CN218880562U

CN218880562U - Fast-assembling combined steel temporary bridge structure

Info

Publication number: CN218880562U
Application number: CN202320092843.3U
Authority: CN
Inventors: 杨光旭; 张海波; 周先; 刘培江; 夏勇
Original assignee: Third Construction Co Ltd of China Construction Eighth Engineering Divison Co Ltd
Current assignee: Third Construction Co Ltd of China Construction Eighth Engineering Divison Co Ltd
Priority date: 2023-01-31
Filing date: 2023-01-31
Publication date: 2023-04-18
Anticipated expiration: 2033-01-31

Abstract

The utility model provides a fast-assembling combined type steel temporary bridge structure, which comprises a supporting beam, wherein two ends of the supporting beam are arranged on a crown beam, the upper end of the crown beam is positioned at the outer end of the supporting beam and is provided with a cantilever beam, the lower end of the crown beam is provided with a fender post, the upper end of the supporting beam is provided with a bridge deck steel plate, and the upper end of the bridge deck steel plate is provided with a sidewalk guardrail and a roadway guardrail; the supporting beam comprises a plurality of I-shaped steels distributed along the width direction of the supporting beam, the lower flanges of the adjacent I-shaped steels are connected through a plurality of horizontal steel plates, box girders are arranged between webs of the adjacent I-shaped steels or connected through a plurality of vertical steel plates, and the box girders and the vertical steel plates are alternately arranged. The utility model discloses the structure is light, save material, and on-the-spot strong adaptability.

Description

Quickly-assembled combined steel temporary bridge structure

Technical Field

The utility model relates to a steel suspension bridge technical field specifically is a piece together modular steel suspension bridge structure soon.

Background

With the progress of urban renewal engineering in a fierce manner, the situation of road digging and traffic blocking is very common, and the way of changing roads and bypassing or building temporary approaches is usually adopted to ensure that the traffic is not interrupted, and meanwhile, the smooth progress of the construction can be ensured. The way of diversion and detour is low in cost, but needs to occupy a large field, and is difficult to be generally applicable to cities with narrow places. In practical application, it is common to construct temporary steel temporary bridges to ensure smooth traffic and pedestrian traffic. The steel temporary bridge has the main advantages of simple structure, low manufacturing cost (relative to a reinforced concrete structure), small influence on construction period and high residual value recovery rate. At present, a common steel temporary bridge adopts a structural form that a finished Bailey beam is used as a main beam, I-shaped steel is used as a distribution beam, and a steel plate is laid on the top of the distribution beam.

However, the height of the industrial finished Bailey beam is 1.5m, and the height of the I-shaped steel beam and the steel plate is added, so that the height of the bridge deck structure is about 1.8m generally, and some sections are limited by fields and cannot meet the installation height requirement of the Bailey beam steel temporary bridge. A reinforced concrete rectangular section 7800 x 8800mm is adopted in an open-cut ramp of a certain engineering, the thickness of a top plate is 800mm, and because the reinforced concrete rectangular section is located below a current urban main road, in order to ensure that traffic is not blocked, a steel temporary bridge needs to be erected to span an open-cut deep foundation pit in the ramp construction process, and the deep foundation pit adopts a supporting mode of a fender post and a crown beam. The thickness of the top covering soil of the ramp structure is only 0.88 to 1.2m due to the limitation of the height of the urban main road and no slope releasing condition on two sides, and the structural form of the Bailey beam cannot meet the construction requirement. Therefore, a structural form with a small height of the upper structure of the bridge is needed, and the structure not only needs to ensure the safety of the structural design, but also needs to ensure the simplicity, the rapidness and the easy operation.

Disclosure of Invention

To the above-mentioned prior art, the utility model provides a fast modular steel temporary bridge structure of piecing together.

The utility model provides a fast-assembling combined type steel temporary bridge structure, which comprises a supporting beam, wherein two ends of the supporting beam are arranged on a crown beam, the upper end of the crown beam is positioned at the outer end of the supporting beam and is provided with a cantilever beam, the lower end of the crown beam is provided with a fender post, the upper end of the supporting beam is provided with a bridge deck steel plate, and the upper end of the bridge deck steel plate is provided with a sidewalk guardrail and a roadway guardrail; the supporting beam comprises a plurality of I-shaped steels distributed along the width direction of the supporting beam, the lower flanges of the adjacent I-shaped steels are connected through a plurality of horizontal steel plates, box girders are arranged between webs of the adjacent I-shaped steels or connected through a plurality of vertical steel plates, and the box girders and the vertical steel plates are alternately arranged.

Preferably, a supporting steel plate is arranged between the supporting beam and the crown beam.

