Casing Issues during Construction of Drilled Shafts in Glacially Overconsolidated Soils

This article describes a case history in which temporary segmental casings became trapped in a deep glacially overconsolidated soil. The segmental casings were used to construct 2.5 m diameter drilled shafts to depths up to 30–35 m along the alignment of an elevated transportation structure. Although the advancement of the casings and excavation went smoothly, in several circumstances the casings became stuck during extraction. This situation resulted in abandonment of the concrete placement operation and extensive subsequent work to recover the casings. A recognition of the ground conditions causing this situation led to the identification of locations that could have similar problems and the development of a workable solution. Analytical and numerical analyses were conducted to support the qualitative understanding of the problem and are also described.

Language

  • English

Media Info

  • Media Type: Web
  • Pagination: pp 292-298
  • Monograph Title: Geo-Congress 2022: Deep Foundations, Earth Retention, and Underground Construction

Subject/Index Terms

Filing Info

  • Accession Number: 01846534
  • Record Type: Publication
  • ISBN: 9780784484029
  • Files: TRIS, ASCE
  • Created Date: May 24 2022 10:08AM