Numerical investigation of geosynthetic-reinforced soil bridge abutments under static loading

Yewei Zheng, Patrick Joseph Fox

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

This paper presents a numerical investigation of the performance of geosynthetic-reinforced soil (GRS) bridge abutments under static loading conditions. Simulations were conducted using a finite-difference program to model the Founders/Meadows GRS bridge abutment during construction and service. Simulated results are in good agreement with field measurements, including displacements, lateral and vertical earth pressures, and tensile strains and forces in reinforcement. The simulations also indicate that horizontal restraint from the bridge structure has a significant influence on abutment deflections. A parametric study was then conducted to investigate the performance of a single-span full bridge system with two GRS abutments, including effects of bridge contact friction coefficient, backfill soil relative compaction, backfill soil cohesion, reinforcement spacing, reinforcement length, reinforcement stiffness, and bridge load. Results indicate that backfill soil relative compaction, reinforcement spacing, and bridge load have the most significant influence on lateral facing displacements and bridge footing settlements for GRS abutments. Differential settlements between the bridge footing and approach roadway were small for all simulated conditions.

Original languageEnglish (US)
Article number04016004
JournalJournal of Geotechnical and Geoenvironmental Engineering
Volume142
Issue number5
DOIs
StatePublished - May 1 2016

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Abutments (bridge)
geosynthetics
Soils
Reinforcement
reinforcement
soil
backfill
footing
Compaction
compaction
spacing
Displacement measurement
Tensile strain
earth pressure
Loads (forces)
cohesion
Earth (planet)
deflection
Stiffness
meadow

All Science Journal Classification (ASJC) codes

  • Environmental Science(all)
  • Geotechnical Engineering and Engineering Geology

Cite this

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title = "Numerical investigation of geosynthetic-reinforced soil bridge abutments under static loading",
abstract = "This paper presents a numerical investigation of the performance of geosynthetic-reinforced soil (GRS) bridge abutments under static loading conditions. Simulations were conducted using a finite-difference program to model the Founders/Meadows GRS bridge abutment during construction and service. Simulated results are in good agreement with field measurements, including displacements, lateral and vertical earth pressures, and tensile strains and forces in reinforcement. The simulations also indicate that horizontal restraint from the bridge structure has a significant influence on abutment deflections. A parametric study was then conducted to investigate the performance of a single-span full bridge system with two GRS abutments, including effects of bridge contact friction coefficient, backfill soil relative compaction, backfill soil cohesion, reinforcement spacing, reinforcement length, reinforcement stiffness, and bridge load. Results indicate that backfill soil relative compaction, reinforcement spacing, and bridge load have the most significant influence on lateral facing displacements and bridge footing settlements for GRS abutments. Differential settlements between the bridge footing and approach roadway were small for all simulated conditions.",
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