Construction method for transition arc-shaped steel butt strap structure of assembly type anti-jumping axle platform

Abstract

The invention discloses a construction method of a fabricated anti-jumping bridge abutment transition arc-shaped steel transition slab structure, and belongs to the technical field of bridge structures. According to the construction method of the fabricated anti-jumping bridge abutment transition arc-shaped steel transition slab structure, the span and the height of an arc-shaped steel transition slab are determined according to the construction size, the lane width, the vehicle load and the jumping height of a bridge abutment; calculating the implementation range of the arc-shaped steel transition slab according to the road width, dividing the unit width of the arc-shaped steel transition slab according to the implementation range, and preparing the arc-shaped steel transition slab; embedded steel bars are embedded in the side, facing the road, of the abutment back wall, and then supporting angle steel is welded to the steel bars; the fixed steel rings and the rotatable steel rings are alternately arranged on the rotating shaft core in a sleeving mode; the fixed steel ring and the supporting angle steel are connected in a welding mode; and the rotatable steel ring is welded to the arc-shaped steel transition slab, one end of the arc-shaped steel transition slab is rotatably connected with the abutment back wall, the arc-shaped steel transition slab is rotated along the rotating shaft core, and the end, away from the abutment, of the arc-shaped steel transition slab is erected on the road surface.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge structures, and particularly relates to a construction method for an assembled anti-jumping vehicle abutment transition arc-shaped steel slab structure. Background Art

[0002] In soft soil areas, the thickness of soft soil reaches 50 - 60m. Even after foundation treatment in the abutment area, different degrees of settlement often occur for various reasons. Generally, the bridge foundation is a pile foundation with very small settlement, forming a step in the abutment area, resulting in the phenomenon of vehicle jumping at the bridge head. After the vehicle jumping at the bridge head occurs, the vehicle load impact coefficient in the abutment area is relatively large, exacerbating the settlement in the bridge head area. In order to temporarily improve the vehicle jumping phenomenon at the abutment and reduce driving risks, the competent department often adds a paving layer to the vehicle jumping area at the bridge head. The temporary paving can only improve the situation for a certain period of time. The temporary paving does not improve the bearing capacity of the foundation, but instead increases the load, resulting in new settlement and causing a vicious cycle. Summary of the Invention

[0003] The purpose of the present invention is to solve at least one of the technical problems existing in the prior art. For this reason, the present invention provides a construction method for an assembled anti-jumping vehicle abutment transition arc-shaped steel slab structure, and the formed arc-shaped steel slab structure can improve the vehicle jumping phenomenon at the bridge head.

[0004] The construction method for an assembled anti-jumping vehicle abutment transition arc-shaped steel slab structure according to an embodiment of the present invention is used to set an arc-shaped steel slab between the abutment and the road, and includes: Step 1: Determine the span and height of the arc-shaped steel slab according to the structural dimensions of the abutment, lane width, vehicle load, and vehicle jumping height; Step 2: Calculate the implementation range of the arc-shaped steel slab according to the road width, divide the unit width of the arc-shaped steel slab according to the implementation range, and prepare the arc-shaped steel slab; Step 3: Implant embedded steel bars on the side of the abutment back wall facing the road, and then weld support angle steels on the steel bars; Step 4: Alternately sleeved fixed steel rings and rotatable steel rings on the rotating shaft core; Step 5: Connect the fixed steel ring and the support angle steel by welding; Step 6: Weld the rotatable steel ring to the arc-shaped steel slab, so that one end of the arc-shaped steel slab is rotatably connected to the abutment back wall, and rotate the arc-shaped steel slab along the rotating shaft core, so that the end of the arc-shaped steel slab away from the abutment is laid on the road surface.

[0005] The construction method of the assembled anti-jumping vehicle bridge abutment transition arc-shaped steel slab structure according to the embodiments of the present invention has at least the following beneficial effects: Through the construction method of the assembled anti-jumping vehicle bridge abutment transition arc-shaped steel slab structure, an arc-shaped steel slab is erected between the bridge abutment and the road, with a short construction time, ensuring smooth road driving, reducing the phenomenon of vehicle jumping, and being beneficial to road driving safety. The arc-shaped steel slab can rotate, and the road end is a variable height section, which can adapt to the continuously increasing settlement caused by the self-consolidation of the roadbed by rotation, and will not aggravate the bridge head settlement phenomenon due to paving.

