ARCHING IN SOIL DUE TO THE DEFLECTION OF A RIGID HORIZONTAL STRIP

When one part of the support of the soil settles relative to the other parts of the support, the pressure on the deflecting support reduces with a corresponding increase of pressure on the neighboring parts. This transfer of pressure from the deflecting part to the neighboring soil is known as the arching effect. In the present study, the amount of arching, that is, the amount of pressure transferred to the neighboring soil when a rigid horizontal support buried under a soil cover of finite depth deflects, is investigated. The surface of the soil is subjected to to high overpressure. The soil is assumed ideal characterized by modulus of elasticity E, and Poisson's ratio, Mu. Solutions based on the equations of plane strain are obtained in the form of infinite series. Since soil cannot be expected to be effective in tension, a condition is imposed that the net pressure on the deflecting base cannot be tensile. It is shown that arching in this case is a function of the parameters b/h, ph/dE, and Mu, where 2b is the width of this base, h is the depth of soil, p is the pressure on the base with no displacement and d is the amount of base displacement. The first six terms of the infinite series solution are evaluated using a digital computer for a wide range of parameters. Graphs are presented showing the pressure distribution on the base, and the amount of arching over the base. An example is given to demonstrate the use of these plots. /Author/

Media Info

  • Features: Figures; References;
  • Pagination: p. 356-377

Subject/Index Terms

Filing Info

  • Accession Number: 00264374
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jan 16 1975 12:00AM