A segmented steel truss bridge and a construction method thereof

Abstract

The application relates to the field of steel truss bridges, and discloses a sectional steel truss bridge which comprises multiple trusses, each of the trusses comprises a road surface plate and two side support frames, one side of each of the side support frames is hinged with multiple support cross beams, the multiple support cross beams connected to the same side support frame are arranged at intervals along the length direction of the side support frame, an adjusting mechanism is arranged on each of the side support frames, the multiple support cross beams located on the same side support frame are connected with the adjusting mechanism corresponding to the side support frame, the adjusting mechanism is used for driving the multiple support cross beams to rotate, and the road surface plate is connected to the multiple support cross beams. The application has the effects of improving the speed of construction personnel in splicing the steel truss bridge on the construction site and improving the installation efficiency of the steel truss bridge on the construction site.

Description

Technical Field

[0001] This application relates to the field of steel truss bridges, and more particularly to a segmented steel truss bridge and its construction method. Background Technology

[0002] Steel truss bridges are among the most competitive bridge types, boasting advantages such as large span capacity, fast construction speed, and ease of industrial manufacturing. With the improvement of steel's strength, toughness, weldability, and other material properties and quality, steel truss bridges are increasingly favored by bridge designers.

[0003] Most existing steel truss bridge constructions adopt an integrated construction scheme of steel truss beams and guide beams for dragging and sliding. Construction workers transport various support beams and other components of the steel truss bridge to the construction site, and then assemble the various support beams together according to the design drawings using high-strength bolts and welding. Then, the road panel is installed on the assembled steel truss, and then the guide beam is installed. Finally, the steel truss is slowly dragged to the bridge pier and fixed using dragging equipment.

[0004] Regarding the aforementioned technologies, the inventors discovered that during the assembly of various support beams at the construction site, the complex environment often leads to a long time required for the installation and splicing of steel trusses, resulting in low splicing efficiency of steel truss bridges at the construction site. Summary of the Invention

[0005] To alleviate the problem of low splicing efficiency of steel truss bridges on construction sites, this application provides a segmented steel truss bridge.

[0006] This application provides a segmented steel truss bridge, which adopts the following technical solution:

[0007] A segmented steel truss bridge includes multiple truss sections. Each truss section includes a road panel and two side supports. Multiple support beams are hinged to one side of each side support. The multiple support beams connected to the same side support are spaced apart along the length of the side support. Each side support is equipped with an adjustment mechanism. The multiple support beams located on the same side support are connected to their corresponding adjustment mechanisms. The adjustment mechanisms are used to drive the multiple support beams to rotate. The road panel is connected to the multiple support beams.

[0008] By adopting the above technical solution, multiple supporting beams are hinged to both side supports. Before the construction of the steel truss bridge, each side support is prefabricated in the factory, and the multiple supporting beams are rotated to be parallel to the length of the side support, thus facilitating the transportation of multiple side supports. After being transported to the construction site, the two side supports are first hoisted to the predetermined installation position using a hoisting mechanism. Then, the multiple supporting beams are rotated using an adjustment mechanism so that they are all perpendicular to the side supports. The road panel is then installed on the multiple supporting beams, thus completing the installation of one truss section. Finally, multiple truss sections are connected together to complete the installation of the steel truss bridge. This improves the speed at which construction workers can assemble the steel truss bridge on the construction site and increases the installation efficiency of the steel truss bridge on the construction site.

[0009] Preferably, the adjusting mechanism includes an adjusting rod, multiple gears, and multiple racks. The adjusting rod is slidably connected to the side support frame. The multiple gears are correspondingly arranged with multiple support beams connected to the same side support frame. Each gear is fixedly connected to its corresponding support beam. The axis of each gear is collinear with the hinge axis of its corresponding support beam. Each rack is fixedly connected to the adjusting rod. The multiple gears are correspondingly arranged with the multiple racks, and each gear meshes with its corresponding rack.

