A method for reinforcing the H-shaped steel truss arch of a corrugated steel plate circular arch bridge

Abstract

The present invention discloses a method for reinforcing an H-shaped steel truss arch of a corrugated steel plate circular arc arch bridge, which relates to the technical field of traffic engineering construction, comprising the following steps: cold-bending multiple sections of H-shaped steel and extending them to form a semicircular arc-shaped H-shaped steel truss arch; lining an H-shaped steel truss arch in the middle of each circumferential plate width of the corrugated steel plate circular arc arch, with the two edges of the upper flange of the H-shaped steel truss arch completely contacting the two sides of the inner trough of the corrugated steel plate circular arc arch; A hard rubber pad is pasted between the gap formed by the contact between the upper flange and the trough on the inner side of the corrugated steel plate circular arc arch bridge; a lining steel plate is set on the corrugated steel plate circular arc arch seat at the arch foot of the H-shaped steel truss arch to support the arch foot of the H-shaped steel truss arch on the lining steel plate; a steel strip connecting belt is set along the transverse corrugation direction at the cross section of the arch crown, arch shoulder, and arch foot of the H-shaped steel truss arch to connect the multiple H-shaped steel truss arches under the arch of the corrugated steel plate circular arc arch bridge into one. The present invention forms a steel truss arch by lining the corrugated steel plate circular arc arch bridge with H-shaped steel, reinforces the corrugated steel circular arc arch bridge, makes it less likely to deform when subjected to radial compression, maintains or improves the load bearing capacity, and extends the service life of the corrugated steel plate arch bridge, with good results.

Description

Technical Field

[0001] The invention relates to the technical field of traffic engineering construction, in particular to a method for reinforcing an H-shaped steel truss arch of a corrugated steel plate circular arc arch bridge. Background Art

[0002] Corrugated steel plate is a new type of structure that can be widely used in roads and bridges. Compared with reinforced concrete structures, it has the advantages of small interface, light weight, strong deformation resistance, easy processing, production and transportation, simple assembly installation construction process, short construction period, and very few post-construction defects. It is currently widely used in road corrugated steel plate arch bridge projects.

[0003] Corrugated steel plate circular arch bridges are structures that use corrugated steel plates as the primary load-bearing component. The corrugated steel plate arch and its surrounding compacted filler form a soil-steel bond, jointly bearing external loads. They are widely used in road construction. Compared with small and medium-sized bridges with reinforced concrete or masonry structures, these bridges offer advantages such as adaptability to weak or special foundations and uneven foundation settlement and deformation, strong earthquake and deformation resistance, convenient and fast prefabricated construction, short construction periods, low project costs, minimal operational defects, low maintenance and repair costs, and environmentally friendly full utilization of steel production capacity. They hold broad application prospects. In the later stages of a corrugated steel plate arch bridge's operation, especially when extending its service life, maintaining or enhancing its structural stability and load-bearing capacity, ensuring that it is less susceptible to deformation under radial compression despite large radial forces, presents an urgent technical challenge. Summary of the Invention

[0004] In order to solve the above technical problems, the present invention provides a method for reinforcing the H-shaped steel truss arch of a corrugated steel plate circular arch bridge, which adopts the following technical solutions:

[0005] A method for reinforcing an H-shaped steel truss arch of a corrugated steel plate circular arch bridge, comprising a corrugated steel plate circular arch bridge and an H-shaped steel truss arch, comprises the following steps:

[0006] Step 1: cold-bending and extending multiple sections of H-shaped steel to form an H-shaped steel truss arch, wherein the curvature of the H-shaped steel truss arch is the same as the curvature of the corrugated steel plate circular arc arch bridge, and the radius of the H-shaped steel truss arch is not greater than the radius of the corrugated steel plate circular arc arch bridge;

[0007] Step 2: lining an H-shaped steel truss arch in the middle of the trough of each corrugated steel circumferential plate width of the corrugated steel plate circular arch bridge, with the two edges of the upper flange of the H-shaped steel truss arch completely contacting the two sides of the trough on the inner side of the corrugated steel plate circular arch bridge;

