A kind of steel trestle structure capable of rapid disassembly and assembly

Abstract

The utility model discloses a steel trestle structure for rapid assembly and disassembly, comprising two parallel bridge decks, the tops of the two bridge decks being connected along the length direction by a plurality of bridge deck connecting steel bars; the bridge deck comprises a plurality of parallel I-beams, the upper flange plates of the I-beams at the tops of the plurality of parallel I-beams are provided with bridge decks with sloped ends at both ends, the lower flange plates of the I-beams at the bottoms of the plurality of parallel I-beams are connected by a plurality of lower connecting steel bars, the tops of the I-beams at the upslope section of the bridge deck are provided with an upslope section adjustment plate adapted to the upslope section of the bridge deck, the tops of the I-beams at the downslope section of the bridge deck are provided with a downslope section adjustment plate adapted to the downslope section of the bridge deck, and the ends of the lower flange plates of the I-beams at the bottoms of the I-beams at the downslope section are provided with a lap steel plate. The utility model has strong adaptability, can be applied to the rapid formation of step climbing and groove crossing channels under various working conditions at construction sites, and has a high turnover utilization rate of the steel trestle.

Description

Technical Field

[0001] The utility model belongs to the technical field of building construction bridges, and in particular relates to a steel trestle structure that can be quickly disassembled and assembled. Background Art

[0002] In the construction of the roller-compacted concrete dam of a hydropower station, a pouring method is often used in which dump trucks transport concrete directly into the warehouse. Since there is generally a height difference of 2 to 3 meters between adjacent dam sections, construction machinery cannot directly enter the warehouse surface without a warehouse access. In addition, some trenches and small river crossings on site during construction also require mechanical passages. These construction passages will also need to be changed and adjusted at any time as the construction site progresses. Conventional methods generally use slag padding and road construction, and buried pipe culverts to form construction passages, which have the problems of high construction cost and slow speed. Therefore, a steel trestle structure suitable for different working conditions that can be quickly disassembled and assembled and used in a turnover manner is needed. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a steel trestle structure that can be quickly disassembled and assembled in view of the deficiencies in the above-mentioned prior art. The structure is novel and reasonable in design, simple in structure, and highly adaptable. The structure can be suitable for the rapid formation of step climbing and groove crossing channels in various working conditions at construction sites. The steel trestle has a high turnover rate, is convenient and fast, and is easy to promote and use.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a steel trestle structure that can be quickly disassembled and assembled, characterized in that it comprises two bridge plates that are arranged in parallel between two adjacent concrete dam sections or at both ends of a groove and are used for construction vehicles to pass through, and the tops of the two bridge plates are connected along the length direction by a plurality of bridge plate connecting steel bars;

[0005] The bridge deck comprises a plurality of I-beams arranged in parallel, and bridge decks with sloped ends are arranged on the upper flange plates of the I-beams at the top of the plurality of I-beams arranged in parallel, and the lower flange plates of the I-beams at the bottom of the plurality of I-beams arranged in parallel are connected by a plurality of lower connecting steel bars, an upslope section adjustment plate adapted to the upslope section of the bridge deck is arranged on the top of the I-beams at the upslope section of the bridge deck, a downslope section adjustment plate adapted to the downslope section of the bridge deck is arranged on the top of the I-beams at the downslope section of the bridge deck, and a platform opening overlapped with the edge of the concrete dam section step is arranged at the end of the lower flange plate of the I-beam at the bottom of the I-beam at the downslope section, and a lap steel plate is arranged at the platform opening position.

[0006] The above-mentioned quick-disassembly and assembly steel trestle structure is characterized in that: the multiple lower connecting steel bars are arranged at equal intervals along the length direction of the bridge deck.

[0007] The above-mentioned quick-disassembly and assembly steel trestle structure is characterized in that a plurality of lifting ears are arranged on the outer side of the I-beam web of the I-beam located on the outer side among the plurality of parallel I-beams.

[0008] The above-mentioned quick-disassembly and assembly steel trestle structure is characterized in that: the bridge deck is provided with a plurality of anti-skid steel bars at equal intervals along the length direction of the bridge deck, and the anti-skid steel bars include threaded steel bars.

[0009] The above-mentioned quick-disassembly and assembly steel trestle structure is characterized in that a front end steel plate is welded to the uphill end of the bridge deck and one end of the lower flange plate of the I-beam, and a rear end steel plate is welded to the downhill end of the bridge deck and the other end of the lower flange plate of the I-beam, and the height of the front end steel plate and the rear end steel plate is 3 to 5 cm.

