The Research Of The Construction Technique Of Qinjiatuo Super Bridge For Three Gorges Project

Qinjiatuo Bridge for Three Gorges Project is a super bridge over the approach of the sea-route on lower reaches of the temporary lock. The bridge is 303.10m in length. The bridge is the heaviest-loaded bridge in Asia at present,whose design loads are automobile-135 and trailer-660. The superstructure of the bridge is a three-span (80m+130m+80m) continuous rigid frame. The main piers are single-column flexible solid piers,whose foundation are 2.0m dug piles. The abutments are light-type box abutments,whose foundation are 1.2m bored cast-in-place piles. The paper sums up the construction technique of Qinjiatuo Super Bridge in all:consolidating the soft ground foundation with vibrating & impacting macadam piles;constructing the bored cast-in-place piles under the complex geological condition;developing and researching cable-stayed handling basket with the bearing capacity of 3000kN;beam construction;construction technique of the new type bridge deck and dynamic & static load test. It is helpful to the construction of the bridges with the same type.