[0010] By adopting the above technical solution, when installing one section of the truss, after the two side supports are hoisted into the predetermined position, the adjusting rod is pushed, which causes the adjusting rod to drive the multiple racks fixedly connected to it to slide. The sliding of the racks drives the gears meshing with them to rotate, thereby driving the rotation of multiple support beams. This allows the multiple support beams to be rotated synchronously to the working angle, and then the road panel can be installed, thus improving the installation efficiency of each section of the truss.

[0011] Preferably, each of the side supports has a connecting hole at one end along its length and a connecting block at the other end along its length.

[0012] By adopting the above technical solution, when installing a steel truss bridge, the connecting hole on the side support of one truss section can be inserted into the connecting block on the side support of another truss section to achieve the initial connection between the two truss sections, which facilitates the subsequent fixing of the adjacent side support sections.

[0013] Preferably, the connecting block is slidably connected to the side support frame, the connecting block slides along the length direction of the side support frame, the sliding distance of the connecting block is less than the length of the connecting block, and the connecting block is fixedly connected to the adjusting rod.

[0014] By adopting the above technical solution, when installing two adjacent side support frames, inserting the side support frame on the next truss frame onto the connecting block of the previous side support frame can simultaneously push the connecting block to slide a certain distance, thereby causing the connecting block to drive the adjusting rod to move, thus realizing the synchronous rotation of multiple supporting beams; while realizing the connection of two adjacent side support frames, the supporting beam on the first side support frame can also be opened simultaneously, further improving the installation efficiency of the steel truss bridge on the construction site.

[0015] Preferably, two support beams located at the same position along the length of the two side supports are considered as a group. The two support beams in the same group are provided with snap-fit ​​grooves at their close ends. A magnet is fixedly connected in one of the snap-fit ​​grooves, and a snap-fit ​​strip is slidably connected in the other snap-fit ​​groove. When the two support beams are aligned, the magnet attracts the snap-fit ​​strip and slides it between the two snap-fit ​​grooves.

[0016] By adopting the above technical solution, a magnet is set in one of the snap-fit ​​slots, and a snap-fit ​​strip is slidably connected in the other snap-fit ​​slot. When both support beams in the same group are rotated to the vertical side support position, the snap-fit ​​strip can be driven to move under the attraction of the magnet, so that the snap-fit ​​strip snaps between the two snap-fit ​​slots, thereby realizing the connection of the two support beams and ensuring the support strength of the two support beams to the road panel.

[0017] Preferably, multiple sets of inserts are fixedly connected to the road surface slab, and the multiple sets of inserts are arranged one-to-one with the multiple sets of support beams. Each support beam has a first slot. Each set of inserts includes two inserts, and the two inserts are arranged one-to-one with the two first slots. The snap-fit ​​strip has two second slots, and the two second slots are arranged one-to-one with the two first slots.

[0018] By adopting the above technical solution, multiple sets of inserts are set on the road surface slab. When installing the road slab, the inserts on the road surface slab are inserted into their corresponding first and second slots to position the road slab. Then, the road slab is fixedly connected to the support beam with high-strength bolts. At the same time, after the insert is inserted into the second slot, the insert can also lock the snap-fit ​​strip to fix the snap-fit ​​strip and ensure the stability of the connection between the two support beams in the same group.

[0019] Preferably, a locking plate is fixedly connected to one end of each side support, the locking plate has a locking groove, and a locking member is provided at the end of the side support away from the locking plate, the locking member being used to engage in the locking groove.

[0020] By adopting the above technical solution, when connecting two adjacent side support frames, as the next side support frame to be installed slides to the next side support frame, the locking piece can just fit into the locking groove opened in the locking plate when the two side support frames abut, thereby achieving the initial locking of the two side support frames. Then, the two side support frames can be reinforced and stabilized with high-strength bolts to ensure the stability of the subsequent fixing of the two side support frames.

[0021] Preferably, a plurality of top support rods are rotatably connected to one of the side supports in the same truss section, and a fastening mechanism is provided on the other side support in the same truss section, the fastening mechanism being used to simultaneously lock the plurality of top support rods between the two side supports.