[0010] Compared with the prior art, the utility model has the following advantages:

[0011] 1. The utility model steel trestle utilizes the characteristic that the wheels of construction machinery vehicles are arranged on both sides. According to the driving width position of the wheels, two independent bridge plates are combined to form a steel trestle. By leaving a gap between the two bridge plates, the hoisting weight of a single bridge plate is reduced to the maximum extent, which is convenient for overall hoisting and rapid installation.

[0012] 2. The longitudinal section of the bridge deck of the utility model steel trestle is a structure of thick in the middle and thin at both ends, so that the material strength of the I-beam can be fully exerted, the force is reasonable, and the weight of the bridge deck is reduced. The bridge deck with thin ends can facilitate the smooth connection between the elevation of the bridge deck and the abutments on both sides, without the need for smoothing treatment such as slag padding at the ends of the bridge deck.

[0013] 3. The structural design of the steel trestle of the utility model can be applied to various construction conditions such as step climbing erection and trench crossing erection at the construction site. It has strong adaptability, can meet the trestle erection conditions of different construction conditions and can be repeatedly used, with high utilization rate.

[0014] To sum up, the utility model has a novel and reasonable design, can realize the rapid erection and dismantling of the steel trestle, can be applied to various construction site conditions such as the erection of steel trestles for trench crossing and step climbing, and provides an effective solution for the rapid formation of storage channels for roller compacted concrete construction of hydropower station dams and the rapid bridge erection across small rivers and trenches, which is convenient for promotion and use.

[0015] The technical solution of the utility model is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a diagram showing the effect of the utility model on the construction vehicle climbing the slope.

[0017] Figure 2This is a diagram showing the effect of the utility model being used in a construction vehicle crossing a trench.

[0018] Figure 3 for Figure 2 Rear view of.

[0019] Figure 4 It is a structural schematic diagram of the utility model.

[0020] Figure 5 for Figure 4 AA section view.

[0021] Description of reference numerals:

[0022] 1—concrete dam section; 2—trench; 3—construction vehicle;

[0023] 4—bridge deck; 5—bridge deck connecting steel bars; 6—I-beam lower flange plate;

[0024] 7—I-beam upper flange plate; 8—I-beam web plate; 9—bridge deck;

[0025] 10—anti-slip steel bars; 11—lower connecting steel bars; 12—uphill adjustment plate;

[0026] 13—front end steel plate; 14—downhill adjustment plate; 15—rear end steel plate;

[0027] 16—lap steel plate; 17—lifting eye. DETAILED DESCRIPTION

[0028] like Figures 1 to 5 As shown, the utility model comprises two bridge decks 4 arranged in parallel between two adjacent concrete dam sections 1 or at both ends of a trench 2 and for construction vehicles 3 to pass through, and the tops of the two bridge decks 4 are connected along the length direction by a plurality of bridge deck connecting steel bars 5;

[0029] The bridge deck 4 includes a plurality of I-beams arranged in parallel, and a bridge deck 9 with sloped ends is arranged on the upper flange plates 7 of the I-beams at the top of the plurality of I-beams arranged in parallel, and the lower flange plates 6 of the I-beams at the bottom of the plurality of I-beams arranged in parallel are connected by a plurality of lower connecting steel bars 11, an uphill section adjustment plate 12 adapted to the uphill section of the bridge deck 9 is arranged on the top of the I-beams at the uphill section of the bridge deck 4, and a downhill section adjustment plate 14 adapted to the downhill section of the bridge deck 9 is arranged on the top of the I-beams at the downhill section of the bridge deck 4, and a platform opening overlapped with the step edge of the concrete dam section 1 is arranged at the end of the lower flange plate 6 of the I-beams at the bottom of the I-beams at the downhill section, and a lap steel plate 16 is arranged at the platform opening position.

[0030] It should be noted that a slope structure is formed by cutting the I-beam upper flange plate 7 and the I-beam web 8 at the original position of the uphill section adjustment plate 12, and the uphill section adjustment plate 12 is welded on the top of the I-beam web 8; similarly, the I-beam upper flange plate 7 and the I-beam web 8 at the original position of the downhill section adjustment plate 14 are cut to form a slope structure, and the downhill section adjustment plate 14 is welded on the top of the I-beam web 8. The lower part of the end of the downhill end of the bridge deck along the longitudinal section adopts a platform hook shape design. The platform structure can facilitate the placement of the steel trestle on the edge of the concrete step during climbing installation, and a lap steel plate is provided at the platform position.

