An assembled steel bridge and a method for erecting the same

Abstract

The application discloses an assembled steel bridge and a building method thereof. The bridge comprises a bottom bearing beam which is detachably connected with a base body and a top bearing beam which is located above the bottom bearing beam. The bottom bearing beam and the top bearing beam are both spliced. A support structure is arranged between the bottom bearing beam and the top bearing beam. An I-beam is installed on the top bearing beam. A bridge deck is detachably connected with the top of the I-beam. A first lock for fixing the bottom of the I-beam is installed on the bottom bearing beam. A second lock for fixing the top of the I-beam is installed in the bridge deck. The top bearing beam, the bottom bearing beam and the support structure are all divided into multiple detachable units. The bridge can be conveniently transported and built. The bridge can be quickly built according to the use scene.

Description

Technical Field

[0001] This invention relates to the field of bridge technology, specifically to a prefabricated steel bridge and its construction method. Background Technology

[0002] Prefabricated steel bridges are often used for emergency situations and temporary construction. They are a type of prefabricated bridge that can be quickly disassembled and have been widely used in the field of steel bridges. Prefabricated steel bridges are characterized by simple structure, lightweight components, convenient transportation, flexible combination, rapid erection, convenient disassembly and assembly, and reusable components. They also possess advantages such as high load-bearing capacity, strong structural rigidity, and long fatigue life. Furthermore, they can be assembled into bridges of different spans, types, and uses according to engineering design needs, playing a vital role in domestic and international military transportation, disaster relief, national defense construction, water conservancy projects, and road transportation. Current prefabricated bridges integrate multiple beams into a single component. However, this means that if a part is damaged by rainwater corrosion or other means, the entire structure needs to be replaced, which is inconvenient for transportation. Moreover, the existing connections between Bailey beams and I-beams, as well as between the bridge deck and I-beams, are not very secure. Therefore, we propose a prefabricated steel bridge and its construction method to address these shortcomings. Summary of the Invention

[0003] The purpose of this invention is to provide a prefabricated steel bridge to solve the problems of how to conveniently replace parts of existing bridges when they are damaged by rainwater corrosion or other means, and to improve the locking performance of I-beam clamps.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a prefabricated steel bridge, the bridge comprising a bottom bearing beam detachably connected to a base and a top bearing beam located above the bottom bearing beam, both the bottom bearing beam and the top bearing beam being spliced, a support structure being provided between the bottom bearing beam and the top bearing beam, an I-beam being installed on the top bearing beam, and a bridge deck being detachably connected to the top of the I-beam, wherein a first locking device for fixing the bottom of the I-beam is installed on the bottom bearing beam, and a second locking device for fixing the top of the I-beam is installed inside the bridge deck.

[0005] In a preferred embodiment of the present invention: the bottom bearing beam includes a first assembly beam and a second assembly beam arranged horizontally and symmetrically with respect to the first assembly beam. The first assembly beam and the second assembly beam are detachably connected to a plurality of first intermediate assembly beams arranged at equal intervals. The first assembly beam and the second assembly beam are composed of a plurality of square hollow steel pipes spliced ​​end to end and the splice is fixed by screws. The first assembly beam and the second assembly beam are each connected to a first assembly hub. The two ends of the first intermediate assembly beam are respectively assembled with the first assembly hubs on the first assembly beam and the second assembly beam.

[0006] In a preferred embodiment of the present invention: the top supporting beam includes a third assembly beam and a fourth assembly beam arranged horizontally and symmetrically with respect to the third assembly beam. The third assembly beam and the fourth assembly beam are detachably connected to a plurality of equidistantly arranged second intermediate assembly beams. The third assembly beam and the fourth assembly beam are composed of a plurality of square hollow steel pipes spliced ​​end to end and fixed at the splice by screws. A second assembly hub is connected to both the third assembly beam and the fourth assembly beam. The two ends of the second intermediate assembly beam are respectively assembled with the second assembly hubs of the third assembly beam and the fourth assembly beam.

[0007] In a preferred embodiment of the present invention: a plurality of third assembly hubs are fixedly connected to the first intermediate assembly beam, a plurality of fourth assembly hubs are fixedly connected to the second intermediate assembly beam, and the support mechanism includes a first support unit connected between the first assembly hub and the second assembly hub, and a second support unit connected between the third assembly hub and the fourth assembly hub.

[0008] In a preferred embodiment of the present invention: there are multiple first assembly hubs and second assembly hubs arranged at equal intervals. The first support unit includes a first support beam connecting each vertically symmetrical first assembly hub and second assembly hub; and a second support beam connecting each staggered first assembly hub and second assembly hub; two adjacent first support beams are parallel to each other, and two adjacent second support beams form a 90-degree angle in space.

