Assembly type anti-jumping axle platform transition arc-shaped steel butt strap structure
By using a prefabricated anti-slip bridge abutment transition arc steel slab structure, the problem of bridge approach slab settlement was solved, enabling rapid construction, adapting to settlement, reducing slab settlement, and improving road driving safety and structural stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-25
- Publication Date
- 2026-03-31
AI Technical Summary
In soft soil areas, the abutment area develops steps due to settlement, causing vehicles to sag at the bridge approach. Existing temporary paving measures cannot improve the foundation bearing capacity in the long term; instead, they exacerbate settlement, creating a vicious cycle.
The bridge abutment transition arc-shaped steel approach plate structure, which is prefabricated and includes an arc-shaped steel approach plate, a rotating shaft and a fixed steel ring, is adopted. It adapts to the settlement difference between the bridge abutment and the road through a rotatable connection, thereby reducing the phenomenon of vehicle bouncing.
Short construction time ensures smooth road access, reduces vehicle bouncing, adapts to roadbed settlement, avoids exacerbating settlement with additional paving, and improves driving safety and structural stability.
Smart Images
Figure CN224063256U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of bridge structure technology, and in particular to a prefabricated anti-jump bridge abutment transition arc-shaped steel approach plate structure. Background Technology
[0002] In areas with soft soil, where the soil layer can reach 50-60 meters thick, even after foundation treatment, bridge abutment areas often experience varying degrees of settlement due to various reasons. Since bridge foundations are generally pile foundations, settlement is minimal, leading to the formation of steps at the abutment and causing "bridge approach slab" (or "bridge approach bumps"). Once bridge approach slabs form, the impact coefficient of vehicle loads on the abutment area is high, exacerbating settlement. To temporarily alleviate the slab slab problem and reduce driving hazards, authorities often add paving to the affected area. However, this temporary paving only provides temporary relief; it doesn't improve the foundation's bearing capacity but instead increases the load, causing new settlement and creating a vicious cycle. Utility Model Content
[0003] The purpose of this utility model is to solve at least one of the technical problems existing in the prior art. To this end, this utility model proposes a prefabricated anti-slip bridge abutment transition arc-shaped steel approach plate structure, which can improve the phenomenon of bridge approach slip.
[0004] The prefabricated anti-jump bridge abutment transition arc-shaped steel approach plate structure according to an embodiment of the present utility model includes: an arc-shaped steel approach plate, which is in the shape of an arc sheet and is erected between the bridge abutment and the road. The arc-shaped steel approach plate includes a curved section, a first straight section is provided on the side of the curved section near the bridge abutment, the first straight section is connected to a rotatable steel ring, and a second straight section is provided on the side of the curved section near the road, the second straight section is erected on the road surface; a rotating shaft is located between the arc-shaped steel approach plate and the bridge abutment back wall, and multiple fixed steel rings and rotatable steel rings are alternately sleeved on the rotating shaft. The rotatable steel rings are welded to the arc-shaped steel approach plate, and pre-embedded steel bars are embedded in the bridge abutment back wall. Supporting angle steels are welded to the pre-embedded steel bars and are welded to the fixed steel rings.
[0005] The prefabricated anti-jump bridge abutment transition arc-shaped steel approach plate structure according to this utility model embodiment has at least the following beneficial effects: By using this prefabricated anti-jump bridge abutment transition arc-shaped steel approach plate structure, an arc-shaped steel approach plate is erected between the bridge abutment and the road, resulting in short construction time, ensuring smooth road traffic, reducing vehicle bouncing, and improving road safety. The arc-shaped steel approach plate can rotate, and since the road end is a variable-height section, it can adapt to the continuously increasing settlement caused by the consolidation of the roadbed itself through rotation, and will not exacerbate the bridge abutment settlement due to overlay.
[0006] According to some embodiments of this utility model, the bottom surface of the second straight segment is provided with a contact surface, and the contact surface and the road surface are in surface contact.
