A hybrid method to determine optimal design axial forces of servo steel struts in excavations with high deformation requirements
ISSN: 0264-4401
Article publication date: 9 June 2023
Issue publication date: 15 June 2023
Abstract
Purpose
The application of servo steel struts enables the active control of the excavation-induced deformation in foundation pits. However, there is currently only one design axial force for each servo steel strut, which requires in-situ axial force adjustments based on the experience of site engineers. The purpose of this study is to develop a method for determining the design axial forces of servo steel struts at different excavation steps.
Design/methodology/approach
In this study, a hybrid method for determining the design axial forces of servo steel struts in different excavation steps was established based on the combination of the elastic foundation beam model and nonlinear optimisation.
Findings
The hybrid method is capable of providing a better set of design axial forces than the original design method. The lateral wall displacement and bending moment could be better controlled. Ordinary steel struts should be prevented from being set between servo steel struts to avoid axial force losses.
Practical implications
The axial forces of the servo steel struts at different excavation steps should be designed to achieve better deformation control effects. Moreover, a well-designed set of axial forces can also reduce the internal forces of the retaining structure.
Originality/value
The hybrid method enables the determination of the design axial forces of servo steel struts at different excavation steps, which can guide axial force adjustments in practical projects.
Keywords
Acknowledgements
This study was supported by the National Natural Science Foundation of China through the Grant No. 52278456.
Citation
Di, H., Jin, Y., Zhou, S. and Wu, D. (2023), "A hybrid method to determine optimal design axial forces of servo steel struts in excavations with high deformation requirements", Engineering Computations, Vol. 40 No. 4, pp. 997-1015. https://doi.org/10.1108/EC-10-2022-0650
Publisher
:Emerald Publishing Limited
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