Alternative Title

Paper No. 7.05

Location

St. Louis, Missouri

Session Start Date

3-8-1998

Session End Date

3-15-1998

Abstract

Parsons Brinckerhoff (PB) is acting as design consultant for the Nevada Department of Transportation (NDOT) for the Stage II Improvements to the 1-15/US 95 Interchange located in Las Vegas, Nevada. The improvements to the interchange include the design and construction of seven new bridge structures. All seven structures will use drilled shaft foundation systems for support. This paper describes the selection and design of the drilled shaft foundation systems for Ramp N-MLK, a sixteen span precast segmental box girder structure. Subsurface conditions and geotechnical data for the project site are described. A comprehensive design methodology was used, including consideration of service loads, seismic loads, creep and shrinkage. A procedure for determining the equivalent pier length to be used in the structural analysis was developed. A procedure to ensure plastic hinging above ground was developed. This procedure is presented, along with a comprehensive design example.

Department(s)

Civil, Architectural and Environmental Engineering

Appears In

International Conference on Case Histories in Geotechnical Engineering

Meeting Name

Fourth Conference

Publisher

University of Missouri--Rolla

Publication Date

3-8-1998

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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Selection and Design of Foundations for the I-15/US 95 Interchange, Stage II Improvements − A Case Study

St. Louis, Missouri

Parsons Brinckerhoff (PB) is acting as design consultant for the Nevada Department of Transportation (NDOT) for the Stage II Improvements to the 1-15/US 95 Interchange located in Las Vegas, Nevada. The improvements to the interchange include the design and construction of seven new bridge structures. All seven structures will use drilled shaft foundation systems for support. This paper describes the selection and design of the drilled shaft foundation systems for Ramp N-MLK, a sixteen span precast segmental box girder structure. Subsurface conditions and geotechnical data for the project site are described. A comprehensive design methodology was used, including consideration of service loads, seismic loads, creep and shrinkage. A procedure for determining the equivalent pier length to be used in the structural analysis was developed. A procedure to ensure plastic hinging above ground was developed. This procedure is presented, along with a comprehensive design example.