[0009] In a preferred embodiment of the present invention: there are multiple third assembly hubs and fourth assembly hubs arranged at equal intervals. The second support unit includes a third support beam connecting each vertically symmetrical third assembly hub and fourth assembly hub; and a fourth support beam connecting each staggered third assembly hub and fourth assembly hub. Two adjacent third support beams are parallel to each other, and two adjacent fourth support beams form a 90-degree angle in space.

[0010] As a preferred embodiment of the present invention: the bridge further includes reinforcing beams, the reinforcing beams including a first reinforcing beam group for installation between the first assembly beam and the first intermediate assembly beam, between the second assembly beam and the first intermediate assembly beam, between the third assembly beam and the second intermediate assembly beam, and between the fourth assembly beam and the second intermediate assembly beam; and a second reinforcing beam group for installation between two adjacent first intermediate assembly beams and between two adjacent second intermediate assembly beams.

[0011] In a preferred embodiment of the present invention: the bridge deck includes multiple longitudinal and transverse partitions interlaced, with multiple U-shaped plates inserted through the transverse partitions; the second lock includes a first housing mounted on the bottom of the U-shaped plates; a first baffle is fixedly connected to the U-shaped plates; a first bolt is connected to the first baffle; a first clamping rod and a second clamping rod are rotatably connected inside the first housing; both the first and second clamping rods rotate via a first rotating shaft and the first housing; a first connecting rod is rotatably connected to the first and second clamping rods; a first lifting plate is rotatably connected between the two first connecting rods; and the first lifting plate is threadedly connected to the first bolt.

[0012] In a preferred embodiment of the present invention: the first lock includes a cavity mounted on the second assembly beam, a second housing is installed in the cavity, a second baffle is installed at the bottom of the second assembly beam, a second bolt is connected to the second baffle, a third clamping rod and a fourth clamping rod are rotatably connected in the second housing, the third clamping rod and the fourth clamping rod are both rotatably connected to the second housing through a second rotating shaft, a second connecting rod is rotatably connected to the third clamping rod and the fourth clamping rod, a second lifting plate is rotatably connected between the two second connecting rods, and the second bolt is threadedly screwed into the second lifting plate.

[0013] In a preferred embodiment of the present invention: the first lock and the second lock are provided with an auxiliary locking mechanism. The auxiliary locking mechanism includes a plurality of bottom clamps that are independently rotatably connected to the first clamp, the second clamp, the third clamp, and the fourth clamp. The bottom clamps are connected to anti-slip blocks, which abut against the bottom of the I-beam. The auxiliary locking mechanism also includes a connecting part located between the first bolt and the top of the I-beam and between the second bolt and the bottom of the I-beam. When the first bolt and the second bolt are tightened, the connecting part is used to push the bottom clamps closer to the I-beam.

[0014] As a preferred embodiment of the present invention: the connecting part includes a first plate located below the two symmetrical bottom clamping rods, the bottom of the bottom clamping rod is provided with a sliding groove, a first sliding seat is slidably connected in the sliding groove, a first connecting rod is provided between the first sliding seat and the first plate, the two ends of the first connecting rod are respectively rotatably connected to the first sliding seat and the first plate, and the bottom of the first plate is provided with stepped protrusions connected in sequence.

[0015] In a preferred embodiment of the present invention: the connecting part includes a second plate located at the bottom of two symmetrical bottom clamping rods, the bottom of the bottom clamping rod is provided with a sliding groove, a sliding rod is fixedly connected in the sliding groove, a second sliding seat is slidably connected on the sliding rod, a second connecting rod is rotatably connected between the two symmetrical second sliding seats and the second plate, a spring is sleeved on the sliding rod, and the two ends of the spring respectively abut against the second sliding seat and the side of the sliding groove away from the second plate.

[0016] A method for constructing a prefabricated bridge involves pouring a foundation in a waterway and installing a bottom load-bearing beam onto the poured foundation. After the bottom load-bearing beam is installed, a support structure is installed above it, and a top load-bearing beam is installed separately above the support structure. A second locking device is installed on the top load-bearing beam, and the I-beam is installed using this second locking device. Finally, the bridge deck is removed, and the bridge deck is installed to the I-beam using the second locking device.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: the bottom bearing beam is installed on the cast-in-place base; after the bottom bearing beam is installed, the support structure is installed above the bottom bearing beam, and the top bearing beam is installed separately above the support structure. A second locking device is installed on the top bearing beam, and the I-beam is installed through the second locking device. Finally, the bridge deck is taken out and the bridge deck is installed with the I-beam through the second locking device. Since the present invention decomposes the top bearing beam, the bottom bearing beam, and the support structure into multiple detachable units, it is convenient for transportation and construction, and the bridge can be quickly constructed according to the usage scenario. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a prefabricated steel bridge according to the present invention. Figure 1 ;

[0019] Figure 2 This is a schematic diagram of the structure of a prefabricated steel bridge according to the present invention. Figure 2 ;

[0020] Figure 3 This is a schematic diagram of the structure of a prefabricated steel bridge according to the present invention. Figure 3 ;

