CN206538672U - Novel fabricated truss steel trestle - Google Patents

Abstract

The utility model relates to the technical field of steel bridges, in particular to a novel assembled truss trestle bridge used in expressway protection and emergency rescue. A new type of prefabricated truss steel trestle bridge, including a trestle bridge and bridge piers, the two ends of the trestle bridge are abutments made of reinforced concrete, the bridge piers are steel pipe piles, and the two steel pipe piles are connected by scissors. A horizontal load-bearing beam is fixed on the top of the pile, and longitudinal load-bearing beams are symmetrically fixed at both ends of the horizontal load-bearing beam. A longitudinal distribution beam is arranged on the distribution beam, and a bridge deck layer is laid on the longitudinal distribution beam. The utility model is easy to assemble, has the characteristics of simple structure, reasonable economy, easy implementation, overall stability and strong bearing capacity, high strength and large span, and is suitable for expressway traffic protection and emergency rescue.

Description

New fabricated truss steel trestle bridge

technical field

The utility model relates to the technical field of steel bridges, in particular to a novel assembled truss trestle bridge used in highway traffic protection and emergency rescue.

Background technique

For inland rivers, highways and railways with large spans that need to be navigated or driven, such as: to build a temporary construction bridge on the expressway for expressway maintenance and emergency rescue, steel bridges are the most common The construction of steel bridges is conducive to the smooth progress of the project. At present, most of the steel temporary bridges use Bailey frame, because of the high strength of Bailey frame, it is more economical and reasonable to erect a large-span temporary bridge, but the assembly is more troublesome.

Utility model content

The technical problem to be solved by the utility model is: to overcome the deficiencies in the prior art and provide a new type of assembled truss trestle bridge with high strength and large span.

The technical solution adopted by the utility model to solve the technical problems is: a new type of assembled truss steel trestle bridge, including a trestle bridge and a bridge pier. The steel pipe piles are connected by scissor braces, the top of the steel pipe piles is fixed with a horizontal load-bearing beam, and the two ends of the horizontal load-bearing beam are symmetrically fixed with longitudinal load-bearing beams, and the longitudinal load-bearing beam is an assembled truss. A transverse distribution beam is fixed on the longitudinal load-bearing beam, and a longitudinal distribution beam is arranged on the transverse distribution beam, and a bridge deck layer is laid on the longitudinal distribution beam.

Specifically, the prefabricated truss has two layers of triangular trusses arranged symmetrically up and down. The triangular truss is formed by connecting multiple triangular frames side by side. A single triangular frame includes end compression bars, end chords, oblique Rods and struts, one end of the end chord, the oblique chord and the strut are all connected to the end compression rod, the other ends of the three are fixedly connected, and the end chord and the oblique chord are symmetrical about the strut.

More specifically, middle vertical rods and diagonal web rods with the same structure are respectively fixed at the midpoints of the end chords and oblique chords, the middle vertical rods are perpendicular to the end compression rods, and the oblique webs on the end chords The web is perpendicular to the end chord.

Specifically, the steel pipe pile is a concrete steel pipe pile, and the steel pipe pile adopts a spiral steel pipe.

Specifically, the horizontal load-bearing beam is I-shaped steel, and vertical stiffeners are welded on both sides.

Specifically, both the horizontal distribution beam and the longitudinal distribution beam are I-beams, and the bridge deck layer is patterned steel plate.

Specifically, shaped steel guardrails are arranged on both sides of the bridge deck, and the lower ends of the shaped steel guardrails are fixed on the transverse distribution beams.

The beneficial effects of the utility model are: the utility model is easy to assemble, has the characteristics of simple structure, reasonable economy, easy implementation, overall stability and strong bearing capacity, high strength and large span, and is suitable for highway traffic protection and emergency rescue.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

Fig. 1 is the structural representation of the utility model.

FIG. 2 is a sectional view of FIG. 1 .

Fig. 3 is a schematic diagram of the structure of Fig. 2 along the direction A-A.

Fig. 4 is a structural schematic diagram of the assembled truss in the present invention.

In the figure: 1. abutment, 2. steel pipe pile, 3. scissor brace, 4. horizontal load-bearing beam, 5. longitudinal load-bearing beam, 6. horizontal distribution beam, 7. longitudinal distribution beam, 8. deck pavement, 9. End pressure bar, 10. End chord, 11. Inclined chord, 12. Strut, 13. Middle vertical bar, 14. Diagonal web bar, 15. Sectional steel guardrail.

detailed description

The utility model is described further in conjunction with accompanying drawing now. These drawings are simplified schematic diagrams only to illustrate the basic structure of the utility model in a schematic way, so they only show the configurations related to the utility model.

A new type of prefabricated truss steel trestle as shown in Figures 1-2, including trestle and bridge piers, the two ends of the trestle are reinforced concrete abutments 1, the bridge piers are steel pipe piles 2, and the two steel pipe piles 2 are separated by scissors. The support 3 is connected, the top of the steel pipe pile 2 is fixed with a horizontal load-bearing beam 4, and the two ends of the horizontal load-bearing beam 4 are symmetrically fixed with a longitudinal load-bearing beam 5, the longitudinal load-bearing beam 5 is an assembled truss, and a horizontal distribution The beam 6 is provided with a longitudinal distribution beam 7 on the transverse distribution beam 6 , and a bridge deck layer 8 is laid on the longitudinal distribution beam 7 .

