U-rib end-on welding operation port plug welding combined repair structure and method
By setting an inner welding operation window on the U-rib of the orthotropic steel bridge deck and using a combination of bolting and welding to repair the structure, the problems of the length and height of the inner welding operation port in the U-rib overhead position were solved, the structural strength and weld quality were improved, the inspection and maintenance process was simplified, and the cost was reduced.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CCCC SECOND HIGHWAY CONSULTANTS CO LTD
- Filing Date
- 2023-10-30
- Publication Date
- 2026-07-24
AI Technical Summary
In the existing technology, the length and height of the overhead inner welding port of the U-rib of orthotropic steel bridge deck are large, the butt weld is long, the inspection hand hole is located at the bottom of the U-rib, the overhead welding operation is difficult, and the performance of the repair structure is greatly affected by the welding quality.
The design incorporates a bolted-welded repair structure for the U-rib overhead internal welding operation port. This is achieved by setting an internal welding operation window on the U-rib of the orthotropic steel bridge deck, and using the repair section of the operation port and bolted connection plate for sealing and reinforcement. The design is improved to allow for horizontal or downward welding, and an inspection window is added to facilitate inspection and maintenance.
It improves the strength and fatigue performance of the U-rib structure, ensures stable weld quality, simplifies the inspection and maintenance process, reduces manufacturing costs, and improves welding efficiency and structural performance.
Smart Images
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Abstract
Description
Technical Field
[0001] This application relates to the field of bridge engineering construction technology, and in particular to the bolt-welded repair structure and method for the internal welding operation port of the U-rib in the overhead position. Background Technology
[0002] Orthotropic steel bridge decks are commonly used as the deck structure system for steel bridges due to their low self-weight, high strength and load-bearing capacity, ease of construction, and wide applicability. In particular, because orthotropic steel bridge deck systems are easy to fabricate into streamlined, flat steel box girder sections with good aerodynamic performance, they can effectively improve the wind resistance of long-span bridges and are widely used in long-span bridges spanning rivers and seas both domestically and internationally.
[0003] However, with the increasing traffic volume, these early-built long-span orthotropic steel box girder bridges, whether in Europe and the United States or in my country, have experienced serious fatigue failure problems, especially the welding fatigue failure of the closed stiffening ribs (mainly referring to closed U-ribs) of the orthotropic steel bridge deck. Now, with the rapid increase in traffic volume and serious overloading, this type of fatigue failure will be further aggravated.
[0004] In related technologies, a method for reinforcing orthotropic steel bridge decks by internal welding of U-ribs has been successfully proposed and applied to address the cracking problem of U-ribs in in-service bridges with orthotropic steel decks. The developed multi-segment flexible plug-in modular U-rib internal overhead welding platform and the constructed automated overhead internal welding system for in-service U-ribs have successfully solved the problem of overhead supplementary internal welding in the narrow space of in-service U-ribs, and realized the automated overhead supplementary welding of in-service U-ribs with inherent defects.
[0005] However, the following issues need further research and resolution regarding the method of reinforcing orthotropic steel bridge decks by internal welding of U-ribs: First, the length and height of the internal welding access port for the U-rib in the overhead position are relatively large, resulting in a long butt weld length; second, the inspection handhole inside the U-rib is located at the bottom of the U-rib, and the internal butt weld still requires overhead welding operations; third, the repair structure of the U-rib in the overhead position only uses welding, and the structural performance of the repair structure is greatly affected by the welding quality, so the structural performance of the repair structure needs to be improved. Summary of the Invention
[0006] This application provides a bolt-welded repair structure and method for the U-rib overhead internal welding operation port, in order to solve the problem that the repair structure of the U-rib internal welding reinforcement method for orthotropic steel bridge decks in related technologies needs further optimization.