[0021] Figure 4 This is a schematic diagram of the structure of a prefabricated steel bridge according to the present invention. Figure 4 ;

[0022] Figure 5 This is a bottom view of a prefabricated steel bridge according to the present invention;

[0023] Figure 6 This is a schematic diagram of the structure of the first and second locking devices for prefabricated steel bridges according to the present invention;

[0024] Figure 7 This invention relates to a prefabricated steel bridge. Figure 2 A structural diagram of section B;

[0025] Figure 8 This invention relates to a prefabricated steel bridge. Figure 2 A schematic diagram of the structure of part A;

[0026] Figure 9 This invention relates to a prefabricated steel bridge. Figure 4 A structural diagram of section C;

[0027] Figure 10 This is a schematic diagram of the overall structure of the first embodiment of the auxiliary locking mechanism in a prefabricated steel bridge according to the present invention;

[0028] Figure 11 This is a partial structural schematic diagram of a first embodiment of an auxiliary locking mechanism in a prefabricated steel bridge according to the present invention;

[0029] Figure 12 This is a schematic diagram of the second embodiment of the auxiliary locking mechanism in a prefabricated steel bridge according to the present invention.

[0030] In the diagram: 100, bottom load-bearing beam; 101, first assembly beam; 102, second assembly beam; 103, first intermediate assembly beam; 104, first assembly hub; 105, third assembly hub; 200, top load-bearing beam; 201, third assembly beam; 202, fourth assembly beam; 203, second intermediate assembly beam; 204, second assembly hub; 205, fourth assembly hub; 300, first support beam; 301, second support beam; 302, third support beam; 303, fourth support beam; 400, first reinforcing beam group; 401, second reinforcing beam group; 500, I-beam; 501, cavity; 502, second shell; 503, third clamping rod; 504, fourth clamping rod; 505. Second pivot; 506, Second lifting plate; 507, Second connecting rod; 508, Second baffle; 509, Second bolt; 602, First housing; 603, First clamping rod; 604, Second clamping rod; 605, First pivot; 606, First lifting plate; 607, First connecting rod; 608, First baffle; 609, First bolt; 700, Bridge deck; 701, U-shaped plate; 702, Transverse partition; 800, Bottom clamping rod; 801, Anti-slip block; 802, First slide block; 803, First plate; 804, Stepped boss; 805, First connecting rod; 806, Slide rod; 807, Second slide block; 808, Spring; 809, Second connecting rod; 810, Second plate. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0032] It should be understood that the terms "comprising / including," "consisting of," or any other variations are intended to cover non-exclusive inclusion, such that a product, apparatus, process, or method that comprises a list of elements includes not only those elements but may also include, where necessary, other elements not expressly listed, or elements inherent to such a product, apparatus, process, or method. Without further limitation, an element defined by the phrases "comprising / including," "consisting of," does not exclude the presence of additional identical elements in the product, apparatus, process, or method that includes said element.

[0033] It should also be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device, component or structure referred to must have a specific orientation, be constructed or operated in a specific orientation, and should not be construed as a limitation of the present invention.

[0034] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0035] The technical solutions provided by the various embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0036] Please see Figures 1-9This invention provides an embodiment of a prefabricated steel bridge, comprising a bottom load-bearing beam 100 detachably connected to a base and a top load-bearing beam 200 located above the bottom load-bearing beam 100. Both the bottom load-bearing beam 100 and the top load-bearing beam 200 are spliced. A support structure is provided between the bottom load-bearing beam 100 and the top load-bearing beam 200. An I-beam 500 is mounted on the top load-bearing beam 200, and a bridge deck 700 is detachably connected to the top of the I-beam 500. A first locking device for fixing the bottom of the I-beam 500 is installed on the bottom load-bearing beam 100. The bridge deck 700 is equipped with a second locking device for fixing the top of the I-beam 500. First, the base is poured in the waterway, which can be done through the current bridge pier. The bottom bearing beam 100 is then installed on the poured base. After the bottom bearing beam 100 is installed, the support structure is installed above the bottom bearing beam 100, and the top bearing beam 200 is installed separately on the support structure. The second locking device is installed on the top bearing beam 200, and the I-beam 500 is installed using the second locking device. Finally, the bridge deck 700 is removed, and the bridge deck 700 and the I-beam 500 are installed using the second locking device.

