INFLUENCE OF SHEAR STRENGTH OF CNS LAYER ON SWELLING SOILS

The effects of cohesive non-swelling soil (cns) layer of different shear strength on the behaviour of underlying expansive soil are evaluated in the paper. The equipment used was specially designed to enable the measurement of both lateral pressure and upward movement of the inside soil system. The studies were conducted on cns layer of different thicknesses and on expansive soil compacted at various initial void ratios. The observations for lateral swelling pressure, vertical movement and density variation with depth, were taken. The changes in the density of expansive soil at the interface were also studied. The results indicate that the cns layer of a given thickness and shear strength generates nearly the same value of lateral swelling pressure in the underlying expansive soil mass of varying initial compaction void ratios. Cns layer of higher shear strength offers higher resistance to the swelling of underlying expansive soil. Attempts have been made to correlate the changes in lateral swelling pressure, vertical movement and density at the interface with the shear strength of cns layer. (TRRL)

  • Authors:
    • Kate, J M
    • Katti, R K
  • Publication Date: 1982-5

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Filing Info

  • Accession Number: 00388916
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD, TRIS
  • Created Date: Oct 30 1984 12:00AM