SETTLEMENTS IN ROAD EMBANKMENTS CONSTRUCTED IN THE WINTER

SAETTNINGAR HOS JORDBANKAR ANLAGDA UNDER VINTERN

Research and development is in progress to elucidate settlement properties of road embankments constructed in winter. Of the factors governing settlement, subsoil settlement can be influenced by removal of inferior material and vertical drains, and residual settlement by various measures, while deformations due to temperature and moisture are difficult to influence. Field tests comprised examination of borrow pits and embankment subsoil. Compaction of soil is easier, the drier and less cold it is. It must therefore be protected from cooling during excavation, transport, spreading and compaction. As soon as the soil was spread, compaction began. Temperature was continuously measured. Principal object was to find relationship between compaction method and results, and future settlement, under varying conditions. Bulk density determinations were made and embankment surface was monitored by levelling. Settlement in each compacted layer was also determined. Settlement was complete after the second summer season. A formula is proposed for prediction of settlement. Laboratory tests examined the effect of soil temperature and moisture. Requirements to prevent settlement are: 1. Low fill moisture content, 2. Removal of large frozen lumps, 3. Protection of fill from cooling before both excavation and compaction, 4. The colder the weather, the thinner the layer or the heavier the vibratory rollers. /TRRL/

  • Corporate Authors:

    Engwall and Strahle AG

    Brunkebergstorg 20/4
    Stockholm C,   Sweden 
  • Authors:
    • Oerbom, B
    • Lundgren, N
  • Publication Date: 1974

Language

  • Swedish

Media Info

  • Features: Figures; Tables;
  • Pagination: p. 23-29
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00125638
  • Record Type: Publication
  • Source Agency: Swedish National Road and Traffic Research Institute
  • Files: ITRD, TRIS
  • Created Date: Apr 7 1976 12:00AM