[0037] Please see Figures 1-9A prefabricated steel bridge includes a bottom load-bearing beam 100 detachably connected to a base and a top load-bearing beam 200 located above the bottom load-bearing beam 100. Both the bottom load-bearing beam 100 and the top load-bearing beam 200 are spliced. A support structure is provided between the bottom load-bearing beam 100 and the top load-bearing beam 200. An I-beam 500 is installed on the top load-bearing beam 200, and a bridge deck 700 is detachably connected to the top of the I-beam 500. A first locking device for fixing the bottom of the I-beam 500 is installed on the bottom load-bearing beam 100, and a second locking device for fixing the top of the I-beam 500 is installed within the bridge deck 700. The base is first poured in a waterway, which can be done using existing piers, and the bottom load-bearing beam 100 is then installed on the poured base. After the bottom load-bearing beam 100 is installed, the support structure is installed above the bottom load-bearing beam 100, and the top load-bearing beam 200 is then... The body is installed above the supporting structure, and a second locking device is installed on the top bearing beam 200. The I-beam 500 is installed through the second locking device. Finally, the bridge deck 700 is removed, and the bridge deck 700 is installed to the I-beam 500 through the second locking device. In one embodiment of the present invention, the bottom bearing beam 100 includes a first assembly beam 101 and a second assembly beam 102 arranged horizontally and symmetrically with the first assembly beam 101. The first assembly beam 101 and the second assembly beam 102 are detachably connected to a plurality of equidistantly arranged first intermediate assembly beams 103. The first assembly beam 101 and the second assembly beam 102 are composed of a plurality of square hollow steel pipes spliced ​​end to end, and the splice is fixed by screws. A first assembly hub 104 is connected to both the first assembly beam 101 and the second assembly beam 102. The two ends of the first intermediate assembly beam 103 are respectively assembled with the first assembly hubs 104 on the first assembly beam 101 and the second assembly beam 102. Figure 1 As shown, it should be noted that the first assembly beam 101 and the second assembly beam 102 are spliced. The square hollow steel pipe can be fixed with screws or welded at the end.

[0038] Please see Figures 1-9A prefabricated steel bridge includes a bottom load-bearing beam 100 detachably connected to a base and a top load-bearing beam 200 located above the bottom load-bearing beam 100. Both the bottom load-bearing beam 100 and the top load-bearing beam 200 are spliced. A support structure is provided between the bottom load-bearing beam 100 and the top load-bearing beam 200. An I-beam 500 is installed on the top load-bearing beam 200, and a bridge deck 700 is detachably connected to the top of the I-beam 500. A first locking device for fixing the bottom of the I-beam 500 is installed on the bottom load-bearing beam 100, and a second locking device for fixing the top of the I-beam 500 is installed within the bridge deck 700. The base is first poured in a waterway, which can be done using existing piers, and the bottom load-bearing beam 100 is then installed on the poured base. After the bottom load-bearing beam 100 is installed, the support structure is installed above the bottom load-bearing beam 100, and the top load-bearing beam 200 is then installed in a separate manner. An embodiment of the present invention is provided, wherein the top load-bearing beam 200 is installed above the supporting structure, and a second locking device is installed on the top load-bearing beam 200 and the I-beam 500 is installed through the second locking device. Finally, the bridge deck 700 is removed and the bridge deck 700 is installed with the I-beam 500 through the second locking device. The top load-bearing beam 200 includes a third assembly beam 201 and a fourth assembly beam 202 arranged horizontally and symmetrically with the third assembly beam 201. The third assembly beam 201 and the fourth assembly beam 202 are detachably connected to a plurality of equidistantly arranged second intermediate assembly beams 203. The third assembly beam 201 and the fourth assembly beam 202 are composed of a plurality of square hollow steel pipes spliced ​​end to end and the splice is fixed by screws. A second assembly hub 204 is connected to both the third assembly beam 201 and the fourth assembly beam 202. The two ends of the second intermediate assembly beam 203 are respectively assembled with the second assembly hub 204 of the third assembly beam 201 and the fourth assembly beam 202.

[0039] Please see Figures 1-9A prefabricated steel bridge includes a bottom load-bearing beam 100 detachably connected to a base and a top load-bearing beam 200 located above the bottom load-bearing beam 100. Both the bottom load-bearing beam 100 and the top load-bearing beam 200 are spliced. A support structure is provided between the bottom load-bearing beam 100 and the top load-bearing beam 200. An I-beam 500 is mounted on the top load-bearing beam 200, and a bridge deck 700 is detachably connected to the top of the I-beam 500. A first locking device for fixing the bottom of the I-beam 500 is installed on the bottom load-bearing beam 100, and a second locking device for fixing the top of the I-beam 500 is installed within the bridge deck 700. The base is first poured in a waterway, which can be constructed using existing piers, and then the bottom load-bearing beam 100 is installed on the poured base. After the bottom bearing beam 100 is installed, the support structure is installed above the bottom bearing beam 100, and the top bearing beam 200 is installed separately above the support structure. A second lock is installed on the top bearing beam 200, and the I-beam 500 is installed through the second lock. Finally, the bridge deck 700 is removed, and the bridge deck 700 and the I-beam 500 are installed through the second lock. In one embodiment of the present invention, a plurality of third assembly hubs 105 are fixedly connected to the first intermediate assembly beam 103, and a plurality of fourth assembly hubs 205 are fixedly connected to the second intermediate assembly beam 203. The support mechanism includes a first support unit connected between the first assembly hub 104 and the second assembly hub 204, and a second support unit connected between the third assembly hub 105 and the fourth assembly hub 205.

