An assembled steel trestle

Abstract

This invention discloses a prefabricated steel trestle bridge, belonging to the field of steel trestle bridges. It includes a steel trestle bridge and connecting sections, wherein the connecting sections connect the steel trestle bridge to a concrete trestle bridge. The steel trestle bridge comprises several trestle groups assembled from multiple pieces. Each trestle group includes several support columns. At least one support column is fixedly equipped with a first support component, and the remaining support columns are slidably equipped with second support components. The first support component includes a first mounting member slidably or fixedly mounted on the support column, and a first mounting seat slidably or fixedly mounted on the support column. This invention avoids lateral height misalignment by adding first and second support components to the support columns, wherein the height of the second support components is adjustable. The vertical height of the second support components is adjusted according to the vertical height of the first support components.

Description

Technical Field

[0001] This invention relates to the field of steel trestle bridges, and particularly to a prefabricated steel trestle bridge. Background Technology

[0002] Steel trestle bridges are temporary steel structure passageways that are assembled using modular components and can be quickly erected. They are indispensable temporary construction facilities in bridge, port, water conservancy, municipal, and water-related projects. In complex site conditions such as water areas, soft soil foundations, canyons, and deep foundation pits, steel trestle bridges can quickly form stable passageways for personnel, machinery operations, and material transportation, effectively solving problems such as limited construction sites, difficult traffic organization, and high risks associated with water operations.

[0003] During the installation of steel trestle bridges, errors in the flatness of the supporting beams during casting can easily lead to adjacent beam segments, panels, or structural sections not maintaining the same plane, resulting in significant height differences. Summary of the Invention

[0004] This invention provides a prefabricated steel trestle bridge, which can solve the problem in the prior art that adjacent beam segments, panels or structural segments cannot be kept on the same plane, thus forming obvious height differences and misalignments.

[0005] A prefabricated steel trestle bridge includes a steel trestle bridge and a connecting section, wherein the connecting section is used to connect the steel trestle bridge and a concrete trestle bridge. The steel trestle bridge includes several trestle bridge groups assembled together. Each trestle bridge group includes several support columns. At least one support column is fixedly provided with a first support component, and the remaining support columns are slidably provided with second support components. The first support component includes a first mounting member slidably or fixedly provided on the support column, and a first mounting seat slidably or fixedly provided on the support column. The first support assembly has at least one set of detachable adjusting rods slidably disposed on it, and a plurality of supporting blocks slidably disposed on the adjusting rods. The second support assembly includes a second mounting component slidably disposed on a support column, and a second mounting seat is fixedly disposed on the second mounting component.

[0006] The connecting section includes a connecting plate, which may be provided with a detachable transition plate.

[0007] Furthermore, the connecting section includes a connecting plate, the connecting plate having a cavity inside, a positioning post fixedly mounted on one side of the cavity, a positioning sleeve slidably mounted on the positioning post, a first mounting plate fixedly mounted on the outside of the positioning sleeve, rotating rods symmetrically mounted on the first mounting plate, a first connecting member rotatably mounted at the end of each of the two rotating rods, the two first connecting members slidably engaging with the other end of the cavity, and a mating plate fixedly mounted at the end of the positioning sleeve, the mating plate slidably mounted on the inner wall of the cavity of the connecting plate.

[0008] Furthermore, a transition plate can be detachably connected to the mating plate. The transition plate is used for rigid connection with the end of the concrete trestle bridge. When the transition plate is provided with several insert rods, there are several insertion holes at corresponding positions on the connecting plate. The insert rods and insertion holes cooperate to realize the rigid connection between the transition plate and the connecting plate. Sealing blocks are fixedly provided on both first connecting parts. The sealing blocks are used to seal the upper and lower ends of the chamber. First buffer strips are fixedly installed on the outer side of both sealing blocks. The two sealing blocks are fixed to the upper and lower ends of the connecting plate by first bolts.