[0031] In this embodiment, the plurality of lower connecting steel bars 11 are arranged at equal intervals along the length direction of the bridge deck 4 .

[0032] In this embodiment, a plurality of lifting ears 17 are provided on the outer side of the I-beam web 8 of the I-beam located on the outer side among the plurality of I-beams arranged in parallel.

[0033] In this embodiment, the bridge deck 9 is provided with a plurality of anti-skid steel bars 10 at equal intervals along the length direction of the bridge deck 4 , and the anti-skid steel bars 10 include threaded steel bars.

[0034] In this embodiment, a front end head steel plate 13 is welded to the upslope end of the bridge deck 9 and one end of the I-beam lower flange plate 6, and a rear end head steel plate 15 is welded to the downslope end of the bridge deck 9 and the other end of the I-beam lower flange plate 6. The height of the front end head steel plate 13 and the rear end head steel plate 15 is 3 to 5 cm. The front end head steel plate 13 and the rear end head steel plate 15 arranged on the end facade of the bridge deck increase the local strength of the bridge deck end.

[0035] In actual installation, after the erection of the bridge deck is completed, dowel bars need to be set on both sides of the abutment to perform necessary temporary welding and fixation on the bridge deck, and each component structure is directly connected by electric welding.

[0036] When the utility model is used, firstly, the abutments on both sides of the bridge erection position are cleaned and necessary leveling is performed, the width and position of the abutments on both sides need to match the size of the bridge deck, a car crane is used to hoist the two bridge decks into place respectively, the gap between the two bridge decks is adjusted to the designed size, and then the two bridge decks are welded and connected by steel bars, and appropriate dowel bars are set at the abutments on both sides according to actual conditions to perform necessary reinforcement on the steel trestle to prevent the steel trestle from shifting. Before the steel trestle is officially opened to traffic, a traffic load test is required for the steel trestle, and it can only be officially opened to traffic after safety verification.

[0037] The above description is only a preferred embodiment of the present invention and does not constitute any limitation to the present invention. Any simple modification, change and equivalent structural change made to the above embodiment according to the technical essence of the present invention shall still fall within the protection scope of the technical solution of the present invention.

Claims

1. A steel trestle structure that can be quickly disassembled and assembled, characterized in that: It comprises two bridge plates (4) arranged in parallel between two adjacent concrete dam sections (1) or at both ends of a trench (2) and for construction vehicles (3) to pass through, and the tops of the two bridge plates (4) are connected along the length direction by a plurality of bridge plate connecting steel bars (5); The bridge deck (4) comprises a plurality of parallel-arranged I-beams, the upper flange plates (7) of the I-beams at the top of the plurality of parallel-arranged I-beams are provided with bridge decks (9) with sloped ends at both ends, the lower flange plates (6) of the I-beams at the bottom of the plurality of parallel-arranged I-beams are connected via a plurality of lower connecting steel bars (11), the top of the I-beams at the upslope section of the bridge deck (4) are provided with an upslope section adjustment plate (12) adapted to the upslope section of the bridge deck (9), the top of the I-beams at the downslope section of the bridge deck (4) are provided with a downslope section adjustment plate (14) adapted to the downslope section of the bridge deck (9), and the end of the lower flange plate (6) of the I-beams at the bottom of the I-beams at the downslope section is provided with a platform opening overlapped with the step edge of the concrete dam section (1), and a lap steel plate (16) is provided at the platform opening position.

2. A quick-disassembly steel trestle structure according to claim 1, characterized in that: The plurality of lower connecting steel bars (11) are arranged at equal intervals along the length direction of the bridge deck (4).

3. A quick-disassembly steel trestle structure according to claim 1, characterized in that: A plurality of lifting ears (17) are arranged on the outer side of the I-beam web (8) of the I-beam located on the outer side among the plurality of I-beams arranged in parallel.

4. A quick disassembly and assembly steel trestle structure according to claim 1, characterized in that: The bridge deck (9) is provided with a plurality of anti-skid steel bars (10) at equal intervals along the length direction of the bridge deck (4), and the anti-skid steel bars (10) include threaded steel bars.

5. A quick-disassembly steel trestle structure according to claim 1, characterized in that: A front end steel plate (13) is welded between the upslope end of the bridge deck (9) and one end of the I-beam lower flange plate (6), and a rear end steel plate (15) is welded between the downslope end of the bridge deck (9) and the other end of the I-beam lower flange plate (6), and the height of the front end steel plate (13) and the rear end steel plate (15) is 3 to 5 cm.

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