[0040] It should be noted that the existence of the first assembly hub 104, the second assembly hub 204, the third assembly hub 105 and the fourth assembly hub 205 is to fix the installation between the beams. Therefore, there are no restrictions on the shape of the hubs and the connection ports. They can be designed according to the actual installation requirements.

[0041] Please see Figures 1-9A prefabricated steel bridge includes a bottom load-bearing beam 100 detachably connected to a base and a top load-bearing beam 200 located above the bottom load-bearing beam 100. Both the bottom load-bearing beam 100 and the top load-bearing beam 200 are spliced. A support structure is provided between the bottom load-bearing beam 100 and the top load-bearing beam 200. An I-beam 500 is installed on the top load-bearing beam 200, and a bridge deck 700 is detachably connected to the top of the I-beam 500. A first locking device for fixing the bottom of the I-beam 500 is installed on the bottom load-bearing beam 100, and a second locking device for fixing the top of the I-beam 500 is installed within the bridge deck 700. The base is first poured in a waterway, which can be done using the existing piers, and the bottom load-bearing beam 100 is then installed on the poured base. After the bottom load-bearing beam 100 is installed, the support structure is installed above the bottom load-bearing beam 100. The top load-bearing beam 200 is installed separately on the top load-bearing beam 200, and a second locking device is installed on the top load-bearing beam 200 to complete the installation of the I-beam 500. Finally, the bridge deck 700 is taken and the bridge deck 700 is installed with the I-beam 500 using the second locking device. In one embodiment of the present invention, there are multiple first assembly hubs 104 and second assembly hubs 204 arranged at equal intervals. The first support unit includes a first support beam 300 connecting each vertically symmetrical first assembly hub 104 and second assembly hub 204; and a second support beam 301 connecting each staggered first assembly hub 104 and second assembly hub 204. Two adjacent first support beams 300 are parallel to each other, and two adjacent second support beams 301 are at a 90-degree angle in space. The multiple second support beams 301 intersect at 90 degrees in space, thereby providing the compressive strength of the top load-bearing beam 200.

[0042] Please see Figures 1-9A prefabricated steel bridge includes a bottom load-bearing beam 100 detachably connected to a base and a top load-bearing beam 200 located above the bottom load-bearing beam 100. Both the bottom load-bearing beam 100 and the top load-bearing beam 200 are spliced. A support structure is provided between the bottom load-bearing beam 100 and the top load-bearing beam 200. An I-beam 500 is installed on the top load-bearing beam 200, and a bridge deck 700 is detachably connected to the top of the I-beam 500. A first locking device for fixing the bottom of the I-beam 500 is installed on the bottom load-bearing beam 100, and a second locking device for fixing the top of the I-beam 500 is installed inside the bridge deck 700. The base is first poured in a waterway, which can be done using the existing piers, and then the bottom load-bearing beam 100 is installed on the poured base. After the bottom load-bearing beam 100 is installed, the bridge deck 700 is then... The support structure is installed above the bottom bearing beam 100, and the top bearing beam 200 is separately installed above the support structure. A second locking device is installed on the top bearing beam 200, and the I-beam 500 is installed through the second locking device. Finally, the bridge deck 700 is taken out, and the bridge deck 700 and the I-beam 500 are installed through the second locking device. In one embodiment of the present invention, there are multiple third assembly hubs 105 and fourth assembly hubs 205, which are arranged at equal intervals. The second support unit includes a third support beam 302 connecting each vertically symmetrical third assembly hub 105 and fourth assembly hub 205; and a fourth support beam 303 connecting each staggered third assembly hub 105 and fourth assembly hub 205. Two adjacent third support beams 302 are parallel to each other, and two adjacent fourth support beams 303 are at a 90-degree angle in space.

[0043] Please see Figures 1-9A prefabricated steel bridge includes a bottom bearing beam 100 detachably connected to a base and a top bearing beam 200 located above the bottom bearing beam 100. Both the bottom bearing beam 100 and the top bearing beam 200 are spliced. A support structure is provided between the bottom bearing beam 100 and the top bearing beam 200. An I-beam 500 is installed on the top bearing beam 200, and a bridge deck 700 is detachably connected to the top of the I-beam 500. A first locking device for fixing the bottom of the I-beam 500 is installed on the bottom bearing beam 100, and a second locking device for fixing the top of the I-beam 500 is installed inside the bridge deck 700. The base is first poured in a waterway, which can be done using the existing piers, and the bottom bearing beam 100 is then installed on the poured base. After the bottom bearing beam 100 is installed, the support structure is then... The structure is installed above the bottom supporting beam 100, and the top supporting beam 200 is separately installed above the supporting structure. A second locking device is installed on the top supporting beam 200, and the I-beam 500 is installed through the second locking device. Finally, the bridge deck 700 is removed, and the bridge deck 700 and the I-beam 500 are installed through the second locking device. In one embodiment of the present invention, the bridge also includes a reinforcing beam, which includes a first reinforcing beam group 400 for installation between the first assembly beam 101 and the first intermediate assembly beam 103, between the second assembly beam 102 and the first intermediate assembly beam 103, between the third assembly beam 201 and the second intermediate assembly beam 203, and between the fourth assembly beam 202 and the second intermediate assembly beam 203; and a second reinforcing beam group 401 for installation between two adjacent first intermediate assembly beams 103 and between two adjacent second intermediate assembly beams 203.