[0007] The first aspect of this application provides a bolt-welded repair structure for the U-rib overhead internal welding port, including:
[0008] An orthotropic steel bridge deck system, the orthotropic steel bridge deck system includes a bridge deck top plate, an orthotropic steel bridge panel U-rib welded to the bridge deck top plate, and an inner welding operation window for an automatic welding robot to enter and exit the orthotropic steel bridge panel U-rib.
[0009] An inner welding operation window repair assembly includes an operation port repair section adapted to the opening shape of the inner welding operation window, and the operation port repair section is welded to the U-rib of the orthotropic steel bridge deck.
[0010] The operation port repair section is provided with an inspection window, and the operation port repair section and the orthotropic steel bridge deck U-rib are detachably connected by bolted connecting plates to close the inspection window.
[0011] In some embodiments: the operating port repair section includes two symmetrically arranged operating port repair section webs and an operating port repair section bottom plate connected to the bottom of the two operating port repair section webs, and the cross-section of the operating port repair section formed by the two operating port repair section webs and the operating port repair section bottom plate is a "U" shaped structure.
[0012] In some embodiments: the inspection window is opened on the web of any of the operation port repair sections, and the inspection window is a "U"-shaped notch away from the bottom plate of the operation port repair section. The web of the operation port repair section located at the edge of the inspection window is provided with a plurality of bolt mounting holes for inserting high-strength bolt kits.
[0013] In some embodiments: the inspection window is 400-600mm long and 40-60mm high; the bolted connection plate is 140-180mm high, 400-600mm long, and 4mm-8mm thick; the bolted connection plate is bolted to the orthotropic steel bridge deck U-rib and the operating port repair section by a high-strength bolt kit.
[0014] In some embodiments: the material of the operating port repair section is the same as the material of the orthotropic steel bridge deck U-rib, the height of the operating port repair section is between 150-220mm, the length of the operating port repair section is between 600-900mm, and the plate thickness of the operating port repair section is between 6mm-8mm.
[0015] In some embodiments: the edges of the operation port repair section are all beveled, the operation port repair section is located inside the inner welding operation window and is connected to the inner and outer welds of the orthotropic steel bridge deck U-rib by parallel welding, and the wall surface of the operation port repair section is flush with the wall surface of the orthotropic steel bridge deck U-rib.
[0016] In some embodiments: the orthotropic steel bridge deck U-rib includes two orthotropic steel bridge deck U-rib webs arranged symmetrically, and an orthotropic steel bridge deck U-rib bottom plate connected to the bottom of the two orthotropic steel bridge deck U-ribs, wherein the cross-section of the orthotropic steel bridge deck U-rib formed by the two orthotropic steel bridge deck U-rib webs and the orthotropic steel bridge deck U-rib bottom plate is a "U" shaped structure;
[0017] The inner welding operation window is opened along the length and height directions of the orthotropic steel bridge deck U-rib on the web and bottom plate of the two orthotropic steel bridge deck U-ribs, and the top of the inner welding operation window is preset with a set distance from the top plate of the bridge deck. The height of the inner welding operation window is between 150-220mm and the length is between 600-900mm.
[0018] In some embodiments: the orthotropic steel bridge deck U-rib web is provided with a plurality of bolt mounting holes for inserting high-strength bolt kits. The bolt mounting holes are located on the orthotropic steel bridge deck U-rib web near the top plate of the bridge deck. The high-strength bolt kit includes high-strength bolts and nuts, and the specifications of the high-strength bolts and nuts are M12-M20.
[0019] In some embodiments: the top of the orthotropic steel bridge deck U-rib is welded to the bottom surface of the bridge deck top plate, and the top of the orthotropic steel bridge deck U-rib is welded to the bottom surface of the bridge deck top plate to form an outer corner weld and an inner corner weld.
[0020] The second aspect of this application provides a construction method for a bolt-welded repair structure of a U-rib overhead internal weld access port. The method uses the bolt-welded repair structure of the U-rib overhead internal weld access port described in any of the above embodiments. The method includes:
[0021] Based on the material, dimensions, and shape of the inner welding operation window of the U-rib in the orthotropic steel bridge deck, the operation port repair section is prefabricated.
