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In Situ Testing of Calcareous Sand?Campos Basin

by J. A. R. Ortigao, Sondotecnica SA, Rio de Janeiro, Brazil,
S. L. F. Capellao, Sondotecnica SA, Rio de Janeiro, Brazil,
M. Morrison, Sondotecnica SA, Rio de Janeiro, Brazil,
L. De Lamonica, Sondotecnica SA, Rio de Janeiro, Brazil,



Document Type: Proceeding Paper

Part of: Use of In Situ Tests in Geotechnical Engineering

Abstract:

Sampling and in situ testing were used to investigate soil conditions for the installation of offshore platforms at the Campos Basin, Brazil. At these sites calcareous sand formations varying in the degree of cementation were found. Cone penetration testing (CPT) proved to be an invaluable site investigation tool which, in conjunction with sampling and standard laboratory testing, enabled an assessment of engineering parameters for the calcareous sands. The method employed for CPT data analysis yielded friction values for the uncemented sands and friction plus cohesion data for the cemented material. A good agreement was observed between friction angles from CPT and laboratory testing for the uncemented sands.

Subject Headings: Penetration tests | Calcareous soils | Soil analysis | Cohesive soils | Offshore structures | Field tests | Sand (material) | Brazil | South America

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