[0044] Please see Figures 1-9A prefabricated steel bridge includes a bottom load-bearing beam 100 detachably connected to a base and a top load-bearing beam 200 located above the bottom load-bearing beam 100. Both the bottom load-bearing beam 100 and the top load-bearing beam 200 are spliced. A support structure is provided between the bottom load-bearing beam 100 and the top load-bearing beam 200. An I-beam 500 is mounted on the top load-bearing beam 200, and a bridge deck 700 is detachably connected to the top of the I-beam 500. The bottom load-bearing beam 100 is equipped with... A first locking device is installed to fix the bottom of the I-beam 500, and a second locking device is installed inside the bridge deck 700 to fix the top of the I-beam 500. First, the base is poured in the waterway, which can be done using the existing piers, and the bottom bearing beam 100 is installed on the poured base. After the bottom bearing beam 100 is installed, the support structure is installed above the bottom bearing beam 100, and the top bearing beam 200 is separately installed above the support structure, and then installed on the top bearing beam 200. The second locking device completes the installation of the I-beam 500. Finally, the bridge deck 700 is removed and the second locking device completes the installation of the bridge deck 700 and the I-beam 500. One embodiment of the present invention provides: the bridge deck 700 includes multiple longitudinal and transverse partitions 702 interlaced, with multiple U-shaped plates 701 inserted through the transverse partitions 702. The first locking device includes a first housing 602 installed at the bottom of the U-shaped plates 701, and a first baffle 608 is fixedly connected to the U-shaped plates 701. A first bolt 609 is connected to the first baffle 608. A first clamping rod 603 and a second clamping rod 604 are rotatably connected inside the first housing 602. The first clamping rod 603 and the second clamping rod 604 are both rotated through a first rotating shaft 605 and the first housing 602. A first connecting rod 607 is rotatably connected to the first clamping rod 603 and the second clamping rod 604. A first lifting plate 606 is rotatably connected between the two first connecting rods 607. The first lifting plate 606 is threadedly screwed to the first bolt 609.

[0045] Please see Figures 1-9A prefabricated steel bridge includes a bottom load-bearing beam 100 detachably connected to a base and a top load-bearing beam 200 located above the bottom load-bearing beam 100. Both the bottom load-bearing beam 100 and the top load-bearing beam 200 are spliced. A support structure is provided between the bottom load-bearing beam 100 and the top load-bearing beam 200. An I-beam 500 is installed on the top load-bearing beam 200, and a bridge deck 700 is detachably connected to the top of the I-beam 500. A first locking device for fixing the bottom of the I-beam 500 is installed on the bottom load-bearing beam 100, and a second locking device for fixing the top of the I-beam 500 is installed within the bridge deck 700. The base is first poured in a waterway, which can be done using existing piers, and the bottom load-bearing beam 100 is then installed on the poured base. After the bottom load-bearing beam 100 is installed, the support structure is installed above the bottom load-bearing beam 100, and the top load-bearing beam 200 is then installed. The second lock is installed on the top of the supporting structure in a split manner. A second lock is installed on the top load-bearing beam 200 and the I-beam 500 is installed through the second lock. Finally, the bridge deck 700 is removed and the bridge deck 700 is installed with the I-beam 500 through the second lock. In one embodiment of the present invention, the second lock includes a cavity 501 installed on the second assembly beam. A second housing 502 is installed in the cavity 501. A second baffle 508 is installed at the bottom of the second assembly beam 102. A second bolt 509 is connected to the second baffle 508. A third clamping rod 503 and a fourth clamping rod 504 are rotatably connected in the second housing 502. The third clamping rod 503 and the fourth clamping rod 504 are rotatably connected to the second housing 502 through a second rotating shaft 505. A second connecting rod 507 is rotatably connected to the third clamping rod 503 and the fourth clamping rod 504. A second lifting plate 506 is rotatably connected between the two second connecting rods 507. The second bolt 509 is threadedly screwed into the second lifting plate 506.