[0022] After the automatic welding robot has finished its work, the inner fillet weld between the U-rib of the orthotropic steel bridge deck and the top plate of the bridge deck at the inner welding operation window is repaired by overhead welding.
[0023] Align and match the repair section of the operating port with the inner welding operating window, and perform parallel welding connection along the outer side of the joint between the two.
[0024] Through the inspection window on the repair section, perform parallel welding connection along the inner side of the joint between the two sections.
[0025] The inner and outer welds at the joint are ground smooth, and the repair section of the operating port and the welds are sprayed with paint for rust prevention.
[0026] Drill holes to form bolt mounting holes on the U-ribs of the orthotropic steel bridge deck and the repair section of the access port;
[0027] Through the inspection window, high-strength bolts are installed into the bolt mounting holes from inside the U-ribs of the orthotropic steel bridge deck.
[0028] On the outside of the U-rib of the orthotropic steel bridge deck, the bolted connecting plate is connected to the high-strength bolts, and nuts are installed and finally tightened.
[0029] Apply paint to the bolted connection plate and high-strength bolt kit for rust prevention.
[0030] The beneficial effects of the technical solution provided in this application include:
[0031] This application provides a bolt-welded repair structure and method for the U-rib overhead internal welding operation port. The bolt-welded repair structure for the U-rib overhead internal welding operation port incorporates an orthotropic steel bridge deck system. This system includes a bridge deck top plate, an orthotropic steel bridge deck U-rib welded to the top plate, and an internal welding operation window for an automatic welding robot to enter and exit the U-rib. An internal welding operation window repair assembly includes an operation port repair section adapted to the opening shape of the internal welding operation window, which is welded to the orthotropic steel bridge deck U-rib. An inspection window is provided on the operation port repair section, and a bolted connection plate is detachably connected to the operation port repair section and the orthotropic steel bridge deck U-rib to close the inspection window.
[0032] Therefore, the bolt-welded repair structure of the U-rib overhead welding operation port in this application is connected to the orthotropic steel bridge deck U-rib by bolt-welding through the repair section of the operation port. This results in superior structural performance, improving the strength, stiffness, and fatigue performance of the orthotropic steel bridge deck U-rib structure at the inner welding operation window, and facilitating structural reinforcement of the orthotropic steel bridge deck U-rib at the inner welding operation window. Furthermore, by providing an inspection window on the repair section of the operation port, this application improves the overhead welding operation to a horizontal or downward welding operation, avoiding overhead welding work and improving the weld formation quality between the repair section of the operation port and the orthotropic steel bridge deck U-rib.
[0033] This application, by providing an inspection window on the repair section of the operating port, facilitates maintenance and repair during operation. When using an inspection trolley to inspect the interior of the U-ribs of orthotropic steel bridge decks, it allows for quick bidirectional movement of the trolley within the U-ribs for visual inspection and maintenance. This application features a simple and reasonable structure, convenient maintenance, low manufacturing cost, good economy, fast welding operation, stable weld quality, good structural performance, and convenient inspection of the U-rib interior. Furthermore, it is beneficial for structural repair of orthotropic steel bridge decks with overhead welding of the operating window. Attached Figure Description
[0034] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0035] Figure 1 This is a three-dimensional structural view of an embodiment of this application;
[0036] Figure 2 This is a left view of the structure of an embodiment of this application;
[0037] Figure 3 This is a right view of the structure of an embodiment of this application;
[0038] Figure 4 This is a structural front view of an embodiment of this application;
[0039] Figure 5 This is a schematic diagram of the internal welding operation window of the orthotropic steel bridge deck system according to an embodiment of this application;
[0040] Figure 6 This is a schematic diagram of the structure of the repair section of the operating port in an embodiment of this application;
[0041] Figure 7 This is a schematic diagram of the structure after the operation port repair section and the orthotropic steel bridge deck internal welding operation window are welded together according to an embodiment of this application.
