It is concluded that the duct grouting compactness of three bridges are poor,in which the sections without grouting in transverse and longitudinal ducts are 14.5% and 47.58% respectively.

• 调查结果表明；3座桥梁的孔道压浆密实程度均较差；其中梁体纵向、横向预应力孔道中无压浆的截面分别占调查总数的14.；5%25和47