[0007] According to some embodiments of this utility model, stiffening ribs are welded onto the first arc-shaped steel plate.
[0008] According to some embodiments of this utility model, multiple stiffening ribs are provided, and the multiple stiffening ribs are arranged along the width direction of the arc-shaped steel plate, with a spacing of 300mm between adjacent stiffening ribs.
[0009] According to some embodiments of this utility model, the cross-section of the stiffening rib is I-shaped.
[0010] According to some embodiments of the present invention, the thickness of the vertical web of the first stiffening rib is 16mm, the thickness of the bottom plate of the stiffening rib is 14mm, and the width of the bottom plate of the stiffening rib is 130mm.
[0011] According to some embodiments of this utility model, a steel anti-slip strip is provided on the top surface of the stiffening rib.
[0012] According to some embodiments of this utility model, the diameter of the first rotating shaft is 120mm, the outer diameter of the fixed steel ring is 150mm, the thickness of the fixed steel ring is 10mm, the length of each segment of the fixed steel ring is 130mm, the outer diameter of the rotatable steel ring is 150mm, the thickness of the rotatable steel ring is 10mm, and the length of each segment of the rotatable steel ring is 170mm.
[0013] According to some embodiments of this utility model, the first supporting angle steel is a 150mm×12mm angle steel, and the diameter of the pre-embedded reinforcing bar is 20mm.
[0014] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description
[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments:
[0016] Figure 1 This is a structural schematic diagram of the prefabricated anti-jump bridge abutment transition arc-shaped steel gusset plate according to an embodiment of this utility model;
[0017] Figure 2 yes Figure 2 Top view of the curved steel slab;
[0018] Figure 3 yes Figure 2 A magnified view of a section at point A in the middle;
[0019] Figure 4 This is a partial structural schematic diagram of the prefabricated anti-jump bridge abutment transition arc-shaped steel approach plate according to an embodiment of this utility model.
[0020] Figure label:
[0021] 100mm curved steel plate; 110mm stiffening rib; 120mm circular curve segment; 130mm first straight segment; 140mm second straight segment; 141mm contact surface; 200mm embedded steel bar; 300mm supporting angle steel; 400mm rotating shaft; 410mm fixed steel ring; 420mm rotatable steel ring;
[0022] Bridge abutment 1; Road 2. Detailed Implementation
[0023] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0024] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.
[0025] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.
[0026] refer to Figures 1 to 4 This invention describes the prefabricated anti-jump bridge abutment transition arc-shaped steel gusset structure according to an embodiment of the present invention.
[0027] like Figures 1 to 4 As shown, the prefabricated anti-jump bridge abutment transition arc-shaped steel approach plate structure according to an embodiment of the present utility model includes: an arc-shaped steel approach plate, the arc-shaped steel approach plate is in the shape of a circular arc sheet, the arc-shaped steel approach plate is erected between the bridge abutment and the road, the arc-shaped steel approach plate includes a circular curve segment, a first straight segment is provided on the side of the circular curve segment near the bridge abutment, the first straight segment is connected to a rotatable steel ring, a second straight segment is provided on the side of the circular curve segment near the road, the second straight segment is erected on the road surface;
[0028] The rotating shaft is located between the curved steel approach plate and the abutment back wall. Multiple fixed steel rings and rotatable steel rings are alternately fitted on the rotating shaft. The rotatable steel rings are welded to the curved steel approach plate. Pre-embedded steel bars are embedded in the abutment back wall. Supporting angle steels are welded to the pre-embedded steel bars. The supporting angle steels are welded to the fixed steel rings.
