Fabricated H-shaped steel trestle

Abstract

The utility model discloses an assembly type H-shaped steel trestle, relates to the field of landscape footpaths, and aims to solve the problem that a limiting anti-seismic structure of an existing pedestrian trestle is inconvenient to install, a bent cap and a cross beam are connected through limiting bolts, a rubber support is arranged between the bent cap and a longitudinal beam, and after the longitudinal beam is connected with the cross beam, a gap is reserved between the cross beam and the bent cap. The groove holes are formed in the positions, connected with the limiting bolts, of the cross beam and serve as sliding grooves of the limiting bolts, longitudinal displacement space is provided between the cross beam and the cover beam, the restraining effect is provided, the installation difficulty is lowered, the shock resistance is improved, installation is easy and convenient, and the structure is light.

Description

Technical Field

[0001] The utility model relates to the field of landscape walkways, and particularly relates to an assembled H-shaped steel trestle bridge. Background Art

[0002] The bridge limit device is a key structure for bridge seismic resistance, mainly used to prevent large relative displacement between the upper structure and the lower structure during an earthquake, resulting in the falling of the beam and causing traffic interruption. Therefore, the limit device is an essential structure in the bridge structure.

[0003] The limit devices used in existing bridge structures are mainly divided into the following categories: block type structure, tenon type structure, cable type structure, energy dissipation type anti-falling beam device, etc. However, the above limit devices are more common in municipal or highway bridges. For the scenic pedestrian trestle bridge, the span of the trestle bridge is not large, the sizes of the upper and lower structural components are small, and the common limit devices are not applicable to this type of bridge. On the one hand, the components of the limit device are large in size and difficult to install on the pedestrian trestle bridge; on the other hand, the large-size limit device will also affect the overall landscape effect. Content of the Utility Model

[0004] The purpose of the utility model is to address the defects existing in the prior art and provide an assembled H-shaped steel trestle bridge. The capping beam and the cross beam are connected by limit bolts, a rubber bearing is arranged between the capping beam and the longitudinal beam. After the longitudinal beam is connected to the cross beam, a gap is left between the cross beam and the capping beam. A slot is opened at the position where the cross beam is connected to the limit bolt. The slot serves as a sliding groove for the limit bolt, providing a longitudinal displacement space between the cross beam and the capping beam and providing a constraint effect, improving the seismic resistance, and being simple to install and light in structure.

[0005] To achieve the above purpose, the following technical solutions are adopted:

[0006] An assembled H-shaped steel trestle bridge, comprising:

[0007] A capping beam, which is an H-shaped steel, and limit holes are opened on the upper flange plate;

[0008] Longitudinal beams, the two ends of which are respectively lapped on different capping beams, and rubber bearings for supporting the longitudinal beams are placed on the top surfaces of the capping beams;

[0009] A cross beam, which is an H-shaped steel, is located on the side of the longitudinal beam axis and is connected to the longitudinal beam. The cross beam is located above the capping beam and there is a gap between the cross beam and the capping beam. An oblong hole is opened on the lower flange plate of the cross beam, and the long axis direction of the slot is parallel to the longitudinal beam axis. The limit bolt passes through the limit hole and the slot; the limit bolt forms a sliding fit with the slot.

[0010] Furthermore, limit holes are respectively opened on the upper flange plates on both sides of the web of the capping beam, and slots are respectively opened on the lower flange plates on both sides of the web of the cross beam. The slots and the limit holes are arranged in one-to-one correspondence and cooperate with the limit bolts together.

[0011] Further, the cross beam and the capping beam are distributed in parallel.

[0012] Further, a connection plate perpendicular to the web of the longitudinal beam is connected to the web of the longitudinal beam, and the end of the cross beam is connected to the connection plate through a fixing plate so that the cross beam is connected to the longitudinal beam.

