An innovative foundation solution, namely, the large step-tapered hollow pile, is presented. The pile uses large and stepped cross-sections, thereby involving significant skin friction, and is hollow inside to reduce the self-weight and construction cost. The pile is recognized as a desirable foundation solution where the underlying layers are problematic, and the upper overlying layers must bear major loads. The pile is employed to bear the load of an overpass bridge in a karst area. The pile-soil interactions are examined and modeled in terms of time-dependent creep. A load-transfer model based on the disturbed state concept is developed and implemented to numerical simulations. Parametric studies on pile geometry and pile-soil properties are conducted to optimize the pile design.
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Translated from Osnovaniya, Fundamenty i Mekhanika Gruntov, No. 2, March-April, 2023.
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Jiang, S., Huang, M., Deng, A. et al. A Time-Dependent Load-Transfer Model for Large Step-Tapered Hollow Piles Based on the Disturbed State Concept. Soil Mech Found Eng 60, 141–148 (2023). https://doi.org/10.1007/s11204-023-09875-2
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DOI: https://doi.org/10.1007/s11204-023-09875-2