Assessment of the Efficiency of Rigid Inclusions as a Settlement Control System – Case Study | ||||
| International Journal of Advances in Structural and Geotechnical Engineering | ||||
| Article 5, Volume 06, Issue 02, May 2022, Page 52-67 PDF (1.12 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/asge.2022.280713 | ||||
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| Abstract | ||||
| This paper presents a summary of the research work conducted to assess the efficiency of rigid inclusions (RI) as a settlement control system for foundations on soft marine soils (Deltaic formations). The study was conducted at the proposed construction site of a new university located in the coastal city of New Mansoura, North Delta. The RI system comprises unreinforced concrete cast in place displacement piles overlain by a layer of crushed stone-sand mix acting as a load transfer platform (LTP) under the building’s footings. To verify the proposed RI system, a specialized contractor conducted full scale trial loading test. The evaluation methodology comprises detailed geotechnical investigation, evaluation of the results of the trial test performed by the specialized contractor, advanced 3D finite element analyses were performed to simulate the trial test (short-term condition) as well as investigation of the long-term behavior of the proposed system (drained condition). The results of analyses have shown that the construction of the rigid inclusion significantly reduced the predicted settlements of the foundation compared to un-piled footing. Reduction in settlements in the undrained and drained conditions are about 30% to 37%, respectively compared to un-piled footing reflecting the efficiency of RI system in controlling foundation settlements. In the undrained condition, the percentage of the load transferred to the rigid inclusions are predicted to be about 63% and 50% for the working and ultimate loading conditions, respectively. While the counterpart percentages in drained condition, are about 76% and 60%. | ||||
| Keywords | ||||
| Rigid inclusions; Full-scale; Loading test; Elasto-plastic analysis; Drained and undrained; Soft soil | ||||
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