A replacement device and method for assembled special-shaped boom modules

Abstract

The present invention belongs to the technical field of bridge engineering, and specifically relates to an assembled special-shaped hanger module replacement device and a replacement method. The present invention belongs to the technical field of bridge engineering, and specifically relates to an assembled special-shaped hanger module replacement device and a replacement method. The present invention includes an assembled hoop that matches the cross-sectional shape of the arch rib. The top end of the temporary sling is fixed at the upper positioning point of the assembled hoop through a universal joint module so that the angle can be adjusted. The bottom end of the temporary sling is fixed on the lower suspension beam, and the tensioning of the temporary sling is achieved by a compensating jack. A bridge deck system beam is placed above the lower suspension beam. The present invention can solve the problem of difficulty in adjusting the angle of the temporary sling caused by the variable angle of the hanger of the special-shaped arch bridge. At the same time, the size of the hoop can be flexibly adjusted according to the change of the arch rib cross section during turnover use, reducing the cost and difficulty of replacing the hanger module at the variable cross-section arch rib, saving construction time and the number of labor and equipment, and the time required for construction can also be effectively shortened.

Description

Technical Field

[0001] The present invention belongs to the technical field of bridge engineering, and in particular relates to a device and method for replacing assembled special-shaped hanger modules. Background Art

[0002] As the main load-bearing component of an arch bridge, the actual service life of the hanger is roughly between 12 and 18 years due to various factors such as material properties, processing technology, construction quality, operation and maintenance. Therefore, there is a need to replace the hangers multiple times during the service life of the bridge. Urban landscape bridges not only beautify the city, but also often carry a large amount of traffic. The length of time required for hanger replacement operations is bound to affect the normal operation of urban traffic. How to shorten the time required for hanger replacement and reduce the impact of hanger module replacement on urban traffic is worthy of in-depth research. The complex arch rib design of urban landscape bridges, on the one hand, makes the installation of traditional hanger replacement devices more difficult, and on the other hand, makes the angles and postures of the hangers varied, further increasing the difficulty of installing and replacing the hanger modules, and also making the arch bridge more prone to stress relaxation and uneven stress distribution during use. For example, the current replacement of boom modules mainly uses temporary booms or temporary hoisting devices, but the temporary slings of the existing boom replacement devices are almost unable to adjust the angle, and are also not suitable for the variable-section arch ribs commonly used in special-shaped arch bridges. Customized clamps often cannot be used in a turnover manner, resulting in waste of materials, poor applicability, large consumption of large-scale lifting equipment, high construction costs, as well as many processes, slow work progress, and long impact on normal traffic flow. Given that frequent replacement of booms will inevitably consume considerable costs, ensuring the load-bearing capacity of the booms during use, optimizing the cable force, avoiding the need to replace the booms due to stress relaxation, uneven stress distribution, and other problems, and increasing the boom life and normal working period are obviously also an important way to reduce the maintenance cost of arch bridges. Therefore, it is urgent to solve this problem. Summary of the Invention

[0003] The purpose of the present invention is to overcome the deficiencies of the above-mentioned prior art and to provide an assembled special-shaped boom module replacement device, which can solve the problem of difficulty in adjusting the temporary sling angle caused by the variable angle of the boom of the special-shaped arch bridge. At the same time, the size of the clamp can be flexibly adjusted according to the change of the arch rib cross-section during turnover use, thereby reducing the cost and difficulty of replacing the boom module at the variable cross-section arch rib, saving construction time and the number of manpower and equipment, and the time required for construction can also be effectively shortened.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] An assembled special-shaped suspender module replacement device is characterized in that: the device includes an assembled hoop that matches the cross-sectional shape of the arch rib; the top end of the temporary sling is fixed to the upper positioning point of the assembled hoop through a universal joint module so that the angle can be adjusted; the bottom end of the temporary sling is fixed to the lower suspension beam and tensioned by a compensating jack; a bridge deck tie beam is placed above the lower suspension beam;

[0006] The assembled clamp includes corner end sliding blocks located at the four corner ends, the upper left corner end sliding block and the upper right corner end sliding block are fixed to each other by upper tension bolts, and the lower left corner end sliding block and the lower right corner end sliding block are fixed to each other by lower tension bolts; the two ends of the left hinged rod are respectively hinged to the upper left corner end sliding block and the lower left corner end sliding block, and the two ends of the right hinged rod are respectively hinged to the upper right corner end sliding block and the lower right corner end sliding block; the upper tension bolts, lower tension bolts, left hinged rod and right hinged rod are all provided with positioning plates for fitting the corresponding surfaces of the arch ribs.

