A kind of pedestrian overcrossing assembled steel truss girder
The utility model belongs to municipal bridge design field, relates in particular to a kind of pedestrian overcrossing assembled steel truss girder.
At present, all material is transported to construction ground by design and the structural requirement of overline bridge, a large amount of work high above the ground, open work, and the cycle of carrying out is long, affect the walking of normal pedestrian and vehicle, especially the in the situation that of bad weather, affect the progress of engineering, in addition, the structure of existing overline bridge is in the time of crossbearer road, for wider span, unreasonable due to structure, cannot complete wider span.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of pedestrian overcrossing assembled steel truss girder, is intended to solve overline bridge long construction period outside in prior art, the problem poor compared with the load-carrying members of large span.
The utility model is to realize like this, a kind of pedestrian overcrossing assembled steel truss girder, comprise upper frame, bridge road underframe is as bridge road and be positioned at the truss of Qiao Dao both sides as guardrail, upper frame, bridge road underframe and truss composition are across the cuboid framework of road, main support column is set in the both sides of cuboid framework to be supported, wherein, truss comprises the truss framework of surrounding, truss framework is that multiple square steel pipes are formed by connecting by framework truss sleeve pipe, in truss framework, be provided with " ^ " ellbeam, described " ^ " ellbeam is formed by connecting by sleeve pipe between " ^ " ellbeam by multiple round steel pipe, all fix by the C type floor of putting more energy in the junction of " ^ " ellbeam and truss framework.
Further, described bridge road underframe comprises bridge road frame-saw frame, and the multiple tracks bridge road frame crossbeam evenly arranging in Qiao road frame-saw frame; Described upper frame comprises upper frame framework, and the multiple tracks upper frame crossbeam arranging in upper frame framework, between its jackshaft road frame crossbeam, is set to 1/2～1/3 of interval between upper frame crossbeam.
Further, bridge road frame-saw frame is socketed to form by multiple square steel pipes, and bridge road frame crossbeam adopts round steel pipe.
Further, upper frame framework is socketed to form by multiple square steel pipes, and upper frame crossbeam adopts round steel pipe.
Compared with prior art, beneficial effect is the utility model: fabricated construction is the building forming at assemble in site with prefabricated member.A large amount of work high above the ground, open work are completed as far as possible in ground, factory.Construction speed is fast, and climate conditionality is little, and when construction, traffic is disturbed littlely, saves labour can improve construction quality, guarantees safe construction.Greatly develop modern architecture industry to reducing energy consumption cost, improving building structure quality and construction efficiency.
Under load action, truss mainly bears axial tension or pressure, thereby can make full use of the intensity of material, is applicable to the load-carrying members compared with large span.
The advantage of trussed construction is easy to make, be convenient to hoisted in position, can do the freely-supported pedestrian overcrossing across footpath greatly, and because girder is lower support type structure, the length of bridge ladder is the impact of acceptor's girder span footpath and deck-molding not, no matter how to change across footpath and deck-molding, in the situation that under-clearance standard is unified, the length of bridge ladder is all identical.So, it is greatly convenient to have brought to the batch production of bridge ladder, and can realize veritably standardized designs.
Brief description of the drawings
Fig. 1 is the equipment side structural representation that the utility model embodiment provides;
Fig. 2 is the trussed construction schematic diagram that the utility model embodiment provides;
Fig. 3 is the upper frame structural representation that the utility model embodiment provides;
Fig. 4 is that the utility model embodiment provides Qiao road Undercarriage structure schematic diagram;
In figure, 1 upper frame, 2 truss, 3 bridge road underframe, 4 ladders, 5 main support columns, 6 side support columns, 7 built-in fittings, 11Qiao road frame crossbeam, 12Qiao road frame-saw frame, 13Qiao road underframe sleeve pipe, 21 truss frameworks, 22 truss sleeve pipes, 23 " ^ " ellbeam, sleeve pipe between 24 " ^ " ellbeam, the 25C type floor of putting more energy into, 31 upper frame crossbeams, 32 upper frame frameworks, 33 upper frame frame sleeve.
Detailed description of the invention
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.
As shown in Figure 1, a kind of pedestrian overcrossing assembled steel truss girder comprises that upper frame 1, bridge road underframe 3 form the cuboid framework across road as bridge road and as truss 2, upper frame 1, bridge road underframe 3 and truss 2 that guardrail is positioned at Qiao Dao both sides, the side support column 6 that main support column 5 and both sides is set in the both sides of cuboid framework supports, and side support column 6 lower ends of main support column 5 and both sides all have built-in fitting 7 to imbed in ground.As shown in Figure 2, truss 2 comprises the truss framework 21 of surrounding, truss framework 21 is formed by connecting by framework truss sleeve pipe 22 for multiple square steel pipes, after connecting, adopt and be welded and fixed, in truss framework 21, be provided with zigzag beam 23, " ^ " ellbeam 23 is formed by connecting by sleeve pipe 24 between " ^ " ellbeam by multiple round steel pipe, all fixing by the C type floor 25 of putting more energy in the junction of " ^ " ellbeam 23 and truss framework 21, between " ^ " ellbeam 23 and truss framework 21, adopts and is welded to connect.As shown in Figures 3 and 4, bridge road underframe 3 comprises bridge road frame-saw frame 11, and the multiple tracks bridge road frame crossbeam 12 of Qiao road frame-saw frame 11 interior even settings; Upper frame 1 comprises upper frame framework 32, and at the multiple tracks upper frame crossbeam 31 of upper frame framework 32 interior settings, between its jackshaft road frame crossbeam 31, is set to 1/2～1/3 of interval between upper frame crossbeam.Bridge road frame-saw frame 12 is socketed to form by multiple square steel pipes, and bridge road frame crossbeam 11 adopts round steel pipe.Upper frame framework 32 is socketed to form by upper frame frame sleeve 33 by multiple square steel pipes, and upper frame crossbeam 31 adopts round steel pipe.
The all members of the utility model are all after factory process moulding, transport to job site and assemble by sleeve pipe or welding.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all any amendments of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in protection domain of the present utility model.