Arch Bridge Main Arch Repair and Assembly Platform and Construction Method

Abstract

This application provides an arch bridge main arch maintenance and assembly platform and construction method. The platform includes a single frame unit, a sliding force transmission mechanism, a frame unit connection mechanism, and an arch column positioning mechanism. Each single frame unit includes multiple first members and a pair of supporting members, with the multiple first members laterally connected between the pair of supporting members. The sliding force transmission mechanism includes two second members and an adjusting connection structure. One end of each of the two second members is connected to the pair of supporting members, and the other end is telescopically and securely connected via the adjusting connection structure, spanning the web members between the arch columns. The frame unit connection mechanism connects the multiple single frame units. The arch column positioning mechanism is positioned on the outer wall of the arch column and connected to the first members. This application requires no welding, does not occupy ground space, facilitates access, has high safety, and features a simple and lightweight platform structure that allows for quick installation and dismantling. It is highly versatile and can be used in similar arch bridge structures.

Description

Technical Field

[0001] This application relates to the field of arch bridge maintenance and renovation technology, and in particular to an arch bridge main arch maintenance and assembly platform and construction method. Background Technology

[0002] As time goes by and technical specifications are updated, most of the early-designed bridges have reached their design service life or no longer meet the current specifications. Therefore, these bridges must undergo necessary repairs and reinforcements to ensure continued safe use. The repair and reinforcement process for arch bridges is particularly complicated.

[0003] Given the unique structural characteristics of arch bridges, the maintenance and reinforcement of arch bridges must always ensure the integrity of their structural system, especially the maintenance and reinforcement of the main arch. Due to defects in the arch bridge manufacturing process and damage during years of use, the main arch requires a detailed current condition analysis and flaw detection, and repair and reinforcement work must be carried out on each damaged part. This necessitates a significant amount of construction work on the existing arch columns. Given the considerable height of the arch columns, the entire maintenance process involves working at height, typically using welding work platforms, ground-based platforms, or aerial work platforms.

[0004] Using a welding platform requires structural welding on the arch, which often causes welding damage to the arch columns and ruins the aesthetics, while also increasing the amount of work involved in grinding and removing the welds.

[0005] Using aerial work platforms requires frequent lifting and lowering, and the working space is limited, posing significant safety risks and requiring a large amount of on-site space. Using ground-mounted scaffolding requires a large site area, and the space outside the arch column is often small, resulting in limited applicability and a large amount of temporary structural work. Summary of the Invention

[0006] This application provides a platform and construction method for the maintenance and assembly of the main arch of an arch bridge, addressing the technical problems in related technologies where the arch column is high, the entire maintenance process involves high-altitude operations, welding platforms require structural welding on the arch body, causing welding damage to the arch column and detracting from its aesthetics, while also increasing the workload of grinding and cleaning the welds, while aerial work platforms require frequent lifting and lowering, have limited working space, pose significant safety risks, and require a large amount of on-site space; and ground-based supports require a large site area, and the space outside the arch column is often small, resulting in limited applicability and a large amount of temporary structural engineering.

[0007] In a first aspect, a maintenance and assembly platform for the main arch of an arch bridge is provided, comprising a single frame unit, a frame unit connection mechanism, a sliding force transmission mechanism, and an arch column positioning mechanism. Each single frame unit includes a first member and at least two pairs of supporting members. The first member is connected between the two pairs of supporting members, and the extension direction of the first member intersects the extension direction of the supporting members. The sliding force transmission mechanism includes at least two second members and an adjusting connection structure. One end of each of the two second members is connected to one of the two pairs of supporting members, and the other ends of the two second members face each other. They are telescopically and adjustablely fastened together by the adjusting connection structure and span across the web members between the arch columns. The frame unit connection mechanism connects multiple single frame units. The arch column positioning mechanism includes a positioning element positioned on the outer wall of the arch column and connected to the first member.

[0008] In some embodiments, at least two pairs of threaded through holes are spaced apart at the middle of the first rod, and the two pairs of support rods pass through the corresponding threaded through holes and are fastened to a preset height position by nuts.

[0009] In some embodiments, the adjustable connection structure includes at least two docking rods and a docking device, with one end of each of the two docking rods rotatably connected to the other end of each of the two second rods, and the other ends of the two docking rods being telescopically adjusted and fastened by the docking device.

[0010] In some embodiments, one end of each of the two connecting rods is pivotally connected to one end of each of the two second rods by bolts.

