Scholarly record
DEFORMATION ANALYSIS OF SOFT SUBSOIL IMPROVED USING STONE COLUMNS FOR THE FOUNDATION OF A TANK
Abstract
The paper deals with an analysis of the settlement of a tank. The tank has a diameter of 18.6 m and a volume of 1760 m3. The subsoil consists of soft sandy clays and clays of low to medium plasticity. The tank has been founded on a slab of a thickness of 0.2 m. A consolidation layer of compacted gravel of a thickness of 1 m was created immediately below the foundation slab. The soft subsoil was improved using the stone columns. The stone columns were installed using vibro-replacement bottom feed technology. The stone columns were created in a square mesh of a dimension of 2 x 2 m and 3 x 3 m. The settlement of the tank was computed using Fine Geo5 geotechnical software. The improvement of the subsoil was taken into account using three models. The first model took into account the subsoil below the foundation slab without any improvement. The second model took into account the homogenization of the subsoil without considering the compaction of the original subsoil between the stone columns. The third model also took into account the compaction of the original subsoil between the stone columns. The results of the analysis showed that the compaction effect causes an improvement of oedometer modules of about 1 - 2.8 times depending on the boundary conditions. The final settlement of the tank is significantly smaller when the compaction effect of the original subsoil between stone columns is taken into account in the calculation. In this case, the requirements of serviceability limit state, such as final settlement and non-uniform settlement, were fulfilled. The results of the deformation analysis allowed optimization of the stone columns dimensions.
Publication Impact Profile
- Captures
- Mendeley - Readers: 4
Publication details
References10
Greenwood D. A., Mechanical Improvement of Soils Below Ground Surface, Conference on Ground Engineering, Institute of Civil Engineering London, London, United Kingdom, pp. 11-22, 1970;
Vesic, A. S., Expansion of Cavities in Infinite Soil Mass, Journal of the Soil Mechanics and Foundation Division, vol. 98/issue 3, pp. 265-290, 1972;
Stacho, J., Determining the Settlement of Subsoil below an Embankment Founded on Stone Columns, Buildustry, vol. 4/issue 1, pp. 54-57, 2020;
Hu, W., Wood, D. M., Stewart, W., Ground Improvement Using Stone Column Foundations: Result of Model Tests, International Conference on Ground Improvement Techniques, CI-Premier, Singapore, pp. 247-256, 1997;
Wood, D. M., Hu, W., Nash, D. F. T., Group Effects in Stone Column Foundations: Model Tests, Geotechnique, vol. 50/issue 6, pp. 689-698, 2000;
Castro, J., Sagaseta, C., Consolidation and Deformation Around Stone Columns: Numerical Evaluation of Analytical Solutions, Computers and Geotechnics, vol. 38/issue3, pp. 354-362, 2011;
Hayward Bakker, Keller Company, Vibro Replacement, website: https://www.haywardbaker.com/solutions/techniques/vibro-replacement Downloaded: June 25, 2019;
Fiala, R., Bo?t?k, J., Kota?kov?, A., Mi?a, L., Zdra?il, K., Masopust, J., Technologies of Stone Columns for Practise (Design, Implementation and Control). Brno: Academic Publishing CERM, Czech Republic, 151 p., 2014,
Stacho, J., Numerical Analysis of Stone Columns Created Using Different Types of Coarse-grained Material, SGEM 2017, 17th International Multidisciplinary Scientific GeoConference, vol. 17, Bulgaria, pp. 579-586, 2017;
Tur?ek, P., Hulla, J., Foundation engineering, Jaga group, s. r. o, Bratislava, Slovakia, 303 p., 2004.
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.