[0009] Furthermore, a set of trestle groups has three sets of support columns. The outermost set of support columns is fixedly equipped with a first support component, and the other two sets of support columns are slidably equipped with second support components. The first support component is also equipped with a positioning component, which is used to make the first support component and several support components at the same height.

[0010] Furthermore, several of the support columns are fixedly mounted on the second mounting plate near their top ends. The first support assembly includes a first mounting member that surrounds the outside of the support column and is fixedly connected to the corresponding second mounting plate below it. The first support assembly also includes a first mounting seat fixedly mounted on the top end of the support column. The first mounting seat is L-shaped.

[0011] Furthermore, several sets of second support components have the same structure. The second support component includes a second mounting member, which surrounds the outside of the support column and is located above the second mounting plate and slidably connected to the support column. A support platform is also fixedly provided on the second mounting member, and a second mounting seat is fixedly provided at the top of the support platform. The second mounting seat is L-shaped, and the second mounting seat on the second support component located in the middle is I-shaped.

[0012] Furthermore, a splicing base plate is installed within the U-shaped area enclosed by several second support components and the first support component. Second buffer strips are installed on both sides of the splicing base plate. Several splicing support plates are installed on the splicing base plate between the two second buffer strips. Several ribs are provided inside the support plates. The splicing base plate includes a first splicing plate and a second splicing plate. A first splicing platform is provided on the first splicing plate, and a second splicing platform is provided on the second splicing plate. The first splicing plate and the second splicing plate are spliced ​​together through the first splicing platform and the second splicing platform to form a complete splicing base plate. Several positioning rods are fixedly provided on the second splicing platform, and several corresponding positioning holes are provided on the first splicing platform. The positioning rods and positioning holes cooperate to achieve complete splicing, so that the first splicing plate and the second splicing plate are aligned.

[0013] Furthermore, the number of adjusting rods is two sets, which are set on both sides of the first mounting base. The positioning component includes two second connecting parts, which are fixedly mounted on the support column. A threaded rod and a sliding rod are fixedly mounted on the first mounting component. A sliding part is threadedly fitted on the threaded rod, and the sliding part and the sliding rod are slidably fitted. Extension rods are fixedly mounted on both sides of the sliding part, and support plates are fixedly mounted at the ends of the extension rods at both ends. Two limiting rods are fixedly mounted on the support plates on both sides. Limiting grooves are provided on both second connecting parts, and the extension rods on both sides are respectively fitted with the two limiting grooves.

[0014] Furthermore, several support blocks are slidably provided on the adjusting rod, and the support blocks are locked with bolts. The structure of the support plate also includes a plate body, the upper half of which has a V-shaped area. The V-shaped opening is surrounded by a slope, and an array of steel grid groups are provided on the slope. A mesh is installed at the V-shaped opening of the plate body. Several sets of steel grid groups are provided on the slope, and there are gaps between the sets of steel grid groups. A drainage groove is provided at the tip of the V-shaped area.

[0015] Furthermore, the first support component on the first assembled trestle group is fixedly installed, while the first support components on other trestle groups are slidably installed. The first mounting base, the second connector, and the first mounting component are fixedly connected, while the first mounting component, the second connector, and the support column are slidably connected. The height of the first support component can be changed by adjusting the position of the first mounting component. The adjustment is achieved by sliding the adjustment rod. After the first support component is installed, pads need to be added to the top of the first mounting base and the support column.

[0016] Beneficial effects 1. The present invention adds a first support component and a second support component to the support column, wherein the height of the second support component is adjustable. The vertical height of several second support components is adjusted according to the vertical height of the first support component to avoid lateral height misalignment.

