REINFORCING OF SOFT COHESIVE SOILS WITH STONE COLUMNS

THIS PAPER DESCRIBES THE USE OF STONE COLUMNS FOR IMPROVING THE STRENGTH AND CONSOLIDATION CHARACTERISTICS OF SOFT CLAYS. THE HISTORY OF STONE COLUMNS, WHICH CONSIST OF COMPACTED GRANULAR MATERIAL, IS GIVEN. THEY ARE DESIGNED EMPIRICALLY AND THIS PAPER CONSIDERS THE BEHAVIOUR OF THE SOIL AND COLUMNS SEPARATELY WITHOUT INCLUDING THEIR EFFECT ON EACH OTHER. MODEL EXPERIMENTS ARE DESCRIBED IN WHICH RADIOGRAPHIC TECHNIQUES WERE USED TO DETERMINE THE BEHAVIOUR OF A SINGLE COLUMN IN A UNIFORM NORMALLY CONSOLIDATED CLAY. PATTERNS OF VERTICAL AND RADIAL DEFORMATIONS WITHIN THE COLUMN ARE SHOWN. THE RESULTS SHOW THAT THE ULTIMATE STRENGTH OF AN ISOLATED COLUMN, LOADED BY ITS TOP ONLY, IS GOVERNED BY THE MAXIMUM LATERAL REACTION OF THE SOIL AROUND THE BULGING ZONE. SIMPLE RESULTS OF PLASTICITY THEORY ARE USED TO PREDICT THE LIMITING LOAD AND MINIMUM LENGTH OF A STONE COLUMN, AND A DESIGN PROCEDURE HAS BEEN ESTABLISHED. THE EFFECTIVENESS OF GROUPS OF COLUMNS AT REDUCING SETTLEMENTS UNDER WIDESPREAD LOADS IS CONSIDERED. STONE COLUMNS ARE IDEAL FOR LIGHT LOADS BUT ARE UNSUITABLE FOR HEAVY LOADS BECAUSE THEY CANNOT TRANSFER THE APPLIED STRESSES TO THE DEEPER LAYERS OF SOIL.

  • Availability:
  • Corporate Authors:

    Foundation Publications Limited

    7 Ongar Road
    Brentwood CM15 9AU, Essex,   England 
  • Authors:
    • Hugher, JMO
    • Withers, N J
  • Publication Date: 1974-4

Media Info

  • Features: Figures; Photos; References;
  • Pagination: p. 42-49
  • Serial:
    • GROUND ENGINEERING
    • Volume: 7
    • Issue Number: 3
    • Publisher: EMAP CONSTRUCT LIMITED
    • ISSN: 0017-4653

Subject/Index Terms

Filing Info

  • Accession Number: 00081350
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: Apr 8 1975 12:00AM