PORE WATER PRESSURE IN ANISOTROPIC MATERIALS

LA PRESION INTERSTICIAL EN MATERIALES ANISOTROPOS

The author explains by means of graphs that the stresses that develop within a separate elementary volume of a given material when subject to the pressure of a fluid from within are tensile forces equivalent to the product of the mechanical porosity times the pressure imposed on such fluid. The purpose of this article is to point out that it is not necessary to establish an equation in a triaxial state, but that this can be done in a uniaxial state, once the appropriate axis has been selected. In the same way as in a rational material the volume of matter in each elementary volume unit is the ratio existing between its linear elasticity rate (Young's modulus) and that of a poreless material, it turns out that in an anisotropic material the mechanical porosities, along the axis I is (1) I=1-(ei/eo), where I=1, 2, 3 ei is the Young's modulus of the material in the direction of axis I and eo is the Young's modulus of the poreless material; and the mechanical pressures in the direction of axis I due to the pore water pressure, is (2)I = - (3)I, where I = 1, 2, 3; (4)I is the mechanical porosity in the direction of axis I; and p is the water pressure outside the planes. (TRRL)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00348619
• Corporate Authors:

  Escuela de Ingenieros de Caminos Canales y Puertos

  Ciudad Universitaria
  Madrid 3,   Spain 
• Authors:
  • FERNANDEZ, M
• Publication Date: 1979-2

Language

• Spanish

Media Info

• Features: Figures; References;
• Pagination: p. 129-130
• Serial:
  • Revista de Obras Publicas
  • Publisher: Colegio de Ingenieros de Caminos
  • ISSN: 0034-8619

Subject/Index Terms

• TRT Terms: Building materials; Charts; Equations; Isotropy; Linear elasticity; Mathematical models; Modulus of elasticity; Pore water pressures; Porosity; Soil mechanics
• ITRD Terms: 6486: Chart; 5917: Isotropic; 4555: Material (constr); 6473: Mathematical model; 5919: Modulus of elasticity; 5762: Pore water pressure; 5938: Porosity
• Subject Areas: Geotechnology; Highways;

Filing Info

• Accession Number: 00309097
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Report/Paper Numbers: No. 3.166
• Files: ITRD, TRIS
• Created Date: Apr 22 1980 12:00AM