[0007] Preferably, the upper tension bolts, lower tension bolts, left hinge rod, right hinge rod and corner end sliding blocks that cooperate with each other form a group of positioning units, and the positioning units are in two groups and connected to each other through positioning rods arranged along the length direction of the arch rib; the positioning rods between the two groups of upper right corner end sliding blocks and between the two groups of upper left corner end sliding blocks are respectively rotatably matched with rotating drums, and mounting holes are radially provided at the rotating drums, and the top end of the temporary sling is hinged in the mounting hole through a horizontal hinge shaft, and the axis of the horizontal hinge shaft is perpendicular to the axis direction of the rotating drum; the rotating drum and the horizontal hinge shaft combine to constitute the universal joint module.

[0008] Preferably, a side of the positioning plate facing the arch rib surface is padded with an anti-slip and wear-resistant layer.

[0009] Preferably, the assembled clamps are in two groups and are arranged in sequence along the length direction of the arch rib. The temporary slings at the two groups of assembled clamps extend downward and are respectively fixed at the two ends of the lower suspension beam, so that the lower suspension beam forms a bearing platform for the bridge deck crossbeam; the top end of the hanger module is fixed on the arch rib through the upper suspension point, and the bottom end of the hanger module is fixed on the bridge deck crossbeam through the lower suspension point. A tensioning jack for providing tensioning force to the hanger module is provided at the bridge deck crossbeam; a cable force sensor for testing the cable force at the hanger module is also arranged on the hanger module.

[0010] Preferably, the boom module includes an intermediate boom, the top end of the intermediate boom is hinged at the upper hanging point, the bottom end of the intermediate boom is sleeved with a connecting block, hooks are symmetrically arranged on both sides of the connecting block, thereby forming a hook fit with two groups of symmetrically arranged lifting rings at the lower hanging point, thereby limiting the upward movement of the connecting block relative to the lower hanging point; a section of the rod body of the intermediate boom extending out of the connecting block is provided with an external threaded section, and a fastening nut is threadedly fitted at the external threaded section, thereby limiting the upward movement of the intermediate boom relative to the connecting block; the rope force sensor is arranged on the intermediate boom.

[0011] Preferably, the lower hanging point includes a lower ear plate directly fixed on the bridge deck crossbeam, the bottom of the lower pull rod is hinged on the lower ear plate, and the lifting ring is arranged on the top of the lower pull rod; there are two lower pull rods and they are symmetrically arranged along the axis of the middle hanger.

[0012] Preferably, the lower ear plate includes a bottom plate and a vertical plate arranged on the bottom plate, and the vertical plate and the bottom plate intersect with each other; the vertical plate constitutes a hinge plate for hingedly connecting the lower pull rod, and the two are hinged to each other through a lower pin shaft.

[0013] Preferably, the upper hanging point includes an upper ear plate directly fixed on the arch rib, and a fork ear is coaxially installed on the top end of the intermediate hanger. The fork ear and the upper ear plate are plugged into each other and hinged to each other through an upper pin shaft.

[0014] Preferably, when performing maintenance on the intermediate boom, the cable tension is adjusted by tightening the fastening nut. The number of turns required for the fastening nut is calculated by the following formula:

[0015]

[0016] Where:

[0017] n is the number of revolutions required to tighten the nut;

[0018] F is the cable force adjustment value, which is obtained by subtracting the current cable force sensor reading from the rated cable force value of the middle boom;

[0019] L is the usable length of the middle boom;

[0020] p is the thread pitch of the external thread section at the middle boom;

[0021] E is the elastic modulus of the middle boom;

[0022] S is the cross-sectional area of ​​the middle boom.