[0017] 2. The present invention also includes a positioning component, which includes at least one set of adjusting rods slidably disposed on the first set of support columns. As the adjusting rods move upward, they gradually come into contact with the two second mounting seats and apply an upward lifting force to lift the two second mounting seats upward until the adjusting rods are in contact with the lower surface of the first mounting seat, so that the two second mounting seats and the first mounting seat are at the same height, thereby realizing the assembly of the steel trestle. After the installation is completed, the adjusting rods can be reversed, and the several support blocks slidably disposed on the adjusting rods are reversed to face downward and locked with bolts, so as to provide better support for the second mounting seats and their mounting parts. The adjusting rods can also perform a support function in addition to performing the adjustment function, and have the characteristics of simple structure and strong functionality. Attached Figure Description

[0018] Figure 1This is a schematic diagram of the overall installation of the foundation pit of the present invention; Figure 2 This is a schematic diagram of the splicing of the steel trestle bridge and the concrete trestle bridge of the present invention; Figure 3 This is a side view of the steel trestle bridge and the concrete trestle bridge of the present invention; Figure 4 This is an enlarged schematic diagram of part A of the present invention; Figure 5 This is a schematic diagram of the trestle assembly structure of the present invention. Figure I ; Figure 6 This is a front view of the stacker assembly of the present invention; Figure 7 This is an enlarged schematic diagram of part B of the present invention; Figure 8 This is a schematic diagram of a portion of the trestle assembly of the present invention; Figure 9 This is an enlarged schematic diagram of part C of the present invention; Figure 10 This is a schematic diagram of the trestle assembly structure of the present invention. Figure II ; Figure 11 This is an enlarged schematic diagram of part D of the present invention; Figure 12 This is a schematic diagram of another overall structure of the support plate of the present invention; Figure 13 This is another cross-sectional view of the support plate of the present invention.

[0019] Explanation of reference numerals in the attached figures: 100. Foundation pit; 200. Steel trestle bridge; 300. Concrete trestle bridge; 400. Connecting section; 201. Support column; 202. First mounting component; 203. Second mounting plate; 204. Second mounting component; 205. Support platform; 206. Second mounting seat; 207. Splicing base plate; 208. Second buffer strip; 209. Support plate; 210. Rib; 211. Threaded rod; 212. Sliding component; 213. Second connecting component; 214. Limiting groove; 215. Extension rod; 216. Support plate; 217. Limiting rod; 218. Adjusting rod; 219. Second bolt; 220. Support block; 221, First mounting base; 222, Plate; 223, Steel grating assembly; 224, Drainage channel; 225, Slope; 226, Mesh grid; 20701, First splicing plate; 20702, Second splicing plate; 20703, Second splicing platform; 20704, First splicing platform; 20705, Positioning rod; 401, Connecting plate; 402, Positioning sleeve; 403, Mating plate; 404, Transition plate; 405, Positioning post; 406, First mounting plate; 407, Rotating rod; 408, First connecting piece; 409, Sealing block; 410, First buffer strip; 411, First bolt. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] like Figure 1 As shown, the prefabricated steel trestle bridge 200 of this invention, with its core advantages of modularity, quick assembly, high load-bearing capacity, reusability, and green low-carbon features, is widely used in transportation infrastructure, municipal engineering, water conservancy and waterway transportation, mining and port, emergency rescue, military and national defense, and other fields. It is the mainstream solution for temporary passages, work platforms, and construction access roads in various projects. In this embodiment, the steel trestle bridge 200 is built within the foundation pit 100 and connected to the concrete trestle bridge 300. Only after the steel trestle bridge 200 and the concrete trestle bridge 300 are connected can a complete, safe, and usable passage be formed. Figure 2 As shown, a connecting section 400 is provided between the steel trestle bridge 200 and the concrete trestle bridge 300. The connecting section 400 is used to smoothly connect the steel trestle bridge 200 and the concrete trestle bridge 300, so as to realize the transition between the steel trestle bridge 200 and the concrete trestle bridge 300.

