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Recent content by sylvaninhoo

  1. sylvaninhoo

    Undisturbed vs. remoulded shear strength

    Thanks everybody for these profitable posts The bottom of this is the analysis of subsea pipelines laid on seabed - and in particular how much they self-embed. The soil is described as very soft clay with Su = 5 kPa (or 100 psf !) at suface, linearly increasing to 40 kPA at 33m depth. I have...
  2. sylvaninhoo

    Undisturbed vs. remoulded shear strength

    Pipeline engineer with only limited knowledge in soil mechanics: A seabed soil is described as clay with undrained shear strength of 5 kPa (21 psf). I am assuming this is the undisturbed shear strength. What would be the typical upper bound and lower bound values for the ratio undisturbed to...
  3. sylvaninhoo

    End cap force / hoop stress on pipes with thick coating

    Thanks - I was rather thinking in terms of ext pressure effects. The pressure field is acting over the coating circumference which is in our case significantly different from the steel diameter: The end-cap force calculated based on the overall dia. is then the total (steel + coating) force -...
  4. sylvaninhoo

    End cap force / hoop stress on pipes with thick coating

    Any thoughts on how to calculate the end-cap force and hoop stress on submerged pipelines with thick coating material ? Many thanks

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