COMBINING TERRATREL WITH GEOTEXTILES IN HIGHWAY CONSTRUCTION

This paper describes the Terratrel system for sloping retaining walls, and discusses some of its applications to roads in the UK. Terratrel was developed in the UK in 1987, as a system that was intended to be easy to build, precise, and flexible, so that different reinforcements could be used as appropriate for each application. Many thousands of structures have been built worldwide using the system, mostly for permanent steep slopes (typically 60 to 75 degrees) and for temporary works. In the A45 Stonebridge Improvement project near Birmingham Airport in 1995, geogrids were used as the reinforcing material in a Terratrel structure, for the first time in the UK. A new bridge there required substantial approach embankments, which were retained by conventional reinforced earth retaining walls on three sides, and a geogrid-reinforced Terratrel sloping embankment on the fourth side. The motorway widening work at the M1/M62 junction at Lofthouse interchange required 850m of reinforced steep slopes, using high adherence steel reinforcing strips. Perhaps the most impressive Terratrel structure was the Ro-Ro ramp on the English side of the Second Severn Crossing, which successfully combined the use of steel and geogrids. This was a 400m long, 6-14m high structure, which had to act as a ramp and loading jetty next to a precasting yard.

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  • Corporate Authors:

    INSTITUTION OF HIGHWAYS & TRANSPORTATION

    6 ENDSLEIGH STREET
    LONDON,   United Kingdom  WC1H 0DZ
  • Authors:
    • WORRALL, P K
  • Publication Date: 1995-12

Language

  • English

Media Info

  • Features: References;
  • Pagination: p. 12-3,15-6
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00720799
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD
  • Created Date: May 24 1996 12:00AM