Abstract
In the recent times, many studies have been devoted toward rectangular excavations but only a few studies have considered the “corner effect” in the optimized design of soil nail wall-retaining pile-anchor cable supporting systems, especially in large-scale deep foundation pit environments excavated by the central-island technique. Corner effect not only increases the construction costs but also may pose a risk to the safety and stability of such pits. In this paper, changes in the lateral displacement of retaining pile, soil at 1 m away from the foundation pit, crown beam, and the settlement of ground surface and surrounding buildings were extensively investigated based on the field measurements and numerical simulations of a large-scale deep foundation pit in Gaoxin zone, **’an, China. In addition, the supporting structure was optimized by considering the lateral influence zone of the corner effect. The optimization scheme proposed in this study not only satisfies the safety requirements of foundation pit supports, but also reduces the construction costs.
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Acknowledgements
The authors are grateful to the National Key R&D Program of China (2020YFC1807200), National Natural Science Foundation of China (41877231 and 42072299), Colleges and Universities in Jiangsu Province Plans to Graduate Research and Innovation (Grant No. KYCX19-0098), Scientific Research Foundation of Graduate School of Southeast University (Grant No. YBPY1926), and Project of Jiangsu Provincial Transportation Engineering Construction Bureau (CX-2019GC02).
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Liu, L., Wu, R., Congress, S.S.C. et al. Design optimization of the soil nail wall-retaining pile-anchor cable supporting system in a large-scale deep foundation pit. Acta Geotech. 16, 2251–2274 (2021). https://doi.org/10.1007/s11440-021-01154-4
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DOI: https://doi.org/10.1007/s11440-021-01154-4