Alternative Title

Paper No. 3.06

Location

St. Louis, Missouri

Date

11 Mar 1998, 1:30 pm - 4:00 pm

Abstract

A case history on the design and installation of pile foundations for support two taxiway bridges at the MidAmerica Airport is presented. The pile foundations included the use of heavy HP steel piles designed as friction piles embedded in a stiff clayey silt till. Typical pile foundations in the area consist of H-piles or closed-ended pipe piles driven to bedrock. The use of slightly shorter friction piles allowed substantial savings due to the large number of piles required to support the heavily-loaded bridges. An extensive dynamic testing program was performed to measure allowable pile capacities and soil setup. The taxiway was constructed across a wetlands area with soft, compressible soils where embankment loads caused up to 1-1/2 feet of settlement and negative skin friction on the piles. Longer piles with the same cross sectional area were used to offset the negative skin friction.

Department(s)

Civil, Architectural and Environmental Engineering

Meeting Name

4th Conference of the International Conference on Case Histories in Geotechnical Engineering

Publisher

University of Missouri--Rolla

Document Version

Final Version

Rights

© 1998 University of Missouri--Rolla, All rights reserved.

Document Type

Article - Conference proceedings

File Type

text

Language

English

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Results of Dynamic Testing on Friction H-piles

St. Louis, Missouri

A case history on the design and installation of pile foundations for support two taxiway bridges at the MidAmerica Airport is presented. The pile foundations included the use of heavy HP steel piles designed as friction piles embedded in a stiff clayey silt till. Typical pile foundations in the area consist of H-piles or closed-ended pipe piles driven to bedrock. The use of slightly shorter friction piles allowed substantial savings due to the large number of piles required to support the heavily-loaded bridges. An extensive dynamic testing program was performed to measure allowable pile capacities and soil setup. The taxiway was constructed across a wetlands area with soft, compressible soils where embankment loads caused up to 1-1/2 feet of settlement and negative skin friction on the piles. Longer piles with the same cross sectional area were used to offset the negative skin friction.