[0013] Further, through holes are provided on the fixing plate, and fasteners are fitted to the through holes. One end of the fixing plate is fixed to the web of the cross beam through the fasteners fitted to the through holes, and the other end is fixed to the connection plate of the longitudinal beam through the fasteners fitted to the through holes.

[0014] Further, fixing plates are respectively connected to both sides of the web of the cross beam, and the same connection plate is connected to the longitudinal beam through the fixing plates on both sides thereof.

[0015] Further, cross beams are respectively connected to both sides of the axis of the longitudinal beam. A guardrail is connected to the cross beam on one side of the axis of the longitudinal beam. The guardrail is located at one end of the cross beam far from the longitudinal beam, and the guardrail extends vertically above the longitudinal beam.

[0016] Further, a gap is left between the longitudinal beam and the cross beam connected thereto, and the top surface of the longitudinal beam is flush with the top surface of the cross beam connected thereto.

[0017] Further, a plurality of capping beams are provided, and each capping beam is respectively fixed to the top of the corresponding pier column. A gap is left between the longitudinal beam and the cross beam connected by adjacent capping beams, serving as an expansion joint.

[0018] Further, plates are laid on the tops of the cross beam and the longitudinal beam to form a trestle road surface.

[0019] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0020] In view of the problem that the limit seismic structure of the current pedestrian trestle is inconvenient to install, the present utility model uses limit bolts to connect the capping beam and the cross beam, and a rubber bearing is arranged between the capping beam and the longitudinal beam. After the longitudinal beam is connected to the cross beam, a gap is left between the cross beam and the capping beam. A slot is opened at the position where the cross beam is connected to the limit bolt, and the slot serves as a sliding groove for the limit bolt, providing a longitudinal displacement space between the cross beam and the capping beam and providing a constraint effect, reducing the installation difficulty, improving the seismic resistance, being simple to install and having a light structure. Description of the Drawings

[0021] Figure 1 It is a schematic diagram of the prefabricated H-shaped steel trestle in the embodiment of the present utility model.

[0022] Figure 2 It is a schematic diagram of the distribution positions of the cross beam and the longitudinal beam in the embodiment of the present utility model.

[0023] Figure 3This is a schematic diagram of the connection between the capping beam and the cross beam in the embodiment of the utility model.

[0024] Label description (in the order of first appearance): 1. Guardrail, 2. Cross beam, 3. Longitudinal beam, 4. Fixed plate, 5. Connecting plate, 6. Fastener, 7. Rubber bearing, 8. Limit bolt, 9. Capping beam, 10. Slot hole. Detailed implementation manners

[0025] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application.

[0026] The current bridge limit structure is large in volume and is mostly applicable to large-volume bridges, but it is not applicable to small bridge structures such as pedestrian trestles in scenic areas. The large-volume limit device is inconvenient to install on the pedestrian trestle, and moreover, it will also affect the aesthetics of the entire pedestrian trestle. Based on this, this embodiment provides a prefabricated H-shaped steel trestle, which uses H-shaped steel to establish the main structure of the trestle, and establishes a seismic structure between the capping beam 9, the cross beam 2, and the longitudinal beam 3 to improve its seismic capacity.

[0027] As Figure 1 shown, a prefabricated H-shaped steel trestle mainly includes a capping beam 9, a cross beam 2, a longitudinal beam 3, and a rubber bearing 7. The capping beam 9, the cross beam 2, and the longitudinal beam 3 are all made of H-shaped steel. Limit holes are provided on the upper flange plate of the capping beam 9 to facilitate the establishment of connection limits with the cross beam 2; both ends of the longitudinal beam 3 are respectively lapped on different capping beams 9, and rubber bearings 7 for supporting the longitudinal beam 3 are placed on the top surface of the capping beam 9; the cross beam 2 is located on the side of the axis of the longitudinal beam 3 and is connected to the longitudinal beam 3. The cross beam 2 is located above the capping beam 9 and there is a gap between the cross beam 2 and the capping beam 9. A slot hole 10 is provided on the lower flange plate of the cross beam 2. The long axis direction of the slot hole 10 is parallel to the axis of the longitudinal beam 3. The limit bolt 8 passes through the limit hole and the slot hole 10 to constrain the vertical positions of the cross beam 2 and the capping beam 9; the limit bolt 8 forms a sliding fit with the slot hole 10.