[0011] In some embodiments, the other end of both connecting rods is provided as a threaded end, and the connector is provided with positive and negative threaded connection holes, with the threads of both connecting rods being screwed into the corresponding threaded connection holes.

[0012] In some embodiments, the frame unit connection mechanism includes a plurality of first connecting rods and a plurality of second connecting rods, wherein the plurality of first connecting rods are respectively connected between the first rods of two frame units, and the plurality of second connecting rods are respectively connected between the second rods of two frame units.

[0013] In some embodiments, multiple first connecting rods are respectively connected between the first rods of the two frame units through angle-adjustable connecting structures, and multiple second connecting rods are respectively connected between the second rods of the two frame units through angle-adjustable connecting structures.

[0014] In some embodiments, the positioning element includes a positioning structure and an opening / closing clip fixed to the positioning structure, the positioning structure being used for positioning on the outer wall of the arch column, and the opening / closing clip being connected to a first member.

[0015] In some embodiments, a plurality of first connecting rods are located in the same plane, and a plurality of second connecting rods are located in the same plane;

[0016] Scaffold boards are laid between multiple first connecting members; and / or, scaffold boards are laid between multiple second connecting members.

[0017] Secondly, this application provides a construction method for the main arch maintenance and assembly platform of an arch bridge as described above, comprising the following steps:

[0018] Assemble single frame units;

[0019] Individual frame units are assembled into a frame structure;

[0020] A downward force transmission mechanism is constructed between the two vertical members of a single frame unit, spanning the web members between the arch columns;

[0021] It is positioned on the outer wall of the arch column by the arch column positioning mechanism and connected to the first rod.

[0022] The beneficial effects of the technical solution provided in this application include:

[0023] This application provides a maintenance and assembly platform for the main arch of an arch bridge. It eliminates the need for any welding work on the arch columns, employing entirely mechanical connections. It maximizes the utilization of the arch's own structural features to form a system, enabling the operation platform and access along the entire length of the arch. Once the structure is complete, it does not occupy any ground space, facilitates easy access, and offers high safety. Furthermore, the platform structure is simple and lightweight, allowing for rapid on-site installation and dismantling. It is highly versatile and can be used in similar arch bridge structures. Attached Figure Description

[0024] 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.

[0025] Figure 1 A schematic diagram of the installation support members and the first member of a single frame unit of the arch bridge main arch maintenance and assembly platform provided in this application embodiment;

[0026] Figure 2 A schematic diagram of the installation of the first and second connecting rods of a single frame unit of the arch bridge main arch maintenance and assembly platform provided in this application embodiment;

[0027] Figure 3A schematic diagram of the installation of the two connecting rods of a single frame unit of the arch bridge main arch maintenance and assembly platform provided in this application embodiment;

[0028] Figure 4 A schematic diagram of the installation positioning component of a single frame unit of the arch bridge main arch maintenance and assembly platform provided in this application embodiment;

[0029] Figure 5 A schematic diagram of the longitudinal section structure of the arch bridge main arch maintenance and assembly platform provided in this application embodiment;

[0030] Figure 6 A schematic diagram illustrating the installation scenario of a single frame unit being installed at the point of repair on the main arch of an arch bridge, as provided in this embodiment of the application.

[0031] Figure 7 A schematic diagram illustrating the installation scenario of a single frame unit being installed at the point of repair on the main arch of an arch bridge, as provided in this embodiment of the application.

[0032] Figure 8 This is a schematic diagram of the installation scenario where the arch bridge main arch repair and assembly platform provided in this application is assembled into a frame at the point where the arch needs repair.

[0033] In the diagram: 1. Supporting rod; 2. First rod; 3. Second rod; 4. First connecting rod; 5. Second connecting rod; 6. Connecting rod; 7. Connector; 8. Positioning component. Detailed Implementation

[0034] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0035] Generally, the main arch of the arch bridge includes multiple arch columns extending in an arc shape and web members connected in pairs between the arch columns. The longitudinal section of the arch bridge forms an arch ring, and the longitudinal section is perpendicular to the ground.

