An arch cable temporary steel trestle structure and construction method

Abstract

The application relates to the technical field of steel structure manufacturing, in particular to an arch-shaped cable temporary steel trestle structure capable of walking with an automobile crane, safe and convenient, and capable of increasing material turnover rate, in which the standard sections between the trestle standard sections and the arch-shaped cross beams and the steel trestle body are all connected through bolts, the steel trestle body is connected through connecting lug plates and high-strength bolts, the length of the steel trestle body can be increased according to actual conditions, the construction period of the temporary steel trestle structure is shortened, the recycling times of the temporary steel trestle structure are increased, the material turnover rate is increased, and the engineering cost is reduced; the middle part of the arch-shaped beam structure is connected with the steel trestle body through a steel wire rope, so that the load bearing capacity of the temporary steel trestle structure is greatly increased; and the materials used in the temporary steel trestle structure are common and can be recycled, so that the construction efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of steel structure fabrication technology, and in particular to an arched cable-stayed temporary steel trestle bridge structure and its construction method. Background Technology

[0002] In modern building structural engineering construction, steel trestle bridges are usually set up as material transportation channels or vehicle passageways. During the construction of these channels, all the crossbeams of the steel trestle bridge need to be welded and fixed together, and the specifications and dimensions must be selected according to the site conditions. They cannot be reused. Moreover, due to the excessive weight of the vehicles passing through, measures such as increasing the strength of the materials and increasing the size of the materials are usually taken, resulting in a large amount of material waste. Summary of the Invention

[0003] To address the aforementioned problems, this invention discloses an arched cable-stayed temporary steel trestle bridge structure and construction method, thereby solving the problems of non-reusability and significant material waste in existing technologies.

[0004] On one hand, the present invention discloses an arched cable-stayed temporary steel trestle structure, including a steel trestle body, an arched crossbeam, and steel wire ropes;

[0005] The steel trestle bridge body includes at least two standard trestle sections. At least two first connecting lugs are fixed at both ends of each standard trestle section. Adjacent standard trestle sections are detachably connected together through the first connecting lugs. Lifting lugs are fixed on both upper surfaces of each standard trestle section.

[0006] Both ends of the arched crossbeam are fixed with second connecting lugs. The two ends of the arched crossbeam are detachably connected to the first connecting lugs on both sides of the steel trestle body through the second connecting lugs. Adjacent arched crossbeams are connected together by connecting rods. The lower surface of each arched crossbeam is fixed with wire rope perforated plates at intervals. The wire rope passes through the wire rope perforated plates and the lifting lugs of the standard section of the trestle to connect the middle part of the arched crossbeam to the steel trestle body.

[0007] In some embodiments, the temporary steel trestle structure further includes an outer connecting plate, wherein the first connecting lugs of adjacent standard sections of the trestle abut against each other, and the outer connecting plate covers the outside of the two abutting first connecting lugs and is fixedly connected to the two first connecting lugs by bolts.

[0008] In some embodiments, the second connecting lug is detachably connected to the first connecting lug by bolts.

[0009] In some embodiments, the arched crossbeam is made of round steel, and the standard sections of the trestle are composed of shaped steel sections.

[0010] In some embodiments, the upper surface of the arched beam is provided with lugs.

[0011] On the other hand, this invention discloses a construction method for an arched cable-stayed temporary steel trestle bridge structure, comprising the following steps:

[0012] At least two standard trestle sections are provided, each of which has at least two first connecting lugs fixed at both ends, and each of which has lifting lugs fixed on both upper surfaces.

[0013] At least two standard trestle sections are sequentially and detachably connected together via the first connecting lug to form the steel trestle body;

[0014] At least two arched beams are provided, and adjacent arched beams are connected side by side by connecting rods to form an arched beam structure. Both ends of the arched beams are fixed with second connecting lugs, and the lower surface of each arched beam is fixed with wire rope perforated plates at intervals.

[0015] The arched beam structure is detachably connected to the first connecting ear plates on both sides of the steel trestle body via the second connecting ear plate;

[0016] The middle part of the arched crossbeam and the steel trestle body are connected together by using steel wire ropes that pass through the steel wire rope perforated plate and the lifting lugs of the standard section of the trestle.

[0017] In some embodiments, the step of sequentially and detachably connecting at least two standard trestle sections together via the first connecting lug to form the steel trestle body includes:

[0018] The two first connecting lugs of adjacent standard sections of the trestle abut against each other;

[0019] An outer connecting plate is used to cover the outside of the two first connecting lugs, and the outer connecting plate is fixedly connected to the two first connecting lugs together with bolts.

