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Comparison of the Dynamic Properties and Undrained Shear Strengths of Offshore Calcareous Sand and Artificially Cemented Sand

[+] Author Affiliations
Celestino Valle, Beatriz I. Camacho, Kenneth H. Stokoe, II, Alan F. Rauch

University of Texas at Austin, Austin, TX

Paper No. OMAE2003-37091, pp. 133-141; 9 pages
  • ASME 2003 22nd International Conference on Offshore Mechanics and Arctic Engineering
  • Volume 1: Offshore Technology; Ocean Space Utilization
  • Cancun, Mexico, June 8–13, 2003
  • Conference Sponsors: Ocean, Offshore, and Arctic Engineering Division
  • ISBN: 0-7918-3681-9 | eISBN: 0-7918-3672-X
  • Copyright © 2003 by ASME


Calcareous sand specimens were obtained from Campeche Bay in the southern Gulf of Mexico. The dynamic properties of these specimens were measured in resonant column and torsional shear (RCTS) tests, while the undrained shear strength was measured in unconsolidated-undrained (UU) triaxial compression tests. For weakly cemented, natural materials like this, it is difficult to obtain reliable properties from laboratory tests because sampling and handling of the soil specimens damages the particle cementation to an unknown degree. Artificially cemented specimens can be studied to better understand this problem. In this work, the strength and dynamic properties of artificially cemented sand were also measured using RCTS and UU tests. The artificially cemented specimens were formed by mixing uniform sand with a sodium silicate solution. The degree of cementation was varied by using different sodium silicate concentrations. This approach could be used to reproduce cemented test specimens in the laboratory with similar mechanical properties as cemented offshore soils. The results from this limited study show that the small-strain dynamic properties measured in the laboratory, and their variation with confining pressure, clearly identifies disturbance in the calcareous soils.

Copyright © 2003 by ASME



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