A change in the deck length under temperature load a ects the upper part of integral bridge abutments and causes abutment rotation. The deck contraction makes the abutment move away from the back ll and causes wedge failure. To prevent wedge failure, a new method has been proposed. In this method, the inhibition of integral bridges under contraction is done by cables connected from each abutment to the buried piles outside the bridge along the abutments. In the analysis, the behavior of soil around the abutment and buried piles is an important parameter that has great in uence on the results. In this paper, the soil behavior around a laterally loaded stub abutment and buried piles was studied by laboratory stub abutment models using the PIV (Particle Image Velocimetry) method. The PIV analysis was carried out to obtain the deformation pattern and shear strains of the soil around the stub abutment and buried piles. The e ects of piles number and soil-pile interaction on the soil deformation pattern were investigated. The results showed that the use of buried piles connected by the cable prevented wedge failure in the back ll.
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