[0046] Please see Figures 10-12In this embodiment, the first and second locks are provided with an auxiliary locking mechanism. The auxiliary locking mechanism includes multiple bottom clamping rods 800 that are independently rotatably connected to the first clamping rod 603, the second clamping rod 604, the third clamping rod 503, and the fourth clamping rod 504. Anti-slip blocks 801 are connected to the bottom clamping rods 800, and the anti-slip blocks 801 abut against the bottom of the I-beam 500. The auxiliary locking mechanism also includes a first bolt 609 located between the first bolt 609 and the top of the I-beam 500, and a second bolt 509 located between the second bolt 509 and the top of the I-beam 500. The connecting part between the bottoms, when the first bolt 609 and the second bolt 509 are tightened, is used to push the bottom clamping rod 800 closer to the I-beam 500. As the bolts are tightened, the connecting part drives the bottom clamping rod 800 closer to the I-beam 500, thereby causing the anti-slip block 801 to clamp with the I-beam 800. Compared with conventional locks, this has better clamping performance and can increase the anti-disengagement performance of the clamping rod while locking the I-beam 500. The specific implementation of the connecting part is disclosed below:

[0047] The option is to refer to Figure 11 An embodiment of the present invention provides: the connecting part includes a first plate 803 located below two symmetrical bottom clamping rods 800. The bottom of the bottom clamping rod 800 is provided with a sliding groove, and a first sliding seat 802 is slidably connected in the sliding groove. A first connecting rod 805 is provided between the first sliding seat 802 and the first plate 803. The two ends of the first connecting rod 805 are rotatably connected to the first sliding seat 802 and the first plate 803, respectively. The bottom of the first plate 803 is provided with stepped protrusions 804 connected in sequence. By moving the first plate 803, the stepped protrusions 804 of different depths can be selected, thereby changing the clamping force of the bottom clamping rods 800.

[0048] Another option is to refer to Figure 11 Another embodiment of the present invention is provided: This embodiment is basically the same as the first embodiment, except that the connecting part includes a second plate 810 located at the bottom of two symmetrical bottom clamping rods 800. The bottom of the bottom clamping rod 800 is provided with a sliding groove, and a sliding rod 806 is fixedly connected in the sliding groove. A second sliding seat 807 is slidably connected on the sliding rod 806. A second connecting rod 809 is rotatably connected between the two symmetrical second sliding seats 807 and the second plate 810. A spring 808 is sleeved on the sliding rod 806. The two ends of the spring 808 respectively abut against the second sliding seat 807 and the side of the sliding groove away from the second plate 810. In this embodiment, the connecting part achieves elastic locking. As the bolt is continuously tightened, the spring is compressed and the bottom clamping rod 800 is driven to rotate at the same time, thereby achieving locking of the anti-sliding block 801 and the I-beam 500.

[0049] The construction method of this invention is as follows: First, the base is poured in a waterway, and the bottom bearing beam 100 is installed on the poured base. After the bottom bearing beam 100 is installed, the support structure is installed above the bottom bearing beam 100, and the top bearing beam 200 is installed separately on the support structure. A second locking device is installed on the top bearing beam 200, and the I-beam 500 is installed through the second locking device. Finally, the bridge deck 700 is taken and the bridge deck 700 is installed with the I-beam 500 through the second locking device. Since this invention decomposes the top bearing beam 200, the bottom bearing beam 100, and the support structure into multiple detachable units, it is convenient for transportation and construction, and can quickly construct bridges according to the usage scenario.

[0050] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A fabricated steel bridge characterized by: The bridge comprises a bottom bearing beam detachably connected with the base body and a top bearing beam located above the bottom bearing beam, the bottom bearing beam and the top bearing beam are spliced, a support structure is arranged between the bottom bearing beam and the top bearing beam, an I-beam is mounted on the top bearing beam, and a bridge deck is detachably connected with the top of the I-beam, wherein a first lock for fixing the bottom of the I-beam is mounted on the bottom bearing beam, a second lock for fixing the top of the I-beam is mounted in the bridge deck, the bottom bearing beam comprises a first assembly beam and a second assembly beam which is horizontally symmetrically arranged with the first assembly beam, and the top bearing beam comprises a third assembly beam and a fourth assembly beam which is horizontally symmetrically arranged with the third assembly beam; The bridge deck comprises a plurality of longitudinal partitions and transverse partitions staggered, a plurality of U-shaped plates are inserted on the transverse partitions, the second lock comprises a first housing mounted on the bottom of the U-shaped plate, a first baffle is fixedly connected on the U-shaped plate, a first bolt is connected on the first baffle, a first clamping rod and a second clamping rod are rotationally connected in the first housing, the first clamping rod and the second clamping rod are rotationally connected with the first housing through a first rotating shaft, a first connecting rod is rotationally connected on the first clamping rod and the second clamping rod, a first lifting plate is rotationally connected between the two first connecting rods, and the first lifting plate is threadedly screwed with the first bolt; The first lock comprises a cavity mounted on the second assembly beam, a second housing is mounted in the cavity, a second baffle is mounted on the bottom of the second assembly beam, a second bolt is connected on the second baffle, a third clamping rod and a fourth clamping rod are rotationally connected in the second housing, the third clamping rod and the fourth clamping rod are rotationally connected with the second housing through a second rotating shaft, a second connecting rod is rotationally connected on the third clamping rod and the fourth clamping rod, a second lifting plate is rotationally connected between the two second connecting rods, and the second bolt is threadedly screwed with the second lifting plate; An auxiliary locking mechanism is arranged in the first lock and the second lock, the auxiliary locking mechanism comprises a plurality of bottom clamping rods which are independently rotationally connected on the first clamping rod, the second clamping rod, the third clamping rod and the fourth clamping rod, an anti-skid block is connected on the bottom clamping rod, the anti-skid block abuts against the bottom of the I-beam, the auxiliary locking mechanism further comprises a connecting part located between the first bolt and the top of the I-beam and between the second bolt and the bottom of the I-beam, and when the first bolt and the second bolt are tightened, the connecting part is used for pushing the bottom clamping rod to be close to the I-beam; The connecting part comprises a first plate body located below the two symmetrical bottom clamping rods, a sliding groove is arranged on the bottom of the bottom clamping rod, a first sliding seat is slidingly connected in the sliding groove, a first connecting rod is arranged between the first sliding seat and the first plate body, the two ends of the first connecting rod are rotationally connected with the first sliding seat and the first plate body respectively, and a stepped boss is sequentially connected on the bottom of the first plate body.