[0023] Preferably, a replacement method, which applies the aforementioned assembled special-shaped boom module replacement device, is characterized by comprising the following steps:

[0024] S1. Install the assembled clamp on the arch rib at the location of the boom module to be replaced, adjust the assembled clamp to make its shape fit the cross section of the arch rib, and then tighten it with tension bolts;

[0025] S2. Install a lower sling beam below the bridge deck crossbeam, then install temporary slings, and adjust the length of the temporary slings to tighten the bridge deck crossbeam, ensuring that the temporary slings are evenly stressed;

[0026] S3. Install the compensating jack under the lower hanging beam, connect the compensating jack to the hydraulic pump station through the hydraulic pipe, and check the connection security and stable load-bearing capacity of each component;

[0027] S4. Install a static level and cable force sensor around the boom module to be replaced and adjacent boom modules;

[0028] S5. Cut the steel wires of the old boom module step by step, control the compensating jacks to tension them step by step, adjust the elevation change value of each control point to be within the design requirement range, and realize the transfer of the cable force of the old boom module to the assembled special-shaped boom module replacement device;

[0029] S6. Install the new boom module and tension it using the tensioning jack. At the same time, control the compensating jack to retract the cylinder step by step to transfer the cable force at the replacement device of the assembled special-shaped boom module to the new boom module. After tensioning it into place, anchor the new boom module.

[0030] S7. Remove the assembled special-shaped boom module replacement device and move to the next boom module that needs to be replaced. Repeat the above steps to complete the replacement of other boom modules.

[0031] The beneficial effects of the present invention are:

[0032] 1) The present invention proposes an assembled hanger replacement device suitable for special-shaped arch bridges. The device has a simple structure, reliable performance, and is easy to install. The bidirectional rotating universal joint module realizes flexible multi-directional adjustment of the temporary sling, which solves the problem of difficulty in adjusting the angle of the temporary sling caused by the variable angle of the hanger of the special-shaped arch bridge, reduces the construction difficulty of the hanger replacement, saves construction time and the number of labor and equipment, and reduces the construction cost of replacing the arch bridge hanger.

[0033] 2) The adjustable assembled anti-slip clamp structure adopted in the present invention has the advantages of simple structure, flexible layout, easy installation, safety and reliability. The clamp can be flexibly adjusted according to the changes in the arch rib cross-section during turnover use, which solves the problem that the traditional clamp structure is only applicable to arch ribs with equal cross-section, and thus multiple clamps need to be made when replacing the variable-section arch rib hanger, reducing the cost and difficulty of replacing the variable-section arch rib hanger and shortening the construction time.

[0034] 3) The assembled hoop proposed in the present invention is composed of several components, which have low component processing difficulty, simple assembly and disassembly, easy transportation and storage, and can be compatible with the replacement of hangers of arch bridges with various cross-sections. It has a wide range of applications and can be reused, saving materials and reducing the maintenance cost of arch bridges.

[0035] 4) The present invention uses a cable force sensor to assist in force monitoring and replacement of the boom module, which can effectively reduce the error of the conventional boom force measurement method in measuring the short boom force, ensure the safety of the structure during the boom module replacement, and effectively avoid possible safety problems during the boom module replacement.

[0036] 5) Based on the above structure, the replacement method provided by the present invention can achieve precise control of displacement and force changes, thereby achieving a smooth and continuous conversion of the internal forces of the old and new booms and the temporary load-bearing system. When replacing the boom module, this replacement method can realize real-time voltage stabilization and compensation based on the cable tension sensor and the corresponding jacks, which can realize the rapid replacement of the boom module when the bridge is in traffic condition, reducing the impact of boom module replacement on traffic. At the same time, this replacement method can even replace multiple boom modules synchronously with multiple devices in parallel, which can further shorten the time required for boom module replacement, with significant results.

[0037] 6) The present invention also abandons the traditional boom structure and uses a new type of boom module that is convenient and detachable. On the one hand, it adopts a detachable intermediate boom. When in use, it relies on the cooperation of the hook and the ring to ensure its convenient detachability, and relies on the symmetrical layout of the lower hanging points to further optimize the boom bearing structure. At the same time, it solves the problem that ordinary booms are relatively cumbersome to replace and maintain. The intermediate boom can be installed and replaced quickly, which reduces the impact of arch bridge maintenance on urban traffic, reduces the cost of boom module replacement, and is suitable for various forms of arch bridges. On the other hand, a combination structure of a fastening nut and a connecting block is added to the bottom end of the intermediate boom. While the connecting block forms the assembly base of the aforementioned ring and hook, it relies on the cooperation of the fastening nut and the cable force sensor to achieve real-time compensation of tensile stress at the intermediate boom, preventing stress relaxation problems of the boom module. This improves the convenience of replacing the intermediate boom while also ensuring the normal service life of the boom module, making it flexible and convenient to use.

