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Effectiveness of a buttress wall in reducing retaining wall movement during dewatering before bulk excavation
https://orcid.org/http://orcid.org/0000-0002-0917-9815
Retaining wall movements are often estimated from a datum at the start of soil excavation. However, recent studies indicate that significant wall movements may occur during pre-excavation dewatering. In this study, the effectiveness of a buttress wall (that is, a short length of wall at 90° to the main wall) in limiting wall movement during pre-excavation dewatering is investigated numerically, focusing in particular on the buttress wall length (LB). Results indicate that wall movement decreases as LB increases. However, a smaller LB (less than 50% of the excavation width) may be sufficient if the drawdown or pumped depth is small (less than 30% of the total depth of retaining wall). With drawdowns greater than 60% of the total wall depth, a larger LB (greater than 75% of the excavation width) is needed to effectively control the deformation.
Effectiveness of a buttress wall in reducing retaining wall movement during dewatering before bulk excavation
https://orcid.org/http://orcid.org/0000-0002-0917-9815
Retaining wall movements are often estimated from a datum at the start of soil excavation. However, recent studies indicate that significant wall movements may occur during pre-excavation dewatering. In this study, the effectiveness of a buttress wall (that is, a short length of wall at 90° to the main wall) in limiting wall movement during pre-excavation dewatering is investigated numerically, focusing in particular on the buttress wall length (LB). Results indicate that wall movement decreases as LB increases. However, a smaller LB (less than 50% of the excavation width) may be sufficient if the drawdown or pumped depth is small (less than 30% of the total depth of retaining wall). With drawdowns greater than 60% of the total wall depth, a larger LB (greater than 75% of the excavation width) is needed to effectively control the deformation.
Effectiveness of a buttress wall in reducing retaining wall movement during dewatering before bulk excavation
https://orcid.org/http://orcid.org/0000-0002-0917-9815
Retaining wall movements are often estimated from a datum at the start of soil excavation. However, recent studies indicate that significant wall movements may occur during pre-excavation dewatering. In this study, the effectiveness of a buttress wall (that is, a short length of wall at 90° to the main wall) in limiting wall movement during pre-excavation dewatering is investigated numerically, focusing in particular on the buttress wall length (LB). Results indicate that wall movement decreases as LB increases. However, a smaller LB (less than 50% of the excavation width) may be sufficient if the drawdown or pumped depth is small (less than 30% of the total depth of retaining wall). With drawdowns greater than 60% of the total wall depth, a larger LB (greater than 75% of the excavation width) is needed to effectively control the deformation.
Effectiveness of a buttress wall in reducing retaining wall movement during dewatering before bulk excavation
Acta Geotech.
Zeng, Chao-Feng (author) / Powrie, William (author) / Xue, Xiu-Li (author) / Li, Miao-Kun (author) / Mei, Guo-Xiong (author)
Acta Geotechnica ; 16 ; 3253-3267
2021-10-01
15 pages
Article (Journal)
Electronic Resource
English
Buttress wall , Deep excavation , Dewatering , Ground deformation , Numerical analysis , Wall deflection Engineering , Geoengineering, Foundations, Hydraulics , Solid Mechanics , Geotechnical Engineering & Applied Earth Sciences , Soil Science & Conservation , Soft and Granular Matter, Complex Fluids and Microfluidics