Abstract: As the scale of shield tunnel construction in China increases year by year, a large amount of abandoned soil and slurry is produced continuously. The treatment and disposal of these tunnel abandoned soil and slurry have a certain impact on the urban environment and economic development. Therefore, it is necessary to summarize the treatment and utilization technology and the existing problems of the abandoned soil and slurry. The current situation of the abandoned soil and slurry treatment and utilization in China are analyzed and summarized. The abandoned soil and slurry is classified according to five indexes including gradation, water content ratio, penetration index, unconfined compressive strength, and California bearing ratio, and the properties of improved soil are evaluated. The treatment techniques for abandoned soil and slurry are summarized as simple screening, direct utilization, soil improvement, dehydration, and firing. Additionally, four resource utilization directions are pointed out as back filled soil, filled soil, embankment, and subgrade based on relevant applicable experience in Japan. The economic benefits of resource utilization of abandoned soil and slurry are considerable according to cases study. Finally, the existing problems of the treatment and disposal of abandoned soil and slurry are analyzed and summarized. The results obtained can provide references for green and sustainable utilization of abandoned soil and slurry.

Key words: shield tunnel, abandoned soil and slurry, classification, treatment and disposal, resource utilization