철도노반 침하저감을 위한 토목섬유 감쌈 쇄석말뚝 설계방안 고찰
A Study on Design Method of Geogrid Encased Stone Colum for Settlement Reduction in Railroad
0
조회
0
다운로드
0
인용
0
참고문헌
키워드
초록
지오그리드 감쌈 쇄석말뚝 공법은 지오그리드의 인장구속효과로 인해 연약지반에 시공된 쇄석말뚝의 지지력을 증가시켜주는 공법이다. 본 연구에서는 토목섬유 감쌈 쇄석말뚝(GESC)공법의 설계에 적용할 수 있는 토목섬유 인장저항력과 극한지지력을 산정할 수 있는 합리적인 설계법을 제안하였다. 제안된 설계방법의 적적성을 평가하기 위해 부산 경전선 연약지반 시험시공 결과로부터 산출된 GESC의 극한지지력과 설계법에의해 산정된 극한지지력을 비교 검증하였다. 연구결과 GESC 설계법에 의해 산정된 지지력이 현장시험의 지지력 보다 크게 나타나는 것으로 검토되었다.
Abstract
The geogrid encased stone column (GESC) system, which increases the confinement effect, has been developed to improve the load carrying capacity of stone columns. The resonable design method for calculating the geogrid ring tension force and ultimate bearing capacity that can be applied to the design of GESC is proposed. In order to calculate design procedure for GESC, two ultimate bearing capacities were compared. One is the ultimate bearing capacity measured using data of the field loading test in light railway site and the other is the ultimate bearing capacity using suggested design procedure of GESC. The results indicated that design method of GESC higher ultimate bearing capacities compared with field loading test.
참고문헌 (15)
- Korea Rail Network Authority, "Design Criteria for Railroad (Road Bed)", ~ (2005)
- Alexiew, D., "Geotextile encased columns (GEC): load capacity, geotextile selection and pre-design graphs", Proceedings of the Geo-Frontiers Conference, pp.497~510 (2005), ASCE
- Han, S. J, "Residual Settlement of trackbed on soft ground Management Program Development", Preceedings of the Railway Conference, pp.49~54 (2012)
- Hughes, J. M, "Reinforcing of Soil Cohesive Soils with Stone Columns", Ground Engineering, 7(3), pp.42~49 (1974)
- Gneil, J, "Improvement of Soft Soils Using Geogrid Encased Stone Columns", Geotextiles & Geomembranes, 27(3), pp.167~175 (2009)
- Kempfert, H. G., "Experiences on Dike Foundations and Land Fills on Very Soft Soils", Proc. Intern. Workshop ISSMGE, Techn. Committee TC 36 Foundation in Difficult Soft Soil Conditions, pp.176~181 (2002)
- 이대영, "지오그리드 보강 Stone Column의 파괴메카니즘 및 지지력 특성 - 축소모형실험을 통한 고찰", 한국지반공학회논문집, 22(10), pp.121~129 (2006), 한국지반공학회
- Lee, D. Y., "Field Load Tests of Geogrid Encased Stone Columns in Soft Ground", Proc., of Eighteenth International Offshore and Polar Engineering Conference, pp.121~131 (2008)
- Lee. D. Y., "An experimental Investigation into Geogrid-Encased Stone Columns in Soft Ground", 박사, pp.2012
- Murugesan, S., "Geosynthetic-Encased Stone Columns : Numerical evaluation", Geotextiles & Geomembranes, 24, pp.349~358 (2006)
- Murugesan, S., "Performance of Encased Stone Columns and Design Guidelines for Construction on Soft Clay Soils", Preceedings of the 4th Asia Regional Conference on Geosynthetids, pp.729~734 (2008)
- Raithel, M, "Calculation Models for Dam Foundations with and Geotextile-Coated Sand Columns", Proc., GeoEngineering 2000 (2000)
- Richard, S., "Rock-steady railway", Public works magazine, ~ (2005)
- Yoo, C, "Numerical Modeling of Geosynthetic-Encased Stone Column", Geosynthetics International, 16(3), pp.116~126 (2009)
- Yoo, C, "Performance of geogrid-encased stone column in soft ground : Full-scale load tests", Geosynthetics International, 19(6), pp.480~490 (2012)