Preferably, a plurality of caulking reinforcing steel bars are arranged on the bridge deck steel plate along the width direction of the bridge deck steel plate, and the length of the caulking reinforcing steel bars is consistent with that of the bridge deck steel plate.

Preferably, a plurality of anti-skidding reinforcing steel bars are distributed at the upper end of the bridge deck steel plate along the length direction of the bridge deck steel plate.

Preferably, the lower end of the sidewalk guardrail is provided with a ground beam steel plate.

Preferably, the vertical steel plates are welded to the upper ends of the horizontal steel plates, between the adjacent horizontal steel plates, and at both ends of the i-beam.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model provides a fast-assembling combined type steel temporary bridge structure, adopt I-steel and box girder concatenation to constitute a supporting beam, the clear height of bridge superstructure reduces 60%, saves space, optimizes the road vertical curve linearity, improves the driving comfort level, avoids landing stage both ends to look for the slope, has reduced engineering cost; the box girder structure adopts national standard component assembly, and preparation and processing are convenient, can on-the-spot processing also can the producer customize on-the-spot assembly, and the efficiency of construction is high, and the quality is secure.

2. The utility model discloses a case roof beam is preferably the opening little case roof beam, passes power succinctly and clearly, considers the circumstances such as 80T dregs car and traffic congestion according to city A level load, calculates opening little case roof beam tensile stress and is 64.5MPa (< f =215 MPa), and shear stress is 9.1MPa (< tau =125 MPa), and the biggest deformation is 7.1mm, is less than steel construction L/400= 25mm's allowable deformation requirement; the structure is light, saves materials, has strong field adaptability, can utilize the existing maintenance structure, and can also be arranged into a strip foundation.

Drawings

Fig. 1 is a schematic side view of an embodiment of the present invention.

Fig. 2 is a partial schematic view of fig. 1.

Fig. 3 is a schematic front view of an embodiment of the present invention.

Fig. 4 is a partial schematic view of fig. 3.

Fig. 5 is a partial structural view of an embodiment of the present invention.

Fig. 6 is a partial structural view of a support beam according to an embodiment of the present invention.

In the figure: 1. a support beam; 2. a crown beam; 3. a support steel plate; 4. a cantilever beam; 5. enclosing piles; 6. a bridge deck steel plate; 7. filling the joints with reinforcing steel bars; 8. anti-skid steel bars; 9. a sidewalk guardrail; 10. a roadway barrier; 11. i-shaped steel; 12. a horizontal steel plate; 13. a box girder; 14. a vertical steel plate; 15. a floor beam steel plate.

Detailed Description

In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand and understand, the present invention is further explained by combining with the specific drawings.

Examples

A quick-splicing combined type steel temporary bridge structure is shown in figures 1-5 and comprises a supporting beam 1, two ends of the supporting beam 1 are arranged at the upper end of a crown beam 2, a supporting steel plate 3 which is 20mm thick and 30cm wide is arranged between the supporting beam 1 and the crown beam 2, the length of the supporting steel plate 3 is consistent with the width of the supporting beam 1, the distance between the center of the crown beam 2 and a foundation edge is not less than 500mm, the crown beam 2 is leveled by M15 mortar with the thickness of 2cm, the bottom of the supporting steel plate 3 is embedded into a leveling mortar layer of the crown beam 2, cantilever beams 4 are arranged at two outer ends of the supporting beam 1 at the upper end of the crown beam 2, a fender pile 5 is arranged at the lower end of the crown beam 2, a bridge deck steel plate 6 is welded at the upper end of the supporting beam 1, a plurality of reinforcing steel bars 7 are arranged on the bridge deck steel plate 6 along the width direction of the bridge deck, a plurality of reinforcing steel bars 8 are arranged at the upper end of the bridge deck steel plate 6 along the length direction of the bridge deck, a plurality of reinforcing steel bars 8 are arranged on the bridge deck steel plate 6, a sidewalk is provided with a guardrail 899 and a guardrail 8910, the guardrail of a guardrail on a sidewalk, and a guardrail, the guardrail of a guardrail on a guardrail, the guardrail on a sidewalk, and a guardrail, the guardrail, and a guardrail is convenient for mounting way 899, and a guardrail mounting area of a guardrail mounting area 899.

Further, as shown in fig. 3, 4, and 6, the supporting beam 1 includes a plurality of i-beams 11 arranged along the width direction thereof, the length of the i-beams 11 is the same as that of the supporting beam 1, the lower flanges of adjacent i-beams 11 are connected by a plurality of horizontal steel plates 12, the webs of adjacent i-beams 11 are connected by box girders 13 or by a plurality of vertical steel plates 14, the box girders 13 and the vertical steel plates 14 are alternately arranged, the height of the vertical steel plates 14 is the same as that of the webs of the i-beams 11, and the vertical steel plates 14 are welded to the upper ends of the horizontal steel plates 12, the middle of the adjacent horizontal steel plates 12, and both ends of the i-beams 11.

