PREVENTIVE MEASURES AGAINST SLOPE EROSION: CRITERIA FOR SOIL EROSION

In formulating the problem of slope erosion in geotechnical terms, the tangential stress due to rain erosivity against the shear resistance of the soil is considered, and use is made of the concept of tractive force used in hydraulic engineering for flow in channels (this concept being extended to surface runoff on slopes) and of Coulombs Law which is generalized to shear resistance in soils subjected to such runoff. On the basis of studies of erodibility, swelling and petrifaction, criteria are suggested for the choice of erosion-resistant soils. The main parameters conditioning resistance of soils to erosion are grain-size, swelling the petrifaction. The methodology for selecting soils resistant to erosion must, therefore, be based on quantification of such characteristics taking into consideration that in the case of non-cohesive soils, the fundamental parameter is grain-size distribution, in the case of cohesive soils the parameter is swelling, and in the case of cut slopes, it is petrifaction. In order to establish limit values for these parameters, and thus establish specifications for erosion-resistant soils, it is necessary to carryout systematic studies on typical slopes in the main geo-climatic regions together with complementary laboratory research.

  • Corporate Authors:

    National Civil Engineering Laboratory, Portugal

    Avenida do Brasil
    Lisbon 5,   Portugal 
  • Authors:
    • Nascimento, U
    • de Castro, E
  • Publication Date: 1974

Media Info

  • Features: References;
  • Pagination: 19 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00097147
  • Record Type: Publication
  • Report/Paper Numbers: No. 451
  • Files: TRIS
  • Created Date: Sep 10 1975 12:00AM