This discussion comments on the causes of leaning of the tower of Pisa, settlement calculations, and the investigation and examination of evidence of failure. Analysis of penetration resistance data and construction history contradict the explanation that the towers initial tilting was due to the sand stratum being more compressible on the South side of the foundation. It is noted that: initial tilting was not due to differential consolidation of the underlying clay stratum; available record of tilting versus time is unreliable prior to 1800; the main course of irreversible tilting in a Southerly direction in probably overstressing of the soft clay stratum causing local shear failure; there need not be a direct relation between the rate of tilting and the rate of settlement of the center of the tower. An approach to examining evidence of the causes of failure is outlined.

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Filing Info

  • Accession Number: 00194482
  • Record Type: Publication
  • Report/Paper Numbers: Proceeding
  • Files: TRIS
  • Created Date: Jun 13 1979 12:00AM