Wherein, the box girder 13 is an open small box girder, 10mm plywood or foam board is inserted between the two ends of the box girder 13 and the cantilever beam 4, and then C30 Dan Tong is used for filling, so as to meet the requirements of box girder displacement and deformation. The I-steel 11 is international HN700 x 300 x 13 x 24, the center distance is 450mm, the middle of the flange plate is separated by 150mm, an included angle of 1-3 degrees can be arranged around one end or the centroid of the box girder so as to meet the installation requirement of a curve section, and the box girder also has a light structure. The vertical steel plate 14 is 16mm thick and is as high as the web plate of the I-steel 11, so that the I-steel can be connected into a whole, and the width of the box girder 13 can be controlled. The horizontal steel plates 12 are 3m apart, 20mm thick and 300mm wide, and form an inverted T-shaped structure with the vertical steel plates 14. The bridge deck steel plate 6 is formed by splicing a plurality of steel plates, gaps with the width of 20mm are reserved among the steel plates, reinforcing steel bars with the diameter of 20mm are used as filling reinforcing steel bars 7 to penetrate through the gaps, and the filling reinforcing steel bars 7 are fully welded with the bridge deck steel plate 6 and the upper flanges of the I-shaped steel 11, so that the upper flanges of the I-shaped steel 11 are connected into a whole. The anti-skid steel bars 8 are made of round steel anti-skid strips with the diameter of phi 12mm, the intervals are 15cm, the anti-skid steel bars and the bridge deck steel plate 6 are welded in a discontinuous welding mode, and the anti-skid steel bars 8 are perpendicular to the direction of a roadway. And (3) symmetrically and discontinuously welding the joints of the vertical steel plates 14 between the I-shaped steels 11 by double-sided fillet welding, adopting skip welding with the length of 30mm, and performing repair welding after shaping. The welding position of the upper flange of the bridge deck steel plate 6 and the I-shaped steel 11 and the connecting position of the ground beam steel plate 15 and the bridge deck steel plate 6 are fully welded by single-sided fillet welding. All the weld heights are not less than 6mm. And after the steel temporary bridge main body is finished, coating anticorrosive paint in layers, wherein the color is selected according to the requirement.

The above is only the embodiment of the present invention, not the limitation of the patent scope of the present invention, all the equivalent structures made by the contents of the specification and the drawings are directly or indirectly applied to other related technical fields, all the same principle is within the patent protection scope of the present invention.

Claims

1. A quick-assembly combined type steel temporary bridge structure is characterized by comprising a supporting beam, wherein two ends of the supporting beam are arranged on a crown beam, the upper end of the crown beam is positioned at the outer end of the supporting beam and is provided with a cantilever beam, the lower end of the crown beam is provided with a fender post, the upper end of the supporting beam is provided with a bridge deck steel plate, and the upper end of the bridge deck steel plate is provided with a sidewalk guardrail and a roadway guardrail; the supporting beam comprises a plurality of I-shaped steels distributed along the width direction of the supporting beam, the lower flanges of the adjacent I-shaped steels are connected through a plurality of horizontal steel plates, box girders are arranged between webs of the adjacent I-shaped steels or connected through a plurality of vertical steel plates, and the box girders and the vertical steel plates are alternately arranged.

2. The quick-splicing composite steel temporary bridge structure according to claim 1, wherein a supporting steel plate is arranged between the supporting beam and the crown beam.

3. The quick-splicing combined steel temporary bridge structure according to claim 1 or 2, wherein a plurality of caulking reinforcing bars are arranged on the bridge deck steel plate along the width direction thereof, and the length of the caulking reinforcing bars is consistent with that of the bridge deck steel plate.

4. The quick-splicing combined steel temporary bridge structure according to claim 1 or 2, wherein a plurality of anti-skidding reinforcing steel bars are arranged at the upper end of the bridge deck steel plate along the length direction of the bridge deck steel plate.

5. The quick-splicing combined type steel temporary bridge structure according to claim 1 or 2, wherein the lower end of the sidewalk guardrail is provided with a ground beam steel plate.

6. The quick-splicing type steel access bridge structure according to claim 1 or 2, wherein the vertical steel plates are welded to upper ends of the horizontal steel plates, between adjacent horizontal steel plates, and at both ends of the i-shaped steel.