As shown in Figure 4, the prefabricated truss has two layers of triangular trusses arranged symmetrically up and down. The triangular truss is formed by connecting multiple triangular structures side by side. The chord 11 and the strut 12, one end of the end chord 10, the oblique chord 11 and the strut 12 are all connected to the end compression rod 9, and the other ends of the three are fixedly connected, and the end chord 10 and the oblique chord 11 Symmetrical about the strut 12 . The midpoints of the end chord 10 and the oblique chord 11 are respectively fixed with the middle vertical rod 13 and the oblique web rod 14 with the same structure, the middle vertical rod 13 is perpendicular to the end pressure rod 9, and the oblique web rod 14 Perpendicular to the end chord 10.

In this embodiment, the steel pipe pile 2 is a concrete steel pipe pile, and the steel pipe pile 2 adopts a spiral steel pipe. The horizontal load-bearing beam 4 is an I-shaped steel, and vertical stiffeners are welded on both sides. Both the horizontal distribution beam 6 and the longitudinal distribution beam 7 are I-beams, and the deck layer 8 is patterned steel plate. Both sides of the deck layer 8 are provided with shaped steel guardrails 15 , and the lower ends of the shaped steel guardrails 15 are fixed on the transverse distribution beam 6 .

The section steel guardrail 15 is welded on the transverse distribution beam 6 on the assembled truss, and the height of the welding foot is not less than 8mm. The vertical bars and handrails of the railings are continuously painted with red and white warning reflective paint. The steel pipe pile 2 of the trestle bridge is painted with eye-catching orange-red topcoat on the part above the low tide level, safety warning lights are installed every 15m, and a high-power loudspeaker is set in the center of the trestle bridge. Evacuate inside.

The feature of the prefabricated truss is that it is fully assembled, the heaviest member is 1.8t/piece, it is easy to install, and has good construction versatility; it can be completely disassembled and recycled, and it is economical, overcoming the weight of the main girder of the steel box of the current "moving formwork" in China Large size, difficult installation and transportation, and poor turnover.

The installation position of the transverse distribution beam 6 must correspond to the node of the fabricated truss; the longitudinal distribution beam 7 must be evenly arranged in the horizontal direction, and the checkered steel plate of the deck layer 8 is intermittently welded with the longitudinal distribution beam 7 to ensure its flatness. The components of each layer must be closely bonded to ensure effective load transfer.

The above-mentioned embodiments are only to illustrate the technical conception and characteristics of the present utility model. Equivalent changes or modifications made by the spirit of the present utility model shall be covered within the protection scope of the present utility model.

Claims (7)

1. a kind of novel fabricated truss steel trestle, including trestle and bridge pier, the trestle two ends are what armored concrete was poured Abutment (1), the bridge pier is by bridging (3) connection, steel-pipe pile (2) top between steel-pipe pile (2), two steel-pipe piles (2) Horizontal spandrel girder (4) is fixed with, two ends are symmetrically fixed with longitudinal spandrel girder (5) on the horizontal spandrel girder (4), and its feature exists In：Longitudinal spandrel girder (5) is to be fixed with transverse distribution beam (6) on assembling truss, longitudinal spandrel girder (5), in institute State and longitudinal distribution beam (7) is provided with transverse distribution beam (6), bridge floor laying (8) is equipped with longitudinal distribution beam (7).

2. novel fabricated truss steel trestle according to claim 1, it is characterised in that：The assembling truss has Upper and lower symmetrically arranged two layers of English truss, the English truss is formed by connecting side by side by multiple triangular structural frames, single triangle Structure-steel framing includes end-post (9), end chord member (10), inclined chord (11) and strut (12), the end chord member (10), inclined chord (11) It is both connected to one end of strut (12) on end-post (9), the other end of three is fixedly connected, and end chord member (10) and inclined chord (11) it is symmetrical on strut (12).

3. novel fabricated truss steel trestle according to claim 2, it is characterised in that：The end chord member (10) and oblique string The midpoint of bar (11) is respectively fixed with montant (13) and diagonal web member (14) in structure identical, the middle montant (13) and side pressure Vertically, the diagonal web member (14) on the end chord member (10) is vertical with end chord member (10) for bar (9).

4. novel fabricated truss steel trestle according to claim 1, it is characterised in that：The steel-pipe pile (2) is coagulation Native steel-pipe pile, steel-pipe pile (2) uses spiral steel pipe.

5. novel fabricated truss steel trestle according to claim 1, it is characterised in that：The horizontal spandrel girder (4) is I-steel, both sides are welded with perpendicular strength plate.

6. novel fabricated truss steel trestle according to claim 1, it is characterised in that：The transverse distribution beam (6) and Longitudinal distribution beam (7) is I-steel, and the bridge floor laying (8) is checkered steel plate.

7. novel fabricated truss steel trestle according to claim 1, it is characterised in that：The two of the bridge floor laying (8) Side is provided with shaped steel guardrail (15), and the lower end of the shaped steel guardrail (15) is fixed on transverse distribution beam (6).