ESWP: International Bridge Conference®: GeoTechnical

GeoTechnical

Tuesday, June 3, 2008
1:30PM to 5:00PM

Chair: Thomas G. Leech, PE, SE, Gannett Fleming, Inc., Pittsburgh, PA

IBC 08-37 - Field-Measured Behavior of an Integral Abutment Bridge with Short Steel Pile-Supported Abutments
William Davids, Thomas Sandford, University of Maine, Orono, ME; Sara Ashley, SW Cole Engineering Inc., Norwood, MA; John DeLano, GZA Geoenvironmental Inc., Norwood, MA; Christopher Lyons, E/Pro Engineering, Augusta, ME

The response of an instrumented IAB with short HP-supported foundations in western Maine is discussed. Pile and bridge behavior during construction and due to seasonal temperature changes is presented. The results indicate that short HPs driven to bedrock without special tip details should perform well in IABs.

IBC 08-38 - Osterburg Cell Load Test - Allegheny River Bridge
Gene Lipovich, Suresh Gutta, American Geotechnical & Environmental Services, Inc., Canonsburg, PA

To allow a more efficient design, an osterberg load cell test was performed during the design phase on a full scale, 84 - inch diameter, and 110 - foot deep drilled shaft. Using the rock socket design parameters allowed by the load test, significant cost savings were realized by the turnpike commission.

IBC 08-39 - Settlement of Bridge Approach Embankments
Suresh Gutta, PhD, PE, Sebastian Lobo-Guerrero, PhD, Neil Styler, PhD, PE, American Geotechnical and Environmental Services, Inc., Canonsburg, PA; Neal W. Fannin, PE, PennDOT, District 2.0

Settlement of bridge approach embankments may cause 'bump' at the bridge ends, due to settlement of the embankment and/or settlement of foundation soils. Comparison of measured and predicted settlements and time rate of consolidation of the foundation soils at eighteen bridge abutments constructed within the new I-99 corridor were considered.

IBC 08-40 - Underpinning Pile Foundations of Adjacent Continuous Multi-Level Curved Steel Box Girder Structures
Matt Pierce, DMJM Harris, Pittsburgh, PA; Firooz Panah, DMJM Harris, Boston, MA

Construction of an LRT system in Pittsburgh, PA requires foundation underpinning of two adjacent multi-span steel structures. This paper details underpinning topics related to alternatives investigation, viaduct foundation load development, unique underpinning design approach, complex construction sequencing and tolerances, viaduct instrumentation and monitoring and current construction status.

IBC 08-41 - Metal Straps as Soil Reinforcement on Full Height Abutments
Wendy Haugeto, Mike Yang, Arjuna Ranasinghe, Michael Baker Jr., Inc., Princeton, NJ

The first application of metal soil straps to support the complete lateral load on a thirty (30) foot high Full Height Abutment was constructed in Mercer County, New Jersey on the Alexander Road Bridge. Thtough a case study of this bridge, this paper demonstrates the advantages of using metal straps to support the lateral load over a more conventional system that uses piles for this purpose.

IBC 08-42 - Engineering Use of Low-Strength Concrete In Highway Construction
Y Frank Chen, Penn State Harrisburg, Middletown, PA; Tom Imholte, Tom Rowader, Dan Hacker, Dawood Engineering, Enola, PA

This paper presents an acceptable engineering practice as related to the use of unreinforced Class C concrete in highway construction. The important issues including stability checks, thermal cracking, concrete mixture, and cost are discussed. Another objective of this paper is to address the concern on the use of low-strength material.

James D. Cooper Student Award Winner

IBC 08-43 - Simplified Nonlinear Numerical Analysis Method for Integral Abutment Bridges
WooSeok Kim, The Pennsylvania State University, University Park, PA

Due to the significant inelastic and hysteretic behavior of integral abutment bridges (IABs), long-term behavior typically presents the worst case for design. This paper presents simplified numerical modeling methodologies under thermal and time-dependent loads, and soil-structure interaction based on field monitoring of IABs on the I-99 corridor. The proposed numerical model provides accurate, long-term prediction of IAB behavior and response.

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