Suitability analysis of vertically installed scoria gravel drains for enhancing consolidation performance of clayey ground

In alleviating challenges associated to long-lasting consolidation of clay, highly permeable materials such as sand and crushed aggregate are used as drain. Despite the fact that granular vertical drains are effective in shortening the prolonged consolidation period of clay, limited information exis...

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Main Authors: Adamu Beyene, Hailemariam Merka, Damtew Tsige
Format: Article
Language:English
Published: Elsevier 2023-03-01
Series:Results in Engineering
Subjects:
Online Access:http://www.sciencedirect.com/science/article/pii/S2590123023001020
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author Adamu Beyene
Hailemariam Merka
Damtew Tsige
author_facet Adamu Beyene
Hailemariam Merka
Damtew Tsige
author_sort Adamu Beyene
collection DOAJ
description In alleviating challenges associated to long-lasting consolidation of clay, highly permeable materials such as sand and crushed aggregate are used as drain. Despite the fact that granular vertical drains are effective in shortening the prolonged consolidation period of clay, limited information exist regarding applicability of scoria gravel as vertical drain that no concisely documented information is observed in literatures. This study hence aimed at evaluating suitability of scoria gravel as vertical drain in perpetuating consolidation process of soft clay under road embankment. Finite element-based simulation was used to model the drains. To incorporate the effect of gradual load increment on consolidation rate, staged construction approach was employed. Various dimensions of scoria vertical drain (SVD) have been considered to investigate the effect of dimension parameters. Besides, comparison has been made between performances of SVD and crushed aggregate drains (CAD) in impacting the consolidation process. The numerical analysis result revealed that provision of group of SVD considerably accelerated consolidation rate. With increase in drain diameter, the consolidation rate goes increasing whereas it is inversely related to increase in drain spacing. For SVD installed at spacing of 2 m, diameter of 0.4 m and length of 8 m any arbitrary settlement magnitude is achieved 25 days earlier than the case without drain. No considerable difference was witnessed in performance of the square and triangular installation patterns though the consolidation rate remains slightly faster in the case of triangular installation. In speeding up consolidation rate, SVD was observed to perform slightly better than the CAD.
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spelling doaj.art-dc3ae4e09e6d4413aabd2e7924fd030c2023-02-27T04:07:24ZengElsevierResults in Engineering2590-12302023-03-0117100975Suitability analysis of vertically installed scoria gravel drains for enhancing consolidation performance of clayey groundAdamu Beyene0Hailemariam Merka1Damtew Tsige2Corresponding author.; Department of Civil Engineering, Jimma Institute of Technology, Jimma University, EthiopiaDepartment of Civil Engineering, Jimma Institute of Technology, Jimma University, EthiopiaDepartment of Civil Engineering, Jimma Institute of Technology, Jimma University, EthiopiaIn alleviating challenges associated to long-lasting consolidation of clay, highly permeable materials such as sand and crushed aggregate are used as drain. Despite the fact that granular vertical drains are effective in shortening the prolonged consolidation period of clay, limited information exist regarding applicability of scoria gravel as vertical drain that no concisely documented information is observed in literatures. This study hence aimed at evaluating suitability of scoria gravel as vertical drain in perpetuating consolidation process of soft clay under road embankment. Finite element-based simulation was used to model the drains. To incorporate the effect of gradual load increment on consolidation rate, staged construction approach was employed. Various dimensions of scoria vertical drain (SVD) have been considered to investigate the effect of dimension parameters. Besides, comparison has been made between performances of SVD and crushed aggregate drains (CAD) in impacting the consolidation process. The numerical analysis result revealed that provision of group of SVD considerably accelerated consolidation rate. With increase in drain diameter, the consolidation rate goes increasing whereas it is inversely related to increase in drain spacing. For SVD installed at spacing of 2 m, diameter of 0.4 m and length of 8 m any arbitrary settlement magnitude is achieved 25 days earlier than the case without drain. No considerable difference was witnessed in performance of the square and triangular installation patterns though the consolidation rate remains slightly faster in the case of triangular installation. In speeding up consolidation rate, SVD was observed to perform slightly better than the CAD.http://www.sciencedirect.com/science/article/pii/S2590123023001020Soft clayScoria gravel drainsStaged constructionConsolidation settlementCrushed aggregate drains
spellingShingle Adamu Beyene
Hailemariam Merka
Damtew Tsige
Suitability analysis of vertically installed scoria gravel drains for enhancing consolidation performance of clayey ground
Results in Engineering
Soft clay
Scoria gravel drains
Staged construction
Consolidation settlement
Crushed aggregate drains
title Suitability analysis of vertically installed scoria gravel drains for enhancing consolidation performance of clayey ground
title_full Suitability analysis of vertically installed scoria gravel drains for enhancing consolidation performance of clayey ground
title_fullStr Suitability analysis of vertically installed scoria gravel drains for enhancing consolidation performance of clayey ground
title_full_unstemmed Suitability analysis of vertically installed scoria gravel drains for enhancing consolidation performance of clayey ground
title_short Suitability analysis of vertically installed scoria gravel drains for enhancing consolidation performance of clayey ground
title_sort suitability analysis of vertically installed scoria gravel drains for enhancing consolidation performance of clayey ground
topic Soft clay
Scoria gravel drains
Staged construction
Consolidation settlement
Crushed aggregate drains
url http://www.sciencedirect.com/science/article/pii/S2590123023001020
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AT hailemariammerka suitabilityanalysisofverticallyinstalledscoriagraveldrainsforenhancingconsolidationperformanceofclayeyground
AT damtewtsige suitabilityanalysisofverticallyinstalledscoriagraveldrainsforenhancingconsolidationperformanceofclayeyground