[0022] like Figure 3 and Figure 4 As shown, the connecting section 400 includes a connecting plate 401. The two sides of the connecting plate 401 are fixedly connected to the steel trestle 200 and the concrete trestle 300, respectively. In actual use, the structure of the connecting section 400 is usually directly cast together with the concrete trestle 300. This makes it impossible to reuse the related structure of the connecting section 400. After the steel trestle is removed, the connecting end will always be connected to the concrete trestle 300 or be destructively removed. Therefore, this embodiment proposes a method in which the connecting section 400 is not completely destroyed and separated from the concrete trestle 300 after use, so as to realize the reuse of the connecting section 400 and save resources.

[0023] like Figure 4As shown, the connecting plate 401 has a cavity inside. A positioning post 405 is fixedly mounted on one side of the cavity. A positioning sleeve 402 is slidably mounted on the positioning post 405. A first mounting plate 406 is fixedly mounted outside the positioning sleeve 402. Rotating rods 407 are symmetrically mounted on the first mounting plate 406. A first connecting piece 408 is rotatably mounted at the end of each of the two rotating rods 407. Both first connecting pieces 408 are slidably engaged with the other end of the cavity. A mating plate 403 is fixedly mounted at the end of the positioning sleeve 402. The mating plate 403 is slidably mounted on the inner wall of the cavity of the connecting plate 401. 403 can be pushed outward relative to the connecting plate 401. When the mating plate 403 retracts, it engages with the groove on the connecting plate 401 to complete the splicing. The mating plate 403 can also be pushed out of the connecting plate 401 under the action of the positioning sleeve 402. A transition plate 404 can also be detachably connected to the mating plate 403. The transition plate 404 is used for rigid connection with the end of the concrete trestle bridge 300. When the transition plate 404 is provided with several insert rods, the corresponding positions on the connecting plate 401 are provided with several insertion holes. The insert rods and insertion holes cooperate to realize the rigid connection between the transition plate 404 and the connecting plate 401. The two first connecting parts 40 Both of the 8 are fixedly equipped with sealing blocks 409, which are used to seal the upper and lower ends of the chamber. First buffer strips 410 are fixedly installed on the outer sides of both sealing blocks 409. The two sealing blocks 409 are fixed to the upper and lower ends of the connecting plate 401 by first bolts 411. The sealing blocks 409 are also rigidly connected to the steel trestle 200. During use, the connecting plate 401 is mainly rigidly connected to the concrete trestle 300 through a transition plate 404. When it is necessary to remove the transition plate 404 from the concrete trestle 300, the first bolts 411 are loosened, and tools are used to remove the two sealing blocks 409. 09 is pried out, and the sealing block 409 drives the two first connecting parts 408 to slide in the internal cavity of the connecting plate 401. The rotating rod 407 drives the connecting plate 401 to slide, pushing the mating plate 403 and its transition plate 404 outward. The transition plate 404 and the connecting plate 401 are relatively displaced. Then the transition plate 404 is removed from the mating plate 403, thus realizing the separation of the connecting section 400 from the concrete trestle bridge 300 and the overall dismantling of the connecting section 400. It should be noted that the rigid connection between the connecting section 400 and the concrete trestle bridge 300 needs to be released before this.

[0024] During the installation of the steel trestle bridge 200, the varying depths of the steel pipe piles embedded in the ground can easily lead to adjacent beam segments, panels, or structural sections not maintaining the same plane, resulting in significant height differences. These misalignments cause stress concentration and localized impact loads, reducing the overall load-bearing capacity and service life. They can also cause vehicle bumps and jumps, leading to tire impacts, brake failure, and in severe cases, vehicle scraping and rollovers. Therefore, this embodiment proposes a prefabricated steel trestle bridge 200 that ensures the assembled joints are as flat as possible, avoiding the occurrence of height differences.

[0025] like Figure 3 As shown, the steel trestle bridge 200 comprises several trestle bridge groups, which are spliced ​​together to form a complete steel trestle bridge 200, such as... Figure 5 As shown, the trestle assembly includes several support columns 201. In this embodiment, there are three sets of support columns 201. A first support component is fixedly installed on the outermost set of support columns 201, and a second support component is slidably installed on the other two sets of support columns 201. A positioning component is also installed on the first support component. The positioning component is used to make the first support component and several support components at the same height.