[0038] 7) Based on the above structure, the present invention further proposes a cable force optimization control method, which can simply and conveniently realize the optimization calculation of cable force, is more suitable for quick operation by a single person on site, has a lower threshold, and can effectively ensure or even extend the service life of the boom module, with significant results. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 This is a working state diagram of one embodiment of the present invention;

[0040] Figure 2 for Figure 1 Front view of

[0041] Figure 3 and Figure 4 It is a schematic diagram of the three-dimensional structure of the assembled clamp;

[0042] Figure 5 It is a schematic diagram of the three-dimensional structure of the boom module;

[0043] Figure 6 and Figure 7 The figures are side views of the structures of two embodiments of the boom module;

[0044] Figure 8 It is the front view of the boom module;

[0045] Figure 9 The diagram shows the hook and eye in unlocked state;

[0046] Figure 10 This is the structural explosion diagram of the boom module.

[0047] The actual correspondence between the reference numerals and component names of the present invention is as follows:

[0048] A-arch rib; B-bridge deck beam;

[0049] 10-Assembled clamp; 11-Sliding block at upper left corner; 12-Sliding block at upper right corner; 13-Sliding block at lower left corner; 14-Sliding block at lower right corner; 15-Upper tension bolt; 16-Lower tension bolt; 17-Left hinge rod; 18-Right hinge rod; 19-Positioning plate;

[0050] 20-temporary sling; 30-universal joint module; 31-rotating drum; 32-horizontal articulated shaft;

[0051] 40-Lower hanging beam; 50-Compensating jack; 60-Positioning rod;

[0052] 70- boom module; 71- upper hanging point; 71a- upper ear plate; 71b- upper pin; 72- lower hanging point; 72a- lifting ring; 72b- lower ear plate; 72c- lower pull rod; 72d- lower pin; 73- middle boom; 73a- external threaded section; 73b- scale; 74- connecting block; 74a- hook; 75- fastening nut; 76- cable force sensor. DETAILED DESCRIPTION

[0053] For ease of understanding, here we combine Figure 1-10 The specific structure and working mode of the present invention are further described as follows:

[0054] An assembled special-shaped arch bridge suspender replacement device includes an adjustable and anti-slip assembled clamp 10, a bidirectionally rotatable universal joint module 30, a temporary sling 20, a lower sling beam 40, a hydraulic jack, and corresponding sensors.

[0055] The adjustable assembled clamp 10 includes corner end sliding blocks located at the four corner ends. The upper left corner end sliding block 11 and the upper right corner end sliding block 12 are fixed to each other by upper tension bolts 15, and the lower left corner end sliding block 13 and the lower right corner end sliding block 14 are fixed to each other by lower tension bolts 16. The two ends of the left hinge rod 17 are respectively hinged to the upper left corner end sliding block 11 and the lower left corner end sliding block 13, and the two ends of the right hinge rod 18 are respectively hinged to the upper right corner end sliding block 12 and the lower right corner end sliding block 14. At the same time, as Figure 3-4 As shown, the upper tension bolts 15, the lower tension bolts 16, the left hinge rod 17, the right hinge rod 18 and the corner end sliding blocks that cooperate with each other form a group of positioning units. The positioning units are divided into two groups and are connected to each other by positioning rods 60 arranged along the length direction of the arch rib A.

[0056] In addition, if Figure 3-4 As shown, the positioning rods 60 between the two sets of sliding blocks 11 at the upper left corners are respectively rotatably engaged with rotating cylinders 31, and mounting holes are radially penetrated through the rotating cylinders 31. The top end of the temporary sling 20 is hinged in the mounting hole through a horizontal hinge shaft 32, and the axis of the horizontal hinge shaft 32 is perpendicular to the axis direction of the rotating cylinder 31; the rotating cylinder 31 and the horizontal hinge shaft 32 are combined to constitute the said universal joint module 30.

[0057] For anti-slip performance, positioning plates 19 for fitting the corresponding surfaces of the arch rib A can be set on the rod bodies of the upper tension bolts 15, the lower tension bolts 16, the left hinged rod 17 and the right hinged rod 18, and an anti-slip and wear-resistant layer can be set on the inner side of the positioning plate 19.