[0042] Figure label:
[0043] 1. Orthotropic steel bridge deck U-rib; 2. Bridge deck top plate; 3. Operating port repair section; 4. Bolted connection plate; 5. High-strength bolts; 6. Nuts; 7. Inspection window; 8. Orthotropic steel bridge deck U-rib web; 9. Orthotropic steel bridge deck U-rib bottom plate; 10. Inner welded operating window; 11. Inner fillet weld; 12. Outer fillet weld; 13. Operating port repair section web; 14. Operating port repair section bottom plate; 15. Bolt mounting holes. Detailed Implementation
[0044] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0045] This application provides a bolt-welded repair structure and method for the U-rib overhead internal welding operation port, which can solve the problem that the repair structure of the U-rib internal welding reinforcement method for orthotropic steel bridge decks in related technologies needs further optimization.
[0046] See Figures 1 to 6 As shown, the first aspect of this application provides a bolt-welded repair structure for the U-rib overhead welding port, including:
[0047] An orthotropic steel bridge deck system includes a bridge deck top plate 2 and orthotropic steel bridge panel U-ribs 1 welded to the bridge deck top plate 2. An inner welding operation window 10 is provided on the orthotropic steel bridge panel U-ribs 1 for an automatic welding robot to enter and exit. The size of the inner welding operation window 10 on the orthotropic steel bridge panel U-ribs 1 must be large enough to allow the automatic welding robot to smoothly enter the interior of the orthotropic steel bridge panel U-ribs 1. The automatic welding robot performs overhead welding on the inner fillet welds of the bridge deck top plate 2 and the orthotropic steel bridge panel U-ribs 1 within the orthotropic steel bridge panel U-ribs 1.
[0048] An internal welding operation window repair assembly includes an operation opening repair section 3 adapted to the opening shape of the internal welding operation window 10. This section 3 is welded to the orthotropic steel bridge deck U-rib 1 to close the internal welding operation window 10 and repair and reinforce the orthotropic steel bridge deck U-rib 1. An inspection window 7 is provided on the operation opening repair section 3. A bolted connecting plate 4 is detachably connected to the operation opening repair section 3 and the orthotropic steel bridge deck U-rib 1 to close the inspection window 7. The bolted connecting plate 4 not only closes the inspection window 7 but also connects the operation opening repair section 3 and the orthotropic steel bridge deck U-rib 1, enhancing the structural strength between them.
[0049] The bolt-welded repair structure of the U-rib overhead welding operation port in this embodiment connects the operation port repair section 3 to the orthotropic steel bridge deck U-rib 1 via bolt-welding. This results in superior structural performance, improving the structural strength, stiffness, and fatigue performance of the orthotropic steel bridge deck U-rib 1 at the inner welding operation window 10. This facilitates structural reinforcement of the orthotropic steel bridge deck U-rib 1 at the inner welding operation window 10. Furthermore, by providing an inspection window 7 on the operation port repair section 3, this application improves the overhead welding operation to a horizontal or downward welding operation, avoiding overhead welding work and improving the weld formation quality between the operation port repair section 3 and the orthotropic steel bridge deck U-rib 1.
[0050] This embodiment of the application provides an inspection window 7 on the repair section 3 of the operation port, making maintenance and repair more convenient during operation. When using an inspection trolley to inspect the interior of the U-rib 1 of the orthotropic steel bridge deck, the inspection trolley can quickly move bidirectionally inside the U-rib 1 of the orthotropic steel bridge deck for visual inspection and maintenance. This application features a simple and reasonable structure, convenient maintenance, low manufacturing cost, good economy, fast welding operation, stable weld quality, good structural performance, and convenient inspection of the interior of the U-rib. It also facilitates the structural repair of the orthotropic steel bridge deck system with the overhead welding operation window 10.
