Abstract: The placement and disposal of massive waste soils and minimization of the adverse effects on the environmental and geological effect induced by the underground space development in the urban area have received more and more attentions recently. This paper presents the large-scale waste soil fills in the Baozi Creek Basin of Wuhan case history. The subsurface conditions were comprehensively investigated and evaluated, and the geological and environmental effects of large-scale waste soil fills were analyzed. This paper also states that the large-scale soil fill changes the original topography, changes the conditions of groundwater and groundwater recharge, imposes an adverse effect on the groundwater and soil environment, and develops an unstable slope in fills. On the other hand, the soil fill will encroach on land resources, induce soil erosion. The improper handling of waste soil may even lead to safety hazards such as collapse, landslides, and mudslides. Suggestions of better utilization of the waste soils and minimizing the wide spread of waste soils are also proposed the paper.

Key words: waste soil fills, environmental and geological effects, baozi creek basin