[0022] By adopting the above technical solution, multiple top support rods are rotatably connected to the top of the side support frame. After the two side support frames are installed in the predetermined position, the multiple top support rods are rotated so that the multiple top support rods are all placed between the two side support frames. Then, the multiple top support rods are synchronously locked between the two side support frames by the fastening mechanism, so as to achieve stable support for the top of the two side support frames.

[0023] Preferably, a construction method for a segmented steel truss bridge includes the following steps:

[0024] S1: Truss prefabrication, which involves prefabricating the various structural components of the truss in the factory;

[0025] S2: Structural component transfer, which involves transporting the prefabricated structural components of the truss from the factory to the construction site;

[0026] S3: Side support frame installation: The side support frame is hoisted to the predetermined installation position using hoisting equipment and then supported.

[0027] S4: Installation of top struts and road panels. The construction workers rotate the top struts to secure them between the two side supports. Then, the next truss section is hoisted and the side supports in the next truss section are pushed to connect with the previous side supports, so that multiple support beams are opened. Then, the road panels are installed, and then the truss sections are installed one by one.

[0028] S5: The truss is stable and reinforced with high-strength bolts between two adjacent side supports;

[0029] S6: Bridge towing, using towing equipment to tow the installed steel truss bridge to the bridge pier, and then fixing the steel truss bridge to the bridge pier.

[0030] By adopting the above technical solution, when constructing a steel truss bridge, the various structural components of the truss are first prefabricated in the factory, then transported to the construction site, and then hoisted and spliced ​​by hoisting equipment to complete the installation of one section of the truss. Then, the truss can be installed section by section, which improves the convenience of steel truss bridge installation.

[0031] In summary, this application includes at least the following beneficial technical effects:

[0032] 1. By hinged multiple support beams on two side supports, when assembling a steel truss bridge, the two side supports are first hoisted to the predetermined installation position using a hoisting mechanism. Then, the multiple support beams are rotated using an adjustment mechanism so that they are all perpendicular to the side supports. The road panel is then installed on the multiple support beams to complete the installation of one truss section. By connecting multiple truss sections together, the steel truss bridge can be installed. This increases the speed at which construction workers can assemble the steel truss bridge on the construction site and improves the installation efficiency of the steel truss bridge on the construction site.

[0033] 2. By fixing the adjusting rod to the connecting block, when installing two adjacent side support sections, the connecting block can be pushed to slide a certain distance simultaneously as the side support on the next truss section is inserted into the connecting block of the previous side support section. This causes the connecting block to move the adjusting rod, thereby achieving synchronous rotation of multiple support beams. While connecting two adjacent side support sections, the support beam on the first side support section can also be opened simultaneously, further improving the installation efficiency of the steel truss bridge on the construction site.

[0034] 3. By setting a magnet in one of the snap-fit ​​slots and sliding a snap-fit ​​strip in the other snap-fit ​​slot, when both support beams in the same group rotate to the vertical side support position, the magnet drives the snap-fit ​​strip to move under the attraction of the magnet, so that the snap-fit ​​strip snaps between the two snap-fit ​​slots, thereby realizing the connection of the two support beams and ensuring the support strength of the support beams to the road panel. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application;

[0036] Figure 2 This is a schematic diagram of the side support frame in an embodiment of this application;

[0037] Figure 3 This is a schematic diagram of the adjustment mechanism in the embodiments of this application;

[0038] Figure 4 This is a schematic diagram of the connecting block in an embodiment of this application;

[0039] Figure 5This is a schematic cross-sectional view of the supporting beam in an embodiment of this application;

[0040] Figure 6 This is a schematic diagram of the structure of the road panel in the embodiments of this application;

[0041] Figure 7 This is a schematic diagram of the top support rod in an embodiment of this application;

[0042] Figure 8 This is a schematic diagram of the fastening mechanism in the embodiments of this application;

[0043] Figure 9 This is a schematic diagram of the locking block in an embodiment of this application.

