Abstract: The buried pipes will be destroyed under traffic loading, which will have a great influence on the economy and life in this area. In recent years, waste rubber tire particles mixed with soil are gradually used as backfill soil for subgrade and other fields. In this paper, the dynamic characteristics of pipe buried in rubber-silt lightweight mixtures under impact loading were investigated. In this study, 0%, 10%, 20% and 30% waste tire particles were added into the foundation soil by equal volume replacement method. The vibration absorption performance of light mixed soil as subgrade filler was studied through the surface settlement of subgrade and the deformation characteristics of buried pipeline. The results show that the addition of rubber particles to silty soil can effectively reduce the surface settlement of model soil. The settlement reduction is the most obvious with the 10% rubber content. The buried pipe shows a shape of "flattening" under impact loading. The addition of rubber particles can significantly reduce the strain and bending moment response of the buried pipe. When the rubber content is 20% and 30%, the strain and bending moment of the buried pipe decrease more obviously.

Key words: buried pipe, impact loading, rubber, surface settlement, strain