[0051] In some alternative embodiments: see Figure 1 and Figure 6 As shown in the embodiment of this application, a bolt-welded repair structure for an overhead U-rib internal welded operating port is provided. The operating port repair section 3 of this bolt-welded repair structure includes two symmetrically arranged operating port repair section webs 13 and an operating port repair section bottom plate 14 connected to the bottom of the two operating port repair section webs 13. The two operating port repair section webs 13 and the operating port repair section bottom plate 14 together form the operating port repair section 3, which has a U-shaped cross-section. The operating port repair section 3 formed by the two operating port repair section webs 13 and the operating port repair section bottom plate 14 is a factory prefabricated component, and the two operating port repair section webs 13 and the operating port repair section bottom plate 14 are integrally stamped and bent from steel plate material.
[0052] Inspection window 7 is located on the web plate 13 of any access repair section, and is a U-shaped notch away from the bottom plate 14 of the access repair section. Multiple bolt mounting holes 15 for inserting high-strength bolt kits are provided on the web plate 13 of the access repair section located at the edge of the inspection window 7. The length of the inspection window 7 is between 400-600 mm, and the height is between 40-60 mm. The bolt connection plate 4 has a height between 140-180 mm, a length between 400-600 mm, and a thickness between 4 mm and 8 mm. The preferred dimensions of the bolt connection plate 4 are, but not limited to, a height of 160 mm, a length of 520 mm, and a thickness of 6 mm. The bolt connection plate 4 is bolted to the orthotropic steel bridge deck U-rib 1 and the access repair section 3 using high-strength bolt kits.
[0053] In some alternative embodiments: see Figures 5 to 7As shown in the embodiment of this application, a bolt-welded repair structure for the inner welding operation port of the U-rib in the overhead position is provided. The material of the operation port repair section 3 of this bolt-welded repair structure is the same as the material of the U-rib 1 of the orthotropic steel bridge deck. The height of the operation port repair section 3 is between 150-220mm, the length of the operation port repair section 3 is between 600-900mm, and the plate thickness of the operation port repair section 3 is between 6mm-8mm. The preferred, but not limited, dimensions of the operation port repair section 3 are: a height of 150mm, a length of 900mm, and a plate thickness of 6mm. The length, height, and thickness of the operation port repair section 3 are all customized according to the opening size of the inner welding operation window 10 on the U-rib 1 of the orthotropic steel bridge deck, so that the shape and size of the operation port repair section 3 and the inner welding operation window 10 are perfectly matched.
[0054] The edges of the repair section 3 at the operating port are all beveled. This bevel helps to increase the weld width between the repair section 3 and the orthotropic steel bridge deck U-rib 1, thereby enhancing the weld strength. The repair section 3 is located within the inner welding operating window 10 and is connected to both the inner and outer welds of the orthotropic steel bridge deck U-rib 1 using parallel welding, improving weld quality. The wall surface of the repair section 3 is flush with the wall surface of the orthotropic steel bridge deck U-rib 1, maintaining the original shape of the orthotropic steel bridge deck U-rib 1 and reducing welding stress concentration.
[0055] In some alternative embodiments: see Figure 5 As shown in the embodiment of this application, a bolted-welded repair structure for the U-rib overhead welding port is provided. The orthotropic steel bridge deck U-rib 1 of this bolted-welded repair structure includes two symmetrically arranged orthotropic steel bridge deck U-rib webs 8, and an orthotropic steel bridge deck U-rib bottom plate 9 connected to the bottom of the two orthotropic steel bridge deck U-rib webs 8. The orthotropic steel bridge deck U-rib 1, formed by the two orthotropic steel bridge deck U-rib webs 8 and the orthotropic steel bridge deck U-rib bottom plate 9, has a U-shaped cross-section.