[0044] Reference numerals: 100, Truss; 200, Side support; 210, Locking plate; 220, Locking groove; 230, Locking element; 231, Locking block; 232, Third spring; 300, Support beam; 310, Hinge rod; 320, Connecting mechanism; 321, Magnet; 322, Snap-fit ​​groove; 323, Snap-fit ​​strip; 324, First slot; 325, Second slot; 326, Insert block; 327, Second spring; 400, Adjustment mechanism; 410 420. Adjusting rod; 430. Rack; 440. Gear; 500. First spring; 510. Connecting block; 600. Road panel; 700. Top support rod; 710. Screw; 720. Nut; 800. Fastening mechanism; 810. Drive assembly; 811. Threaded rod; 812. Sliding rod; 820. Locking element; 821. Locking block; 822. Drive rod; 823. Clamping block; 824. Clamping groove; 830. Grouting hole. Detailed Implementation

[0045] The following is in conjunction with the appendix Figure 1-9 This application will be described in further detail.

[0046] This application discloses a segmented steel truss bridge.

[0047] Reference Figure 1 and Figure 2A segmented steel truss bridge includes multiple truss sections 100. Each truss section 100 includes two side supports 200 and a road panel 600. The two side supports 200 are arranged opposite to each other. Each side support 200 has multiple support beams 300 hinged to it. Each support beam 300 is located near the bottom of the side support 200. The multiple support beams 300 on the same side support 200 are spaced apart along the length of the side support 200. Each side support 200 is equipped with an adjustment mechanism 400, which drives the support beams 300 on the side support 200 to rotate. Each side support 200 has a connecting block 500 installed at one end and a connecting hole 510 at the other end, which is adapted to the connecting block 500. When constructing a steel truss bridge, first, place the two side supports 200 of one truss section 100 opposite each other, both in a vertical position. Then, insert the connecting block 500 on the side support 200 into the connecting hole 510 on the side support 200 of the other truss section 100 located on the same side. Then, start the adjustment mechanism 400, which drives multiple support beams 300 located on the same side support 200 to rotate, connecting the two corresponding support beams 300 on the two opposite side supports 200. Then, install the road panel 600 on the multiple support beams 300, thus completing the installation and construction of one truss section 100. This increases the speed at which construction workers can assemble the steel truss bridge on the construction site, thereby improving the efficiency of steel truss bridge construction.

[0048] Reference Figure 2 , Figure 3 and Figure 4Each supporting beam 300 is hinged to its corresponding side support 200 via a hinge rod 310. The hinge rod 310 is fixedly connected to the supporting beam 300 and rotatably connected to the side support 200. The adjustment mechanism 400 includes an adjustment rod 410, which is parallel to the length direction of the side support 200 and slidably connected to the side support 200. Multiple racks 420 are fixedly connected to the adjustment rod 410, and all racks 420 are parallel to the length direction of the adjustment rod 410. Each hinge rod 310 is coaxially fixedly connected to a gear 430, and the multiple gears 430 are arranged one-to-one with the multiple racks 420, with the gears 430 meshing with their corresponding racks 420. When erecting a steel truss bridge, after setting the two side supports 200 in the predetermined installation position, external equipment is used to push the adjusting rod 410 to slide. The sliding of the adjusting rod 410 drives multiple racks 420 to move, which in turn drives multiple gears 430 to rotate. The rotation of the gears 430 drives the racks 420 to rotate, thereby causing the supporting beam 300 to rotate 90 degrees and be in a state perpendicular to the side supports 200. Then, the supporting beams 300 located in the same position on the two side supports 200 are connected together, and the road panel 600 is installed on the multiple supporting beams 300, thus realizing the initial installation of a section of truss 100.

