1-D CONSOLIDATION OF SOFT CLAY SUBJECTED TO CYCLIC LOADING USING LEM
DOI:
https://doi.org/10.11113/mjce.v30.16032Keywords:
Channel entrance configuration, Hot-wire anemometry, Laminar boundary layer flow, Numerical simulation, Streamwise vortices, Wavy channel, 1-D Consolidation, cyclic loading, layered soil, water tanks.Abstract
In this paper, a numerical modification is carried out on the Layer Equation Method (LEM) of El Gendy and Herrmann to be applicable for analyzing 1-D consolidation of soft clay subjected to cyclic loading. The LEM is applicable for multilayered soil system subjected to variable initial stress along depth. The proposed solution is used for normally and over consolidated clays subjected to different types of cyclic loading considering the basis of the method of Toufigh and Ouria. The LEM is incorporated by the authors into the geotechnical software ELPLA and is verified with two verifications. The results of the verifications are close to the references results. The proposed solution is applied for circular storage tanks as a structure subjected to cyclic loading from filling and discharging cycles. An application was held to study the effect of cyclic loading on two zones located at Port-Said city in Egypt using real soil data from real sites. The results of the average degree of consolidation and consolidation settlement versus time are presented for both zones.References
Abbaspour, M. (2014). An Investigation of Consolidation Process under Triangular Cyclic Loading by Numerical and Experimental Analysis. EJGE, Vol. 19, Bund. F, 1403-1416.
Baligh, M. M., Levadoux, J. (1978). Consolidation Theory for Cyclic Loading. J Geotech Eng. Div. ASCE 1978; 104(4): 415–31.
Conte, E. and Troncone, A. (2006). One-Dimensional Consolidation under General Time-Dependent Loading. Can. Geotech. J., Vol. 43(11), 1107-1116.
Das, B.M. (1997). 2nd ed. USA, Tailor & Francis (eds.) Advanced soil mechanics: 296-310.
El Gendy M. and El Gendy A. (2015). Analysis and Design of Slab Foundations by FE-Method- Program ELPLA 10. GEOTEC Software Inc., Canada.
El Gendy, O. (2016). Behavior of Tanks under Static and Cyclic Loading. M.Sc. Thesis, Faculty of Engineering, Port Said University, 197 pp.
Favaretti, M., and Mazzucato, A. (1994). Settlements of a Silo Subjected to Cyclic Loading. Proc., Settlement 94, Vol. 1, ASCE, Reston, VA, 775–785.
Herrmann, R. and El Gendy, M. (2014). A Layer Equation Method for 1-D Consolidation under Time-Dependent Reloading. Ain Shams Eng. J. Vol. 5(4), 1043–1057.
Liu, C., J. C. and Griffiths, D. V. (2015). A General Solution for 1-D Consolidation Induced by Depth and Time-Dependent Changes in Stress. Géotechnique 65(1), 66-72.
Olson, R. E. (1977). Consolidation under Time-Dependent Loading. J. Geotech. Eng. Div., 103(1), 55–60.
Ouria, A., and Toufigh, M. M. (2010). Prediction of Land Subsidence under Cyclic Pumping Based on Laboratory and Numerical Simulations. J. Geotech. Geol. Eng., 28(2), 165–175.
Ouria, A., Desai C. S. and Toufigh, V. (2015). Disturbed State Concept–Based Solution for Consolidation of Plastic Clays under Cyclic Loading. Int. J. Geomech., Vol. 15(1), 04014039.
Pelli, F. and Rossanese, A. (2000): Settlements of an Instrumented Landfill on Soft-Delta Soil with Vertical Wick Drains. International Conference on Geotechnical & Geological Engineering. Melbourne, Australia, November 2000.
Qing-Lu Deng, Xing-Wei Ren (2017). An Energy Method for Deformation Behavior of Soft Clay under Cyclic Loads Based on Dynamic Response Analysis. Soil Dynamics and Earthquake Engineering 94 (2017) 75–82.
Rahal, M. A., and Vueza, A. R. (1998). Analysis of settlement and pore pressure induced by cyclic loading of a silo. J. Geotech. Geoenviron. Eng., 124, 1208–1210.
Schiffman, R. L. (1958). Consolidation of Soil under Time-Dependent Loading and Varying Permeability. Proc., Highway Res. Board, Highway Research Board, Washington, DC, 584–617.
Toufigh, M.M., and Ouria, A. (2009). Consolidation of Inelastic Clays under Cyclic Loading. Soil. Dynamic Earthquake Eng., Vol. 29(2), 356–363.
Wilson, N. E. and El gohary, M. M. (1974). Consolidation of Soils under Cyclic Loading. Can Geotech J 1974; 11(3): 420–33.
Zhuang, Y. C. and Xie, K. (2005). Study on One-Dimensional Consolidation of Soils under Cyclic Loading with Varied Compressibility. J Zhejiang Univ. Science., (6A): 141–7
