Title:
Design of Tie Bars for Large Drilled Pier Foundations
Author(s):
Gupta S. R. Davalath, Seshu Madhava Rao Adluri, and Murty K. S. Madugula
Publication:
Structural Journal
Volume:
90
Issue:
3
Appears on pages(s):
231-241
Keywords:
concretes: drilling; foundations; piers; reinforcing materials; structural design; structural engineering; ties (reinforcement); Design
DOI:
10.14359/4230
Date:
5/1/1993
Abstract:
Construction crews for large drilled pier foundations have been reporting difficulties in fabricating and placing reinforcing cages in drilled holes. The difficulty arises due to the flattening of the cage while it is kept in a horizontal position before placing in the desired location. To remedy this, the tie bars are to be designed to withstand construction stresses. Equations for designing tie bars for large drilled piers are presented, and recommendations for selecting tie bar spacing, tie bar size, and longitudinal bar size are discussed. For the benefit of practicing engineers, design curves and tables are provided.