台背填土沉陷是造成桥头跳车的主要原因。目前,已引起筑路工作者的密切关注。烟威一级汽车专用公路在路基小桥涵工程施工的初期,工程指挥部的干部和技术人员曾对如何填土的技术处理做专题研究,认为,通车后的桥头跳车,主要的原因是台背填土不密实,引起路基下沉。因此,建议在施工过程中要引起注意,及时采取措施. The backfill subsidence is the main reason for the bridgehead jumping. At present, it has aroused close attention of road construction workers. In the early stages of the construction of subgrade and small bridge subgrade, cadres and technicians from engineering headquarters had conducted special studies on the technical handling of how to fill the soil. It was believed that the main reason for the bridge jumping after the opening of the bridge was that Backfill soil is not dense, causing the subgrade to sink. Therefore, it is recommended to pay attention to the construction process, take timely measures.