[0020] In some embodiments, the second connecting lug is detachably connected to the first connecting lug by bolts.

[0021] In some embodiments, the arched crossbeam is made of round steel, and the standard sections of the trestle are composed of shaped steel sections.

[0022] In some embodiments, the upper surface of the arched beam is provided with lugs.

[0023] Compared with the prior art, the above invention has at least one of the following advantages or beneficial effects:

[0024] This invention provides an arched cable-stayed temporary steel trestle structure that allows for safe and convenient movement of truck cranes and increases material turnover. In this temporary steel trestle structure, the standard sections of the trestle and the arched beams and the main body of the steel trestle are all bolted together. Since the main body of the steel trestle uses standard-length sections connected by connecting lugs and high-strength bolts, the length of the main body can be increased based on actual site conditions, thereby shortening the construction period, increasing the number of times the temporary steel trestle structure can be reused, increasing material turnover, and thus reducing project costs. Furthermore, the middle part of the arched beam structure is connected to the main body of the steel trestle by steel wire ropes, greatly enhancing the load-bearing capacity of the temporary steel trestle structure. Moreover, since the materials used in the temporary steel trestle structure are relatively common and recyclable, construction efficiency is enhanced. Attached Figure Description

[0025] The invention, its features, shape, and advantages will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings. Like reference numerals denote like parts throughout the drawings. The drawings are not drawn to scale; their focus is on illustrating the gist of the invention.

[0026] Figure 1 This is a schematic diagram of the arched cable-stayed temporary steel trestle bridge structure in an embodiment of the present invention;

[0027] Figure 2 This is a schematic elevation view of the connection node between the arched crossbeam and the steel trestle bridge body in an embodiment of the present invention.

[0028] Figure 3 This is a front view of the connection node between the arched crossbeam and the steel trestle bridge body in an embodiment of the present invention;

[0029] Figure 4 This is a schematic elevation view of the connection nodes between standard sections of the trestle in an embodiment of the present invention;

[0030] Figure 5 This is a front view of the connection nodes between standard sections of the trestle in an embodiment of the present invention;

[0031] Figure 6 This is a schematic diagram of the structure of a standard section of a trestle in an embodiment of the present invention;

[0032] Figure 7 This is a schematic diagram of the structure connecting two adjacent standard sections of a trestle bridge in an embodiment of the present invention;

[0033] Figure 8 This is a schematic diagram of the structure in an embodiment of the present invention, in which two adjacent arched beams are connected side by side by a connecting rod;

[0034] Among them, 1 is the first connecting lug; 2 is the wire rope; 3 is the arched crossbeam; 4 is the standard section of the trestle; 5 is the outer connecting plate; 6 is the lifting lug of the standard section of the trestle; 7 is the connecting rod; 8 is the lifting lug of the arched crossbeam; 9 is the second connecting lug; 10 is the wire rope perforation plate; and 11 is the bolt. Detailed Implementation

[0035] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but these are not intended to limit the scope of the invention.

[0036] Example 1:

[0037] like Figures 1-4 As shown, this invention discloses an arched cable-stayed temporary steel trestle structure, including a steel trestle body, an arched crossbeam 3, and steel wire ropes 2. The steel trestle body includes at least two standard trestle sections 4 (only two standard trestle sections 4 are shown in the figure). At least two first connecting lugs 1 (only two first connecting lugs 1 are shown in the figure) are fixed to both ends of each standard trestle section 4. Adjacent standard trestle sections 4 are detachably connected together through the first connecting lugs 1, and lifting lugs 6 are welded and fixed to the upper surfaces of both sides of each standard trestle section 4. To facilitate hoisting and subsequent threading of the wire rope 2; both ends of the arched beam 3 are fixed with second connecting lugs 9. The two ends of the arched beam 3 are respectively detachably connected to the first connecting lugs 1 on both sides of the steel trestle body through the second connecting lugs 9 and high-strength bolts 11. Adjacent arched beams 3 are connected together by connecting rods 7. The lower surface of each arched beam 3 is fixed with wire rope perforated plates 10 at intervals. The wire rope 2 passes through the wire rope perforated plates 10 and the lifting lugs 6 of the standard section of the trestle to connect the middle part of the arched beam 3 and the steel trestle body together.

