Joist type cable arch bridge structure and its construction method

• Main Author: XING,PENG SHANGGUAN
• Format: Patent
• Language: English
• Published: 17.10.2007
• Subjects: ASSEMBLY OF BRIDGES; CONSTRUCTION OF BRIDGES; CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES; FIXED CONSTRUCTIONS; OR VIADUCTS

A truss-type cable arch bridge structure is provided, whose last quarter main arch ring is composed of a plurality of arch steel pipes of the inner injecting concrete or the steel pipe to form the concrete truss-type main arch ring. The steel pipe concrete column is tightly fixed on the lower node of the last quarter main arch ring, while the upper end of the steel pipe concrete column is tightly fixed on the node of the first quarter driveway beam. The two ends of the inclined dragline equipped with an adjustable anchor nip are respectively fixed on the upper node and the lower node of the steel pipe concrete column adjoint the upper node. The construction method is that, the inclined dragline with the adjustable anchor nip is used to hoist the concrete truss-type main arch ring of the first unit, the steel pipe concrete column and the driveway beam from the bridge abutment on the two banks, and combined together; then to hoist the second unit, and the like, till the arch bridge folds, concrete is poured into each arch steel pipe or the steel box spar frame from the lower end; after forming a bridge, the inclined dragline at each node is adjusted for uniform stress on the entire arch. The invention can exert the cooperating combination, complementary advantages of different materials for the high strength steel cable, the steels and concrete etc, which is applicable for large span building the bridge in the V-shape valley of the a mountainous area.