2. The fabricated steel bridge of claim 1, wherein: The first assembly beam and the second assembly beam are detachably connected with a plurality of equidistantly arranged first intermediate assembly beams, the first assembly beam and the second assembly beam are composed of a plurality of square hollow steel pipes spliced at the head and tail and fixed by screws at the splicing positions, and the first assembly beam and the second assembly beam are both connected with first assembly pivots, and the two ends of the first intermediate assembly beam are assembled with the first assembly pivots on the first assembly beam and the second assembly beam respectively.

3. The fabricated steel bridge of claim 2, wherein: The third assembly beam and the fourth assembly beam are detachably connected with a plurality of equidistantly arranged second intermediate assembly beams, the third assembly beam and the fourth assembly beam are composed of a plurality of square hollow steel pipes spliced at the head and tail and fixed by screws at the splicing positions, and the third assembly beam and the fourth assembly beam are both connected with second assembly pivots, and the two ends of the second intermediate assembly beam are assembled with the second assembly pivots on the third assembly beam and the fourth assembly beam respectively.

4. The fabricated steel bridge of claim 3, wherein: The first intermediate assembly beam is fixedly connected with a plurality of third assembly pivots, the second intermediate assembly beam is fixedly connected with a plurality of fourth assembly pivots, and the support mechanism comprises a first support unit connected between the first assembly pivots and the second assembly pivots and a second support unit connected between the third assembly pivots and the fourth assembly pivots.

5. The fabricated steel bridge of claim 4, wherein: The first assembly pivot and the second assembly pivot are both a plurality of and equidistantly arranged, the first support unit comprises: a first support beam connected between each of the upper and lower vertically symmetrical first assembly pivots and second assembly pivots; and a second support beam connected between each of the upper and lower staggered first assembly pivots and second assembly pivots; The two adjacent first support beams are parallel to each other, and the two adjacent second support beams are at a 90-degree angle in space.

6. The fabricated steel bridge of claim 4, wherein: The third assembly pivot and the fourth assembly pivot are both a plurality of and equidistantly arranged, the second support unit comprises: a third support beam connected between each of the upper and lower vertically symmetrical third assembly pivots and fourth assembly pivots; and a fourth support beam connected between each of the upper and lower staggered third assembly pivots and fourth assembly pivots; The two adjacent third support beams are parallel to each other, and the two adjacent fourth support beams are at a 90-degree angle in space.

7. The fabricated steel bridge of claim 6, wherein: The bridge further comprises a reinforcing beam, the reinforcing beam comprises: a first reinforcing beam group for mounting between the first assembly beam and the first intermediate assembly beam, between the second assembly beam and the first intermediate assembly beam, between the third assembly beam and the second intermediate assembly beam, and between the fourth assembly beam and the second intermediate assembly beam; a second reinforcing beam group for mounting between two adjacent first intermediate assembly beams and between two adjacent second intermediate assembly beams.

8. An erection method of the prefabricated steel bridge according to any one of claims 1 to 7, characterized in that, The base body is poured in a water area river channel, and the bottom bearing beam is mounted on the poured base body; after the bottom bearing beam is mounted, the support structure is mounted above the bottom bearing beam, the top bearing beam is mounted in a split manner above the support structure, the second lock is mounted on the top bearing beam, and the mounting of the I-beam is completed through the second lock; finally, the bridge deck slab is taken, and the mounting of the bridge deck slab and the I-beam is completed through the second lock.

Images