Numerical Analysis to Quantify the Influence of Smear Zone Characteristics on Preloading Design in Soft Clay

Publisher:
Presses des Ponts
Publication Type:
Conference Proceeding
Citation:
Challenges and innovations in geotechnics. Proceedings of the 18th International Conference on Soil Mechanics and Geotechnical Engineering, 2013, pp. 2573 - 2576
Issue Date:
2013-01
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In this paper, the effects of uncertainties of smear zone charateristics induced by installation of. fabricated vertical drains on the preloading design are numerically investigated, FLAC 2D finite difference software with additional developed subroutines has been employed to conduct the numerical simulations. The finite difference analyses have been verified using a case study. Furthermore, a comprehensive parametric study is conducted to investigate the influence of iimear zone permeability and extent on the model predictions. Results of this study indicate that the assumplive properties for smear zone characteristics may result in inaccurate predictions of ground deformations and pore water pressures. This may lead to early removal of the surcharge in the construction process causing excessive post construction settlement. It is recommended to practising engineers to use results of trial preloading to back calculate the required smear zone characleristics in the early stages of embankment construction to optimize the design.
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