Bituminous concrete facings for earth and rockfill. 土石坝的沥青混凝土面层。
In condition of meeting dam safety and structural requirements of the premise,how to optimize dam material subarea to save investment is an important issue. 在满足坝体安全及结构要求的前提下，如何进行坝料分区设计以节省投资是高土石坝设计的重要课题。