[0058] The hydraulic jacks include a compensating jack 50 for tensioning the temporary sling 20 and a tensioning jack for tensioning the boom module 70. The lower sling beam 40 is provided with a lower positioning point for the temporary sling 20 and a reserved installation position for the compensating jack 50.

[0059] The sensors include a static level for measuring changes in bridge deck elevation and a cable force sensor 76 for monitoring the cable force of the boom module 70. The cable force sensor 76 is preferably a magnetic flux sensor, and the signal output end of the sensor is communicatively connected to the central controller.

[0060] When the replacement is actually carried out, the lifting process of the boom module 70 includes the following steps:

[0061] S1. Install the assembled hoop 10 on the arch rib A at the location of the boom module 70 to be replaced, adjust the assembled hoop 10 so that its shape fits the cross-section of the arch rib A, and then tighten it with tension bolts;

[0062] S2. Install the lower sling beam 40 below the bridge deck crossbeam B, then install the temporary slings 20, and adjust the length of the temporary slings 20 to tighten the bridge deck crossbeam B, ensuring that the temporary slings 20 are evenly stressed.

[0063] S3. Install a compensating jack below the lower hanging beam 40, connect the compensating jack to the hydraulic pump station through a hydraulic pipe, and check the connection security and stable load-bearing capacity of each component;

[0064] S4. Install a static level and a cable force sensor 76 around the boom module 70 to be replaced and adjacent boom modules 70;

[0065] S5, cutting the steel wires of the old boom module 70 step by step, controlling the compensating jacks 50 to tension them step by step, adjusting the elevation change values ​​of each control point to be within the design requirements, and transferring the cable force of the old boom module 70 to the replacement device of the assembled special-shaped boom module 70;

[0066] S6. Install the new boom module 70 and tension it using the tensioning jacks. At the same time, control the compensating jacks 50 to retract the cylinders step by step to transfer the cable force at the replacement device of the assembled special-shaped boom module 70 to the new boom module 70. After tensioning it into place, anchor the new boom module 70.

[0067] S7, dismantle the replacement device of the assembled special-shaped boom module 70 and move to the next boom module 70 that needs to be replaced, and repeat the above steps to complete the replacement of other boom modules 70.

[0068] On the basis of the temporary hanging composed of the above components of the present invention, it can be installed and replaced with ordinary hanging rods, and can also be further matched with Figure 5-10 The boom module 70 shown is used to meet the corresponding installation, replacement and maintenance requirements.

[0069] Further, the specific embodiment of the boom module 70 is shown in FIG. Figure 5-10 As shown, it includes an intermediate suspension rod 73, a lower pull rod 72c, a connecting block 74, a cable force sensor 76, a cable force control structure, an upper suspension point 71, and a lower suspension point 72. In this embodiment, the suspension rod module 70 can be seen as being divided into two parts, one part forming the intermediate suspension rod 73, and the other part being replaced by an extended lower pull rod 72c. During operation, the core load-bearing and replacement area is the intermediate suspension rod 73, and the intermediate suspension rod 73 can be quickly replaced by contacting the connection between the intermediate suspension rod 73 and the lower pull rod 72c.

[0070] When designing, Figure 5 As shown, the intermediate hanger 73 can be made of an epoxy-sprayed parallel steel wire hanger, and a vibration reduction device is set in the steel casing of the hanger. The intermediate hanger 73 adopts a double-layer HDPE sheath and adopts a PVF tape anti-corrosion design. An upper fork ear is arranged at the top of the intermediate hanger 73, and is connected to the upper ear plate 71a at the upper hanging point 71 through an upper pin shaft 71b. The bottom end of the intermediate hanger 73 is a tensioning end, and the bottom end is provided with an external thread section 73a, and is connected to the connecting block 74 through a fastening nut 75. By rotating the matching fastening nut 75, the intermediate hanger 73 can be quickly tensioned. An auxiliary scale 73b is drawn on the middle and lower section of the rod body of the intermediate hanger 73, which is used to record the tensioning condition of the intermediate hanger 73 to speed up the replacement efficiency of the intermediate hanger 73.

[0071] Lower tie rod 72c is a high-strength steel member. Its upper end is equipped with a lifting ring 72a for securing it to a hook 74a on connecting block 74. Its lower end is a forked lug, or lower lug, connected to lower lug plate 72b at lower suspension point 72 via a lower pin 72d. Each set of the present invention includes two lower tie rods 72c.

