Scholarly record
DETERMINING CHANGES IN THE STRESS STATE AND DEFORMATION PROPERTIES AROUND A STONE COLUMN
Abstract
Stone columns are one of the most-used technologies of soil improvement in Slovakia. The stone columns installed using the vibro-replacement technology cause the change in the stress state and the properties of the surrounding soil. These changes are often not taken into account in the design. The paper deals with determine the change of the stress state and oedometer modulus in the soil around a single stone column. The calculations have been prepared in the form of a parametric study. The selected properties of the soil represented clay of intermediate plasticity of different consistency. Two different calculation methods were used, i.e., numerical modelling and analytical approach. The numerical models were created as axisymmetric models using Plaxis geotechnical software. The soils were modelled using the hardening soil material model. The analytical models were based on the cavity expansion theory. The cavity expansion theory seems to be one of the most appropriate analytical methods for a given study because it simulates creating a cylindrical space and the horizontal displacement of the soil to the surrounding area, which is very similar to the real installation process of a stone column. The results of the study showed that the radial stresses and oedometer modules determined using both methods were slightly different. Increasing the shear strength properties of soil causes an increase in the difference between radial stresses computed using both methods used. The study presented showed that the results computed using the cavity expansion theory are more conservative than the results computed using numerical modelling.
Publication Impact Profile
- Captures
- Mendeley - Readers: 4
Publication details
References11
Hird C. C., Pyrah I. C., Russell D., Finite element modeling of vertical drains beneath embankments on soft ground, Geotechnique, vol. 42/issue 3, pp. 499-511, 1992;
Weber T. M., Modeling of ground improvement with stone columns, Doctoral Thesis, ETH Zurich, pp. 274, 2009, (in German);
Castro J., Sagaseta C., Consolidation and deformation around stone columns: Numerical evaluation of analytical solutions, Computers and Geotechnics, vol. 38/issue 3, pp. 354-362, 2011;
Barksdale R. D., Bachus R. C., Design and construction of stone columns, Vol. 1., Report No. FHWA/RD-83/026, Federal Highway Administration, Washington, D. C., USA, pp. 46, 1983;
Tur?ek P., Hulla J., Bart?k J., Van??ek I., Masopust J., Rozsypal, A., Foundation Engineering, Jaga, Bratislava, Slovakia, pp. 359, 2005, (in Czech);
Hayward Baker, Vibro Replacement, Available at: https://www.haywardbaker.com/solutions/techniques/vibro-replacement [Accessed: 25 June 2019]
Mecsi J., Geotechnical engineering examples and solutions using the cavity expansion theory, Geotechnical Society Hungary, Budapest, Hungary, 232 pp., 2013;
Bishop R., Hill R., Mott N. F., The theory of indentation and hardness tests, Proceedings of the physical Society, vol. 57/issue 3, pp. 147-159, 1945;
Au S. K. A., Yeung A. T., Soga K., Pressure controlled cavity expansion in clay, Canadian Geotechnical Journal, vol. 43/issue 7, pp. 714-725, 2006;
Rao P., Cui J., Li J., The elastoplastic solutions of cylindrical cavity expansion considering the K0 ? 1. Advances in Soil Dynamics and Foundations Engineering GSP 240, Geo-Shanghai 2014, Shanghai, China; pp. 433-443, 2014;
Stacho J., Analysis of impact of input soil properties in numerical modelling of a stone column, Actual geotechnical solutions and their verification, Bratislava: Spektrum STU, Bratislava, Slovakia, pp. 302-309, 2017;
View or Download full articleAccess options
SWS access login
Login as SWS Scientific CommitteeLogin as SWS Scientific PartnerLogin as SWS AuthorAuthors and approved SWS contributors will read and export their own linked papers after identity matching by SWS profile, email and SGEM GlobalID.
For librarian assistance: [email protected]
Purchase Instant Access
- Article can be downloaded after successful payment.
- Article may be used according to SWS library access terms.
- Article cannot be redistributed.