DESIGN OF GEOSYNTHETIC REINFORCED EMBANKMENTS ON SOFT SOIL

The paper presents a systematic approach to the design of geosynthetic reinforced embankments on soft soil, together with a graphical approach to the stability analysis of the slopes of these embankments over soft clays with homogeneous clay fills. The design approach evaluates the embankment stability with respect to internal and external failure mechanisms. The design process has the following steps: (1) bearing capacity analysis; (2) global stability analysis; (3) elastic deformation analysis; (4) pull-out or anchorage analysis; and (5) lateral spreading analysis. Various assumptions are made in its specific procedures. For simplicity, the problem is treated as the design of a clay embankment on a clay foundation, and a method of modified circular stability analysis is used, which determines the most critical failure surface. Embankments with side slopes of 1:1, 1:2 and 1:3 are considered as illustrative examples, for which the analysis was conducted graphically, using the limit equilibrium method, with the aid of Lotus 1-2-3 spreadsheet software. Design charts are given for the three slopes, assuming tangential or horizontal reinforcement, and the reinforcement values for these two cases are compared. The charts give the strength of geosynthetic required to resist failures.

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  • Corporate Authors:

    Elsevier

    The Boulevard, Langford Lane
    Kidlington, Oxford  United Kingdom  OX5 1GB
  • Authors:
    • MANDAL, J N
    • JOSHI, A A
  • Publication Date: 1996-2

Language

  • English

Media Info

  • Features: References;
  • Pagination: p. 137-45
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00729175
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD
  • Created Date: Dec 12 1996 12:00AM