[0036] Please refer to Figure 5This application provides a maintenance and assembly platform for the main arch of an arch bridge, including a single frame unit, a frame unit connection mechanism, a sliding force transmission mechanism, and an arch column positioning mechanism. The single frame unit includes a first member 2 and at least two pairs of supporting members 1. The first member 2 is connected between the two pairs of supporting members 1, and the extension direction of the first member 2 intersects the extension direction of the supporting members 1. The frame unit connection mechanism connects multiple single frame units to form a three-dimensional frame structure. The sliding force transmission mechanism includes at least two second members 3 and an adjusting connection structure. One end of each of the two second members 3 is connected to one of the two pairs of supporting members 1, and the other ends of the two second members 3 face each other. They are telescopically and securely connected by the adjusting connection structure and span across the arch columns. The arch column positioning mechanism includes a positioning member 8, positioned on the outer wall of the arch column and connected to the first member 2.

[0037] The support rod 1 can be a vertical rod extending perpendicular to the ground, or it can be a non-vertical rod, as long as it can provide a connection for the first rod 2 and a connection point for one end of the two second rods 3.

[0038] This application provides a maintenance and assembly platform for the main arch of an arch bridge. No welding is required on the arch columns; all connections are mechanical, maximizing the use of the arch's own structure to form a system. It allows for the creation of an operating platform and passageway along the entire length of the arch. After formation, the platform is positioned on the outer wall of the arch column using an arch column positioning mechanism and connected to the first member 2. A downward force transmission mechanism transmits the downward force of the frame structure to the web members between the arch columns, forming a suspended frame. It occupies no ground space and can be easily accessed and disassembled using the frame unit connection mechanism of the first member 2 and the second member 3. It offers high safety, a simple and lightweight structure, and can be quickly installed and disassembled on-site. It is highly versatile and can be used in similar arch bridge structures.

[0039] In one embodiment, at least two pairs of threaded through holes are spaced apart at the middle of the first rod 2, and both pairs of the support rods 1 are threaded rods. The two pairs of support rods 1 pass through the corresponding threaded through holes and are fastened to a preset height position by nuts. The preset height position corresponds to the top surface or directly above the main arch of the arch bridge at the maintenance position.

[0040] In one embodiment, the adjusting connection structure includes at least two connecting rods 6 and a connector 7. One end of each of the two connecting rods 6 is rotatably connected to the other end of each of the two second rods 3. The other ends of the two connecting rods 6 are telescopically adjusted and fastened through the connector 7, so as to tightly hug the first rod 2, the adjusting connection structure, the two second rods 3, and the pair of support rods 1 to the outer periphery of the main arch.

[0041] In one embodiment, one end of each of the two connecting rods 6 is pivotally connected to one end of each of the two second rods 3 by bolts. Specifically, one end of each of the two connecting rods 6 has a pivot hole, and the other end of each of the two second rods 3 has a second pivot hole. One end of each connecting rod 6 is rotatably connected by bolts passing through the first pivot hole and the pivot hole at the other end of the second rod 3, and finally, a fastening connection is achieved by screwing a fastening nut onto the bolt.

[0042] In one embodiment, the other ends of both connecting rods 6 are configured as threaded ends, and the connector 7 is configured as a columnar structure with positive and negative threaded holes at both ends. The threads of both connecting rods 6 are screwed into the corresponding threaded holes. This achieves a telescopic adjustable connection, where the two second rods 3 are connected to the web members between the arch columns via the two connecting rods 6 and the connector 7. This transfers the downward force of the frame to the web members. Since the web members are generally inclined, their intersection with the arch column provides a stable hanging point for receiving force. Combined with the positioning element 8 positioned on the outer wall of the arch column and connected to the first rod 2, this effectively ensures that the final frame can be stably suspended on the arch without occupying any ground space.

[0043] In one embodiment, the frame unit connection mechanism includes multiple first connecting rods 4 and multiple second connecting rods 5. The multiple first connecting rods 4 are respectively connected between the first rods 2 of two frame units, and the multiple second connecting rods 5 are respectively connected between the second rods 3 of two frame units, so as to assemble multiple single frame units into a three-dimensional frame. The first rods 2 and the second rods 3 can be implemented as horizontal rods, with the extension direction of the horizontal rods being horizontal to the width direction of the top surface of the arch bridge. They can also be implemented as non-horizontal rods, as long as the first rods 2 can be connected between two supporting rods 1 and provide connecting support for the positioning member 8 positioned on the outer wall of the arch column. The first connecting rods 4 and the second connecting rods 5 can be implemented as vertical rods, or they can be implemented as non-vertical rods. The extension direction of the vertical rods is perpendicular to the plane containing the vertical rods and the first rods 2 and the second rods 3, as long as multiple single frame units can be assembled into a three-dimensional frame. Preferably, the first rod 2 and the first connecting rod 4 connected thereto are in the same plane, and the second rod 3 and the second connecting rod 5 connected thereto are in the same plane, so as to form a multi-layer structure. Scaffold boards can be laid on the multi-layer plane, making it convenient for maintenance personnel to climb up and down to stand and work.