[0038] Specifically, the aforementioned steel trestle bridge body also includes an outer connecting plate 5. Two first connecting lugs 1 of adjacent standard sections 4 of the trestle bridge abut against each other. The outer connecting plate 5 covers the outer side of the two abutting first connecting lugs 1 and is fixedly connected to the two first connecting lugs 1 by bolts 11 (the outer connecting plate 5 is firmly covered on the outer side of each of the two abutting first connecting lugs 1). Specifically, the outer connecting plate 5 has two screw holes corresponding to the bolt holes on the two first connecting lugs 1, so as to fix the outer connecting plate 5 to the two first connecting lugs 1 by bolts 11.

[0039] In a specific embodiment of the present invention, the arched crossbeam 3 is made of round steel, the standard section 4 of the trestle bridge is made of shaped steel, and the upper surface of the arched crossbeam 3 is provided with a lifting lug (i.e., the lifting lug 8 of the arched crossbeam).

[0040] Example 2:

[0041] like Figures 6-8 As shown, this invention discloses a construction method for an arched cable-stayed temporary steel trestle bridge structure. Specifically, the construction method includes the following steps:

[0042] Step 1: Provide at least two standard trestle sections 4. At least two first connecting lugs 1 are fixed at both ends of each standard trestle section 4 (for connecting standard trestle sections 4 with each other and with the arched crossbeam 3). Lifting lugs (i.e., lifting lugs 6 of the standard trestle section) are fixed on the upper surfaces of both sides of each standard trestle section 4. Figure 6 This is a structural diagram of a standard section 4 of a trestle bridge.

[0043] Specifically, during fabrication / processing, the steel sections are assembled into standard trestle sections 4 and the first connecting lug 1 is welded on. To facilitate on-site hoisting, lifting lugs are welded onto the top of the standard trestle sections 4, and the prefabricated standard trestle sections 4 are then placed flat on the construction site. Because the prefabricated standard trestle sections 4 can be mass-produced, the material recycling rate is increased, and the manufacturing quality of the standard trestle sections 4 processed in the factory is greatly improved.

[0044] Step 2: Connect at least two standard trestle sections 4 sequentially and detachably together via the first connecting lug 1 to form the steel trestle body. Specifically, connect the corresponding number of standard trestle sections 4 according to site requirements; this allows for the installation of the corresponding standard sections based on site construction needs, thereby maximizing adaptability to site conditions and expanding the range of movement.

[0045] Specifically, the steps of sequentially and detachably connecting at least two standard trestle sections 4 together via first connecting lugs 1 to form the steel trestle body include:

[0046] The first connecting lugs 1 of adjacent standard sections 4 of the trestle bridge abut against each other;

[0047] The outer connecting plate 5 is used to cover the outside of the two abutting first connecting lugs 1 and is fixedly connected to the two first connecting lugs 1 by high-strength bolts 11.

[0048] Step 3: Provide at least two arched beams 3, and connect adjacent arched beams 3 side by side with connecting rods 7 to form an arched beam structure (use connecting rods 7 for the upper arched beams 3 and connect them with high-strength bolts 11), and fix a second connecting lug 9 at both ends of the arched beams 3, and fix steel wire rope perforated plates 10 at intervals on the lower surface of each arched beam 3.

[0049] Step 4: The arched beam structure is detachably connected to the first connecting plates 1 on both sides of the steel trestle body via the second connecting lugs 9 and bolts 11. Specifically, the first connecting plates 1 at both ends of the arched beam 3 are connected to the second connecting plates 9 at both ends of the steel trestle body using high-strength bolts 11.

[0050] Step 5: Use steel wire rope 2 to pass through the steel wire rope perforation plate 10 and the lifting lug 6 of the standard section of the trestle bridge to connect the middle part of the arched crossbeam 3 to the steel trestle bridge body. Specifically, use steel wire rope 2 to connect the remaining parts (the connection method is to pass through the holes of the steel wire rope perforation plate 10 and the lifting lug 6 of the standard section of the trestle bridge, and fix it with rope clamps), and apply prestress to the steel wire rope 2 to make the arched trestle bridge form a stable system as a whole.

[0051] In this invention, the arched beam 3 and the standard section 4 of the trestle bridge are connected to form a stable system by steel wire rope 2. The internal forces of the vertical structure are all axial forces, so that the stress of the structure conforms to the stress characteristics of the material and the cross section of the material is reduced, thereby meeting the needs of on-site construction vehicle passage in a more economical and reasonable way.

[0052] Specifically, the aforementioned arched crossbeam 3 is made of round steel, the aforementioned standard section 4 of the trestle bridge is composed of shaped steel, and the upper surface of the aforementioned arched crossbeam 3 is provided with lifting lugs (i.e., lifting lugs 8 of the arched crossbeam).

