The hollow concrete has been filled in the interface between abutment and approach embankment . it is successful to solve the problem of poor compaction near the abutment because of restricted access . it is also very useful to drainage of the embankment 本文还对大孔隙混凝土这一材料进行试验分析,提出了台背一定范围内采用大孔隙混凝土填筑,可以解决台背一定范围内的土体不易压实和台背排水等问题。