METHODS FOR RAFT FOUNDATION DESIGN INCLUDING SOIL STRUCTURE INTERACTION

Existing raft foundation design methods are discussed. A computer model for rectangular rafts on a layered soil system has been used to obtain graphical solutions for settlements and maximum bending moments in a uniformly loaded square raft resting on a homogeneous soil layer of finite depth. A simple hand calculation of an equivalent modulus and Poisson's ratio extends the applicability of the graphical solutions to multi-layered soil systems. The importance of considering the rigidity of the superstructure is emphasized by comparing the results of alternative analytical methods. /TRRL/

• Supplemental Notes:
  • Symposium on Raft Foundations, Perth, Wa., 1975.
• Corporate Authors:

  Commonwealth Scientific Indus Res Org, Australia

  Division of Applied Geomechanics
  East Melbourne, Victoria,   Australia 
• Authors:
  • Wardle, L J
  • FRASER, R A
• Conference:
  • Symposium on Raft Foundations, Perth, Wa., 1975.
• Publication Date: 1975

Language

• English

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 1-11

Subject/Index Terms

• TRT Terms: Bending moments; Calculation; Computer programs; Conferences; Deflection; Depth; Design; Design methods; Digital computers; Foundations; Ground settlement; Hand; Homogeneity; Loads; Mat foundations; Methodology; Moments (Mechanics); Pavement layers; Poisson distributions; Poisson ratio; Soil mechanics; Soil structure; Soils; Stiffness; Superstructures; Torque
• Uncontrolled Terms: Equivalent
• Old TRIS Terms: Poissons ratio
• ITRD Terms: 6464: Calculation; 8525: Conference; 5586: Deflection; 6499: Depth; 9011: Design (overall design); 8673: Digital computer; 9019: Equivalent; 3377: Foundation; 2002: Hand (human); 5916: Homogeneity; 5567: Load; 9102: Method; 5410: Moment (force); 2931: Multicourse; 5924: Poisson's ratio; 5792: Settlement; 3397: Shallow foundation; 4156: Soil; 5755: Soil mechanics; 5931: Stiffness
• Subject Areas: Bridges and other structures; Design; Geotechnology; Highways; I20: Design and Planning of Transport Infrastructure;

Filing Info

• Accession Number: 00164311
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Report/Paper Numbers: Analytic
• Files: ITRD, TRIS
• Created Date: Jan 13 1978 12:00AM