[0029] like Figures 1 to 3 As shown, the curved steel approach plate 100 structure is installed at the junction of bridge abutment 1 and road 2. One end of the curved steel approach plate 100 is connected to bridge abutment 1, and the other end is connected to road 2. The longitudinal shape of the steel approach plate is curved. One end is welded to a fixed ring to achieve rotation around the rotating shaft 400; the other end is at an unequal height and rests on road 2. The curved steel approach plate 100 rotates with the rotating shaft 400 to adapt to different height differences. The width of each steel approach plate is pre-welded to a width that facilitates installation, storage, and transportation. The rotating shaft 400 is the axis for the rotation of the curved steel approach plate 100. A fixed steel ring 410 and a rotatable steel ring 420 are fitted onto the rotating shaft 400. A certain gap is maintained between the rotating shaft 400 and the fixed steel ring 410 and the rotatable steel ring 420 to facilitate rotation. The connection between the supporting angle steel 300 and bridge abutment 1 is achieved by rebar anchoring. A certain length of the pre-embedded steel bar is retained on the outer side and welded to the steel plate.
[0030] This prefabricated anti-jump bridge abutment transition arc-shaped steel approach plate structure allows for the erection of an arc-shaped steel approach plate 100 between bridge abutment 1 and road 2. This construction method is quick, ensures smooth traffic flow on road 2, reduces vehicle bouncing, and improves traffic safety on road 2. The arc-shaped steel approach plate 100 is rotatable. Since the end of road 2 is a variable-height section, rotation can accommodate the increasing settlement caused by the consolidation of the roadbed, without exacerbating bridge abutment settlement due to overlay. The arc-shaped steel approach plate 100 is manufactured in modules, simplifying installation and recycling. If major repairs are needed in the bridge abutment area, the arc-shaped steel approach plate 100 can be dismantled and recycled.
[0031] The design and construction process of this prefabricated anti-jump abutment transition arc-shaped steel slab structure is as follows:
[0032] Step 1: Determine the span and height of the curved steel approach slab 100 based on the structural dimensions of abutment 1, lane width, vehicle load, and vehicle slab height. By comprehensively considering factors such as the structural dimensions of abutment 1, lane width, vehicle load, and vehicle slab height, the span and height of the curved steel approach slab 100 can be accurately determined to ensure that it matches the actual working conditions, thereby effectively improving the vehicle slab slab phenomenon at the bridge approach and enhancing driving comfort and safety.
[0033] Step 2: Calculate the implementation range of the curved steel slab 100 based on the width of road 2, divide the unit width of the curved steel slab 100 according to the implementation range, and prepare the curved steel slab 100; calculate the implementation range of the curved steel slab 100 based on the width of road 2, and divide the unit width to make the arrangement of the curved steel slab 100 more reasonable, fully cover the area that needs to be treated, and facilitate construction operation and quality control.
[0034] Step 3: Insert pre-embedded steel bars 200 into the back wall of bridge abutment 1 facing road 2, and then weld supporting angle steel 300 onto the steel bars; the insertion of pre-embedded steel bars 200 into the back wall of bridge abutment 1 facing road 2 and the welding of supporting angle steel 300 onto them provides a stable supporting foundation for the subsequent installation of the curved steel slab 100, and enhances the overall stability and load-bearing capacity of the structure.
[0035] Step 4: Alternately sleeve the fixed steel ring 410 and the rotatable steel ring 420 on the rotating shaft core 400; Alternately sleeve the fixed steel ring 410 and the rotatable steel ring 420 on the rotating shaft core to form a flexible rotating connection structure, which allows the arc-shaped steel approach plate 100 to adaptively adjust according to the settlement difference between the bridge abutment 1 and the road 2, effectively alleviating the vehicle bouncing phenomenon caused by settlement.
[0036] Step 5: Connect the fixing steel ring 410 and the supporting angle steel 300 by welding; the connection of fixing steel ring 410 and supporting angle steel 300 by welding has high strength and good reliability, and can withstand large loads and deformations, ensuring the stability and safety of the arc-shaped steel plate 100 during use.
