Browse > Article

Design of Pile Foundations Considering Negative Skin Friction  

Kim Ju-Hyong (Korea Institute of Construction Technology)
Kwon Oh-Sung (Technology Research Institute, Daelim Industrial Co., Ltd)
Kim Myoug-Mo (Dept. of Civil, Urban and Geosystem Engng, Seoul National Univ)
Publication Information
Journal of the Korean Geotechnical Society / v.21, no.5, 2005 , pp. 65-74 More about this Journal
Abstract
The negative skin friction on piles, which are installed in currently consolidating soft deposits, creates significant problems on the stability of pile foundations. This study investigated whether or not the pile foundation designs were appropriate in soft deposits with large amount of consolidation settlement. The final settlements of the grounds along the pile depth were estimated by the soil parameters obtained from the laboratory tests and by the field-measured settlement curves, if they were available. The displacement of the piles along the pile depth was estimated by both the load transfer method and the numerical method. Both methods gave similar locations of neutral planes and magnitudes of the maximum axial forces on the piles. The movements of the ground and the piles were compared to calculate the down drag acting on piles. For the piles whose bearing capacities were less than the design loads including the down drag, slip layer coatings and/or incrementing of the pile penetration depth into the bearing stratum were proposed to improve the pile capacities.
Keywords
Consolidation; Negative skin friction; Neutral plane; Pile bearing capacity; Soft deposits;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Barron, R. A. (1948), 'Consolidation of fine-grained soils by drain wells', Transaction, ASCE, Vol.113, pp.718-754
2 Kwon, Oh Sung, Kim, Jung Hwan, Jeon, Kyong Soo, Kim, Myoung Mo (1999), Numerical predictions of the load-displacement curves of rock socketed concrete piles, Journal of the Korean Geotechnical Society., Vol.15, No.3
3 Vesic, A. S. (1977), Design of pile foundations, N.C.H.R.P. Synthesis of Highway Practice 42, pp.22-26
4 Cundall, P. A. (1976), 'Explicit finite difference methods in geomechanics', In Numerical Method in Engineering, Proceedings of the EF Conference on Numerical Methods in Geomechanics, Blacsburg, V.A, Desai, C.S. (ed.), Vol.1, pp.132-150
5 Coyle, H. H. & Reese, L. C. (1966), 'Load transfer for axially loaded piles in clay, J.S.M.F.D., ASCE, Vol.93, SM6, pp.261-278
6 Mindlin, R. D. (1936), 'Force at a point in the interior of a semi-infinite solid', Physics 7, p.195
7 대한토목학회 (2001), 도로교설계기준 해설(하부구조편), pp.245-252