[0044] In one embodiment, multiple first connecting rods 4 are respectively connected between the first rods 2 of the two frame units through angle adjustment connecting structures, and multiple second connecting rods 5 are respectively connected between the second rods 3 of the two frame units through angle adjustment connecting structures, so as to adapt to the arch bridge orientation at the arch bridge maintenance location, and the two or more frame units are hooped on the outer periphery of the arch at the maintenance location, that is, the outer support of the frame body is located on the outer periphery of the arch body, and the frame body is suspended on the arch body.

[0045] In one embodiment, the positioning member 8 includes a positioning structure and an opening and closing clip fixed to the positioning structure. The positioning structure is used to position the member on the outer wall of the arch column, and the opening and closing clip is connected to the first rod member 2.

[0046] Secondly, this application provides a construction method, comprising the following steps:

[0047] Step S1, as follows Figures 1-4 and Figure 6 Assemble single frame units;

[0048] Step S2, as follows Figure 7 and Figure 8 As shown, individual frame units are assembled into a frame structure, wherein... Figures 6-8 A view rotated 90 degrees; the dashed line in the image shows the front view of the arch bridge after rotating 90 degrees.

[0049] Step S3: Construct a downward force transmission mechanism that spans the web members between the two vertical members of a single frame unit;

[0050] Step S4: Position the arch column on the outer wall of the arch column using the arch column positioning mechanism and connect it to the first rod 2.

[0051] In a more specific embodiment, the arch bridge main arch maintenance and assembly platform provided in this application includes vertical members (φ60mm steel pipe), first horizontal members (φ100mm steel pipe), second horizontal members (φ48mm steel pipe), first longitudinal members, second longitudinal members (φ48mm steel pipe), connecting rod 6 (φ48mm steel pipe), connector 7 and positioning member 8, wherein the vertical members, first horizontal members, second horizontal members, connecting rod 6 and connector 7 together form a frame. The positioning component 8 is equipped with an openable clamp. The first horizontal member is placed on the positioning component 8 and fixed. Holes are opened at both near ends of the first horizontal member. The vertical member is inserted through the holes at both near ends of the first horizontal member to a suitable length and then anchored by nuts. Holes are opened at appropriate positions on the vertical member. The second horizontal member is inserted through the holes and fixed at both ends by nuts. The other end of the second horizontal member is provided with a first bolt hole. The connecting rod 6 is connected and fixed to the other end of the second horizontal member by bolts. The head of the connecting rod 6 is provided with threads and connected by a connector 7. The connector 7 is provided with positive and negative threads. The two frames are connected by the first longitudinal member and the second longitudinal member. Clamps are provided at the ends of the first longitudinal member and the second longitudinal member and are connected and clamped to the first horizontal member and the second horizontal member, respectively.

[0052] The entire platform requires at least two frames and longitudinal members to form an effective system. It can be arranged along the entire length of the arch. After the frame is formed, the vertical load of the structure is borne by the transverse members. The downward force generated by the curvature of the arch is transmitted to the web members of the arch column by the connecting rod 6. The frame is tightened in the transverse direction by the connecting device 7. The entire platform is mechanically fastened and the arches are tightened together. The space between the arches and the web members are used to form a suspended frame. Then, scaffold boards are laid on the longitudinal members to form the platform passage.

[0053] The method used in this application embodiment is as follows:

[0054] like Figure 1 As shown, first insert the vertical rod into the pre-drilled hole of the first horizontal rod on the ground, adjust it to the required height, and then secure it with a nut. Figure 2 As shown, the second horizontal member is then inserted into the pre-drilled holes in the vertical member and secured with nuts. The connecting rod 6 is then installed on the second horizontal member and bolts are inserted but not tightened yet, ensuring the connecting rod 6 can rotate. This completes the installation of one frame. The above steps are repeated to complete the installation of the second frame. Figure 3 As shown, a first longitudinal member and a second longitudinal member are installed between the two frames. The clamps of the longitudinal members are snapped onto the transverse members but not tightened, so that the angle between the two frames can be adjusted.

