Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
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Experimental and 3D numerical analysis of embankment on soft soil improved with cement bottom ash columns
Bottom ash (BA) is a byproduct produced during coal combustion and can be utilized in mortar as a column material to conserve natural resources and promote sustainable ground stabilization. In this paper, the load-carrying capacity performance of the embankment resting on cement bottom ash columns (CBAC) improved ground was examined. Physical model tests and numerical analysis were conducted for the soft soil improved with three columns spacing to diameter ratios (s/d) of 1.8, 2.4, and 3.6 and two columns length to diameter ratios (L/d) of 6 and 8. Three earth pressure transducers, load cell, and pore water pressure transducer were employed to measure the applied vertical stress on the bottom and top of the column and surrounding clay, embankment surface, and excess pore water pressure (u′), respectively. The findings obtained from both physical and numerical models demonstrated that ultimate bearing capacity (qult) increased by reducing the s/d and increasing the L/d values. The qult increased by almost 1.15, 1.39, 1.70 times and 1.18, 1.44, and 1.77 times as compared to the unimproved soil for the s/d of 3.6, 2.4, and 1.8 with L/d values of 6 and 8, respectively. The maximum improvement was achieved for the model with CBAC having L/d of 8 and s/d of 1.8. In addition, a mathematical equation with R2 of 0.999 was established for the determination of the predicted qult. The results of this paper can lead to the usage of BA as a green material in the column for ground stabilization.
Experimental and 3D numerical analysis of embankment on soft soil improved with cement bottom ash columns
Bottom ash (BA) is a byproduct produced during coal combustion and can be utilized in mortar as a column material to conserve natural resources and promote sustainable ground stabilization. In this paper, the load-carrying capacity performance of the embankment resting on cement bottom ash columns (CBAC) improved ground was examined. Physical model tests and numerical analysis were conducted for the soft soil improved with three columns spacing to diameter ratios (s/d) of 1.8, 2.4, and 3.6 and two columns length to diameter ratios (L/d) of 6 and 8. Three earth pressure transducers, load cell, and pore water pressure transducer were employed to measure the applied vertical stress on the bottom and top of the column and surrounding clay, embankment surface, and excess pore water pressure (u′), respectively. The findings obtained from both physical and numerical models demonstrated that ultimate bearing capacity (qult) increased by reducing the s/d and increasing the L/d values. The qult increased by almost 1.15, 1.39, 1.70 times and 1.18, 1.44, and 1.77 times as compared to the unimproved soil for the s/d of 3.6, 2.4, and 1.8 with L/d values of 6 and 8, respectively. The maximum improvement was achieved for the model with CBAC having L/d of 8 and s/d of 1.8. In addition, a mathematical equation with R2 of 0.999 was established for the determination of the predicted qult. The results of this paper can lead to the usage of BA as a green material in the column for ground stabilization.
Experimental and 3D numerical analysis of embankment on soft soil improved with cement bottom ash columns
Acta Geotech.
Ullah, Arshad (Autor:in) / Kassim, Azman (Autor:in) / Rashid, Ahmad Safuan A. (Autor:in) / Huang, Yu (Autor:in) / Junaid, Muhammad (Autor:in) / Roshan, Mohammad Jawed (Autor:in)
Acta Geotechnica ; 19 ; 7727-7745
01.11.2024
19 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Cement bottom ash columns , Embankment , Ground stabilization , Load-carrying capacity Engineering , Geoengineering, Foundations, Hydraulics , Solid Mechanics , Geotechnical Engineering & Applied Earth Sciences , Soil Science & Conservation , Soft and Granular Matter, Complex Fluids and Microfluidics
Stability of Embankment Constructed on Soft Soil Treated with Soil–Cement Columns
| Springer Verlag | 2023
| British Library Online Contents | 2014
Correction to: Stability of Embankment Constructed on Soft Soil Treated with Soil–Cement Columns
| Springer Verlag | 2023