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Practical Considerations For the Design of Drilled Shaft Foundations
A review of practical considerations for the design of drilled shaft foundations is presented. The general topic areas are issues related to designing for ease of constructability, reinforced concrete design, designing for axial loading, designing for lateral loading, and construction specifications. Issues discussed for designing for constructability include understanding of the construction processes by the design engineer, proper sizing of the foundation, compatibility of concrete mix design and reinforcing steel detailing, and plans and specifications of good quality. Subjects discussed for designing for axial loading are the information required to complete a complete design and utilization of bearing graphs to identify economic foundation dimensions. Areas discussed for designing for lateral loading include a suggested design strategy for lateral loading, a discussion of the effects of eccentricity due to permissible variation in shaft location. Issues discussed for reinforced concrete design are how number of longitudinal bars affect moment capacity in different directions of loading, use of cracked section analyses to evaluate nonlinear bending stiffness, and when shear capacity might control the section design. Additional topics discussed are use of inadequate data from geotechnical soil investigations, performance of design computations by individuals without proper training and education, poor quality inspection, and lack of comprehensive reviews of final designs. A successful design for a drilled shaft foundation should be easy to build without defects, economical in dimensions and use of materials, and be able to perform in the manner anticipated by the design engineer.
Practical Considerations For the Design of Drilled Shaft Foundations
A review of practical considerations for the design of drilled shaft foundations is presented. The general topic areas are issues related to designing for ease of constructability, reinforced concrete design, designing for axial loading, designing for lateral loading, and construction specifications. Issues discussed for designing for constructability include understanding of the construction processes by the design engineer, proper sizing of the foundation, compatibility of concrete mix design and reinforcing steel detailing, and plans and specifications of good quality. Subjects discussed for designing for axial loading are the information required to complete a complete design and utilization of bearing graphs to identify economic foundation dimensions. Areas discussed for designing for lateral loading include a suggested design strategy for lateral loading, a discussion of the effects of eccentricity due to permissible variation in shaft location. Issues discussed for reinforced concrete design are how number of longitudinal bars affect moment capacity in different directions of loading, use of cracked section analyses to evaluate nonlinear bending stiffness, and when shear capacity might control the section design. Additional topics discussed are use of inadequate data from geotechnical soil investigations, performance of design computations by individuals without proper training and education, poor quality inspection, and lack of comprehensive reviews of final designs. A successful design for a drilled shaft foundation should be easy to build without defects, economical in dimensions and use of materials, and be able to perform in the manner anticipated by the design engineer.
Practical Considerations For the Design of Drilled Shaft Foundations
Isenhower, W. M. (author)
Geo-Frontiers Congress 2005 ; 2005 ; Austin, Texas, United States
2005-10-09
Conference paper
Electronic Resource
English
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