Behavior of Laterally top-Loaded Drilled Piles in Collapsible Tropical Soil
Abstract
Among the various types of loading to which foundations are subject, one can single out transversal (horizontal) forces. In general terms, we notice a lack of knowledge on the parameters used to design pile foundations with this type of load which will stress surface soil, considering that tropical soils are very often collapsible. Aiming to furnish input for future geotechnical projects, transversal loading tests were performed on a bored pile and a continuous flight auger (CFA) pile, both 12.0 m in length, and 0.40 m in diameter. The loading tests were performed with the soil in its natural condition and by pre-flooding the area, at the UNICAMP Experimental Soil Mechanics and Foundations Field I in Campinas/SP, Brazil, where the unsaturated soil is porous and classified as silty-sandy clay. The edometric tests indicated that is a collapsible soil in the surface bed up to 6.5m, and that the reduction in pre-collapse stress in the flooded condition is of the order of three times that of the natural condition. The load tests indicated that the maximum load in the natural condition is five times higher than in the flooded condition and that the value of n h (horizontal reaction coefficient) reduces substantially with the effect of increasing soil moisture content.
References
(1991) Static load test.
P.J.R. Albuquerque, D Carvalho, R Kassouf, N.L. Fonte Jr. (2019) Behavior of Laterally Top-Loaded Deep Foundations in Highly Porous and Collapsible Soil. 31(2). https://doi.org/10.1061/(ASCE)MT.1943-5533.00025
P.J.R. Albuquerque, F Massad, A Viana da Fonseca, D Carvalho, J Santos, E.C. Esteves (2011) Effects of the construction method on pile performance: evaluation by instrumentation. part 1: experimental site at the State University of Campinas. 34(1), 35-50. https://doi.org/10.28927/SR.341035
(2004) Standard test methods for one-dimensional consolidation properties of soils using incremental loading.
Y Barbosa, M.H.P. Tarozzo, P.J.R. Albuquerque, D Carvalho (2023) Behavior of a new laterally top-loaded post-grouted micropile in highly porous lateritic soil. 90(225), 123-131. https://doi.org/10.15446/dyna.v90n225.104807
B.B. Broms (1964) Lateral resistance of piles in cohesionless Soils. 90(SM-3), 123-1564.
D. Carvalho, P.J.R. Albuquerque, A.T. Claro, C.V. Ferreira (1996) Analysis of a pile loaded transversely at the top in residual diabase soil. 1, 145-154.
D. Carvalho, P.J.R. Albuquerque, H.L. Giacheti (2000) Experimental field for soil mechanics and foundations studies in Campinas. 3, 79-87.
M.T. Davisson (1970) Lateral load capacity of piles. 104-112.
M.T. Davisson, H.L. Gill (1963) Laterally loaded piles in a layered soil system. 89(SM-3), 63-94.
J.H. Dudley (1970) Review of Collapsing Soils. 96(SM3), 925-947.
F.J.A. García, R.P. Cunha, P.J.R. Albuquerque, M.M. Farias, H.C. Bernardes (2023) Experimental and Numerical Behavior of Horizontally Loaded Piled Rafts with a Defective Pile. 41, 429-439. https://doi.org/10.1007/s10706-022-02288-2
J.E. Jennings, K. Knight (1957) The Additional Settlement of Foundations Due to a Collapse of Structure of Sandy Sub Soils on Wetting. 1, 316-319.
R. Kassouf, D. Carvalho, P.J.R. Albuquerque (2016) The behavior of a foundation transversally loaded at the top over highly porous and collapsible soil. 83(199), 134-139. https://doi.org/10.15446/dyna.v83n199.52529
H. Matlock, L.C. Reese (1960) Generalized solutions for laterally loaded piles. 86(SM5), 63-91.
H. Matlock, L.C. Reese (1961) Foundation analysis of offshore pile supported structures. 2, 91-97.
H Matlock, L.C. Reese (1961) Generalized solutions for laterally loaded piles. 86(SM5), 63-91.
R.J. Miche (1930) Investigation of piles subjected to horizontal forcer. Application to quay walls. (n. 4).
L.A. Palmer, J.B. Thompson (1948) The Earth pressure and deflection along the embedded lengths of piles subject to lateral thrusts. 5, 156-161.
H.G. Poulos (1971) Behavior of laterally loaded piles: I %E2%80%93 Single Piles. (9795), 711-731.
H.G. Poulos, E.H. David (1980) Pile Foundation analysis and Design. 357p.
D.C. Rosendo, P.J.R. Albuquerque (2021) General analytical solution for laterally loaded pile based Miche model. 39, 765%E2%80%93782. https://doi.org/10.1007/s10706-020-01520-1
K. Terzaghi (1955) Evaluation of coefficients of subgrade reaction. 5(4), 297-326.
M (1978) Introduction to soil mechanics. 509p.
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