气泡轻质土在路基台背回填中的应用效果分析

Analysis on Application Effect of Bubble Light Soil in Backfilling behind Subgrade Abutment

摘要:

以气泡轻质土为研究对象，总结了气泡轻质土在路基台背回填中的应用特征；同时借助现场监测数据，研究分析了气泡轻质土在路基台背回填中的受力及变形性能。结果表明：气泡轻质土作为回填材料，可以很好地解决桥头跳车现象；当工程中地基承载力不足时，可采用气泡轻质土作为回填材料，降低地基负载；台背土压力远大于台侧土压力；随着时间的增长，台背土压力和台侧土压力逐渐趋于稳定，最终满足地基承载力的需求。

Abstract:

Taking the bubble light soil as the research object, the application characteristics of bubble light soil in the backfilling behind the subgrade abutment are summarized. At the same time, the stress and deformation properties of the bubble light soil in the backfilling behind the subgrade abutment are studied and analyzed by means of the field monitoring data. The result shows that as the backfilling material, the bubble light soil can solve the bump at the bridge head very well. When the bearing capacity of the foundation is insufficient during the construction, the bubble light soil can be used as backfill material to reduce the foundation load, and the soil pressure behind the abutment is much larger than that at the abutment side. With the increase of time, the soil pressure behind the abutment and at the abutment side tends to be stable, and finally meets the demand of foundation bearing capacity.