[0072] The connecting block 74 is a steel member made of high-strength steel. A circular hole is provided in the center for the middle suspension rod 73 to pass through. Two hooks 74a are provided on the side for hooking the lower pull rod 72c. Figure 5 shown.

[0073] Cable force sensor 76, also known as a magnetic flux sensor, is mounted above connecting block 74. It monitors the cable force throughout the boom in real time and assists the corresponding control device in controlling and optimizing the cable force. The cable force control mechanism comprises a fastening nut 75, an externally threaded section 73a, and connecting block 74. Adjusting fastening nut 75 changes the cable force in intermediate boom 73.

[0074] Further, refer to Figure 5-10 As shown, the upper hanging point 71 includes an upper ear plate 71a, an upper pad, an upper stiffening rib, etc., which are fixed to the arch rib A by welding. The lower hanging point 72 includes a lower ear plate 72b, a lower pad, a lower stiffening rib, etc., which are fixed to the bridge deck crossbeam B by welding. Figure 6-7 As shown, the lower hanging point 72 can be processed into different inclination angles according to the outward or inward inclination of the arch rib A, and is consistent with the axis of the middle hanging rod 73.

[0075] By adopting the boom module 70 of the present invention, while maintaining its own installation and replacement functions, multiple maintenance operations can be performed after the boom module 70 is installed and before it is replaced to achieve real-time compensation of the tensile stress at the middle boom 73, prevent stress relaxation problems in the boom module 70, and thus ensure the normal service life of the boom module 70, as follows:

[0076] When performing maintenance on the intermediate boom 73, the cable tension is adjusted by tightening the fastening nut 75. The number of rotations required for the fastening nut 75 is calculated using the following formula:

[0077]

[0078] Where:

[0079] n is the number of rotations required for the fastening nut 75;

[0080] F is the cable force adjustment value, which is obtained by subtracting the current reading of the cable force sensor 76 from the rated cable force value of the intermediate boom 73;

[0081] L is the length of the usable section of the intermediate hanger 73; the usable section of the intermediate hanger 73, that is, the length of the rod body of the intermediate hanger 73 between the top end and the fastening nut 75, that is, the tensile section length of the intermediate hanger 73 during actual work.

[0082] p is the thread pitch of the external thread section 73a at the middle boom 73;

[0083] E is the elastic modulus of the middle suspension rod 73;

[0084] S is the cross-sectional area of ​​the middle suspension rod 73 .

[0085] At this point, the technical advantages of the new boom module 70 are as follows:

[0086] a. The present invention proposes an easily replaceable boom module 70 with a simple structure and convenient installation and replacement. This not only reduces the installation difficulty of the boom module 70 but also enables the rapid replacement of the intermediate boom 73, effectively shortening the time, labor, and equipment required for replacing the boom module 70, reducing the impact of the boom module 70 replacement on urban traffic, and reducing the construction cost of replacing the boom module 70.

[0087] b. The boom module 70 proposed in the present invention has a simple structure, flexible layout, safety and reliability, and its installation and maintenance methods are easy to operate. It can be flexibly installed according to the changes in the cross-section of the arch rib A, and is widely applicable to various special-shaped arch bridge structures. It reduces the difficulty of installing and replacing the special-shaped boom module 70, and reduces the requirements for the site and equipment for the installation and replacement of the special-shaped boom module 70. It helps to solve the problems of difficulty and high replacement cost of the special-shaped boom module 70, reduces the construction risk when replacing the special-shaped boom module 70, and expands the scope of application of such arch bridges.

[0088] c. The hanger module 70 provided by the present invention is easy to install and has low requirements for installation space, which is conducive to installation work in the complex structural system of special-shaped arch bridges. The installation requires less manpower and equipment, and the installation cost is low.

[0089] d. The boom module 70 of the present invention adopts a novel PVF tape anti-corrosion design, which can effectively prevent rainwater and other substances from penetrating into the PE casing, while isolating the HDPE from erosion by ozone and ultraviolet rays, thereby alleviating the problem of stress cracking of the HDPE outer sheath caused by ozone, rainwater, acid and alkali, and ultraviolet rays under high stress and vibration conditions. This greatly improves the durability of the boom module 70 and extends the service life of the boom module 70.

