Performance of Nano-Bio Treated Columns in Slope Stability Using Centrifuge Modeling

Performance of Nano-Bio Treated Columns in Slope Stability Using Centrifuge Modeling. Ghalandarzadeh, S., Maghoul, P., & Ghalandarzadeh, A. In pages 82 - 99, Kyrenia, Cyprus, 2024.

Paper abstract bibtex

Stability of ground slopes is of paramount importance in geotechnical engineering. Several mitigating methods have been proposed in the literature and applied in practice. In this study, the effect of nano-bio-treated columns, as green cement inclusions, on the stability of a clayey slope is investigated by conducting two centrifuge Ng model tests. Rigid inclusions have been made by using enhanced Microbially Induced Calcite Precipitation (MICP) and 1.5% nano- SiO 2. Unimproved and improved models were loaded in a beam centrifuge device by increasing centrifugal acceleration. Failure surfaces gradually appeared in the unimproved model after the centrifugal acceleration reached 40 g. By increasing the acceleration to 58 g, at the end of the test, very large deformations were observed. In contrast, the stability of the improved model was maintained without any clear failure surface by the end of the test where the centrifugal acceleration was increased up to 77 g. It indicates the use of new nano-bio cement inclusions can be an effective approach for improving slope stability in clayey soils.

@inproceedings{20241916041150 ,
language = {English},
copyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},
copyright = {Compendex},
title = {Performance of Nano-Bio Treated Columns in Slope Stability Using Centrifuge Modeling},
journal = {Springer Series in Geomechanics and Geoengineering},
author = {Ghalandarzadeh, Sara and Maghoul, Pooneh and Ghalandarzadeh, Abbas},
year = {2024},
pages = {82 - 99},
issn = {18668755},
address = {Kyrenia, Cyprus},
abstract = {<div data-language="eng" data-ev-field="abstract">Stability of ground slopes is of paramount importance in geotechnical engineering. Several mitigating methods have been proposed in the literature and applied in practice. In this study, the effect of nano-bio-treated columns, as green cement inclusions, on the stability of a clayey slope is investigated by conducting two centrifuge Ng model tests. Rigid inclusions have been made by using enhanced Microbially Induced Calcite Precipitation (MICP) and 1.5% nano- SiO <inf>2</inf>. Unimproved and improved models were loaded in a beam centrifuge device by increasing centrifugal acceleration. Failure surfaces gradually appeared in the unimproved model after the centrifugal acceleration reached 40 g. By increasing the acceleration to 58 g, at the end of the test, very large deformations were observed. In contrast, the stability of the improved model was maintained without any clear failure surface by the end of the test where the centrifugal acceleration was increased up to 77 g. It indicates the use of new nano-bio cement inclusions can be an effective approach for improving slope stability in clayey soils.<br/></div> © 2024, The Author(s), under exclusive license to Springer Nature Switzerland AG.},
key = {Kaolinite},
%keywords = {Bacteriology;Calcite;Centrifugation;Centrifuges;Geotechnical engineering;Silica;Slope stability;Soil cement;Soil mechanics;Soil testing;Soils;Stabilization;},
%note = {Bacillus pasteurii;Biocalcification;Calcite precipitation;Centrifugal acceleration;Centrifuge tests;Failure surface;Microbially induced calcite precipitation;Nature-based soil stabilization;Slope;Soil stabilization;},
URL = {http://dx.doi.org/10.1007/978-3-031-51951-2_8},
}

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