This article mainly aims at the internal mold used in the process of prefabricating box-girder and conducts researches on it's structural style, activity principle and so on.
主要针对预应力箱梁在预制过程中所须的内模，在结构形式、使用原理等方面进行了研究。
2
Cyclic bending tests of a boxgirder with longitudinal stiffeners were also carried out.
进行了纵筋加强箱形薄壁梁模型的循环弯曲试验。
3
The successful alternative was the cast - in - place segmental prestressed concrete boxgirder.