[0049] Reference Figure 2 , Figure 3 and Figure 4To further improve the ease of splicing the steel truss bridge, the connecting block 500 is slidably connected to its corresponding side support 200. The sliding direction of the connecting block 500 is parallel to the length direction of the side support 200. The connecting block 500 is fixedly connected to the adjusting rod 410 on its corresponding side support 200. The maximum sliding distance of the connecting block 500 is less than the length of the connecting block 500. A first spring 440 is installed between the connecting block 500 and the side support 200. One end of the first spring 440 is fixedly connected to the connecting block 500, and the other end of the first spring 440 is fixedly connected to the side support 200. During the transport of the side support frame 200, the first spring 440 pushes the connecting block 500 to the fully extended state. At this time, multiple supporting beams 300 are parallel to the length of the side support frame 200 under the action of the connecting block 500, so that the supporting beams 300 are in a retracted state, which facilitates the transport of the supporting beams 300. When erecting the steel truss bridge, after the two side supports 200 in one section of the truss 100 are installed, the side support frame 200 in the next section of the truss 100 is slid in. When the 00 movement connects the two truss sections 100, the next side support 200 can be engaged with the connecting block 500 on the corresponding previous side support 200. At the same time, the next side support 200 can push the connecting block 500 to move. Then, the two side support sections 200 can be reinforced. While connecting the two adjacent side support sections 200, the supporting beam 300 on the first side support section 200 can also be opened simultaneously, further improving the installation efficiency of the steel truss bridge on the construction site.

[0050] Reference Figure 2 and Figure 5 Two supporting beams 300 on two side supports 200 in the same truss 100 section are referred to as a group. A connecting mechanism 320 is installed between the two supporting beams 300 in the same group. The two supporting beams 300 in the same group are fixedly connected together by the connecting mechanism 320.

[0051] The connecting mechanism 320 includes a magnet 321 and a snap-fit ​​strip 323. The two supporting beams 300 in the same group are provided with snap-fit ​​grooves 322 at their close ends. The magnet 321 is fixedly connected to one of the supporting beams 300 and is located in the snap-fit ​​groove 322 on the supporting beam 300. The snap-fit ​​strip 323 is slidably connected to the snap-fit ​​groove 322 on the other supporting beam 300. The snap-fit ​​strip 323 slides along the length of the supporting beam 300. Both snap-fit ​​grooves 322 are adapted to the snap-fit ​​strip 323. A second spring 327 is fixedly connected to the end of the snap-fit ​​strip 323 away from the magnet 321. The end of the second spring 327 away from the snap-fit ​​strip 323 is fixedly connected to the support beam 300 that is slidably connected to the snap-fit ​​strip 323. The second spring 327 pulls the snap-fit ​​strip 323 to retract into the snap-fit ​​groove 322. The pulling force of the second spring 327 on the snap-fit ​​strip 323 is less than the attraction force of the magnet 321 on the snap-fit ​​strip 323. After the two side supports 200 are installed in the predetermined positions, when the two support beams 300 in the same group are rotated to the position perpendicular to the side supports 200, the magnet 321 fixed on one of the support beams 300 will attract and pull the snap-fit ​​strip 323 on the other support beam 300 towards the magnet 321, thereby snapping the snap-fit ​​strip 323 between the two snap-fit ​​slots 322, thus connecting the two support beams 300 in the same group together. Then the road panel 600 can be laid on the support beams 300 to ensure the support strength of the road panel 600.

[0052] Reference Figure 5 and Figure 6To facilitate positioning during the installation of the road panel 600, each supporting beam 300 is provided with a first slot 324, and the snap-fit ​​strip 323 is provided with two second slots 325. The two second slots 325 are configured one-to-one with the first slots 324 on the two supporting beams 300 in the same group. When the snap-fit ​​strip 323 is snapped between the two supporting beams 300 under the action of the magnet 321, the second slot 325 is exactly aligned with its corresponding first slot 324. Multiple sets of inserts 326 are fixedly connected to the bottom of the road panel 600. The multiple sets of inserts 326 are configured one-to-one with the multiple sets of supporting beams 300. Each set of inserts 326 includes two inserts 326, and the two inserts 326 are configured one-to-one with the two first slots 324. The inserts 326 are adapted to their corresponding first slots 324 and second slots 325. When installing the road panel 600, insert the two plugs 326 on the road panel 600 into their corresponding two first slots 324, and then insert them into the two second slots 325 respectively, thereby positioning the road panel 600 and facilitating its installation. Then, use high-strength bolts to fix the road panel 600 to the support beam 300. At the same time, after inserting the plugs 326 into the second slots 325, the plugs 326 can also lock the snap-fit ​​strip 323, thereby fixing the snap-fit ​​strip 323 and ensuring the connection stability of the two support beams 300 located in the same group.