[0056] The inner welding operation window 10 is opened along the length and height directions of the orthotropic steel bridge deck U-rib 1 on the web plates and bottom plates of the two orthotropic steel bridge deck U-ribs. A predetermined distance is set between the top of the inner welding operation window 10 and the top plate 2 of the bridge deck. The height of the inner welding operation window 10 is between 150-220mm, and the length is between 600-900mm. The preferred, but not limited, dimensions of the inner welding operation window 10 are: a height of 150mm, a length of 900mm, and a predetermined distance of 150mm between the top of the inner welding operation window 10 and the top plate 2 of the bridge deck.
[0057] In some alternative embodiments: see Figure 1 , Figure 5 and Figure 7As shown in the embodiment of this application, a bolt-welded repair structure with an internal welded access port for the U-rib in the overhead position is provided. The orthotropic steel bridge deck U-rib web 8 of this bolt-welded repair structure has multiple bolt mounting holes 15 for inserting high-strength bolt kits. The bolt mounting holes 15 are located on the orthotropic steel bridge deck U-rib web near the bridge deck top plate 2. The high-strength bolt kit includes high-strength bolts 5 and nuts 6, with specifications ranging from M12 to M20. The top of the orthotropic steel bridge deck U-rib 1 is welded to the bottom surface of the bridge deck top plate 2, forming an outer fillet weld 12 and an inner fillet weld 11.
[0058] See Figures 1 to 7 As shown, the second aspect of this application provides a construction method for a bolt-welded repair structure of the U-rib overhead internal welding port. This method uses the bolt-welded repair structure of the U-rib overhead internal welding port described in any of the above embodiments. The method includes:
[0059] Step 1: Based on the material, dimensions, and shape of the inner welding operation window of the U-rib 1 in the orthotropic steel bridge deck, prefabricate the operation port repair section 3;
[0060] Step 2: After the automatic welding robot has finished its work, perform overhead welding on the inner fillet weld 11 between the orthotropic steel bridge deck U-rib 1 and the bridge deck top plate 2 at the inner welding operation window 10.
[0061] Step 3: Align and match the operation port repair section 3 with the inner welding operation window 10, and perform parallel welding connection along the outer side of the joint between the operation port repair section 3 and the orthotropic steel bridge deck U-rib 1.
[0062] Step 4: Through the inspection window 7 on the repair section 3 of the operation port, perform a parallel welding connection along the inner side of the joint between the repair section 3 of the operation port and the U-rib 1 of the orthotropic steel bridge deck.
[0063] Step 5: Grind the inner and outer welds at the joint to make them smooth, and spray paint the repair section 3 of the operating port and the welds to prevent rust.
[0064] Step 6: Drill holes to form bolt mounting holes 15 on the U-rib 1 of the orthotropic steel bridge deck and the repair section 3 of the operating port;
[0065] Step 7: Through the inspection window 7, install the high-strength bolts 5 into the bolt mounting holes 15 from inside the orthotropic steel bridge deck U-rib 1.
[0066] Step 8: Connect the bolt connection plate 4 to the high-strength bolt 5 on the outside of the orthotropic steel bridge deck U-rib 1, and install the nut 6. Finally, tighten the nut 6 to secure the bolt connection plate 4 to the orthotropic steel bridge deck U-rib 1 and the operation port repair section 3.
[0067] Step 9: Apply paint to the bolt connection plate 4 and the high-strength bolt kit for rust prevention.
[0068] Working principle
[0069] This application provides a bolt-welded repair structure and method for the U-rib overhead internal welding operation port. The bolt-welded repair structure for the U-rib overhead internal welding operation port of this application incorporates an orthotropic steel bridge deck system. This orthotropic steel bridge deck system includes a bridge deck top plate 2, an orthotropic steel bridge deck U-rib 1 welded to the bridge deck top plate 2, and an internal welding operation window 10 for an automatic welding robot to enter and exit on the orthotropic steel bridge deck U-rib 1. An internal welding operation window repair assembly includes an operation port repair section 3 adapted to the opening shape of the internal welding operation window 10, which is welded to the orthotropic steel bridge deck U-rib 1. An inspection window 7 is provided on the operation port repair section 3, and a bolted connection plate 4 is detachably connected to the operation port repair section 3 and the orthotropic steel bridge deck U-rib 1 to close the inspection window 7.
