Internal Reinforcement of Backfill behind Bridge Abutments to Mitigate Approach Slab Distresses
| 项目名称： | Internal Reinforcement of Backfill behind Bridge Abutments to Mitigate Approach Slab Distresses |
| 摘要： | When embankments are constructed to approach bridge abutments, an uneven approach slab condition often occurs. This uneven approach slab condition is caused by the differential settlement between the embankment soil and the abutment, and the resulting deformation or fracture of the bridge approach slab. Embankment soil settlement is often induced by thermal expansion/shrinkage of the bridge deck, resulting in movement of the abutment and the embankment soil. Traffic loading on the approach slab also induces settlement of embankment soil. Embankment soil settlement causes the approach slab of the bridge to lose its support from the soil. When the soil support is lost, the slab will bend and even break under the worst case. The loads on the deformed slab will redistribute to its ends, which may result in faulting and bump formation across the roadway at the ends of the approach slab. Such problems have repeatedly occurred in KDOT projects, posed risks to the safety of vehicles and drivers, and required repeated maintenance, repair, and even re-construction. To mitigate the above problems, internal reinforcement is proposed in this research to minimize embankment soil movement behind abutments and under approach slabs. The geosynthetic reinforcement is expected to minimize embankment soil settlement behind the abutment and under the approach slab. The objective of this research is to evaluate the performance of internal reinforcement to mitigate approach slab distresses using large scale model testing in the laboratory. |
| 状态： | Active |
| 资金： | 73,810 |
| 资助组织： | Kansas Department of Transportation |
| 项目负责人： | Metheny, Luke |
| 执行机构： | University of Kansas, Lawrence |
| 主要研究人员： | Parsons, Robert L |
| 开始时间： | 20180701 |
| 预计完成日期： | 20200730 |
| 实际结束时间： | 0 |
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