Research on design and construction scheme of rectangular aqueduct of Middle Route Project of S-N Water Diversion

Taocha-Lushan section of Middle Route Project of S-N Water Diversion crosses plain area,and the construction of aqueduct is needed for water conveyance.In aqueduct design over Lihe River,for its long span,large design discharge and high requirement of engineering quality and durability,through comparison and optimization of schemes and types,the design of simply-support prestressed structure with rectangular open box-beam cross-section and the reinforced concrete hollow structure for pier are adopted.According to terrain condition of wide flood plain,sectioned assembling box-beam and bridge fabrication machine are chosen for construction.The procedure and construction technology for applying prestress of structure in precast stage are described in detail.