Abstract
During the vertical extension of an existing building, the foundation would be subjected to additional loads vertically. In order to enhance bearing capacity and reduce settlement of the existing foundation, a new type of micropile named waveform micropile was applied to underpin the foundation in this study. Finite element method (FEM) was used to evaluate the micropile’s load-settlement behavior and the underpinning performance of the waveform micropile. The load distribution ratio (LDR) of existing piles and the reinforcing micropile was estimated before and after applying additional loads. The underpinning performance of a conventional micropile was also included for comparison with the waveform micopile. Numerical results load-settlement response for single pile showed bearing capacity of waveform micropiles was higher than that of conventional micropile because of the shape of the waveform micropile. Moreover, when the additional loads applied on the reinforced foundation, the waveform micropile showed better reinforcing performance compared to the conventional micropile.
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Acknowledgements
This research was supported by a grant from “Developing & Verifying the Cost Saving and Highly Efficient Remodeling Technologies of Vertical Extension for the Aged Multi-Family Housing” which is funded by the Korea Agency for Infrastructure Technology Advancement.
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Wang, C.C., Jang, Y.E., Kim, S.J., Han, J.T. (2019). Effect of Waveform Mircopile on Foundation Underpinning During Building Remodeling with Vertical Extension. In: Fatahi, B., Mwanza, A., Chang, D. (eds) Sustainable Design and Construction for Geomaterials and Geostructures. GeoChina 2018. Sustainable Civil Infrastructures. Springer, Cham. https://doi.org/10.1007/978-3-319-95753-1_10
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