[0026] like Figure 5 As shown, several support columns 201 are fixedly mounted on the second mounting plate 203 near their top positions. The first support assembly includes a first mounting member 202, which surrounds the support column 201 and is fixedly connected to the corresponding second mounting plate 203 below it. The first support assembly also includes a first mounting seat 221 fixedly mounted at the top of the support column 201. The first mounting seat 221 is L-shaped. Several sets of second support assemblies have the same structure. Taking one set as an example, specifically, the second support assembly includes a second mounting member 204, which surrounds the support column 201 and is located above the second mounting plate 203, slidably connected to the support column 201. The second mounting member 204 is also fixedly mounted on... A support platform 205 is fixedly provided, and a second mounting seat 206 is fixedly provided at the top of the support platform 205. The second mounting seat 206 is L-shaped. The second mounting seat 206 on the second support component in the middle position is straight. When in use, the support column 201 on which the first support component is installed is first fixed. It is necessary to ensure that the first support column 201 is installed vertically to avoid tilting and affecting the overall quality of the steel trestle bridge 200. The vertical height of several second support components is adjusted according to the vertical height of the first support component to avoid lateral height misalignment. After long-term use, the height of the support column 201 may deviate again due to settlement. At this time, the height of several second support components needs to be readjusted to repair the height misalignment.

[0027] like Figure 6 As shown, after several second support components are adjusted to the same height as the first support component, a splicing base plate 207 is installed in the U-shaped area enclosed by the second support components and the first support component. Second buffer strips 208 are installed on both sides of the splicing base plate 207. Several spliced ​​support plates 209 are installed on the splicing base plate 207 between the two second buffer strips 208. Several ribs 210 are provided within the support plates 209. Figure 7As shown, the splicing base plate 207 includes a first splicing plate 20701 and a second splicing plate 20702. The first splicing plate 20701 is provided with a first splicing platform 20704, and the second splicing plate 20702 is provided with a second splicing platform 20703. The first splicing plate 20701 and the second splicing plate 20702 are spliced ​​together through the first splicing platform 20704 and the second splicing platform 20703 to form a complete splicing base plate 207. Figure 8 and Figure 9 As shown, a number of positioning rods 20705 are fixedly provided on the second splicing platform 20703, and a number of corresponding positioning holes are provided on the first splicing platform 20704. The positioning rods 20705 cooperate with the positioning holes to achieve complete splicing, so that the first splicing plate 20701 and the second splicing plate 20702 are aligned, further avoiding the occurrence of misalignment.

[0028] In actual construction, after the first set of support columns 201 are fixed in advance, the two second support components need to be adjusted to the same height as the first support component. In some construction scenarios, the distance between several sets of support columns 201 is large, and it is cumbersome and dangerous to manually cross different support columns 201 to adjust the height of the second support components. Therefore, this implementation also proposes a positioning component to adjust the two second support components to the same height as the first support component.