[0008] Step 3: Paste a hard rubber pad between the gap formed by the upper flange of each H-shaped steel truss arch and the trough on the inner side of the corrugated steel plate arc arch bridge;

[0009] Step 4, arranging a liner steel plate on the arch seat at the arch foot of the corrugated steel plate circular arc arch bridge, and supporting the arch foot of the H-shaped steel truss arch on the liner steel plate;

[0010] Step 5: At the cross-sections of the crown, spandrel, and arch foot of the H-shaped steel truss arch, a steel bar connecting strip is respectively arranged along the transverse corrugation direction. The length of the steel bar connecting strip is consistent with the length of all H-shaped steel truss arches connected in the transverse corrugation direction of the corrugated steel plate circular arc arch bridge. Each H-shaped steel truss arch with which the steel bar connecting strip contacts is fixed by welding.

[0011] Furthermore, in step 1, each section of the H-shaped steel truss arch is connected by bolt anchoring of steel clamps at the web of the H-shaped steel, and the webs and steel clamps at both ends of the H-shaped steel joint are connected by high-strength bolts.

[0012] Furthermore, in step 3, the width of the hard rubber pad is consistent with the width of the H-shaped steel truss arch flange, and the curvature of the surface of the hard rubber pad in contact with the trough on the inner side of the corrugated steel plate arc arch bridge is consistent with the inner arc of the trough.

[0013] Furthermore, the thickness of the liner steel plate in step 4 is not less than 10 .

[0014] Furthermore, the planar size of the lining steel plate is not less than the maximum cross-sectional size of the H-shaped steel truss arch, and is distributed throughout the troughs at the arch feet of the corrugated steel plate circular arc arch bridge.

[0015] Furthermore, in step 5, the steel strip connecting belt has a thickness of not less than 10 , width not less than 50 steel plates or strips.

[0016] Furthermore, the H-shaped steel truss arch, lining steel plate, and steel bar connecting strip are all plated with 84 Thick galvanized anti-corrosion coating.

[0017] In summary, the present invention includes at least one of the following beneficial technical effects:

[0018] 1. The present invention forms a steel truss arch by lining the corrugated steel plate arch with an H-shaped steel liner, thereby reinforcing the corrugated steel circular arc arch bridge, making it less likely to deform when subjected to radial compression, maintaining or improving the load bearing capacity, and extending the service life of the corrugated steel plate arch bridge, with good results.

[0019] 2. In the present invention, the H-shaped steel is only supported in the trough of the corrugated steel arch, and there is no need to connect the trough of the corrugated steel arch by welding or other means that is not conducive to the connection of the corrugated steel arch. The structure is simple and easy to implement, and the corrugated steel circular arch bridge that needs to be reinforced can be reinforced conveniently and quickly at any time without interrupting traffic and safely. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is an isometric drawing of an embodiment of the present invention;

[0021] Figure 2 A bottom view of an embodiment of the present invention;

[0022] Figure 3 is a front cross-sectional view of an embodiment of the present invention;

[0023] Figure 4 Yes Figure 3 A partial enlarged view of point A shown;

[0024] Figure 5 Yes Figure 3 A partial enlarged view of point B is shown;

[0025] Figure 6 It is a partial enlarged view of the cross section of the contact between the H-shaped steel truss arch and the corrugated steel plate circular arc arch bridge in the present invention.

[0026] Explanation of the accompanying symbols: 1. Corrugated steel plate circular arch bridge; 2. H-shaped steel truss arch; 3. Hard rubber pad; 4. Lining steel plate; 5. Steel bar connecting belt; 6. Steel splint; 7. High-strength bolt; 8. Arch seat; 9. Corrugated steel annular plate. DETAILED DESCRIPTION

[0027] The following is combined with Figure 1-4 The present invention is described in further detail.