[0070] Therefore, the bolt-welded repair structure of the U-rib overhead inner welding operation port in this application is connected to the orthotropic steel bridge deck U-rib 1 by bolt-welding through the operation port repair section 3. This results in superior structural performance, improving the structural strength, stiffness, and fatigue performance of the orthotropic steel bridge deck U-rib 1 at the inner welding operation window 10, and facilitating structural reinforcement of the orthotropic steel bridge deck U-rib 1 at the inner welding operation window 10. This application also improves the overhead welding operation by providing an inspection window 7 on the operation port repair section 3, changing it to horizontal or downward welding, avoiding overhead welding work, and improving the weld formation quality between the operation port repair section 3 and the orthotropic steel bridge deck U-rib 1.
[0071] This application, by providing an inspection window 7 on the repair section 3 of the operation port, makes maintenance and repair more convenient during the operation phase. When using an inspection trolley to inspect the interior of the U-rib 1 of the orthotropic steel bridge deck, the trolley can quickly move bidirectionally within the U-rib 1 for visual inspection and maintenance. This application features a simple and reasonable structure, convenient maintenance, low manufacturing cost, good economy, fast welding operation, stable weld quality, good structural performance, and convenient inspection of the interior of the U-rib. It also facilitates the structural repair of the overhead welding operation window of the orthotropic steel bridge deck system.
[0072] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application 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, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.
[0073] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.
[0074] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.
Claims
1. A bolt-welded repair structure for the U-rib overhead welding port, characterized in that, include: An orthotropic steel bridge deck system, the orthotropic steel bridge deck system includes a bridge deck top plate (2), an orthotropic steel bridge deck U-rib (1) welded on the bridge deck top plate (2), and an inner welding operation window (10) for an automatic welding robot to enter and exit the orthotropic steel bridge deck U-rib (1). The inner welding operation window repair assembly includes an operation port repair section (3) adapted to the opening shape of the inner welding operation window (10), and the operation port repair section (3) is welded to the orthotropic steel bridge deck U-rib (1). The operation port repair section (3) is provided with an inspection window (7), and the operation port repair section (3) and the orthotropic steel bridge deck U-rib (1) are detachably connected with a bolted connection plate (4) to close the inspection window (7). The operation port repair section (3) includes two operation port repair section webs (13) arranged symmetrically, and an operation port repair section bottom plate (14) connected to the bottom of the two operation port repair section webs (13). The operation port repair section (3) formed by the two operation port repair section webs (13) and the operation port repair section bottom plate (14) has a "U" shaped cross-section. The inspection window (7) is opened on the web plate (13) of any of the operation port repair sections, and the inspection window (7) is a "U" shaped notch in the direction away from the bottom plate (14) of the operation port repair section. Multiple bolt mounting holes (15) for inserting high-strength bolt kits are opened on the web plate (13) of the operation port repair section located at the edge of the inspection window (7). The edges of the operation port repair section (3) are all beveled. The operation port repair section (3) is located inside the inner welding operation window (10) and is connected to the inner and outer welds of the orthotropic steel bridge deck U-rib (1) by parallel welding. The wall surface of the operation port repair section (3) is flush with the wall surface of the orthotropic steel bridge deck U-rib (1).
2. The bolt-welded repair structure for the U-rib overhead welding port as described in claim 1, characterized in that: The inspection window (7) has a length between 400-600mm and a height between 40-60mm. The bolted connection plate (4) has a height between 140-180mm, a length between 400-600mm, and a plate thickness between 4mm-8mm. The bolted connection plate (4) is bolted to the orthotropic steel bridge deck U-rib (1) and the operation port repair section (3) by a high-strength bolt kit.