[0029] like Figure 10 and Figure 11 As shown, the positioning component includes at least one set of adjusting rods 218 slidably disposed on the first set of support columns 201. In this embodiment, the number of adjusting rods 218 is two sets disposed on both sides of the first mounting base 221. Specifically, the positioning component includes two second connecting members 213, which are fixedly disposed on the support columns 201. A threaded rod 211 and a sliding rod (not marked in the figure) are fixedly disposed on the first mounting member 202. A sliding member 212 is threadedly engaged with the threaded rod 211, and the sliding member 212 is slidably engaged with the sliding rod. Both sides are fixed with extension rods 215, and the ends of the extension rods 215 are fixed with support plates 216. Two limiting rods 217 are fixed on the support plates 216 on both sides. Two second connecting parts 213 are provided with limiting grooves 214. The extension rods 215 on both sides respectively cooperate with the two limiting grooves 214. In use, rotating the threaded rod 211 causes the sliding part 212 to move its support plate 216 to the top. Then, the two adjusting rods 218 are inserted into the limiting rods 217 on both sides, so that the adjusting rods 218 are fixed on the limiting rods 217. Figure 5As shown, at this time, the adjusting rod 218 is simultaneously located below several second mounting seats 206 and the first mounting seat 221. At this time, the two second components are in an unadjusted state. After the adjusting rod 218 is installed, the sliding member 212 is moved upward by rotating the threaded rod 211. The adjusting rod 218 gradually contacts the two second mounting seats 206 and applies an upward lifting force to lift the two second mounting seats 206 upward until the adjusting rod 218 is in contact with the lower surface of the first mounting seat 221. At this time, the two second mounting seats 206 and the first mounting seat 221 are all located above the adjusting rod 218 and in contact with it, so that the two second mounting seats 206 and the first mounting seat 221 are at the same height and are fixedly connected by several second bolts 219. Finally, the splicing base plate 207, the second buffer strip 208 and the support plate 209 are installed to realize the assembly of the steel trestle bridge 200.

[0030] like Figure 5 As shown, after installation, due to the small supporting surface between the second mounting base 206 on the two second support components and the top of the support column 201, to prevent breakage after long-term use, the adjusting rod 218 can be reversed after installation. Several support blocks 220 are slidably mounted on the adjusting rod 218. With the support blocks 220 facing downwards, they will slide outwards under gravity but will not separate from the adjusting rod 218. This allows the support blocks 220 to adaptively adjust according to the distance between the second mounting base 206 and the top of the support column 201 on the two sets of second support components. Finally, bolts are used to lock the support blocks 220, effectively adding a reinforcing member to each side of the second mounting base 206 and the support column 201 to provide better support for the second mounting base 206 and its mounting components. This also allows the adjusting rod 218 to perform a supporting function in addition to its driving adjustment function, featuring a simple structure and strong functionality.

[0031] like Figure 6 As shown, the steel trestle 200 is constructed by assembling several trestle groups. The first support component on the first assembled trestle group needs to be fixed, while the first support components on other trestle groups can be slidably installed to facilitate longitudinal height adjustment of the steel trestle 200. When the first support component is slidably installed on the support column 201, as shown... Figure 11 As shown, the first mounting base 221, the second connector 213, and the first mounting component 202 are fixedly connected. The first mounting component 202 and the second connector 213 are slidably connected to the support column 201. The height of the first support component can be changed by adjusting the position of the first mounting component 202, so that the first support components of adjacent trestle groups are at the same height. The adjustment can also be achieved by sliding the adjustment rod 218. After the first support component is installed, pads need to be added to the top of the first mounting base 221 and the support column 201 to avoid stress concentration on the second connector 213.

[0032] Since water accumulation is prone to occur in the support plate 209 during use, this embodiment also proposes a support plate 209 structure that facilitates drainage, specifically as follows: Figure 12 and 13 As shown, the system includes a plate 222, the upper half of which has a V-shaped area. The V-shaped opening is surrounded by a slope 225. An array of steel grid groups 223 are arranged on the slope 225. A mesh 226 is installed at the V-shaped opening of the plate 222. Several sets of steel grid groups 223 are arranged on the slope 225, and there are gaps between the sets of steel grid groups 223. A drainage trough 224 is provided at the tip of the V-shaped area. When in use, rainwater falls onto the mesh 226 and then falls down through the mesh openings of the mesh 226 into the spaces between the steel grid groups 223. Finally, the rainwater collects along the slope 225 and flows into the drainage trough 224, where it is discharged through both ends, thus preventing a large amount of water from accumulating on the support plate 209. In this embodiment, the drainage trough 224 can have a certain slope to facilitate better drainage of rainwater.

