Space special-shaped arch bridge and construction method thereof
A special-shaped, arch bridge technology, applied in the direction of arch bridges, bridge maintenance, bridge construction, etc., can solve the problems of urban landscape bridges such as single shape, high cost, and difficult construction, so as to improve lateral stiffness and overall space stability, save maintenance costs, The effect of simplifying the construction process
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Embodiment 1
[0038] like Figure 1-9 As shown in the present embodiment, a single-span 136m downward space special-shaped arch bridge includes left and right symmetrical support structures, a main girder 1 on the two support structures, and an arch rib structure on the main girder 1. , where the main girder adopts prestressed concrete simply supported box girder with multi-chamber fish-bellied section, the roof of the box girder is 40m wide, the width-span ratio is 1:3.4, the girder height is 3.5m, and the aspect ratio is 1:11.4; The bottom plate of the straight section at the bottom of the beam is 17.432m wide, and the bottom plate of the straight section and the side webs at both ends of the top plate are connected by a circular arc plate. The radius of the arc plate is 20m, and the thickness of the bottom plate of the straight section is 0.22m; The slab is the tie rod arrangement area and the arch rib anchorage area, so the thickness of the middle web is taken as 0.9m, and the thickness...
Embodiment 2
[0047] The construction method of a kind of space special-shaped arch bridge shown in the present embodiment is used for building the space special-shaped arch bridge described in embodiment 1, specifically comprises the following steps:
[0048] a. Build two left-right symmetrical support structures with an interval of 136m. The support structures include bridge piers, bridge caps and piles from top to bottom.
[0049] b. Construct or hoist the main girder on the two supporting structures, the main girder adopts a prestressed concrete simply supported box girder with multi-chamber fish belly type; for rivers and streams with deep water depth and conditions for using large floating cranes, The prefabricated main beam can be fixed on the two supporting structures by means of hoisting; for rivers and streams with shallow water depth and no conditions for using large floating cranes, the method of erecting the cast-in-place concrete main beam on the two supports Structurally cons...
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