United States Department of Transportation
i
Integral Abutment Bridge for Louisiana’s Soft and Stiff Soils [Project Capsule]
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2008-02-01
[PDF-149.51 KB]
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Alternative Title:LTRC research project capsule : technology transfer program : 07-4ST.
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Abstract:The proposed research will be to field instrument, monitor, and analyze the design and construction of full integral abutment bridges for Louisiana’s soft and stiff soil conditions. Comparison of results will be submitted to the Louisiana Department of Transportation and Development (LADOTD) Bridge Design and Geotechnical Sections in the form of guidelines to incorporate in future designs. The objective of the study will address the following: 1. instrumentation and monitoring of piles, embankment/backfill, abutment, and bridge at two sites representing soft and stiff soil conditions, 2. behavior of the backfill material and surrounding soil under the cyclic abutment displacement, 3. behavior of the pavement and approach slab near the abutment, 4. pile and soil interaction, 5. abutment wall and soil interaction, 6. approach slab and soil interaction, 7. effects of temperature and longitudinal movement.
The overall performance of the two bridges (one with soft soils in Jefferson parish and the other with stiff soils in Caddo parish) will be monitored. The superstructures will be analyzed for thermal movement. The steel piles, abutment wall, backfill material and soils under approach slab will be instrumented to measure the pile deformation, the soil pressure, and the rotation of the abutment wall due to loads transferred from the superstructures and subsurface deformation.
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