[0028] The capping beam 9, the cross beam 2, and the longitudinal beam 3 are made of H-shaped steel, which can ensure the strength and stability of the trestle skeleton structure. Due to its good bending resistance and load-bearing capacity, it is suitable as the main load-bearing structure of the trestle. Its cross-sectional dimensions are determined according to the load-bearing requirements and span of the trestle to ensure sufficient strength and stiffness. The upper and lower flange plates of the H-shaped steel provide good bending resistance, and the web enhances the shear resistance.

[0029] Limit holes are provided on the upper flange plate for installing the limit bolt 8. The limit holes are accurately provided on the upper flange plate of the capping beam 9. The position and size of the limit holes need to match the limit bolt 8 to ensure the accuracy and stability of the connection. The number and layout of the limit holes are planned according to the number and position of the cross beam 2 to effectively constrain the cross beam 2.

[0030] The two ends of the longitudinal beam 3 are respectively overlapped on different cap beams 9, and the load is carried by the rubber bearings 7 on the top surface of the cap beam 9, which not only ensures the stability of the longitudinal beam 3, but also achieves a certain shock absorption effect through the rubber bearings 7. A special rubber bearing 7 is placed on the top surface of the cap beam 9 to bear the weight of the longitudinal beam 3. The rubber bearing 7 has good shock absorption and isolation performance, can absorb and disperse the vibration energy transmitted by the longitudinal beam 3, and improve the comfort and safety of the trestle. The size and hardness of the rubber bearing 7 are selected according to the design load and shock absorption requirements.

[0031] Among them, the rubber bearing 7 can be a natural rubber bearing 7, a chloroprene rubber bearing 7, a nitrile rubber bearing 7, a two-component rubber bearing 7, etc., which has high wear resistance and chemical resistance, large vertical bearing capacity and vertical stiffness, and allows a certain horizontal displacement to adapt to the deformation requirements of structures such as bridges.

[0032] like Figure 2 As shown, H-shaped steel is also used as the cross beam 2, which is located on the side of the axis of the longitudinal beam 3 and connected to the longitudinal beam 3 to ensure the stability and load-bearing capacity of the structure. Figure 3 As shown, there is a gap between the cross beam 2 and the cap beam 9 to allow the structure to have a certain amount of deformation space when subjected to stress, thereby improving the earthquake resistance. The slot 10 opened on the lower flange plate of the cross beam 2 has its long axis parallel to the axis of the longitudinal beam 3, realizing the longitudinal displacement space between the cross beam 2 and the cap beam 9.

[0033] The limiting bolt 8 passes through the limiting hole of the cap beam 9 and the slot hole 10 of the cross beam 2 to prevent the cross beam 2 from being displaced too much in the vertical direction and causing detachment. At the same time, due to the design of the slot hole 10, a sliding fit is formed between the limiting bolt 8 and the slot hole 10, allowing the cross beam 2 to have a certain displacement space in the horizontal direction (i.e., the axial direction of the longitudinal beam 3), thereby enhancing the flexibility and seismic resistance of the structure.

[0034] In this embodiment, Figure 1 As shown, the slotted hole 10 is a waist-shaped hole, which can provide longitudinal sliding constraint for the limiting bolt 8 and, at the same time, can achieve position constraint in the lateral direction.

[0035] The sliding fit design of the rubber support 7, the limit bolt 8 and the slot 10 effectively improves the seismic resistance of the trestle, so that the structure can have better adaptability and stability under the action of external forces such as earthquakes. With the assembly design, the components can be quickly installed through simple bolt connections, which greatly shortens the construction period and improves the construction efficiency. Through reasonable design, the structure can meet the functional requirements while minimizing the exposed parts, which is both beautiful and reduces maintenance costs.