[0028] Reference Figure 1-4 The embodiment of the present invention discloses a method for reinforcing an H-shaped steel truss arch of a corrugated steel plate circular arch bridge, comprising a corrugated steel plate circular arch bridge 1 and an H-shaped steel truss arch 2. The corrugated steel plate circular arch bridge 1 is a semicircular arch assembled and connected by multiple corrugated steel annular plates 9. The specific reinforcement method includes the following steps:

[0029] Step 1: Cold-bend and extend multiple sections of H-shaped steel to form an H-shaped steel truss arch 2. The curvature of the H-shaped steel truss arch 2 is the same as that of the corrugated steel plate circular arc arch bridge 1. The radius of the H-shaped steel truss arch 2 is no greater than the radius of the corrugated steel plate circular arc arch bridge 1, ensuring that the H-shaped steel truss arch 2 can be installed inside the corrugated steel plate circular arc arch bridge 1.

[0030] Step 2: lining an H-shaped steel truss arch 2 in the middle trough of each corrugated steel annular plate 9 of the corrugated steel plate circular arch bridge 1, with the two edges of the upper flange of the H-shaped steel truss arch 2 completely contacting the two sides of the trough on the inner side of the corrugated steel plate circular arch bridge. The H-shaped steel truss arch 2 is only supported in the corrugated steel plate circular arch 1, and is not connected to the corrugated steel plate circular arch bridge 1 in any other way that would cause an adverse connection.

[0031] Step 3: Paste a hard rubber pad 3 between the gaps formed by the upper flange of each H-shaped steel truss arch 2 and the trough inside the corrugated steel plate arc arch bridge 1;

[0032] Step 4: A padding steel plate 4 is arranged on the arch seat 8 at the arch foot of the corrugated steel plate circular arc arch bridge 1, and the arch foot of the H-shaped steel truss arch 2 is supported on the padding steel plate 4. The padding steel plate 4 supports and limits the H-shaped steel truss arch 2, thereby enhancing the reinforcement effect of the H-shaped steel truss arch 2 on the corrugated steel plate circular arc arch bridge 1.

[0033] In step 5, a steel bar connecting strip 5 is respectively arranged along the transverse corrugation direction at the cross-section of the arch crown, arch shoulder and arch foot of the H-shaped steel truss arch 2. The length of the steel bar connecting strip 5 is consistent with the length of all H-shaped steel truss arch connections in the transverse corrugation direction of the corrugated steel circular arc arch bridge 1. Each H-shaped steel truss arch 2 that the steel bar connecting strip 5 contacts is fixed by welding, and the H-shaped steel truss arches are connected together to form an overall H-shaped steel truss arch reinforcement structure system.

[0034] Reference Figure 3 In step 1 of the above method, the extensions between each section of H-steel constituting the H-steel truss arch 2 are connected by bolt anchoring of steel clamps 6 at the webs of the H-steel, and the webs at both ends of the H-steel joint are connected to the steel clamps 6 by high-strength bolts 7.

[0035] Reference Figure 4 In step 3 of the above method, the width of the hard rubber pad 3 is consistent with the width of the flange of the H-shaped steel truss arch 2, and the curvature of the surface of the hard rubber pad 3 that contacts the trough on the inner side of the corrugated steel plate arc arch bridge 1 is consistent with the inner arc of the trough, that is, the hard rubber pad 3 completely fills the gap formed by the contact between the upper flange of the H-shaped steel truss arch 2 and the trough of the corrugated steel plate arc arch bridge 1.

[0036] Preferably, in step 4 of the above method, the thickness of the liner steel plate 4 is not less than 10 .

[0037] As a preference, refer to Figure 1 In step 4 of the above method, the planar size of the lining steel plate 4 is not less than the maximum cross-sectional size of the H-shaped steel truss arch 2, and is distributed throughout the trough at the arch foot of the corrugated steel plate circular arc arch bridge 1.

[0038] As a preference, the steel strip connecting belt 5 in step 5 of the above method is made of a steel strip having a thickness of not less than 10 , width not less than 50 steel plates or strips.

[0039] As a preferred method, the H-shaped steel truss arch 2, the lining steel plate 4, and the steel bar connecting belt 5 are all plated with 84 Thick galvanized anti-corrosion coating.

