Abstract: As an innovative back fil material, the foamed concrete has the advantages having light weight and high flowability and workability. In recent years, it has received a wider application of constructing embankment over soft compressible soils as well as in back filling the bridge abutments. This paper presents a case history of a bridge abutment with the foamed concrete in the A6 Contract Section that consisting of deep soft soils in Xiapu, Fujian. The construction aspects of the foam concrete replacement embankment are discussed in the paper. The field monitoring results confirmed that the material can be applied to the deep soft foundation of the bridge abutments in terms of reducing the potential settlement. The results indicate that the construction schedule can be shortened with minimized and satisfactory embankment settlement.

Key words: Foamed Concrete, Soft Soil Improvement, Construction Technique, Field Monitoring Results, Subsurface Soil Settlement