[0053] Reference Figure 1 , Figure 2 and Figure 7 To ensure the stability of the connection between two adjacent side support frames 200, a locking plate 210 is fixedly connected to each side support frame 200. The locking plate 210 has a locking groove 220 and is located near the end of the side support frame 200 where the connection hole 510 is opened. A locking element 230 is installed on the end of each side support plate away from the locking plate 210 to which it is fixedly connected.

[0054] The locking component 230 includes a locking block 231 slidably connected to the side support 200. The locking block 231 is adapted to a locking groove 220 formed on the locking plate 210. A third spring 232 is installed between the locking block 231 and the side support 200. One end of the third spring 232 is fixedly connected to the locking block 231, and the other end of the third spring 232 is fixedly connected to the side support 200. The third spring 232 applies an outward sliding force to the locking block 231. The end of the locking block 231 away from the side support 200 is a slope, which faces the side close to the connecting block 500 installed on the side support 200. When the two side support frames 200 are brought together, as the next side support frame 200 slides towards the next side support frame 200, the locking plate 210 on the side support frame 200 also slides, so that one end of the locking plate 210 first contacts the inclined surface of the locking block 231 on the other side support frame 200, and then the side support frame 200 to be installed continues to slide, so that the locking plate 210 pushes the locking block 231 to retract into the side support frame 200. When the locking groove 220 on the locking plate 210 is aligned with the locking block 231, the two side support frames 200 are pressed together. At this time, the locking block 231 is pushed into the locking groove 220 by the third spring 232, realizing the initial connection of the two side support frames 200 and ensuring the stability of the subsequent reinforcement installation of the side support frames 200.

[0055] Reference Figure 7 , Figure 8 and Figure 9 Multiple top support rods 700 are rotatably connected to one of the side support frames 200 in the same truss 100 section. All the top support rods 700 are parallel to the ground. A fastening mechanism 800 is installed on the other side support frame 200. The fastening mechanism 800 is used to fasten the multiple top support rods 700 between the two side support frames 200.

[0056] The fastening mechanism 800 includes a drive assembly 810 and multiple locking elements 820. The drive assembly 810 includes a threaded rod 811 threadedly connected to the side support frame 200. The axis of the threaded rod 811 is parallel to the axis of the side support frame 200. A sliding rod 812 is installed at one end of the threaded rod 811 inserted into the side support frame 200. The threaded rod 811 and the sliding rod 812 are rotatably connected, and the axis of the threaded rod 811 is parallel to the axis of the sliding rod 812. The sliding rod 812 is slidably connected within the side support frame 200 and slides along its own length. Multiple locking elements 820 are installed on the sliding rod 812, and each locking element 820 corresponds to one of the multiple top support rods 700. The locking elements 820 are used to lock their corresponding top support rods 700.

[0057] Reference Figure 8 and Figure 9Each locking component 820 includes a locking block 821 passing through the side support frame 200. The locking block 821 is slidably connected to the side support frame 200 and slides vertically. A drive rod 822 is hinged to the lower end of the locking block 821. The hinge axis of the drive rod 822 and the locking block 821 is parallel to the ground and perpendicular to the length direction of the sliding rod 812. The end of the drive rod 822 away from the locking block 821 is hinged to the sliding rod 812. The hinge axis of the drive rod 822 and the sliding rod 812 is parallel to the hinge axis of the drive rod 822 and the locking block 821. A clamping block 823 is fixedly connected to the locking block 821. Each top support rod 700 has a clamping groove 824, which is adapted to the clamping block 823 on its corresponding locking block 821. The clamping block 823 can be engaged into its corresponding clamping groove 824. During the assembly of the steel truss beam 100, after the two side supports 200 are installed, multiple top support rods 700 are rotated to position the top support rods 700 between the two side supports 200. Then, the threaded rod 811 is rotated to push the sliding rod 812 to slide. The sliding rod 812 moves multiple drive rods 822, causing the sliding rod 812 to drag the locking block 821 connected to it downward. Then, the locking block 823 on the locking block 821 is inserted into the locking groove 322 on the top support rod 700, thereby realizing the synchronous locking of multiple top support rods 700 and improving the installation efficiency of the top support rods 700.