[0037] Step 6: Weld the rotatable steel ring 420 to the arc-shaped steel approach plate 100, so that one end of the arc-shaped steel approach plate 100 is rotatably connected to the back wall of the abutment 1. Rotate the arc-shaped steel approach plate 100 along the rotation axis 400 so that the end of the arc-shaped steel approach plate 100 away from the abutment 1 is laid on the road surface. Welding the rotatable steel ring 420 to the arc-shaped steel approach plate 100, so that one end of the arc-shaped steel approach plate 100 is rotatably connected to the back wall of the abutment 1, and the other end is laid on the road surface, forms a movable connection structure that can adapt to uneven settlement between the abutment 1 and the road 2, reducing vehicle bouncing caused by settlement differences.
[0038] In step 2, before fabricating the curved steel slab 100, the strength of the curved steel slab 100 is calculated and verified. Performing strength calculation and verification before fabricating the curved steel slab 100 ensures the safety and reliability of the curved steel slab 100 in actual use, avoids accidents or rework due to insufficient strength, and guarantees construction quality and traffic safety.
[0039] The strength calculation and verification of the curved steel slab 100 includes establishing a structural model with one end rotating and the other end elastically supported, and calculating the maximum stress and deformation of the curved steel slab 100. Establishing a structural model with one end rotating and the other end elastically supported can more accurately simulate the stress situation of the curved steel slab 100 in actual operation, providing a reliable theoretical basis for strength calculation and design optimization.
[0040] In step 2, when preparing the curved steel slab 100, stiffening ribs 110 are welded onto the curved steel slab 100. Welding stiffening ribs 110 onto the curved steel slab 100 can significantly improve the structural stiffness and load-bearing capacity of the curved steel slab 100, enhance its bending and torsional resistance, and enable it to better withstand vehicle loads and other external forces.
[0041] Multiple stiffening ribs 110 are provided, arranged along the width direction of the curved steel slab 100, with a spacing of 300mm between adjacent stiffening ribs 110. This arrangement can evenly distribute the load and improve the overall load-bearing capacity and deformation resistance of the curved steel slab 100.
[0042] The stiffening rib 110 has an I-shaped cross-section. This shape has high bending and torsional resistance, which can reduce the amount of material used, reduce the self-weight of the structure, and improve the convenience of construction and transportation while ensuring structural strength.
[0043] In some specific embodiments of this utility model, the thickness of the vertical web of the stiffening rib 110 is 16mm, the thickness of the bottom plate of the stiffening rib 110 is 14mm, and the width of the bottom plate of the stiffening rib 110 is 130mm.
[0044] The top surface of the stiffening rib 110 is equipped with steel anti-slip strips. These strips effectively increase the coefficient of friction on the surface of the curved steel ramp 100, preventing the vehicle from slipping during driving and improving driving safety, especially in adverse weather conditions such as rain and snow.
[0045] In some specific embodiments of this utility model, the diameter of the rotating shaft core 400 is 120mm, the outer diameter of the fixed steel ring 410 is 150mm, the thickness of the fixed steel ring 410 is 10mm, the length of each segment of the fixed steel ring 410 is 130mm, the outer diameter of the rotatable steel ring 420 is 150mm, the thickness of the rotatable steel ring 420 is 10mm, and the length of each segment of the rotatable steel ring 420 is 170mm.
[0046] In some specific embodiments of this utility model, the supporting angle steel 300 is made of 150mm×12mm angle steel, and the diameter of the pre-embedded steel bar 200 is 20mm.
[0047] like Figure 4As shown, the curved steel approach slab 100 includes a circular curve segment 120. A first straight section 130 is provided on the side of the circular curve segment 120 closest to the abutment 1, and the first straight section 130 is connected to a rotatable steel ring 420. A second straight section 140 is provided on the side of the circular curve segment 120 closest to the road 2, and the second straight section 140 is laid on the road surface. The radius of the circular curve segment 120 is not less than 6m. By providing the first straight section 130 and the second straight section 140 on both sides of the circular curve segment 120, the overall curve of the curved steel approach slab 100 is smooth, which can better adapt to the transition between the bridge 1 and the road, improving driving comfort and stability. While reducing bumps and impacts during vehicle travel, the stress performance of the curved steel approach slab is optimized, allowing the load to be distributed more evenly across the entire approach slab, improving the structural load-bearing capacity and durability.