[0006] According to some embodiments of the present invention, in step 2, before preparing the arc-shaped steel slab, it further includes calculating and verifying the strength of the arc-shaped steel slab.

[0007] According to some embodiments of the present invention, calculating and verifying the strength of the arc-shaped steel slab includes establishing a structural model with one end rotating and the other end elastically supported, and calculating the maximum stress and deformation of the arc-shaped steel slab.

[0008] According to some embodiments of the present invention, in step 2, when preparing the arc-shaped steel slab, stiffeners are welded on the arc-shaped steel slab.

[0009] According to some embodiments of the present invention, multiple stiffeners are provided, and the multiple stiffeners are arranged along the width direction of the arc-shaped steel slab, and the spacing between adjacent stiffeners is 300 mm.

[0010] According to some embodiments of the present invention, the cross-section of the stiffener is in the shape of an I-beam.

[0011] According to some embodiments of the present invention, the vertical web thickness of the stiffener is 16 mm, the bottom plate thickness of the stiffener is 14 mm, and the bottom plate width of the stiffener is 130 mm.

[0012] According to some embodiments of the present invention, steel anti-slip strips are provided on the top surface of the stiffener.

[0013] According to some embodiments of the present invention, the arc-shaped steel slab includes a circular curve section. A first straight section is provided on the side of the circular curve section close to the bridge abutment, and the first straight section is connected to a rotatable steel ring. A second straight section is provided on the side of the circular curve section close to the road, and the second straight section is laid on the road surface.

[0014] According to some embodiments of the present invention, a contact surface is provided on the bottom surface of the second straight section, and the contact between the contact surface and the road surface is surface contact.

[0015] The additional aspects and advantages of the present invention will be partially given in the following description, partially will become obvious from the following description, or will be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below in conjunction with the drawings and embodiments: Figure 1 It is a schematic flow chart of the construction method of the assembled anti-jumping vehicle bridge abutment transition arc-shaped steel slab structure according to an embodiment of the present invention; Figure 2 It is a schematic structural diagram of the assembled anti-jumping vehicle bridge abutment transition arc-shaped steel slab according to an embodiment of the present invention; Figure 3 It is Figure 2 The top view of the arc-shaped steel slab in Figure 4 It is Figure 2 The partial enlarged view at position A in Figure 5 It is a partial structural schematic diagram of the assembled anti-jumping vehicle bridge abutment transition arc-shaped steel slab according to an embodiment of the present invention.

[0017] Reference numerals: Arc-shaped steel slab 100; Stiffening rib 110; Circular curve section 120; First straight section 130; Second straight section 140; Contact surface 141; Embedded steel bar 200; Support angle steel 300; Rotating shaft core 400; Fixed steel ring 410; Rotatable steel ring 420; Bridge abutment 1; Road 2. Specific embodiments

[0018] In the description of the present invention, it should be understood that for the orientation description, such as the orientation or positional relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0019] In the description of the present invention, the meaning of several is one or more, the meaning of multiple is two or more, greater than, less than, exceeding, etc. are understood as not including the present number, above, below, within, etc. are understood as including the present number. If the first and second are described only for the purpose of distinguishing technical features, they cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0020] In the description of the present invention, unless otherwise clearly defined, words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meaning of the above words in the present invention in combination with the specific content of the technical solution.

[0021] Refer to Figures 1 to 5 Describe the construction method of the assembled anti-jumping vehicle bridge abutment transition arc-shaped steel slab structure according to an embodiment of the present invention.

[0022] As Figures 1 to 5As shown, the construction method of the assembled anti-jumping vehicle bridge abutment transition arc steel slab structure according to the embodiment of the present invention includes: Step 1: Determine the span and height of the arc steel slab 100 according to the structural dimensions of the bridge abutment 1, lane width, vehicle load, and jumping height; By comprehensively considering factors such as the structural dimensions of the bridge abutment 1, lane width, vehicle load, and jumping height, the span and height of the arc steel slab 100 can be accurately determined to ensure its matching with the actual working conditions, thereby effectively improving the phenomenon of vehicle jumping at the bridge head and enhancing the comfort and safety of driving.

