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Analyzing jack-up leg’s behavior during punch-through in jacking condition

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Year: 2011
COI code: OICIRAN04_019
Paper Language: English

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Authors Analyzing jack-up leg’s behavior during punch-through in jacking condition

  Mahdi Rasoulzadeh - MSc, Sahand University of Technology;
  AhmadReza Mostafa Gharabaghi - Associate professor, Sahand University of Technology;
  MohammadReza Chenaghlou - Associate Professor, Sahand University of Technology;


Failure in self-elevated jack-up units may happen during jacking operation under sever sea state conditions or may happen due to punch trough during the jacking operation. During installation and pre-loading procedure of jack-up units, the potential of unexpected punch through failure exists. This occurs when the spudcan pushes a locally strong zone of soil into underlying softer material which leads to rapid downward movement of related leg and consequently leading to the buckling or collapse of other legs. Therefore, the investigation of punch through in jack-up units during jacking operation is important. During jacking operation, the connection of legs to the hull is provided through the pinion which is different from the fixed form, so the proper modeling of its behavior is essential. In this paper, the punch through behavior of a typical jack-up unit during jacking operation is modeled by finite element software under different conditions. The results are compared and most critical conditions and their related critical points are investigated


jack-up rig, Punch through, Jacking operation, nonlinear static analysis

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COI code: OICIRAN04_019

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Rasoulzadeh, Mahdi; AhmadReza Mostafa Gharabaghi & MohammadReza Chenaghlou, 2011, Analyzing jack-up leg’s behavior during punch-through in jacking condition, 4TH International Conference on Offshore Industries, تهران, انجمن مهندسي دريايي ايران, the text, wherever referred to or an achievement of this article is mentioned, after mentioning the article, inside the parental, the following specifications are written.
First Time: (Rasoulzadeh, Mahdi; AhmadReza Mostafa Gharabaghi & MohammadReza Chenaghlou, 2011)
Second and more: (Rasoulzadeh; Mostafa Gharabaghi & Chenaghlou, 2011)
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The University/Research Center Information:
Type: state university
Paper No.: 3534
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