Approximate analytical solutions for a cohesive fold-and-thrust wedge: some results for lateral variation in wedge properties and for finite wedge angle

R. C. Fletcher

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Abstract

An existing solution for a perfectly plastic fold-and-thrust wedge with finite wedge angle is shown to be invalid. An approximate solution for a cohesive Coulomb wedge is obtained under the restrictions of small wedge angle and a weak basal surface. The effect of lateral variation in wedge properties is explicitly included. Using a similar method, the exact solution for a perfectly plastic wedge with horizontal upper surface and large wedge angle β̄ is perturbed to give an approximate solution for a wedge with nonvanishing surface topography. The correction to the wedge profile obtained from the slender wedge approximation enters at β̄2. The correction yields a 6% maximum reduction in slope for a wedge angle of 15°. -Author

Original languageEnglish (US)
Pages (from-to)10,347-10,354
JournalJournal of Geophysical Research
Volume94
Issue numberB8
DOIs
StatePublished - 1989

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Forestry
  • Oceanography
  • Aquatic Science
  • Ecology
  • Water Science and Technology
  • Soil Science
  • Geochemistry and Petrology
  • Earth-Surface Processes
  • Atmospheric Science
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science
  • Palaeontology

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