Validation of a countermeasure against pipe uplift during liquefaction
Validation of a countermeasure against pipe uplift during liquefaction
This study aims to find countermeasures to mitigate buried pipe uplift damage in earthquake-induced liquefied ground. By examining the effects of various countermeasures through centrifuge experiments and numerical analyses, considerations for countermeasure design were identified. The countermeasures using high-permeable materials in existing studies were judged to overlap with the other effects, so the effectiveness of pure high-permeable materials was investigated through centrifuge experiments and numerical analysis. Replacing the upper-side soil with high-permeable soil can reduce EPWP. However, it was found that the high-permeable material may generate pipe uplift-prone pressure conditions, which induce more uplift. In addition, a countermeasure using a horizontal plate designed by removing factors that promote pipe uplift, as mentioned in existing studies, was verified through numerical analysis. Using horizontal plates as a countermeasure is an effective way to mitigate pipe uplift by reducing the EPWP ratio around the pipe and increasing resisting soil volume against pipe uplift.
Hyuk Kee Hong; Tetsuo Tobita; K. Miyamoto; Y. Konishi
4th Asia-Pacific Conference on Physical Modelling in Geotechnics (ACPMG2024)
Other
https://doi.org/10.53243/ACPMG2024-31
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