A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Skin friction of piles in sand. Influence of sand compressibility and tip shape
Calcareous sands encountered in many zones of petroleum activity often cause difficult problems in the design and installation of foundation piles. Skin friction mobilized by piles driven into compressible calcareous sands is very low, often negligible. Drilled and grouted piles represent an interesting alternative technique but with a much higher realization cost. The work, essentially experimental, deals with the analysis of the influence of calcareous sand characteristics upon the skin friction of driven piles or grouted piles. Different types of laboratory tests were carried out in a pressure tank, calibration chamber and using a bidimensional model. The results show: . the non uniformity of skin friction along a driven pile; being greatest at the tip, with the skin friction dependent upon the tip shape, . the preponderant influence of sand compressibility on horizontal stresses. The coefficient of lateral earth pressure decreases when sand compressibility increases. . the skin friction mobilized by drilled and grouted piles essentially depends on the shape (angularity) and the size of the sand grains as well as the roughness of the grout sheath.
Skin friction of piles in sand. Influence of sand compressibility and tip shape
Calcareous sands encountered in many zones of petroleum activity often cause difficult problems in the design and installation of foundation piles. Skin friction mobilized by piles driven into compressible calcareous sands is very low, often negligible. Drilled and grouted piles represent an interesting alternative technique but with a much higher realization cost. The work, essentially experimental, deals with the analysis of the influence of calcareous sand characteristics upon the skin friction of driven piles or grouted piles. Different types of laboratory tests were carried out in a pressure tank, calibration chamber and using a bidimensional model. The results show: . the non uniformity of skin friction along a driven pile; being greatest at the tip, with the skin friction dependent upon the tip shape, . the preponderant influence of sand compressibility on horizontal stresses. The coefficient of lateral earth pressure decreases when sand compressibility increases. . the skin friction mobilized by drilled and grouted piles essentially depends on the shape (angularity) and the size of the sand grains as well as the roughness of the grout sheath.
Skin friction of piles in sand. Influence of sand compressibility and tip shape
R. Sid-Ahmed (author)
1989
195 pages
Report
No indication
English
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