Browse > Article
http://dx.doi.org/10.7843/kgs.2007.23.4.25

A Study of the Measurement of Nonwoven Geotextile Deformation with Strain Gauges  

Won, Myoung-Soo (Dept. of Civil Engrg., Kunsan National Univ.)
Kim, You-Seong (Dept. of Civil Engrg., Chonbuk National Univ.)
Kim, Hyeong-Joo (Dept. of Civil Engrg., Kunsan National Univ.)
Park, Byung-Soo (Dept. of Civil Engrg., Gangwon Provincial College)
Publication Information
Journal of the Korean Geotechnical Society / v.23, no.4, 2007 , pp. 25-32 More about this Journal
Abstract
Because of the increasing use of clayey soil as the backfill in reinfurced soil structures and embankments, nonwoven geotextiles of drain capability have been receiving much attention. However, there are few studies on the deformation behavior analysis of nonwoven geotextiles in reinforced soil structures in the site because nonwoven geotextiles which have low tensile stiffness and higher deformability than geogrids and woven geotextiles, are difficult to measure their deformation by using strain gauges. In this study, it was suggested that a new and more convenient method could measure the deformation behaviour of nonwoven geotextile using a strain gauge and examine the availability of the method by conducting laboratory tests and applying to two geosynthetics reinforced soil (GRS) walls in the site. The result of wide-width tensile test conducted under confining pressure of 70 kPa shows that the local deformation of nonwoven geotextile to be measured with strain gauges has a similar pattern to the total deformation measured with LVDT. In the GRS walls, nonwoven geotextile shows a larger deformation range than the woven geotextile and geogrid. However, the deformation patterns of these three reinforcement materials are similar. The function of strain gauges attached to nonwoven geotextile in the walls works normally for 16 months. Therefore, the method proposed in this study for measuring nonwoven geotextile deformation using a strain gauge has proved useful.
Keywords
Geosynthetics reinforced soil wall; Nonwoven geotextile; Reinforced soil; Strain; Strain gauge;
Citations & Related Records
연도 인용수 순위
  • Reference
1 조삼덕, 이광우, 이훈연, 장기수 (2005), '2단 고성토 보강토옹벽의 거동평가 사례연구', 한국토목섬유학회 가을 학술발표회, pp.95-102
2 Huang, C-C. (1998), 'Investigation of the local strains in a geosynthetic composite', Geotextiles and Geomembranes, Vol.16, pp.175-193   DOI   ScienceOn
3 Lechchinsky, D.. and Fowler, J. (1990), 'Laboratory measurement of load-elongation relationship of high-strength geotextiles', Geotextiles and geomembranes, 9(2), pp.145-164   DOI   ScienceOn
4 김진만, 오세용, 이대영, 최봉혁 (2005), '지오그리드를 이용한 보강사면의 현장 계측 연구', 대한토목학회 정기학술대회, 생토공학, pp.1282-1286
5 Boyle, S.R. (1995), Deformation prediction of geosynthetic reinforced soil retaining walls, PhD. dissertation, University of Washington, U.S.A. pp.391
6 유충식, 정혁상 (2004), '.계단식 형태의 실대형 블록식 보강토 옹벽의 거동', 대한토목학회논문집, 제24권 제4-C호, pp.213-222
7 유충식, 김선빈, 이봉원 (2005), '보강토구조물의 장기거동(실험 및 현장계측)', 한국토목섬유학회 가을 학술발표회, pp.147-156
8 김유성, 원명수 (2001) '토목섬유 보강재의 평가기법에 관한 실험적 고찰', 대한토목학회논문집, 제21권 제3-C호, pp.243-255
9 Koerner, R.M. (1996), 'The state-of-the-practice regarding in-situ monitoring of geosynthetics', Proc. 1st European Geosynthetics Conference, Netherlands, pp.77-86
10 Sluimer, G.. and Risseeuw, P. (1982), 'A strain-gauge technique for measuring deformation in geotextile', Proc. 2nd Internat. Conf. on Geotextiles, Las Vegas, USA, pp.835-838