Browse > Article
http://dx.doi.org/10.7843/kgs.2008.24.5.129

The Effect of Pile Distallation on the Reduction of Cumulative Plastic Settlement  

Lee, Su-Hyung (Track and Civil Eng. Dept., Korea Railroad Research Institute)
Lee, Il-Wha (Track and Civil Eng. Dept., Korea Railroad Research Institute)
Lee, Sung-Jin (Track and Civil Eng. Dept., Korea Railroad Research Institute)
Kim, Dae-Sang (Track and Civil Eng. Dept., Korea Railroad Research Institute)
Publication Information
Journal of the Korean Geotechnical Society / v.24, no.5, 2008 , pp. 129-137 More about this Journal
Abstract
An active application of concrete track is being expected far the future constructions of Korean railroad. In comparison with the existing ballasted tract, a concrete track is very susceptible for the settlement, since its rehabilitation requires much time and cost. When a concrete track is constructed on fine-grained subgrade soil, excessive cumulative plastic settlements due to repetitive train road may occur. In this case, the settlement of the concrete track may be effectively reduced by installing a small number of small-diameter piles beneath the track. This paper presents the effect of pile installation on the reduction of cumulative plastic settlement of concrete track. A method combining experiential equation and numerical method is proposed. Using an existing experiential equation and the estimated earth pressure distribution, the cumulative plastic strain was calculated. From the results, it is verified that the effects of the pile installation is significant to effectively reduce the cumulative plastic settlement of concrete track. The reduction effects of the cumulative plastic settlement according to the pile number and pile arrangement are presented.
Keywords
Concrete track; Cumulative plastic settlement; Experiential equation; Fine-grained subgrade; Finite difference method; Pile;
Citations & Related Records
연도 인용수 순위
  • Reference
1 김홍택,강인규,황정순,전웅진,고용일(1999),"유전자 알고리 즘을 이용한 Piled Raft 기초의 최적설계", 한국지반공학회 '99 가을학술발표회, pp.415-422
2 Baladi, G. Y., Vallejo, L. E. and Goitom, T. (1983), "Normalized characterizaion model of pavement materials", ASTM special technical publication 807, ASTM, pp.55-64
3 Hyde, A. F. L. and Brown, S. F. (1976), "The plastic deformation of a silty clay under creep and repeated loading", Geotechnique, 26(1), pp.173-184   DOI   ScienceOn
4 Burland, J. B., Broms, B. B. and De Mello, V. F. B. (1977), "Behaviour of Foundations and Structures", Proc. 9th Int. Conf. Soil Mech. Found. Engng, Tokyo, Vol.2, pp.495-546
5 Itasca Consulting Group Inc. (1997), "FLAC3D Manual: Fast Lagrangian Analysis of Continua in 3 Dimensions, Version 2.0", Itasca Consulting Group Inc., Minnesota, USA
6 Monismith C. L., Ogawa, N., and Freeme, C. R. (1975), "Permanent deformation characteristics of subgrade soils due to repeated loading", Transp. Res. Rec., No. 537, pp.1-17
7 Li, D. and Selig, E. T. (1996), "Cumulative plastic deformation for fine-grained subgrade soils", J. Geotech Engrg., ASCE, 124(4), pp.316-322
8 Tan, Y. C., Chow, C. M. and Gue, S. S. (2004), "Piled Raft with Short Piles for Low-Rise Buildings on very Soft Clay", 15th SEAGC, Bangkok
9 Bowles, J. E. (1988), "Foundation Analysis and Design". 4th edition, McGraw-Hill
10 Sommer, H., Tamaro, G. and De Benedicttis, C. (1991), "Messes Turm, Foundations for the Tallest Building in Europe", Proceeding 4th International Deep Foundation Institute Conference, Stressa, 1991, pp.139-145
11 Horikoshi K and Randolph M. F. "Centrifuge modeling of piled raft foundation on clay", Geotechnique 1996; 46(4); 741-752   DOI   ScienceOn
12 Kim, K, Lee, S-H, Kim, K-S, Chung C-K, Kim, M. and Lee, H. (2002), "Optimum Pile Arrangement for Minimizing Differential Settlements in Piled Raft Foundation", Computers and Geotechnics Vol.28, pp.235-253