[0053] In summary, this invention provides a construction method for a temporary steel trestle structure with arched cables, designed for safe and convenient use by mobile cranes, and designed to increase material turnover in on-site construction situations. The method utilizes high-strength bolts to connect the two standard sections of the trestle and the steel trestle body to the arched beam support, with the length adjustable according to the actual site conditions. Furthermore, the arched beam structure is connected to the steel trestle body by wire ropes, significantly enhancing its load-bearing capacity. This also allows for the use of more versatile and recyclable trestle frame materials, improving construction efficiency and reducing material damage.

[0054] Those skilled in the art should understand that variations can be implemented by combining existing technology with the above embodiments, which will not be elaborated here. Such variations do not affect the essence of the present invention, and will not be elaborated here either.

[0055] The preferred embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and the devices and structures not described in detail should be understood as being implemented in a conventional manner in the art. Any person skilled in the art can make many possible variations and modifications to the technical solutions of the present invention using the methods and techniques disclosed above, or modify them into equivalent embodiments with equivalent changes, without departing from the scope of the present invention. This does not affect the essential content of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the present invention's technical solutions still fall within the protection scope of the present invention.

Claims

1. An arched cable-stayed temporary steel trestle bridge structure, characterized in that, Includes the steel trestle bridge body, arched crossbeams, and steel wire ropes; The steel trestle bridge body includes at least two standard trestle sections. At least two first connecting lugs are fixed at both ends of each standard trestle section. Adjacent standard trestle sections are detachably connected together through the first connecting lugs. Lifting lugs are fixed on both upper surfaces of each standard trestle section. Both ends of the arched crossbeam are fixed with second connecting lugs. The two ends of the arched crossbeam are detachably connected to the first connecting lugs on both sides of the steel trestle body through the second connecting lugs. Adjacent arched crossbeams are connected together by connecting rods. Steel wire rope perforation plates are fixed at intervals on the lower surface of each arched crossbeam. The steel wire rope passes through the steel wire rope perforation plates and the lifting lugs of the standard section of the trestle to connect the middle part of the arched crossbeam to the steel trestle body. The temporary steel trestle structure also includes an outer connecting plate. The first connecting lugs of adjacent standard sections of the trestle abut against each other. The outer connecting plate covers the outside of the two abutting first connecting lugs and is fixedly connected to the two first connecting lugs with bolts. The second connecting ear plate is detachably connected to the first connecting ear plate by bolts.

2. The arched cable-stayed temporary steel trestle bridge structure as described in claim 1, characterized in that, The arched crossbeams are made of round steel, and the standard sections of the trestle bridge are composed of shaped steel sections.

3. The arched cable-stayed temporary steel trestle bridge structure as described in claim 1, characterized in that, The upper surface of the arched beam is provided with lifting lugs.

4. A construction method for an arched cable-stayed temporary steel trestle bridge structure, characterized in that, Includes the following steps: At least two standard trestle sections are provided, each of which has at least two first connecting lugs fixed at both ends, and each of which has lifting lugs fixed on both upper surfaces. At least two standard trestle sections are sequentially and detachably connected together via the first connecting lug to form the steel trestle body; The step of sequentially and detachably connecting at least two standard trestle sections together via the first connecting lugs to form the steel trestle body includes: abutting the first connecting lugs of adjacent standard trestle sections against each other; covering the outside of the two abutting first connecting lugs with an outer connecting plate and fixing the outer connecting plate to the two first connecting lugs together with bolts. At least two arched beams are provided, and adjacent arched beams are connected side by side by connecting rods to form an arched beam structure. Both ends of the arched beams are fixed with second connecting lugs, and the lower surface of each arched beam is fixed with wire rope perforated plates at intervals. The arched beam structure is detachably connected to the first connecting ear plates on both sides of the steel trestle body via the second connecting ear plate; The middle part of the arched crossbeam and the steel trestle body are connected together by using steel wire ropes that pass through the steel wire rope perforated plate and the lifting lugs of the standard section of the trestle; Prestress is applied to the steel wire rope to make the arched trestle bridge a stable system.

5. The construction method of the arched cable-stayed temporary steel trestle bridge structure as described in claim 4, characterized in that, The second connecting ear plate is detachably connected to the first connecting ear plate by bolts.

6. The construction method of the arched cable-stayed temporary steel trestle bridge structure as described in claim 4, characterized in that, The arched crossbeams are made of round steel, and the standard sections of the trestle bridge are composed of shaped steel sections.

7. The construction method of the arched cable-stayed temporary steel trestle bridge structure as described in claim 4, characterized in that, The upper surface of the arched beam is provided with lifting lugs.

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