t-girder造句

• Especially the bridge engineering has to be concerned with high , new and difficult technologies . new technologies firstly adopted are post - tensioned prestressed concrete simply - supported box girder , assembly two - way prestressed concrete simply - supported t - girder , reinforced concrete continuous rigid frame , and steel - concrete composite continuous girder . all these have formed a series of new bridge structures taking prestressed concrete simply - supported box girder as main feature
  由于秦沈客运专线的特殊技术要求，在铁路建设史上首次采用了后张法预应力混凝土箱形简支梁、装配式双向预应力混凝土t形简支梁、钢筋混凝土刚构连续梁、钢与混凝土结合连续梁等桥跨结构，形成了以预应力简支箱梁桥跨结构为主要特征的一系列桥梁新结构。