Abstract: To solve the common problem of uneven settlement of highway, this paper proposes a new technology for composited embankment by combining the replacement load shedding with reinforcement. In the new technology, the polyvinyl chloride (PVC) pipes are used to replace the embankment fill, which can not only reduce the self-weight load of the embankment but also exert the reinforcement of the circular tube at the same time. Thus, the additional stress of foundation is decreased, which controls the ground subsidence correspondingly. To verify the control effect of the technology on the uneven settlement of subgrade, a series of large-scale comparison model tests is carried out on the composited embankment and untreated ordinary embankment. Combining the settlement calculation theory and the measured results, the control mechanism of uneven settlement by the composited method is analyzed. The results provides a theoretical basis for the design and calculation theory of reinforced embankment and light replacement embankment.

Key words: uneven settlement, model test, replacement load shedding, reinforced embankment