[0058] Reference Figure 8 and Figure 9 The side support frame 200 for mounting the drive rod 822 is provided with multiple grouting holes 830, all of which are connected to the cavity inside the side support frame 200 for housing the drive rod 822. After the top support rod 700 is locked, the construction personnel inject concrete grout into the interior of the side support frame 200 through the multiple grouting holes 830 to fill the interior of the side support frame 200. After the concrete grout has solidified, the drive rod 822 can be cast into the interior of the top support rod 700, ensuring the stability of the locking of the top support rod 700.

[0059] Reference Figure 7 Each top support rod 700 is rotatably connected to the side support frame 200 via a screw 710. The screw 710 is fixedly connected to the side support frame 200 and is vertically positioned. The top support rod 700 is sleeved on the outside of the screw 710, and the top support rod 700 and screw 710 are rotatably connected. A nut 720 is threaded onto the screw 710. After rotating the top support rod 700 to install it between the two side support frames 200, the nut 720 is tightened to lock the rotating end of the top support rod 700, further improving the stability of the top support rod 700 after installation.

[0060] This application also discloses a construction method for a segmented steel truss bridge, including the following steps:

[0061] S1: Truss 100 prefabrication, the various structural components of truss 100 are prefabricated in the factory;

[0062] S2: Structural component transfer, which involves transporting the prefabricated structural components of truss 100 from the factory to the construction site;

[0063] S3: Side support frame 200 installation: The side support frame 200 is hoisted to the predetermined installation position using hoisting equipment and then supported.

[0064] S4: The top support rod 700 and the road panel 600 are installed. The construction workers rotate the top support rod 700 to fasten it between the two side support frames 200. Then, the next section of the truss 100 is hoisted and the side support frame 200 in the next section of the truss 100 is pushed to connect with the previous section of the side support frame 200, so that the multiple support beams 300 are opened. Then the road panel 600 is installed, and then the truss 100 is installed section by section.

[0065] S5: Truss 100 is stable, and high-strength bolts are installed between two adjacent side supports 200 for reinforcement;

[0066] S6: Bridge towing, using towing equipment to tow the installed steel truss bridge to the bridge pier, and then fixing the steel truss bridge to the bridge pier.

[0067] The implementation principle of a segmented steel truss bridge according to an embodiment of this application is as follows: By hinged multiple supporting beams 300 on the side support frame 200 and rotatably connected multiple top support rods 700, before the bridge construction, the construction personnel first prefabricate the structural components such as the side support frame 200 in the factory, then transport each structural component to the construction site, and then use a hoisting mechanism to hoist two side support frames 200 to the predetermined installation position. Then, the top support rods 700 are installed between the two side support frames 200, and then the adjusting mechanism 400 drives the multiple supporting beams 300 to rotate, so that the multiple supporting beams 300 are all perpendicular to the side support frame 200. Then, the road panel 600 is installed on the multiple supporting beams 300, thus completing the installation of one section of truss 100. Then, the multiple sections of truss 100 are connected together to realize the installation of the steel truss bridge, which improves the speed of splicing the steel truss bridge on the construction site and improves the installation efficiency of the steel truss bridge on the construction site.

