UNSATURATED CONDITION BELOW THE GROUND WATER TABLE AND ITS EFFECT ON PORE PRESSURE, SOIL AND STRUCTURE DEFORMATION

Deep pit excavations below ground water level often cause large deformation such as ground heaving and bending of excavation linings, not expected during construction to the extent and direction, in which deformation occurred. Comparing these observations with considerations on the change of water pressure during construction, it can be shown that the compressibility of the pore fluid should be taken into consideration. The paper presents physical background and some results of numerical finite element calculations adopting a 3-phase model in order to simulate major loading phases during reconstruction work of an inland navigable lock. It is shown that unsaturated conditions in the porous medium below water level have a significant influence on stability of retaining wall structures. The danger of hydraulic failure caused by transient pore water pressure therefore consequently demands a new design concept.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/9058090477
• Corporate Authors:

  AA Balkema

  P.O. Box 1675
  Rotterdam,   Netherlands  BR-3000
• Authors:
  • Koehler, H J
  • Feddersen, I
  • Schwab, R
• Conference:
  • Twelfth European Conference on Soil Mechanics and Geotechnical Engineering (Proceedings)
  • Location: Amsterdam, Netherlands
  • Date: 1999-6-7 to 1999-6-10
• Publication Date: 1999

Language

• English

Media Info

• Features: Figures; References;
• Pagination: p. 1109-15

Subject/Index Terms

• TRT Terms: Compressibility; Deformation; Design; Excavations; Finite element method; Groundwater; Hydraulic structures; Pore pressure; Porous materials; Retaining walls
• Subject Areas: Design; Geotechnology; Highways; Hydraulics and Hydrology;

Filing Info

• Accession Number: 00782049
• Record Type: Publication
• ISBN: 9058090477
• Report/Paper Numbers: Volume 2
• Files: TRIS
• Created Date: Dec 29 2000 12:00AM