[0033] In this implementation, the lower end of the support column 201 can be a metal lattice column, which is a prefabricated steel temporary support column. It is a non-solid column with a square or rectangular hollow lattice structure, composed of multiple deep columns and horizontal diagonal bracing, forming an overall "well" or truss-shaped cross section, balancing strength and lightweight. The column body is covered with evenly spaced vertical rectangular holes or hollow slots for weight reduction, installation of tie rods, adjustment of installation positioning, and also for easy observation and operation by construction personnel.

[0034] In the description of this invention, it should be understood that the terms "upper," "lower," "left," and "right," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or a specific orientational structure and operation. Therefore, they should not be construed as limitations on the invention. Furthermore, "first" and "second" are only for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "multiple" means two or more.

[0035] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0036] The foregoing has provided a detailed description of one embodiment of the present invention, but this description is merely a preferred embodiment and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the claims of this invention should still fall within the patent coverage of this invention.

Claims

1. A prefabricated steel trestle bridge, characterized in that, It includes a steel trestle bridge (200) and a connecting section (400), wherein the connecting section (400) is used to connect the steel trestle bridge (200) to the concrete trestle bridge; The steel trestle bridge (200) includes several trestle bridge groups spliced ​​together. Each trestle bridge group includes several support columns (201). At least one support column (201) is fixedly provided with a first support component, and the remaining several support columns (201) are slidably provided with a second support component. The first support component includes a first mounting member (202) slidably or fixedly provided on the support column (201), and a first mounting seat (221) slidably or fixedly provided on the support column (201). The first support assembly is slidably provided with at least one set of detachable adjusting rods (218), and a plurality of support blocks (220) are slidably provided on the adjusting rods (218). The second support assembly includes a second mounting member (204) slidably provided on the support column (201), and a second mounting seat (206) is fixedly provided on the second mounting member (204). The connecting section (400) includes a connecting plate (401), on which a detachable transition plate (404) may be provided.

2. The prefabricated steel trestle bridge as described in claim 1, characterized in that, The connecting section (400) includes a connecting plate (401), which has a cavity inside. A positioning post (405) is fixedly provided on one side of the cavity. A positioning sleeve (402) is slidably provided on the positioning post (405). A first mounting plate (406) is fixedly provided on the outside of the positioning sleeve (402). Rotating rods (407) are symmetrically provided on the first mounting plate (406). A first connecting piece (408) is rotatably provided at the end of each of the two rotating rods (407). The two first connecting pieces (408) are slidably engaged with the other end of the cavity. A mating plate (403) is fixedly provided at the end of the positioning sleeve (402). The mating plate (403) is slidably provided on the inner wall of the cavity of the connecting plate (401).

3. A prefabricated steel trestle bridge as described in claim 2, characterized in that, A transition plate (404) can also be detachably connected to the mating plate (403). The transition plate (404) is used to rigidly connect with the end of the concrete trestle bridge (300). When the transition plate (404) is provided with several insert rods, the corresponding position on the connecting plate (401) is provided with several insertion holes. The insert rods and insertion holes cooperate to realize the rigid connection between the transition plate (404) and the connecting plate (401). Both first connecting parts (408) are fixedly provided with sealing blocks (409). The sealing blocks (409) are used to seal the upper and lower ends of the chamber. The outer sides of the two sealing blocks (409) are fixedly installed with first buffer strips (410). The two sealing blocks (409) are fixed to the upper and lower ends of the connecting plate (401) by first bolts (411).

4. The prefabricated steel trestle bridge as described in claim 1, characterized in that, In a set of trestle groups, there are three sets of support columns (201). The outermost set of support columns (201) is fixedly equipped with a first support component, and the other two sets of support columns (201) are slidably equipped with second support components. The first support component is also equipped with a positioning component, which is used to make the first support component and several support components at the same height.