[0036] For each technical solution in the above content, we conduct a detailed analysis to explore the specific means adopted, the engineering problems solved, and the results achieved.

[0037] Limiting holes are respectively provided on the upper flange plates on both sides of the web of the capping beam 9, and slot holes 10 are respectively provided on the lower flange plates on both sides of the web of the cross beam 2. The slot holes 10 and the limiting holes are arranged in one-to-one correspondence and cooperate with the limiting bolts 8 together. The limiting bolts 8 pass through the limiting holes and the slot holes 10 to realize the connection and limitation of the cross beam 2 and the capping beam 9.

[0038] Ensure the firm connection between the cross beam 2 and the capping beam 9 and prevent excessive displacement of the cross beam 2 in the vertical direction. Through the design of the slot holes 10, a certain displacement space is allowed for the cross beam 2 in the horizontal direction, improving the flexibility and seismic performance of the structure.

[0039] The cross beam 2 and the capping beam 9 are kept parallelly distributed to ensure the uniformity of the structure. Ensure the correct relative position relationship between the cross beam 2 and the capping beam 9 to avoid structural distortion or deformation.

[0040] As Figure 1 and Figure 2 shown, a connecting plate 5 perpendicular to the web is connected to the web of the longitudinal beam 3, and the end of the cross beam 2 is connected to the connecting plate 5 through a fixing plate 4 to realize the connection between the cross beam 2 and the longitudinal beam 3. The additional connecting plate 5 provides a connection structure between the cross beam 2 and the longitudinal beam 3, ensuring the firm and reliable connection between the two and improving the load-bearing capacity of the overall structure.

[0041] The fixing plate 4 is provided with through holes, and the through holes are fitted with fasteners 6. One end of the fixing plate 4 is fixed to the web of the cross beam 2 through the fasteners 6 cooperating with the through holes, and the other end is fixed to the connecting plate 5 of the longitudinal beam 3 through the fasteners 6 cooperating with the through holes. The fasteners 6 can be bolts, screws, etc., realizing the precise connection and fixation between the cross beam 2 and the longitudinal beam 3. The connection is more compact and reliable, reducing the risk of structural loosening and deformation, and using bolts as the fasteners 6 can realize assembled installation, improving the construction efficiency and connection quality.

[0042] Fixing plates 4 are respectively connected to both sides of the web of the cross beam 2, and the same connecting plate 5 is connected to the longitudinal beam 3 through the fixing plates 4 on both sides thereof. The connection points between the cross beam 2 and the longitudinal beam 3 are increased, improving the connection stability and load-bearing capacity.

[0043] Cross beams 2 are respectively connected to both sides of the axis of the longitudinal beam 3. A guardrail 1 is connected to the cross beam 2 on one side of the axis of the longitudinal beam 3. The guardrail 1 is located at the end of the cross beam 2 far from the longitudinal beam 3 and extends vertically above the longitudinal beam 3. As Figure 1 shown, the cross beam 2 to which the guardrail 1 is connected forms a cantilever structure relative to the longitudinal beam 3. The guardrail 1 can provide safety protection measures to prevent people or objects from falling from the edge of the trestle. The safety of the trestle is improved, ensuring the safety of personnel and equipment.

[0044] There is a gap between the longitudinal beam 3 and the cross beam 2 connected thereto, allowing the structure to undergo a certain amount of deformation under factors such as temperature changes and load effects, and reducing stress concentration inside the structure.

[0045] There are multiple capping beams 9, each capping beam 9 is respectively fixed on the top of the corresponding pier column, and there is a gap between the longitudinal beam 3 and the cross beam 2 connected by adjacent capping beams 9 as an expansion joint. The stable connection between the capping beam 9 and the pier column is realized, and the expansion space between the structures is provided to adapt to the deformation requirements under different conditions. It provides a moving space for the longitudinal sliding of the cross beam 2 during seismic action.

