MATTRESS FOUNDATION BY GEOGRID ON SOFT CLAY UNDER REPEATED LOADING ---PROCEEDINGS OF THE INTERNATIONAL SYMPOSIUM ON THEORY AND PRACTICE OF EARTH REINFORCEMENT, FUKUOKA, KYUSHU, JAPAN, 5-7 OCTOBER 1988

Small scale model footing tests were carried out in order to ascertain the best geotextile type and layout for preventing settlement on unpaved roads founded on soft clay ground. Three types of geotextiles were tested: geomesh; geomesh-pipe; and geogrid. Three different geogrid layouts were used (planar; folding mattress; and cellular mattress). The ground consisted of reconstituted ariake clay sandwiched between layers of sand. Preconsolidation pressure of 0.1 kgf per square centimetre was applied until 100% primary consolidation of the clay was attained. Then an incremental cyclic vertical pressure of either 0.4 kgf or 0.1 kgf per square centimetre was applied to the surface of the soil at a frequency of 0.1 hz. The average number of load cycles was 130000. The effects of the various reinforcement types and layouts upon the soil under cyclic loading were measured by strain gauge and compared. It was found that the geogrid was more effective in reducing settlement than the geomesh, and that the cellular layout was better than the planar layout. The bag type geomattress containing gravel was better than the folding mattress type, probably because of the interlocking effect exerted between gravel and geogrid. For the covering abstract of the symposium see IRRD 818063.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/9061918200
• Corporate Authors:

  AA Balkema

  P.O. Box 1675
  Rotterdam,   Netherlands  BR-3000
• Authors:
  • YASUHARA, K
  • Hirao, K
  • HYODO, M
• Publication Date: 1988

Language

• English

Media Info

• Pagination: p. 251-6
• Serial:
  • Publication of: AA BALKEMA
  • Publisher: AA Balkema

Subject/Index Terms

• TRT Terms: Cartographic grids; Clay; Conferences; Foundations; Geotextiles; Gravel; Grids (Transmission lines); Layout; Mat foundations; Mechanically stabilized earth; Pavement design; Pressure; Repeated loads; Scale models; Soil mechanics; Structural models; Wire mesh
• Uncontrolled Terms: Low cost roads; Vertical
• Subject Areas: Bridges and other structures; Geotechnology; Highways; Pavements;

Filing Info

• Accession Number: 00487005
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• ISBN: 90-6191-820-0
• Files: ITRD, TRIS
• Created Date: Sep 30 1989 12:00AM