Alternative Title

Paper No. 2.24

Location

St. Louis, Missouri

Session Start Date

3-8-1998

Session End Date

3-15-1998

Abstract

Interstate 15 Reconstruction Project includes rebuilding of 137 bridges; widening the existing three general purpose lane roadway to four general purpose lane with a HOV lane and an auxiliary lane roadway, and other associated work such as converting the existing diamond interchanges to single point urban interchanges (SPUI). The project will be built under a design-build procurement process and is anticipated to be completed in 4 ½ years by October of 2001. The subsurface soils beneath the corridor consist of lake deposits (Lake Bonneville), namely soft to medium stiff plastic clays, silts and loose to medium dense sands ranging in thickness over 150 meters. The shallow water table is generally 5 to 10 feet below natural grade. The soft clays have low shear strengths and are highly compressible under embankment loads. The Salt Lake segment of the Wasatch fault is approximately 3.5 kilometer to the cast of the highway corridor. The structures will have to be designed to meet the seismic criteria and take into account the high liquefaction potential of some of the saturated sand lenses. Stage 1 efforts included identification of the various subsurface conditions; evaluation of soil parameters; establishing guidelines for field investigations, laboratory testing; analysis; reporting etc. In addition, various project specific studies were carried out for the proposed reconstruction project, details of which are presented in the paper.

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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Stage 1 Geotechnical Studies for Interstate 15 Reconstruction Project, Salt Lake County, Utah

St. Louis, Missouri

Interstate 15 Reconstruction Project includes rebuilding of 137 bridges; widening the existing three general purpose lane roadway to four general purpose lane with a HOV lane and an auxiliary lane roadway, and other associated work such as converting the existing diamond interchanges to single point urban interchanges (SPUI). The project will be built under a design-build procurement process and is anticipated to be completed in 4 ½ years by October of 2001. The subsurface soils beneath the corridor consist of lake deposits (Lake Bonneville), namely soft to medium stiff plastic clays, silts and loose to medium dense sands ranging in thickness over 150 meters. The shallow water table is generally 5 to 10 feet below natural grade. The soft clays have low shear strengths and are highly compressible under embankment loads. The Salt Lake segment of the Wasatch fault is approximately 3.5 kilometer to the cast of the highway corridor. The structures will have to be designed to meet the seismic criteria and take into account the high liquefaction potential of some of the saturated sand lenses. Stage 1 efforts included identification of the various subsurface conditions; evaluation of soil parameters; establishing guidelines for field investigations, laboratory testing; analysis; reporting etc. In addition, various project specific studies were carried out for the proposed reconstruction project, details of which are presented in the paper.