[0023] Step 2: Calculate the implementation range of the arc steel slab 100 according to the width of the road 2, divide the unit width of the arc steel slab 100 according to the implementation range, and prepare the arc steel slab 100; Calculating the implementation range of the arc steel slab 100 according to the width of the road 2 and dividing the unit width makes the layout of the arc steel slab 100 more reasonable, can fully cover the area to be treated, and is convenient for construction operation and quality control.

[0024] Step 3: Implant the embedded steel bars 200 on the side of the back wall of the bridge abutment 1 facing the road 2, and then weld the support angle steel 300 on the steel bars; Implanting the embedded steel bars 200 on the side of the back wall of the bridge abutment 1 facing the road 2 and welding the support angle steel 300 on it provides a stable support foundation for the subsequent installation of the arc steel slab 100, enhancing the overall stability and bearing capacity of the structure.

[0025] Step 4: Alternately sleeved the fixed steel ring 410 and the rotatable steel ring 420 on the rotating shaft core 400; Alternately sleeving the fixed steel ring 410 and the rotatable steel ring 420 on the rotating shaft core forms a flexible rotational connection structure, enabling the arc steel slab 100 to adaptively adjust according to the settlement difference between the bridge abutment 1 and the road 2, effectively alleviating the vehicle jumping phenomenon caused by settlement.

[0026] Step 5: Connect the fixed steel ring 410 and the support angle steel 300 by welding; Connecting the fixed steel ring 410 and the support angle steel 300 by welding has high connection strength and good reliability, can withstand large loads and deformations, and ensures the stability and safety of the arc steel slab 100 during use.

[0027] Step 6: Weld the rotatable steel ring 420 to the arc-shaped steel connecting plate 100 so that one end of the arc-shaped steel connecting plate 100 is rotatably connected to the back wall of the abutment 1. Rotate the arc-shaped steel connecting plate 100 along the rotation axis 400 so that the end of the arc-shaped steel connecting plate 100 away from the abutment 1 is laid on the road surface. Welding the rotatable steel ring 420 to the arc-shaped steel connecting plate 100 makes one end of the arc-shaped steel connecting plate 100 rotatably connected to the back wall of the abutment 1 and the other end laid on the road surface, forming a movable connection structure that can adapt to the uneven settlement between the abutment 1 and the road 2 and reduce the vehicle jumping phenomenon caused by settlement differences.

[0028] As Figures 2 to 4 shown, the arc-shaped steel connecting plate 100 structure is arranged at the junction of the abutment 1 and the road 2. One end of the arc-shaped steel connecting plate 100 is connected to the abutment 1 and the other end is connected to the road 2. The longitudinal line type of the steel connecting plate is arc-shaped. One end is welded to the fixed ring to achieve the purpose of rotating around the rotation axis 400; the other end has unequal heights and is placed on the road 2. The arc-shaped steel connecting plate 100 rotates with the rotation axis 400 to adapt to different height differences. The width of each steel connecting plate can be pre-welded into a width convenient for installation, storage, and transportation. The rotation axis 400 is the axis for the rotation of the arc-shaped steel connecting plate 100. The fixed steel ring 410 and the rotatable steel ring 420 are sleeved on the rotation axis 400, and a certain gap is reserved between the rotation axis 400 and the sleeves of the fixed steel ring 410 and the rotatable steel ring 420 to facilitate rotation. The support angle steel 300 is connected to the abutment 1 by the way of implanting steel bars. A certain length is reserved outside the embedded steel bars 200 and welded to the steel plate.

[0029] Through the construction method of this assembled anti-vehicle-jumping abutment transition arc-shaped steel connecting plate structure, the arc-shaped steel connecting plate 100 is erected between the abutment 1 and the road 2. The construction time is short, the smooth driving of the road 2 is guaranteed, the vehicle jumping phenomenon is reduced, and it is beneficial to the driving safety of the road 2. The arc-shaped steel connecting plate 100 can rotate, and the road 2 end is a variable height section, which can adapt to the continuously increasing settlement caused by the self-consolidation of the roadbed through rotation and will not aggravate the bridgehead settlement phenomenon due to paving. After the arc-shaped steel connecting plate 100 is fabricated and processed in modules, the installation and recycling construction process is simple. Once major repairs are needed in the bridgehead area, the arc-shaped steel connecting plate 100 can be removed and recycled.