3. The bolt-welded repair structure for the U-rib overhead welding port as described in claim 1, characterized in that: The material of the operation port repair section (3) is the same as that of the orthotropic steel bridge deck U-rib (1). The height of the operation port repair section (3) is between 150-220mm, the length of the operation port repair section (3) is between 600-900mm, and the plate thickness of the operation port repair section (3) is between 6mm-8mm.
4. The bolt-welded repair structure for the U-rib overhead welding port as described in claim 1, characterized in that: The orthotropic steel bridge deck U-rib (1) includes two orthotropic steel bridge deck U-rib webs (8) arranged symmetrically, and an orthotropic steel bridge deck U-rib bottom plate (9) connected to the bottom of the two orthotropic steel bridge deck U-rib webs (8). The cross-section of the orthotropic steel bridge deck U-rib (1) formed by the two orthotropic steel bridge deck U-rib webs (8) and the orthotropic steel bridge deck U-rib bottom plate (9) is a "U" shaped structure. The inner welding operation window (10) is opened along the length and height directions of the orthotropic steel bridge deck U-rib (1) on the web (8) and bottom plate (9) of the two orthotropic steel bridge deck U-ribs. The top of the inner welding operation window (10) is preset with a set distance from the top plate (2) of the bridge deck. The height of the inner welding operation window (10) is between 150-220mm and the length is between 600-900mm.
5. The bolt-welded repair structure for the U-rib overhead welding port as described in claim 4, characterized in that: The orthotropic steel bridge deck U-rib web (8) has multiple bolt mounting holes (15) for inserting high-strength bolt kits. The bolt mounting holes (15) are located on the orthotropic steel bridge deck U-rib web (8) near the bridge deck top plate (2). The high-strength bolt kit includes high-strength bolts (5) and nuts (6). The specifications of the high-strength bolts (5) and nuts (6) are M12-M20.
6. The bolt-welded repair structure for the U-rib overhead welding port as described in claim 1, characterized in that: The top of the orthotropic steel bridge deck U-rib (1) is welded to the bottom of the bridge deck top plate (2), and the top of the orthotropic steel bridge deck U-rib (1) is welded to the bottom of the bridge deck top plate (2) to form an outer corner weld (12) and an inner corner weld (11).
7. A construction method for a bolt-welded repair structure with an internal welding port in the U-rib overhead position, characterized in that, The construction method uses the bolt-welded repair structure of the U-rib overhead internal welding port as described in any one of claims 1 to 6, and the method includes: Based on the material and size of the orthotropic steel bridge deck U-rib (1) and the shape of the inner welding operation window (10), the operation port repair section (3) is prefabricated; After the automatic welding robot has finished its work, the inner fillet weld between the orthogonal steel bridge deck U-rib (1) and the bridge deck top plate (2) at the inner welding operation window (10) is repaired by overhead welding. Align and match the operation port repair section (3) with the inner welding operation window (10), and perform parallel welding connection along the outer side of the joint between the two. Through the inspection window (7) on the repair section (3) of the operation port, the two are connected by parallel welding along the inner side of the joint. Grind the inner and outer welds at the joint to make them smooth, and spray paint the repair section (3) of the operating port and the weld to prevent rust. Drill holes (15) on the U-rib (1) of the orthotropic steel bridge deck and the repair section (3) of the operating port to form bolt mounting holes. Through the inspection window (7), high-strength bolts (5) are installed into bolt mounting holes (15) from inside the orthotropic steel bridge deck U-rib (1); On the outside of the orthotropic steel bridge deck U-rib (1), the bolt connection plate (4) is connected to the high-strength bolt (5), and the nut (6) is installed. Finally, the nut (6) is tightened. The bolted connection plate (4) and the high-strength bolt kit are sprayed with paint for rust prevention.