[0090] e. The cable force control structure proposed in the present invention can be used in conjunction with the magnetic flux cable force sensor 76 to monitor the cable force in real time during the use of the arch bridge and to compensate for the cable force in a timely manner when the cable force decreases. The cable force control structure proposed in the present invention is easy to operate. When adjusting the cable force, there is no need to dismantle the arch bridge structure or erect a temporary structure, which does not affect the normal use of the arch bridge. The present invention can easily realize the cable force control of the arch bridge, effectively extend the service life of the hanger module 70, and reduce the cost of arch bridge maintenance.

[0091] f. The boom module 70 of the present invention has a simple and beautiful structure and a unique shape. In addition to the above-mentioned functional advantages, it can also be used as a decoration to increase the beauty and uniqueness of the arch bridge, broadening the application scenarios of steel arch bridges with significant results.

[0092] Of course, it will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, but also encompasses the same or similar structures that can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and it is intended that all variations that fall within the meaning and range of equivalents of the claims be encompassed within the present invention. Any reference signs in the claims should not be construed as limiting the claim to which they relate.

[0093] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0094] The technology, shape, and structure not described in detail in the present invention are all well-known technologies.

Claims

1. An assembled special-shaped boom module replacement device, characterized by: The device comprises an assembled hoop (10) matching the cross-sectional shape of the arch rib, the top end of the temporary sling (20) is fixed to the upper positioning point of the assembled hoop (10) through a universal joint module (30) so as to be angle-adjustable, the bottom end of the temporary sling (20) is fixed to the lower suspension beam (40), and the tensioning of the temporary sling (20) is achieved through a compensating jack (50), and a bridge deck beam is placed above the lower suspension beam (40); The assembled hoop (10) includes corner end sliding blocks located at four corner ends, the upper left corner end sliding block (11) and the upper right corner end sliding block (12) are fixed to each other by upper tension bolts (15), and the lower left corner end sliding block (13) and the lower right corner end sliding block (14) are fixed to each other by lower tension bolts (16); the two ends of the left hinged rod (17) are hinged to the upper left corner end sliding block (11) and the lower left corner end sliding block (13), respectively, and the two ends of the right hinged rod (18) are hinged to the upper right corner end sliding block (12) and the lower right corner end sliding block (14), respectively; the upper tension bolts (15), the lower tension bolts (16), the left hinged rod (17) and the right hinged rod (18) are all provided with positioning plates (19) for fitting the corresponding surfaces of the arch ribs; A group of positioning units is formed by upper tension bolts (15), lower tension bolts (16), left hinge rods (17), right hinge rods (18) and corner end sliding blocks that cooperate with each other. The positioning units are divided into two groups and connected to each other through positioning rods (60) arranged along the length direction of the arch rib; the positioning rods (60) between the two groups of upper right corner end sliding blocks and between the two groups of upper left corner end sliding blocks (11) are respectively rotatably matched with rotating cylinders (31), and mounting holes are radially penetrated at the rotating cylinders (31). The top end of the temporary sling (20) is hinged in the mounting hole through a horizontal hinge shaft (32), and the axis of the horizontal hinge shaft (32) is perpendicular to the axis direction of the rotating cylinder (31); the rotating cylinder (31) and the horizontal hinge shaft (32) are combined to form the universal joint module (30).

2. The assembly-type special-shaped boom module replacement device according to claim 1, characterized in that: The side of the positioning plate (19) facing the arch rib surface is padded with an anti-slip and wear-resistant layer.

3. The assembly-type special-shaped boom module replacement device according to claim 1 or 2, characterized in that: The assembled clamps (10) are in two groups and are arranged in sequence along the length direction of the arch rib. The temporary slings (20) at the two groups of assembled clamps (10) extend downward and are respectively fixed to the two ends of the lower sling beam (40), thereby making the lower sling beam (40) form a bearing platform for the bridge deck crossbeam; the top end of the suspender module (70) is fixed to the arch rib through the upper sling point (71), and the bottom end of the suspender module (70) is fixed to the bridge deck crossbeam through the lower sling point (72). A tensioning jack for providing tensioning force to the suspender module (70) is provided at the bridge deck crossbeam; a cable force sensor (76) for testing the cable force at the suspender module (70) is also arranged on the suspender module (70).

