THE EFFECT OF A SHALLOW RIGID LAYER ON THE BEARING CAPACITY OF FOOTINGS ON COHESIONLESS SOILS

BABAGİRAY G., AKBAŞ S. O., ANIL Ö.

JOURNAL OF THE FACULTY OF ENGINEERING AND ARCHITECTURE OF GAZI UNIVERSITY, cilt.28, sa.1, ss.187-197, 2013 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 28 Sayı: 1
  • Basım Tarihi: 2013
  • Dergi Adı: JOURNAL OF THE FACULTY OF ENGINEERING AND ARCHITECTURE OF GAZI UNIVERSITY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, TR DİZİN (ULAKBİM)
  • Sayfa Sayıları: ss.187-197
  • Anahtar Kelimeler: Shallow Foundations, Bearing Capacity, Cohesionless Soils, Rigid Layer Effect
  • Gazi Üniversitesi Adresli: Evet

Özet

Traditionally, for footings on cohesionless soils, the bearing capacity factor N-gamma is modified if an underlying rigid layer exists within a depth (H) less than or equal to the width of the footing (H <= B). However, the validity of this practice has been challenged by some recent studies, which indicate that this modification should be applied for rigid layer depths of up to three times the width (H = 3B) for circular and square footings. In addition, there is no consensus on whether the shape factors should be modified for this condition as well, and if so, how. In this study, laboratory test results of axially loaded rigid square and rectangular footings on sand underlain by rigid bases at five different depths are presented. The results are discussed within the framework of the limiting value of H/B for which the bearing capacity should be modified considering the effect of the footing shape as well.