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Assessment of the Efficiency of Rigid Inclusions as a Settlement Control System – Case Study

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Last updated: 13 Dec 2022

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Tags

Rigid inclusions
Full-scale
Loading test
Elasto-plastic analysis
Drained and undrained
Soft soil
Assessment of the Efficiency of Rigid Inclusions as a Settlement Control System – Case Study
ICASGE'23

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

Authors

First Name

Amr

Last Name

A. Hemada

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Orcid

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First Name

Abdullah

Last Name

M. Galaa and Tarek T. Abdel-Fattah

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Volume

ICASGE2021

Issue Date

1 Jan 2021

Publish Date

29 May 2022

Link

https://icasge.conferences.ekb.eg/article_1602.html

Order

331

Publication Type

Conference

Publication Title

ICASGE'23

Publication Link

https://icasge.conferences.ekb.eg/

Details

Type

Article

Locale

en

Created At

13 Dec 2022