4. The assembly-type special-shaped boom module replacement device according to claim 3, characterized in that: The boom module (70) includes an intermediate boom (73), the top end of the intermediate boom (73) is hinged to the upper hanging point (71), the bottom end of the intermediate boom (73) is sleeved with a connecting block (74), and hooks (74a) are symmetrically arranged on both sides of the connecting block (74), thereby forming a hook-fitting with two groups of symmetrically arranged hanging rings (72a) at the lower hanging point (72), thereby limiting the connecting block (74) from performing an upward movement relative to the lower hanging point (72); a section of the rod body of the intermediate boom (73) extending from the connecting block (74) is provided with an external thread section (73a), and a fastening nut (75) is threadedly fitted at the external thread section (73a), thereby limiting the intermediate boom (73) from performing an upward movement relative to the connecting block (74); and a cable force sensor (76) is arranged on the intermediate boom (73).

5. The assembly-type special-shaped boom module replacement device according to claim 4, characterized in that: The lower suspension point (72) includes a lower ear plate (72b) directly fixed on the bridge deck crossbeam, the bottom of the lower pull rod (72c) is hinged on the lower ear plate (72b), and the top of the lower pull rod (72c) is arranged with the suspension ring (72a); the lower pull rods (72c) are two and are axially symmetrically arranged along the axis of the middle suspension rod (73).

6. The assembly-type special-shaped boom module replacement device according to claim 5, characterized in that: The lower ear plate (72b) comprises a bottom plate and a vertical plate arranged on the bottom plate, the vertical plate and the bottom plate intersecting with each other; the vertical plate constitutes a hinge plate for hingedly connecting the lower pull rod (72c), and the two are hingedly connected to each other via a lower pin shaft (72d).

7. The assembly-type special-shaped boom module replacement device according to claim 6, characterized in that: The upper hanging point (71) includes an upper ear plate (71a) directly fixed on the arch rib, and a fork ear is coaxially installed on the top end of the intermediate hanging rod (73). The fork ear and the upper ear plate (71a) are plugged into each other and hinged to each other through an upper pin shaft (71b).

8. The assembly-type special-shaped boom module replacement device according to claim 4, characterized in that: When performing maintenance on the intermediate boom (73), the cable force is adjusted by tightening the fastening nut (75). The number of rotations required for the fastening nut (75) is calculated by the following formula: ； Where: n The number of revolutions required to tighten the nut (75); F is the cable force adjustment value, which is obtained by subtracting the current cable force sensor (76) reading from the rated cable force value of the intermediate boom (73); L is the available length of the intermediate boom (73); p is the thread pitch of the external thread section (73a) at the middle boom (73); E is the elastic modulus of the middle suspension rod (73); S is the cross-sectional area of ​​the middle suspension rod (73).

9. A replacement method, wherein the replacement method uses the assembly type special-shaped boom module replacement device as claimed in claim 1, characterized in that The following steps are involved: S1. Installing the assembled hoop (10) on the arch rib at the location of the boom module (70) to be replaced, adjusting the assembled hoop (10) so that its shape fits the cross section of the arch rib, and then fastening it by tension bolts; S2, installing a lower sling beam (40) below the bridge deck crossbeam, then installing a temporary sling (20), adjusting the length of the temporary sling (20) to tighten the bridge deck crossbeam, and ensuring that each temporary sling (20) is evenly stressed; S3. Install the compensating jack (50) below the lower hanging beam (40), connect the compensating jack (50) to the hydraulic pump station through the hydraulic pipe, and check the connection safety and stable load-bearing capacity of each component; S4, installing a static level and a cable force sensor (76) around the boom module (70) to be replaced and the adjacent boom modules (70); S5, cutting the steel wire of the old boom module (70) step by step, controlling the compensating jack (50) to tension synchronously step by step, adjusting the elevation change value of each control point to be within the design requirement range, and realizing the conversion of the cable force of the old boom module (70) to the assembled special-shaped boom module replacement device; S6, installing a new boom module (70) and tensioning it using a tensioning jack, while controlling the compensating jack to retract the cylinder step by step, so as to transfer the cable force at the assembled special-shaped boom module replacement device to the new boom module (70), and anchoring the new boom module (70) after tensioning it into place; S7, dismantle the assembled special-shaped boom module replacement device and move to the next boom module (70) that needs to be replaced, and repeat the above steps to complete the replacement of other boom modules.

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