[0046] The top surface of the longitudinal beam 3 is flush with the top surface of the cross beam 2 connected thereto, and a plate is laid on the top of the cross beam 2 and the longitudinal beam 3 to form a trestle road surface. It provides a flat and stable passage surface, meets the passage requirements of personnel and equipment. It improves the practicability and passage capacity of the trestle. It enhances the aesthetics and overall effect of the trestle.

[0047] The specific embodiments of the utility model have been described in detail above, but they are only examples, and the utility model is not limited to the specific embodiments described above. For those skilled in the art, any equivalent modification or substitution of the utility model is also within the scope of the utility model. Therefore, equal transformation, modification, improvement, etc. made without departing from the spirit and principle of the utility model should be covered within the scope of the utility model.

Claims

1. An assembled H-shaped steel trestle, characterized in that, Including: The capping beam is an H-shaped steel, and limiting holes are opened on the upper flange plate; The longitudinal beam has its two ends respectively lapped on different capping beams, and rubber bearings for supporting the longitudinal beam are placed on the top surface of the capping beam; The cross beam is an H-shaped steel, located on the side of the axis of the longitudinal beam and connected to the longitudinal beam. The cross beam is located above the capping beam and there is a gap between the cross beam and the capping beam. A slot hole is opened on the lower flange plate of the cross beam, and the long axis direction of the slot hole is parallel to the axis of the longitudinal beam. The limiting bolt passes through the limiting hole and the slot hole; the limiting bolt forms a sliding fit with the slot hole.

2. The prefabricated H-shaped steel trestle according to claim 1, characterized in that Limiting holes are respectively opened on the upper flange plates on both sides of the web of the capping beam, and slot holes are respectively opened on the lower flange plates on both sides of the web of the cross beam. The slot holes and the limiting holes are arranged in one-to-one correspondence and cooperate with the limiting bolts together.

3. The prefabricated H-shaped steel trestle according to claim 1 or 2, characterized in that The cross beam and the capping beam are distributed in parallel.

4. The fabricated H-shaped steel trestle according to claim 1, characterized in that A connecting plate perpendicular to the web of the longitudinal beam is connected to the web of the longitudinal beam, and the end of the cross beam is connected to the connecting plate through a fixing plate so that the cross beam is connected to the longitudinal beam.

5. The prefabricated H-shaped steel trestle according to claim 4, wherein Through holes are provided on the fixing plate, and fasteners are fitted with the through holes. One end of the fixing plate is fixed to the web of the cross beam through the fasteners fitted with the through holes, and the other end is fixed to the connecting plate of the longitudinal beam through the fasteners fitted with the through holes.

6. The prefabricated H-shaped steel trestle according to claim 4 or 5, characterized in that Fixing plates are respectively connected to both sides of the web of the cross beam, and the same connecting plate is connected to the longitudinal beam through the fixing plates on both sides thereof.

7. The fabricated H-shaped steel trestle according to claim 1, wherein Cross beams are respectively connected to both sides of the axis of the longitudinal beam, and a guardrail is connected to the cross beam on one side of the axis of the longitudinal beam. The guardrail is located at the end of the cross beam far from the longitudinal beam, and the guardrail extends vertically above the longitudinal beam.

8. The fabricated H-shaped steel trestle according to claim 1 or 7, characterized in that, A gap is left between the longitudinal beam and the cross beam connected thereto, and the top surface of the longitudinal beam is flush with the top surface of the cross beam connected thereto.

9. The prefabricated H-shaped steel trestle according to claim 1, wherein There are multiple capping beams, each capping beam is respectively fixed to the top of the corresponding pier column, and a gap is left between the longitudinal beam and the cross beam connected by adjacent capping beams as an expansion joint.

10. The fabricated H-shaped steel trestle according to claim 1 or 9, characterized in that, Plates are laid on the tops of the cross beam and the longitudinal beam to form a trestle road surface.

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