Centrifuge and Numerical Modeling of an Embankment on Liquefiable Soils Treated with Dense Granular Columns
Publication: Geo-Congress 2022
ABSTRACT
Dense granular columns (DGC) have become a common soil improvement strategy for embankment structures founded on liquefiable deposits. However, the state-of-practice for the design of DGCs is still limited to simplified methods where the influence of key mitigation mechanisms on the likelihood of triggering is considered in a decoupled manner. Further, the effects of soil-column-embankment interaction, performance, site characteristics, layer-to-layer interaction, and ground motion’s evolutionary characteristics are not included in current engineering design procedures. In this work, we present preliminary results from a numerical parametric study, previously validated against centrifuge tests, to help evaluate the seismic performance of embankments on liquefiable deposits treated with DGCs. We focus on engineering demand parameters that control the embankment design and performance. These analyses are intended to help identify the key predictors of the embankment’s seismic response and the underlying trends. These results set the stage for the development of future design procedures for DGCs near embankment structures.
Get full access to this chapter
View all available purchase options and get full access to this chapter.
REFERENCES
Badanagki, M., Dashti, S., and Kirkwood, P. (2018). “Influence of dense granular columns on the performance of level and gently sloping liquefiable sites.” J. Geotech. Geoenviron. Eng. 144 (9): 04018065.
Badanagki, M., Dashti, S., Paramasivam, B., and Tiznado, J. C. (2019). “How do granular columns affect the seismic performance of non-uniform liquefiable sites and their overlying structures?.” Soil Dynamics and Earthquake Engineering, 125, 105715.
Elgamal, W. A., Yang, Z., Parra, E., and Ragheb, A. (2003). “Modeling of cyclic mobility in saturated cohesionless soils.” Int. J. Plast., 19(6), 883–905.
Hausler, E. A. (2002). Influence of ground improvement on settlement and liquefaction: A study based on field case history evidence and dynamic geotechnical centrifuge tests. Ph.D. thesis, Dept. of Civil and Environ. Eng., Univ. of California, Berkeley.
Hwang, Y. W., Ramirez, J., Dashti, S., Kirkwood, P., Liel, A. B., Camata, G., and Petracca, M. (2021). “Seismic Interaction of Adjacent Structures on Liquefiable Soils: Insight from Centrifuge and Numerical Modeling,” J. Geotech. Geoenviron. Eng. Accepted and in Press.
Karimi, Z., and Dashti, S. (2016). “Seismic performance of shallow founded structures on liquefiable ground: validation of numerical simulations using centrifuge experiments.” J. Geotech Geoenviron Eng. 142 (6): 04016011.
Li, P., Dashti, S., Badanagki, M., and Kirkwood, P. (2018). “Evaluating 2D numerical simulations of granular columns in level and gently sloping liquefiable sites using centrifuge experiments.” Soil Dyn. Earthquake Eng. 110: 232–243.
NCEER. (1997). Proceedings of the NCEER workshop on evaluation of liquefaction resistance of soils. In: Youd TL, Idriss IM (Eds.), Technical Report No. NCEER-97-0022.
Olson, S. M., Mei, X., and Hashash, Y. M. A. (2020). “Nonlinear site response analysis with pore-water pressure generation for liquefaction triggering evaluation.” J. Geotech. Geoenviron. Eng., 2020, 146(2): 04019128.
Ramirez, J., Barrero, A. R., Chen, L., Dashti, S., Ghofrani, A., Taiebat, M., and Arduino, P. (2018). “Site response in a layered liquefiable deposit: Evaluation of different numerical tools and methodologies with centrifuge experimental results.” J. Geotech. Geoenviron. Eng. 142 (10):04018073.
Rayamajhi, D., Boulanger, R. W., Ashford, S. A., and Elgamal, A. (2016). “Dense granular columns in liquefiable ground. II: Effects on deformations.” J. Geotech. Geoenviron. Eng. 142 (7): 04016024.
Tiznado, J. C., Dashti, S., Ledezma, C., Wham, B. P., and Badanagki, M. (2020). “Performance of Embankments on Liquefiable Soils Improved with Dense Granular Columns: Observations from Case Histories and Centrifuge Experiments.” J. Geotech. Geoenviron. Eng., 146(9), 04020073.
Tiznado, J. C., Dashti, S., and Ledezma, C. (2021). “Probabilistic Predictive Model for Liquefaction Triggering in Layered Sites Improved with Dense Granular Columns,” J. Geotech. Geoenviron. Eng. 147(10): 04021100.
Information & Authors
Information
Published In
Geo-Congress 2022
Pages: 486 - 494
History
Published online: Mar 17, 2022
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.