Numerical analysis of single rammed aggregate piers installed in stratified soil profiles

Yıl 2020, Cilt: 22 Sayı: 1, 133 - 148, 10.01.2020

Zülal Akbay Arama

https://doi.org/10.25092/baunfbed.679559

Öz

In this study, Rammed Aggregate Pier systems are analyzed according to the numerical analysis that are performed by two dimensional commercial finite element analysis software. The focus point of the paper is to identify the effects of pier dimensions, stratification of foundation soil profile and load applying levels on the deformation behavior of interacted rammed aggregate pier-surrounding soil system at the installation stage. Interpretations of the parametrical analyses are focused on the deformation change via loading levels. The relative displacement occurrence between pier and soil matrix is also checked.

Anahtar Kelimeler

: Rammed aggregate pier, soil stratification, finite element analysis, pier installation, dimension effect

Tabakalanmış zemin profillerinde inşa edilen tekil kırmataş kolonların sayısal analizi

Öz

Bu çalışmada, Darbeli Kırmataş Kolon sistemlerinin sayısal analizi iki boyutlu ticari bir sonlu elemanlar programı kullanılarak yapılmıştır. Çalışmanın odak noktası; kazık boyutlarının, temel tabakalanma özelliklerinin ve kazık yükleme seviyesinin, inşa sırasında ve sonrasında etkileşimli kazık-semin sistemi içerisinde meydana gelen deformasyon davranışı üzerindeki etkilerinin araştırılmasıdır. Uygulanan parametrik analizlerin sonuçları düşey deformasyonların yükleme seviyesine bağlı değişimi olarak incelenmiştir. Kazık ve zemin arasında meydana gelen rölatif deplasmanlar da ayrıca kontrol edilmiştir.

Anahtar Kelimeler

Darbeli kırmataş kolon, tabakalanmış zemin, sonlu elemanlar analizi, kazık inşası, boyut etkisi

Kaynakça

• Mitchell, J.K., Soil improvement-State-of-the-Art, Proceedings of 10th International Conference on Soil Mechanics and Foundation Engineering, ICSMFE, Stockholm, June, 4, 509 565, (1982).
• Lawton, E.C. and Fox, N. S., Settlement of Structures Supported on Marginal Old Inadequate Soils Stiffened with Short Aggregate Piers’, In-situ Deep Soil Improvement, Proc. ASCE National Convention, Atlanta, Georgia, 121-132, (1994).
• Lawton, E.C., Fox, N.S. ve Handy, R.L., Control of Settlement and Uplift of Structures Using Short Aggregate Piers , In-situ Deep Soil Improvement, Proc. ASCE National Convention, Atlanta, Georgia, 121–132, (1994).
• Wissmann, K.J., Meser, K. Ve Pando, M., Reducing Settlement Risk in Residual Piedmond Soil Using Rammed Aggregate Pier elements, Proceeding ASCE Specialty Conference, Blacksburg, (2001).
• Farrell, T. ve Taylor, A., Rammed Aggregate Pier Design and Construction in California-Performans, Constructability and Economics, SEAOC 2004 Convention Proceeding, California, (2004).
• White, D. J., Pham, H. T. V., and Hoevelkamp, K. K., Support mechanisms of rammed aggregate piers. I: Experimental results, J. Geotech. Geoenviron. Eng., 133 (12), 1503-1511, (2007).
• Kumar, P. and Ranjan, G., Granular pile system for uplifting loads – A case study., Proc. of the International Conference on Offshore and Nearshore Geotechnical Engineering. 427-432, (1999).
• Stuedlein, A. W. and Holtz, R. D., Bearing Capacity of Spread Footings on Aggregate Pier Reinforced Clay, J. Geotech. Geoenviron. Eng., 139 (1), 49-58, (2013).
• Halabian AM, Naeemifar I, Hashemolohosseini SH., Numerical analysis of vertically loaded rammed aggregate piers and pier groups, Ground Improvement Journal, (2015).
• Lien, B. H., Fox, N., and Kwonk, H., Geopier Floating Foundations, A Solution For Roadway Embankments Over Soft Soils in Asia, presented at the 2nd World Engineering Congress, Kuching, Malaysia, July 22–25, Universiti Putra Malaysia Press, Malaysia, 22–25, (2002).
• Handy, R. L., Does Lateral Stress Really Influence Settlement, Journal of Geotechnical and Geoenvironmental Engineering, 127, (7), 623–626, (2001).
• Thompson, M. J., Wissmann, K. J., and Pham, H. T., Performance Monitoring of a Rammed Aggregate Pier Foundation Supporting a Mechanically Stabilized Earth Wall, J. Perform. Constr. Facilities, 23, (4), 244–250, (2009).
• Handy, R. and White, D. J., Stress Zones Near Displacement Piers: I. Plastic and Liquefied Behavior, J. Geotech. Geoenviron. Eng., 132 (1), 54-62, (2006a).
• Handy, R. and White, D. J., Stress Zones Near Displacement Piers: II. Radial Cracking and Wedging, J. Geotech. Geoenviron. Eng., 132(1), 63-71, (2006b).
• White, D. J., Lawton, E. C., and Pitt, J. M., Lateral Earth Pressure Induced by Rammed Aggregate Pier, presented at the 53rd Annual Canadian Geotechnical Conference,Montreal, Canada, October 15–18, 2, 871-876, (2000).
• Handy, R. L., Fox, N. S., and Wissmann, K. J., Short aggregate piers reinforce soils near tunnels. Proc., Geo-Engineering for Underground Facilities, Geotechnical Special Publication No. 90, ASCE, Reston, Va., 1039–1047, (1999).
• Halabian, A. M. and Shamsabadi, P. J., Numerical Modeling of the RAP Construction Process and Its Effects on RAP Behavior, Int. J. Geomech., 15 (5), (2014).
• Chen J, Han J, Oztoprak S, Yang Y., Behavior of single rammed aggregate piers considering installation effects. Journal of Computers and Geotechnics, 36:1191–9, (2009).
• Pham, T. V., White, D. J., Support mechanisms of rammed aggregate piers, I: experimental results, Journal of Geotechnical and Geoenviromental Engineering, 133(12):1503-11, (2007).
• Pham, H. T., Suleiman, M. T., and White, D. J., Numerical Analysis of Geosynthetic Rammed Aggregate Pier Supported Embankments, Geotechnical Engineering for Transportation Projects, M. K. Yegian and E. Kavazanjian, ASCE, Reston, VA, 657–664, (2004).
• White, D. J., Wissmann K. J., Barnes A. G. and Gaul A. J., Embankment Support: A Comparison of Stone Column and Rammed Aggregate Pier Soil Reinforcement, Presented at Transportation Research Board, 81st Annual Meeting, Washington, D.C., January 13-17, (2002).
• White, D. J., Gaul, A. J., and Hoevelkamp, K., Highway appli-cations for rammed aggregate pier in Iowa soils., Final Rep., DOTTR-443, Ames, Iowa, (2003).
• Pham, H.T., Support Mechanism of Rammed Aggregate Piers, A dissertation submitted to the graduate faculty in partial fulfillment of the requirements for the degree of Doctor of Philosophy, Iowa State University, Ames, Iowa, (2005).