[0040] The above are all preferred embodiments of the present invention, and are not intended to limit the scope of protection of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for reinforcing an H-shaped steel truss arch of a corrugated steel plate circular arch bridge, comprising a corrugated steel plate circular arch bridge (1) and an H-shaped steel truss arch (2), wherein the corrugated steel plate circular arch bridge (1) is composed of a plurality of corrugated steel annular plates (9) spliced ​​together transversely, and an arch seat (8) is provided at the arch foot, and is characterized in that: The following steps are involved: Step 1: cold-bending and extending multiple sections of H-shaped steel to form an H-shaped steel truss arch (2), wherein the curvature of the H-shaped steel truss arch (2) is the same as the curvature of the corrugated steel plate circular arc arch bridge (1), and the radius of the H-shaped steel truss arch (2) is not greater than the arc radius of the corrugated steel plate circular arc arch bridge (1); Step 2: lining an H-shaped steel truss arch (2) in the middle of the width of each corrugated steel annular plate (9) of the corrugated steel plate circular arc arch bridge (1), wherein the two edges of the upper flange of the H-shaped steel truss arch (2) are in complete contact with both sides of the trough on the inner side of the corrugated steel plate circular arc arch bridge (1); Step 3, pasting a hard rubber pad (3) between the gap formed by the upper flange of each H-shaped steel truss arch (2) and the trough inside the corrugated steel plate arc arch bridge (1); Step 4, arranging a liner steel plate (4) on the arch seat (8) at the arch foot of the corrugated steel plate circular arc arch bridge (1), and supporting the arch foot of the H-shaped steel truss arch (2) on the liner steel plate (4); In step 5, a steel strip connecting belt (5) is provided along the transverse corrugation direction at the cross-section of the arch crown, arch span, and arch foot of the H-shaped steel truss arch (2), and the length of the steel strip connecting belt (5) is consistent with the length of all H-shaped steel truss arches connected in the transverse corrugation direction of the corrugated steel plate arc arch bridge (1). The steel strip connecting belt (5) is fixed to each H-shaped steel truss arch (2) by welding.

2. The method for reinforcing an H-shaped steel truss arch of a corrugated steel plate circular arch bridge according to claim 1, characterized in that: In step 1, each section of the H-shaped steel of the H-shaped steel truss arch (2) is connected by bolt anchoring of the steel clamping plate (6) at the web of the H-shaped steel, and the webs at both ends of the H-shaped steel joint are connected to the steel clamping plate (6) by high-strength bolts (7).

3. The method for reinforcing an H-shaped steel truss arch of a corrugated steel plate circular arch bridge according to claim 2, characterized in that: In step 3, the width of the hard rubber pad (3) is consistent with the width of the flange of the H-shaped steel truss arch (2), and the curvature of the surface of the hard rubber pad (3) in contact with the trough on the inner side of the corrugated steel plate arc arch bridge (1) is consistent with the inner arc of the trough.

4. The method for reinforcing an H-shaped steel truss arch of a corrugated steel plate circular arch bridge according to claim 3, characterized in that: In step 4, the thickness of the liner steel plate (4) is not less than 10 .

5. The method for reinforcing an H-shaped steel truss arch of a corrugated steel plate circular arch bridge according to claim 4, characterized in that: The planar dimensions of the lining steel plate (4) are not less than the maximum cross-sectional dimensions of the H-shaped steel truss arch (2), and are distributed throughout the troughs at the arch foot of the corrugated steel plate circular arc arch bridge (1).

6. The method for reinforcing an H-shaped steel truss arch of a corrugated steel plate circular arch bridge according to claim 5, characterized in that: In step 5, the steel strip connecting belt (5) is made of a material having a thickness of not less than 10 , width not less than 50 steel plates or strips.

7. A method for reinforcing an H-shaped steel truss arch of a corrugated steel plate circular arch bridge according to any one of claims 1 to 6, characterized in that: The H-shaped steel truss arch (2), the lining steel plate (4), and the steel bar connecting strip (5) are all plated with 84 Thick galvanized anti-corrosion coating.

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