholz, J. (2002), 'Experimental Analysis of the Combined Effect of Installation Damage and Creep of Geosynthetics - New Results', Geosynthetics-7th ICG-Delmas, pp.1539-1544
  7. ASTM D 5818 (1995), Annual Book ASTM Standards. Standard Practices for Obtaining Samples of Geosynthetics from a Test Section for Assessment of Installation Damage, American Society for Testing and Materials
  8. Kaliakin, V.N. & Dechasakulsom, M. (2002), 'Development of General Time-Dependent Model for Geogrids', Geosynthetics International, Vol.9, No.4, pp.319-344
  9. Austin, R.A. (1997), 'The Effect of Installation Activities and Fire Exposure on Geogrid Performance', Geotextiles and Geomembranes 15, pp.367-376
  10. GRI (1995), Determination of the Long-Term Design Strength of Flexible Geogrids, GRI Test Methods GG4(b), Drexel University, USA
  11. BS 8006 (1995), British Standard Institution. Code of Paractice for Strengthened/Reinforced Soils and other Fills, British Standard Institution
  12. Greenwood, J.H. (2002), 'The Effect of Installation Damage on the Long-Term Design Strength of a Reinforcing Geosynthetic', Geosynthetics International, Vol.9, No.3, pp.247-258
  13. Watn, A. and Chew, S.H. (2002), 'Geosynthetic Damage - from Laboratory to Field', Geosynthetics-7th ICG-Delmas, pp.1203-1226
  14. Vinogradov, G.V. and Malkin, AYa. (1980), 'Rheology of Polymers; Viscoelasticity and Flow of Polymers', Mir Publishers Moscow Springer-Verlag Berlin Heidelberg New York, pp.74-82
  15. Takaku, A. (1980), 'Effect of Temperature on Creep Fracture of Polypropylene Fibers', Journal of Apllied Polymer Science, 25, pp.1861-1866
  16. PWRC (2000), ジオテキスタイルを用いた補强土の設計.施工マニュアル(改訂版), 日本 土木硏究センター