Key Technologies in Design and Construction of Large-span Segmental Prefabricated Bridge
The main bridge of the Fuchun River Bridge is a Y-pier continuous rigid frame box girder bridge,and is constructed with the precast segmental cantilever assembly.Its span layout is(85+2 x 151+85)m.Taking this bridge as an engineering case,according to the characteristics of the long-span segmental prefabricated box girder bridge,the design essentials of segment division,joint form,shear key structure,temporary anchoring structure,temporary prestressing structure and external prestressing system are emphatically introduced.At the same time,the key stress positions of anchoring zone and turning block are specially checked and calculated.At last,the key construction techniques in the short-line prefabrication of segmental girder,the hoisting and aligning of girder segment,the gumming and the temporary prestressing are set forth.The related construction methods can be referred for the design and construction of the similar bridges.
long spancontinuous rigid frameprefabricationshort-line methoddesign and construction
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