Session Start Date

6-1-1988

Abstract

A full-scale compressive load test was conducted on a drilled pier in the Pierre Shale Formation near Fort Collins, Colorado, to verify design parameters. The test pier was designed based on presumptive design criteria for both end-bearing and skin friction in the shale. The maximum test load of 6.7 MN (750 tons) resulted in a deflection of approximately 230 mm (9.0 in.). Instrumentation within the pier allowed determination of the actual end-bearing and skin friction values at various applied loads. Based on results of the test, production piers were redesigned for skin friction only and shear rings were added to enhance shaft resistance.

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

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Jun 1st, 12:00 AM

Drilled Pier Load Test, Fort Collins, Colorado

A full-scale compressive load test was conducted on a drilled pier in the Pierre Shale Formation near Fort Collins, Colorado, to verify design parameters. The test pier was designed based on presumptive design criteria for both end-bearing and skin friction in the shale. The maximum test load of 6.7 MN (750 tons) resulted in a deflection of approximately 230 mm (9.0 in.). Instrumentation within the pier allowed determination of the actual end-bearing and skin friction values at various applied loads. Based on results of the test, production piers were redesigned for skin friction only and shear rings were added to enhance shaft resistance.