Session Start Date

6-1-1988

Abstract

The 1986 API method was used to predict the capacities of steel pipe piles, in predominantly cohesionless soils, for thirty three axial load tests. The ratio of calculated to measured capacities (QC/QM) was found to range from 0.15 to 3.0 with a mean QC/QM of 0.74. Reconsideration of the soil properties in terms of standard penetration resistances, made it possible to reduce the scatter to the range of 0.65 to 1.23 with a mean value of 0.93. The large errors previously existing for short piles were eliminated. Analyses were equally accurate for piles in compression and tension. The factor of safety required to reduce the probability of overloading to only 1% was reduced from 4.5 to 1.5.

Department(s)

Civil, Architectural and Environmental Engineering

Appears In

International Conference on Case Histories in Geotechnical Engineering

Meeting Name

Second Conference

Publisher

University of Missouri--Rolla

Publication Date

6-1-1988

Document Version

Final Version

Rights

© 1988 University of Missouri--Rolla, All rights reserved.

Document Type

Article - Conference proceedings

File Type

text

Language

English

Share

 
COinS
 
Jun 1st, 12:00 AM

Axial Load Capacities of Steel Pipe Piles in Sand

The 1986 API method was used to predict the capacities of steel pipe piles, in predominantly cohesionless soils, for thirty three axial load tests. The ratio of calculated to measured capacities (QC/QM) was found to range from 0.15 to 3.0 with a mean QC/QM of 0.74. Reconsideration of the soil properties in terms of standard penetration resistances, made it possible to reduce the scatter to the range of 0.65 to 1.23 with a mean value of 0.93. The large errors previously existing for short piles were eliminated. Analyses were equally accurate for piles in compression and tension. The factor of safety required to reduce the probability of overloading to only 1% was reduced from 4.5 to 1.5.