[0068] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A segmented steel truss bridge, characterized by: The utility model provides a kind of multi-section truss (100), each section of the truss (100) includes pavement slab (600) and two side support frames (200), one side of each of the side support frame (200) is hinged with multiple support cross beams (300), multiple support cross beams (300) connected on the same side support frame (200) are spaced along the length direction of the side support frame (200), adjusting mechanism (400) is provided on each side support frame (200), multiple support cross beams (300) located on the same side support frame (200) are connected with the adjusting mechanism (400) corresponding to itself, and the adjusting mechanism (400) is used to drive multiple support cross beams (300) to rotate, and the pavement slab (600) is connected on multiple support cross beams (300). The adjusting mechanism (400) includes adjusting rod (410), multiple gears (430) and multiple racks (420), the adjusting rod (410) is slidably connected on the side support frame (200), multiple gears (430) are provided in one-to-one correspondence with multiple support cross beams (300) connected on the same side support frame (200), the gear (430) is fixedly connected with the support cross beam (300) corresponding to itself, the axis of the gear (430) is collinear with the hinge axis of the support cross beam (300) corresponding to itself, multiple racks (420) are fixedly connected on the adjusting rod (410), multiple gears (430) are provided in one-to-one correspondence with multiple racks (420), and the gear (430) is engagedly connected with the rack (420) corresponding to itself. Two support cross beams (300) located at the same position in the length direction of two side support frames (200) are recorded as a group, the two support cross beams (300) in the same group are provided with clamping grooves (322) at one end close to each other, one of the clamping grooves (322) is fixedly connected with a magnet (321), and the other clamping groove (322) is slidably connected with a clamping strip (323), when the two support cross beams (300) are aligned, the magnet (321) attracts the clamping strip (323) to slide between the two clamping grooves (322). The pavement slab (600) is fixedly connected with multiple groups of insertion blocks (326), multiple groups of the insertion blocks (326) are provided in one-to-one correspondence with multiple groups of the support cross beams (300), each support cross beam (300) is provided with a first insertion groove (324), each group of the insertion blocks (326) includes two insertion blocks (326), the two insertion blocks (326) are provided in one-to-one correspondence with two first insertion grooves (324), and the clamping strip (323) is provided with two second insertion grooves (325), and the two second insertion grooves (325) are provided in one-to-one correspondence with the two first insertion grooves (324).

2. A segmented steel truss bridge according to claim 1, wherein: One end of each side support frame (200) in the length direction is provided with a connecting hole (510), and the other end of each side support frame (200) in the length direction is provided with a connecting block (500).

3. A segmented steel truss bridge according to claim 2, wherein: The connecting block (500) is slidingly connected to the side support frame (200), the connecting block (500) slides along the length direction of the side support frame (200), the sliding distance of the connecting block (500) is less than the length of the connecting block (500), and the connecting block (500) is fixedly connected with the adjusting rod (410).

4. The segmented steel truss bridge of claim 1, wherein: One end of each side support frame (200) is fixedly connected with a locking plate (210), the locking plate (210) is provided with a locking groove (220), and the other end of the side support frame (200) away from the locking plate (210) is provided with a locking piece (230) for clamping in the locking groove (220).

5. The segmented steel truss bridge of claim 1, wherein: A plurality of bracing rods (700) are rotatably connected to one of the side support frames (200) in the same section of the truss (100), and a fastening mechanism (800) is arranged on the other side support frame (200) in the same section of the truss (100), and the fastening mechanism (800) is used for synchronously locking a plurality of bracing rods (700) between the two side support frames (200).

6. A construction method of the sectional steel truss bridge according to claim 5, comprising the following steps: S1: truss (100) prefabrication, prefabricating each structural member in the truss (100) in a factory; S2: structural member transfer, transporting each structural member of the truss (100) prefabricated in the factory to a construction site; S3: side support frame (200) installation, hoisting the side support frame (200) to a predetermined installation position by hoisting equipment, and supporting; S4: bracing rod (700) and pavement slab (600) installation, the construction personnel rotate the bracing rod (700) to fasten the bracing rod (700) between the two side support frames (200), then hoist the next section of the truss (100), push the side support frame (200) in the next section of the truss (100) to abut against the previous section of the side support frame (200), make the plurality of bracing beams (300) open, then install the pavement slab (600), and then install the truss (100) section by section; S5: truss (100) stabilization, installing high-strength bolts between the adjacent two side support frames (200) for reinforcement; S6: bridge dragging, dragging the installed steel truss bridge to the pier by using a dragging device, and fixing the steel truss bridge on the pier.

Images