[0055] like Figure 4 As shown, positioning parts 8 are pre-installed on the arch where maintenance is required. The positioning parts 8 are equipped with openable and closable clips. Measures are taken to increase the friction of the lower part of the positioning parts 8 in contact with the arch to ensure that the structure does not slip during installation.

[0056] like Figure 6 As shown, a set of frames is then lifted to the required position using a crane, as follows: Figure 7-Figure 8 As shown, the first horizontal member is placed into the positioning piece 8 and clamped. The connecting rods 6 on both sides of the arch column are rotated to the horizontal and the connecting bolts are tightened. The two connecting rods 6 are tightened using the connector 7. Then the longitudinal member clamps are tightened to complete the installation of a set of frames. At this time, scaffold boards can be laid on the longitudinal members to form a platform passage. Continuing to add frames can form a continuous platform. Adding frames can be done by adding one or more frames individually.

[0057] The horizontal direction refers to the width of the top surface of the arch bridge, the longitudinal direction refers to the arc direction of the arch bridge, and the vertical direction refers to the direction perpendicular to the ground.

[0058] 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.

[0059] 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.

[0060] 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 maintenance and assembly platform for the main arch of an arch bridge, characterized in that, include: A single frame unit includes a first member and at least two pairs of support members, wherein the first member is connected between the two pairs of support members, and the extension direction of the first member intersects the extension direction of the support members; A frame unit connection mechanism connects multiple individual frame units to form a frame structure; The downward force transmission mechanism includes at least two second rods and an adjusting connection structure. One end of each of the two second rods is connected to two pairs of support rods, and the other ends of the two second rods are arranged facing each other. The two are telescopically and adjustablely fastened together by the adjusting connection structure and cross the web members between the arch columns. The downward force transmission mechanism transmits the downward force of the frame to the web members between the arch columns. An arch column positioning mechanism includes a positioning element, which is positioned on the outer wall of the arch column and connected to the first rod.

2. The arch bridge main arch maintenance and assembly platform as described in claim 1, characterized in that, At least two pairs of threaded through holes are spaced apart at the middle of the first rod. The two pairs of support rods pass through the corresponding threaded through holes and are fastened to a preset height position by nuts.

3. The arch bridge main arch maintenance and assembly platform as described in claim 1, characterized in that, The adjustable connection structure includes at least two docking rods and a docking device. One end of each of the two docking rods is rotatably connected to the other end of each of the two second rods. The other ends of the two docking rods are telescopically adjusted and fastened by the docking device.

4. The arch bridge main arch maintenance and assembly platform as described in claim 3, characterized in that, One end of each of the two connecting rods is pivotally connected to one end of each of the two second rods by bolts.

5. The arch bridge main arch maintenance and assembly platform as described in claim 4, characterized in that, The other end of both of the connecting rods is provided with a threaded end, and the connector is provided with positive and negative threaded connection holes. The threads of both connecting rods are screwed into the corresponding threaded connection holes.

6. The arch bridge main arch maintenance and assembly platform as described in claim 1, characterized in that, The frame unit connection mechanism includes multiple first connecting rods and multiple second connecting rods. The multiple first connecting rods are respectively connected between the first rods of two frame units, and the multiple second connecting rods are respectively connected between the second rods of two frame units.

7. The arch bridge main arch maintenance and assembly platform as described in claim 6, characterized in that, Multiple first connecting members are connected between the first members of the two frame units through angle-adjustable connecting structures, and multiple second connecting members are connected between the second members of the two frame units through angle-adjustable connecting structures.

8. The arch bridge main arch maintenance and assembly platform as described in claim 6, characterized in that, Multiple first connecting rods are located in the same plane, and multiple second connecting rods are located in the same plane; Scaffold boards are laid between multiple first connecting members; and / or, scaffold boards are laid between multiple second connecting members.

9. The arch bridge main arch maintenance and assembly platform as described in claim 1, characterized in that, The positioning element includes a positioning structure and an opening and closing clip fixed to the positioning structure. The positioning structure is used to position the element on the outer wall of the arch column, and the opening and closing clip is connected to the first rod.

10. A construction method for a maintenance and assembly platform for the main arch of an arch bridge as described in any one of claims 1 to 9, characterized in that, Includes the following steps: Assemble single frame units; Individual frame units are assembled into a frame structure; A downward force transmission mechanism is constructed between the two vertical members of a single frame unit, spanning the web members between the arch columns; It is positioned on the outer wall of the arch column by the arch column positioning mechanism and connected to the first member.

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