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• W3095996834 abstract "Abstract The jack-up platform will face the risk of punch-through failure when pilling in areas where a stronger-thinner layered soil overlays a softer soil layer. The punch-through failure that occurred in the South China Sea indicates that there are still shortcomings in the existing punch-through failure assessment methods. Therefore, this paper improves the shortcomings of the existing punch-through failure assessment method based on the simulation experiment. Firstly, the shortcomings of the existing punch-through failure assessment method were analyzed based on the case of punch-through incidents occurred in the South China Sea. Then, the main factors of punch-through were analyzed by means of simulation experiment, and the shortcomings of the existing method were improved. Meanwhile, a punch-through failure assessment method considering the spudcan tip height and loading process was established. Finally, taking a case of the South China Sea as an example, the improved model guided the penetration of jack-up platform and avoided punch-through failure successfully. By analyzing the case of the punch-through failure occurred in the South China Sea, the soil layer in which punch-through failure occurs has the characteristics that the thickness of stronger-thinner layered soil is close to the height of pile tip. In order to explore the main factors leading to punch-through failure, a set of experimental system simulating the spudcan punch-through was designed, and a series of punch-through simulation experiments were conducted. Simulation experiment results show that the reduction ratio of bearing capacity will decreases with the ratio of stronger-thinner layered soil thickness and pile tip height (d/h) increases. When the d/h is greater than 2, the reduction ratio of bearing capacity is less than 5%; When the pile tip height is equal to the thickness of stronger-thinner layered soil, the reduction ratio of bearing capacity is more than 95%. The innovation of this paper is that punch-through failure assessment method considering ratio of pile tip height and soil layer thickness was established." @default.
• W3095996834 created "2020-11-09" @default.
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• W3095996834 date "2020-10-27" @default.
• W3095996834 modified "2023-09-26" @default.
• W3095996834 title "A Model Testing to Improve Punch-Through Failure Assessment" @default.
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• W3095996834 doi "https://doi.org/10.4043/30070-ms" @default.
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