Harbin sifangtai bridge is a cable-stayed bridge whose girder is composed by steel i-beam above and concrete deck slab below.
作为叠合梁斜拉桥，四方台大桥的主梁由下部的工字钢和上部的混凝土行车道板组合而成。
2
In order to let the slabs help the top chords of the steel trusses resist the giant compressive forces, slab truss composite structures are used throughout the main bridge.
Taking the construction of in-water base slab of Guixi Bridge as an example, the article introduces in more detail the design of the steel sleeve box and the technique of water-avoiding construction.