南非布洛克兰斯拱桥建成于1983年,跨径272m,是非洲最大跨径的混凝土拱桥,在当时同类桥型中名列世界第四,至今仍是世界跨径第七大的混凝土拱桥。布洛克兰斯拱桥桥面离河床底216m,十分雄伟壮观。拱圈采用临时塔架悬臂吊装法并由河堤两岸向中央对称施工,450m长的连续预应力混凝土桥面板采用滑模法逐段现浇施工。 The Arch Bridge was built in 1983 and has a span of 272m. It is the largest span concrete bridge in Africa, ranking fourth in the world at that time and still the seventh largest concrete arch bridge in the world. Broken Lance Arch Bridge deck 216m from the bottom of the river, very magnificent. The arch ring adopts the temporary tower cantilever hoisting method and is symmetrically constructed from both sides of the embankment to the center. A continuous prestressed concrete deck slab of 450 m in length is cast-in-place by a sliding mode.