Location

St. Louis, Missouri

Session Start Date

6-1-1993

Abstract

Foundation for the prestigious 235m. Delhi television tower commissioned in 1988 in New Delhi consists of 279 reinforced concrete piles of 500 mm diameter with 1250 KN load carrying capacity. The tower is resting on a circular pile cap 32 m. diameter with an average thickness of 2.5 m. Pile cap was designed assuming full rigid conditions at site. When it was noticed that the pile reinforcement was predominantly anchored to the layers of the pile cap reinforcement, it was apprehended that this arrangement does not ensure complete rigidity as assumed, but it makes it only partially flexible. This paper deals with detailed analysis of same pile cap allowing flexibility for calculating the pile forces and moments under the service loads. It was finally concluded after comparing the results of flexible pile cap thus obtained, with that of rigid pile cap, with respect to pile forces and maximum radial moments with reduced global gust factor of 1.21 that reinforcement and the thickness for the pile cap provided, were O.K. and needed no corrective measures.

Department(s)

Civil, Architectural and Environmental Engineering

Appears In

International Conference on Case Histories in Geotechnical Engineering

Meeting Name

Third Conference

Publisher

University of Missouri--Rolla

Publication Date

6-1-1993

Document Version

Final Version

Rights

© 1993 University of Missouri--Rolla, All rights reserved.

Document Type

Article - Conference proceedings

File Type

text

Language

English

Share

 
COinS
 
Jun 1st, 12:00 AM

Rigid vs. Flexible Pile Caps: Case Study for 235 m. Delhi T.V. Tower

St. Louis, Missouri

Foundation for the prestigious 235m. Delhi television tower commissioned in 1988 in New Delhi consists of 279 reinforced concrete piles of 500 mm diameter with 1250 KN load carrying capacity. The tower is resting on a circular pile cap 32 m. diameter with an average thickness of 2.5 m. Pile cap was designed assuming full rigid conditions at site. When it was noticed that the pile reinforcement was predominantly anchored to the layers of the pile cap reinforcement, it was apprehended that this arrangement does not ensure complete rigidity as assumed, but it makes it only partially flexible. This paper deals with detailed analysis of same pile cap allowing flexibility for calculating the pile forces and moments under the service loads. It was finally concluded after comparing the results of flexible pile cap thus obtained, with that of rigid pile cap, with respect to pile forces and maximum radial moments with reduced global gust factor of 1.21 that reinforcement and the thickness for the pile cap provided, were O.K. and needed no corrective measures.