[0030] In step 2, before preparing the arc-shaped steel connecting plate 100, it also includes calculating and verifying the strength of the arc-shaped steel connecting plate 100. Calculating and verifying the strength before preparing the arc-shaped steel connecting plate 100 can ensure the safety and reliability of the arc-shaped steel connecting plate 100 in actual use, avoid accidents or rework caused by insufficient strength, and guarantee the construction quality and driving safety.

[0031] The calculation and verification of the strength of the arc-shaped steel slab 100 include establishing a structural model with one end rotating and the other end elastically supported, and calculating the maximum stress and deformation of the arc-shaped steel slab 100. Establishing a structural model with one end rotating and the other end elastically supported can more accurately simulate the stress condition of the arc-shaped steel slab 100 in actual work, providing a reliable theoretical basis for strength calculation and design optimization.

[0032] In step 2, when fabricating the arc-shaped steel slab 100, stiffeners 110 are welded onto the arc-shaped steel slab 100. Welding the stiffeners 110 onto the arc-shaped steel slab 100 can significantly improve the structural stiffness and load-bearing capacity of the arc-shaped steel slab 100, enhance its bending and torsion resistance performance, enabling it to better withstand vehicle loads and other external forces.

[0033] Multiple stiffeners 110 are provided, and the multiple stiffeners 110 are arranged along the width direction of the arc-shaped steel slab 100, with a spacing of 300 mm between adjacent stiffeners 110. This arrangement can evenly distribute the load, improving the overall load-bearing capacity and anti-deformation performance of the arc-shaped steel slab 100.

[0034] The cross-section of the stiffener 110 is in the shape of an I-beam. This shape has high bending and torsion resistance performance, which can reduce the amount of material used, lower the structural self-weight, and improve the convenience of construction and transportation while ensuring the structural strength.

[0035] In some specific embodiments of the present invention, the vertical web thickness of the stiffener 110 is 16 mm, the bottom plate thickness of the stiffener 110 is 14 mm, and the bottom plate width of the stiffener 110 is 130 mm.

[0036] A steel anti-slip strip is provided on the top surface of the stiffener 110. It can effectively increase the friction coefficient on the surface of the arc-shaped steel slab 100, prevent the vehicle from slipping during driving, and improve driving safety, especially more significantly under harsh weather conditions such as rain and snow.

[0037] In some specific embodiments of the present invention, the diameter of the rotating shaft core 400 is 120 mm, the outer diameter of the fixed steel ring 410 is 150 mm, the thickness of the fixed steel ring 410 is 10 mm, the length of each section of the fixed steel ring 410 is 130 mm, the outer diameter of the rotatable steel ring 420 is 150 mm, the thickness of the rotatable steel ring 420 is 10 mm, and the length of each section of the rotatable steel ring 420 is 170 mm.

[0038] In some specific embodiments of the present invention, the supporting angle steel 300 uses an angle steel of 150 mm × 12 mm, and the diameter of the embedded steel bar 200 is 20 mm.

[0039] As Figure 5As shown, the arc-shaped steel bridging slab 100 includes a circular curve segment 120. On one side of the circular curve segment 120 close to the abutment 1, a first straight segment 130 is provided. The first straight segment 130 is connected to the rotatable steel ring 420. On the side of the circular curve segment 120 close to the road 2, a second straight segment 140 is provided. The second straight segment 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 segment 130 and the second straight segment 140 on both sides of the circular curve segment 120, the overall curve of the arc-shaped steel bridging slab 100 is smooth, which can better adapt to the transition between the bridge 1 and the road, improving the comfort and stability of driving. While reducing the bumps and impacts during vehicle driving, the stress performance of the arc-shaped steel bridging slab is optimized, enabling the load to be more evenly distributed on the entire bridging slab, improving the bearing capacity and durability of the structure.