[0048] like Figure 4 As shown, the bottom surface of the second straight segment 140 is provided with a contact surface 141, and the contact surface 141 is in surface contact with the road surface. The curved surface contact can better distribute the pressure on the road surface when the curved steel approach slab 1 is under load, preventing the curved steel approach slab 1 from penetrating the road surface. This protects the road structure and extends the service life of the road surface. The surface contact design helps improve the stability and reliability between the curved steel approach slab and the road surface, reduces displacement and deformation of the approach slab during use, and ensures driving safety. When designing and manufacturing the curved steel approach slab, the pressure between the contact surface and the road is calculated, and this pressure is controlled to be less than the characteristic value of the road's bearing capacity. This ensures the safety and rationality of the curved steel approach slab in actual use, avoiding excessive burden on the road surface.
[0049] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.
Claims
1. A prefabricated anti-vehicle-jumping bridge abutment transition arc-shaped steel sheet structure, characterized in that, The utility model relates to a bridge abutment structure, which comprises: An arc-shaped steel sheet is arranged between the abutment and the road, and the arc-shaped steel sheet comprises a circular curve section, a first straight section is arranged on one side of the circular curve section close to the abutment, the first straight section is connected with a rotatable steel ring, a second straight section is arranged on the other side of the circular curve section close to the road, and the second straight section is arranged on the road surface; A rotating shaft core is arranged between the arc-shaped steel sheet and the abutment back wall, a plurality of fixed steel rings and rotatable steel rings are alternately arranged on the rotating shaft core, the rotatable steel ring is welded to the arc-shaped steel sheet, a pre-embedded steel bar is embedded in the abutment back wall, a support angle steel is welded to the pre-embedded steel bar, and the support angle steel is welded to the fixed steel ring.
2. The prefabricated anti-rolling bridge pier transition arc-shaped steel sheet structure according to claim 1, characterized in that, The second straight section is provided with a contact surface on the bottom surface, and the contact surface is in surface contact with the road surface.
3. The prefabricated anti-rolling bridge pier transition arc-shaped steel sheet structure according to claim 1, characterized in that, The arc-shaped steel sheet is provided with a stiffening rib.
4. The prefabricated anti-rolling bridge pier transition arc-shaped steel sheet structure according to claim 3, characterized in that, The arc-shaped steel sheet is provided with a plurality of stiffening ribs, the stiffening ribs are arranged along the width direction of the arc-shaped steel sheet, and the spacing between adjacent stiffening ribs is 300mm.
5. The prefabricated anti-rolling bridge pier transition arc-shaped steel sheet structure according to claim 3, characterized in that, The cross section of the stiffening rib is in the shape of an I-beam.
6. The prefabricated anti-rolling bridge pier transition arc-shaped steel sheet structure according to claim 5, characterized in that, The vertical web thickness of the stiffening rib is 16mm, the bottom plate thickness of the stiffening rib is 14mm, and the bottom plate width of the stiffening rib is 130mm.
7. The prefabricated anti-rolling bridge pier transition arc-shaped steel sheet structure according to claim 5, characterized in that, The top surface of the stiffening rib is provided with a steel anti-skid strip.
8. The prefabricated anti-rolling bridge pier transition arc-shaped steel sheet structure according to claim 1, characterized in that, The diameter of the rotating shaft core is 120mm, the outer diameter of the fixed steel ring is 150mm, the thickness of the fixed steel ring is 10mm, the length of each fixed steel ring is 130mm, the outer diameter of the rotatable steel ring is 150mm, the thickness of the rotatable steel ring is 10mm, and the length of each rotatable steel ring is 170mm.
9. The prefabricated anti-rolling bridge pier transition arc-shaped steel sheet structure according to claim 1, characterized in that, The support angle steel is made of an angle steel with a size of 150mm*12mm, and the diameter of the pre-embedded steel bar is 20mm.