Abstract:In order to alleviate the problem of bump at bridge head caused by the differential settlement in the road and bridge transition section with traditional lapping structure, the technology of resource utilization of engineering residue is introduced into the preparation of foam polymer soil. Its engineering properties and mechanical properties are studied through the laboratory tests. Combined with the specific engineering examples, the bearing capacity, strength and internal integrity of the subgrade and pavement are comprehensively evaluated. The research results show that the foam polymer soil has the good flexural strength, compressive strength, elastic modulus, dry wet cycle resistance and compressive fatigue resistance. The use of foam polymer soil as backfill behind abutment can significantly reduce the differential settlement of road bridge transition section. Compared with the conventional foam light soil, the foam polymer soil not only reduces the cement consumption, but also saves the cost, which has the significant economic, energy saving and environmental protection benefits. The research findings contribute to improve the stability and driving safety of road and bridge structures, and provide the reference and inspiration for similar projects.