[0040] As Figure 5 shown, a contact surface 141 is provided on the bottom surface of the second straight segment 140. The contact between the contact surface 141 and the road surface is a surface contact. The surface contact can better evenly distribute the pressure on the road surface when the arc-shaped steel bridging slab 1 bears the load, preventing the arc-shaped steel bridging slab 1 from piercing into the road surface. Protecting the road surface structure and extending the service life of the road surface. The design of surface contact helps to improve the stability and reliability between the arc-shaped steel bridging slab and the road surface, reducing the displacement and deformation of the bridging slab during use and ensuring driving safety. When designing and manufacturing the arc-shaped steel bridging slab, calculate the pressure between the contact surface and the road, and control this pressure to be less than the characteristic value of the bearing capacity of the road. This can ensure the safety and rationality of the arc-shaped steel bridging slab in actual use and avoid imposing too much burden on the road surface.

[0041] The above has described the embodiments of the present invention in detail with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the technical field, various changes can be made without departing from the gist of the present invention.

Claims

1. A construction method for an assembled anti-jump bridge abutment transition arc-shaped steel slab structure, which is used to set an arc-shaped steel slab between the abutment and the road, characterized in that: include: Step 1: Determine the span and height of the curved steel slab according to the structural dimensions of the abutment, lane width, vehicle load, and vehicle jump height; Step 2: Calculate the implementation scope of the curved steel scaffolding according to the road width, divide the unit width of the curved steel scaffolding according to the implementation scope, and prepare the curved steel scaffolding; Step 3: Implant embedded steel bars on the side of the abutment back wall facing the road, and then weld supporting angle steels on the steel bars; Step 4: Alternately sleeve the fixed steel ring and the rotatable steel ring on the rotating shaft core; Step 5: Connect the fixed steel ring and the supporting angle steel by welding; Step 6: Weld the rotatable steel ring to the arc-shaped steel scaffolding so that one end of the arc-shaped steel scaffolding is rotatably connected to the back wall of the abutment, rotate the arc-shaped steel scaffolding along the rotation axis so that the end of the arc-shaped steel scaffolding away from the abutment is placed on the road surface.

2. The construction method of the assembled anti-jump vehicle abutment transition arc steel slab structure according to claim 1 is characterized in that: In step 2, before preparing the curved steel slabs, the strength of the curved steel slabs is also calculated and verified.

3. The construction method of the assembled anti-jump vehicle abutment transition arc steel slab structure according to claim 2 is characterized in that: The calculation and verification of the strength of the curved steel slats 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 slats.

4. The construction method of the assembled anti-jump vehicle abutment transition arc steel slab structure according to claim 1 is characterized in that: In step 2, when preparing the curved steel lap plate, the stiffening ribs are welded on the curved steel lap plate.

5. The construction method of the assembled anti-jump vehicle abutment transition arc steel slab structure according to claim 4 is characterized in that: There are multiple stiffening ribs, which are arranged along the width direction of the arc-shaped steel slab, and the spacing between adjacent stiffening ribs is 300mm.

6. The construction method of the assembled anti-jump vehicle abutment transition arc steel slab structure according to claim 4 is characterized in that: The cross section of the stiffening rib is I-shaped.

7. The construction method of the assembled anti-jump vehicle abutment transition arc steel slab structure according to claim 6 is characterized in that: The thickness of the vertical web of the 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.

8. The construction method of the assembled anti-jump vehicle abutment transition arc steel slab structure according to claim 6 is characterized in that: The top surface of the stiffening rib is provided with a steel anti-slip strip.

9. The construction method of the assembled anti-jump vehicle abutment transition arc steel slab structure according to claim 1 is characterized in that: The arc-shaped steel cladding includes a circular curve segment, a first straight segment is arranged on the side of the circular curve segment close to the abutment, the first straight segment is connected to the rotatable steel ring, and a second straight segment is arranged on the side of the circular curve segment close to the road, and the second straight segment is arranged on the road surface.

10. The construction method of the assembled anti-jump vehicle abutment transition arc steel slab structure according to claim 9 is characterized in that: A contact surface is provided on the bottom surface of the second straight line segment, and the contact between the contact surface and the road surface is surface contact.

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