5. A prefabricated steel trestle bridge as described in claim 4, characterized in that, Several of the support columns (201) are fixedly mounted on the second mounting plate (203) near their top positions. The first support assembly includes a first mounting member (202), which surrounds the support column (201) and is fixedly connected to the second mounting plate (203) below it. The first support assembly also includes a first mounting seat (221) fixedly mounted on the top of the support column (201), which is L-shaped.

6. A prefabricated steel trestle bridge as described in claim 1, characterized in that, Several sets of second support components have the same structure. The second support component includes a second mounting component (204). The second mounting component (204) surrounds the outside of the support column (201) and is located above the second mounting plate (203) and slidably connected to the support column (201). A support platform (205) is also fixedly provided on the second mounting component (204). A second mounting seat (206) is fixedly provided at the top of the support platform (205). The second mounting seat (206) is L-shaped. The second mounting seat (206) on the second support component located in the middle position is straight.

7. A prefabricated steel trestle bridge as described in claim 1, characterized in that, A splicing base plate (207) is installed in the U-shaped area enclosed by several second support components and the first support component. Second buffer strips (208) are installed on both sides of the splicing base plate (207). Several splicing support plates (209) are installed on the splicing base plate (207) between the two second buffer strips (208). Several ribs (210) are provided in the support plates (209). The splicing base plate (207) includes a first splicing plate (20701) and a second splicing plate (20702). A first splicing platform (20704) is provided on the first splicing plate (20701), and a second splicing platform (20702) is provided on the second splicing plate (20702). 02) A second splicing platform (20703) is provided. The first splicing plate (20701) and the second splicing plate (20702) are spliced ​​together through the first splicing platform (20704) and the second splicing platform (20703) to form a complete splicing base plate (207). Several positioning rods (20705) are fixedly provided on the second splicing platform (20703). Several corresponding positioning holes are provided on the first splicing platform (20704). The positioning rods (20705) cooperate with the positioning holes to achieve complete splicing so that the first splicing plate (20701) and the second splicing plate (20702) are aligned.

8. A prefabricated steel trestle bridge as described in claim 1, characterized in that, The number of adjusting rods (218) is two sets, which are set on both sides of the first mounting base (221). The positioning component includes two second connecting parts (213). The two second connecting parts (213) are fixedly set on the support column (201). A threaded rod (211) and a sliding rod are fixedly set on the first mounting component (202). A sliding part (212) is threadedly fitted on the threaded rod (211). The sliding part (212) and the sliding rod slide together. Extension rods (215) are fixedly set on both sides of the sliding part (212). A support plate (216) is fixedly set at the end of the extension rods (215) at both ends. Two limiting rods (217) are fixedly set on the support plates (216) on both sides. Limiting grooves (214) are provided on both second connecting parts (213). The extension rods (215) on both sides cooperate with the two limiting grooves (214) respectively.

9. A prefabricated steel trestle bridge as described in claim 1, characterized in that, The adjusting rod (218) is provided with several support blocks (220), and the support blocks (220) are locked with bolts. The structure of the support plate (209) also includes a plate body (222). The upper half of the plate body (222) is provided with a V-shaped area. The V-shaped opening is surrounded by a ramp (225). The ramp (225) is provided with an array of steel grid groups (223). A mesh grid (226) is installed at the V-shaped opening of the plate body (222). A total of several steel grid groups (223) are provided on the ramp (225). There are gaps between the several steel grid groups (223). A drainage groove (224) is provided at the tip of the V-shaped area.

10. A prefabricated steel trestle bridge as described in claim 4, characterized in that, The first support component on the first trestle group is fixedly set, while the first support component on other trestle groups is slidably set. The first mounting base (221), the second connector (213), and the first mounting component (202) are fixedly connected. The first mounting component (202), the second connector (213), and the support column (201) are slidably connected. The height of the first support component is changed by adjusting the position of the first mounting component (202). The adjustment is achieved by sliding the adjustment rod (218). After the first support component is installed, pads need to be added to the top of the first mounting base (221) and the support column (201).

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