Anchorage system for a bridge deck crane and method of manufacture and installation

Abstract

This invention discloses an anchor point system for bridge deck cranes and its manufacturing and installation method, relating to the field of bridge construction technology, to solve the problems of low construction efficiency and material waste in bridge deck crane construction. The bridge deck crane anchor point system includes an upper anchor point assembly, a lower clamping assembly, and at least one set of first fasteners. The upper anchor point assembly includes two opposing lifting lugs, with a connecting gap between the two lugs to accommodate the bridge deck crane's anchoring rod. The lugs have connecting holes for inserting pins, and are used for detachable connection with the bridge deck crane's anchoring rod. The upper anchor point assembly and the lower clamping assembly are respectively positioned above and below the anchored beam segment, and are clamped and fixed to the anchored beam segment by the detachable first fasteners. The bridge deck crane anchor point system and its manufacturing and installation method provided by this invention enable the detachable and reusable use of the anchor point system, improving stress safety and construction efficiency, and reducing material waste.

Description

Technical Field

[0001] This invention relates to the field of bridge construction technology, and in particular to an anchor point system for bridge deck cranes and its manufacturing and installation method. Background Technology

[0002] With the vigorous development of road transportation infrastructure construction in my country, cable-stayed bridges are increasingly widely used in bridge construction due to their outstanding span capacity and excellent wind and earthquake resistance. The installation and positioning of steel box girders for cable-stayed bridges are typically achieved using bridge deck cranes. The rear anchor point of the bridge deck crane is a key component, its main function being to securely anchor the crane to the installed girder segment of the cable-stayed bridge, ensuring stability and safety during lifting operations. Existing bridge deck crane rear anchor points typically employ a welded connection method, that is, directly fixing the anchoring structure to the girder segment through welding.

[0003] However, the existing structure has the following shortcomings: First, the bridge crane needs to be moved and re-anchored multiple times during construction. When anchoring by welding, each movement requires cutting and re-welding, resulting in a large workload and low construction efficiency. Second, repeated cutting and welding will cause thermal damage to the material properties of the crane structural components and beam segments, resulting in welding residual stress and embrittlement of the heat-affected zone, which will affect structural safety. Third, the welded structure is for single use only and cannot be recycled after dismantling, resulting in serious material waste. Summary of the Invention

[0004] The purpose of this invention is to provide an anchor point system for bridge deck cranes and a method for manufacturing and installing it, so as to realize the detachable and reusable use of the anchor point system, improve stress safety and construction efficiency, and reduce material waste.

[0005] To achieve the above objectives, in a first aspect, the present invention provides an anchoring system for a bridge deck crane, comprising an upper anchoring assembly, a lower clamping assembly, and at least one set of detachable first fasteners. The upper anchoring assembly abuts against the upper surface of the anchored beam segment. The upper anchoring assembly includes two opposing lifting lugs, with a connecting gap between the two lugs for accommodating the bridge deck crane's anchoring rod. The lugs have connecting holes for inserting pins, and are detachably connected to the bridge deck crane's anchoring rod. The lower clamping assembly abuts against the lower surface of the anchored beam segment. The upper anchoring assembly and the lower clamping assembly are respectively positioned above and below the anchored beam segment and are clamped and fixed to the anchored beam segment by at least one set of detachable first fasteners.

[0006] Furthermore, the upper anchor point assembly also includes an anchor point pad, with a lifting lug plate disposed on the upper side of the anchor point pad and fixedly connected to it. The anchor point pad is used to abut against the upper surface of the anchored beam segment.

[0007] Furthermore, an anchor reinforcement plate is provided at the location of the connecting hole in the lug plate. The connecting hole passes through the lug plate and the anchor reinforcement plate, and the anchor reinforcement plate is fixedly connected to the lug plate (e.g., by welding). By providing the anchor reinforcement plate, the wall thickness around the connecting hole is increased, effectively improving the hole wall's resistance to compression and tearing, and preventing the hole wall from deforming or fatigued due to long-term action of the pin.

[0008] Furthermore, the upper anchor point assembly also includes a lifting lug stiffening plate, which is disposed between two lifting lug plates and is fixedly connected to the two lifting lug plates and the anchor point pad respectively.

[0009] Furthermore, the upper anchor point assembly also includes an anchor point stiffening plate, which is disposed on the outside of the lifting lug plate and is fixedly connected to a lifting lug plate and an anchor point pad.

[0010] Furthermore, the lower clamping assembly includes a horizontally arranged clamping plate cover, a clamping plate web plate vertically fixedly connected to the lower surface of the clamping plate cover, and a clamping plate stiffening plate fixedly connected between the clamping plate web plate and the clamping plate cover.

[0011] Furthermore, the bridge deck crane anchoring system also includes a leveling component, which is disposed between the upper anchoring component and the anchored beam segment, and / or between the lower clamping component and the anchored beam segment, to adapt to the surface slope of the anchored beam segment.

[0012] Furthermore, the leveling assembly includes a first leveling plate and a second leveling plate. The first leveling plate is disposed between the upper anchoring assembly and the top plate of the anchored beam segment, and the second leveling plate is disposed between the top plate of the anchored beam segment and the lower clamping assembly. Both the first and second leveling plates have inclined surfaces that match the cross slope angle of the bridge deck.

[0013] Furthermore, the aforementioned anchored beam segment includes a beam face and a beam web; the aforementioned bridge deck crane anchor point system includes a second fastener and at least two lower clamping assemblies, wherein the two lower clamping assemblies are respectively disposed on both sides of the beam web; the second fastener is used to detachably connect the two lower clamping assemblies to the beam web.

[0014] Furthermore, the first fastener is a high-strength bolt group, and the contact surfaces of the upper anchor point assembly and the anchored beam segment, as well as the contact surfaces of the lower clamping assembly and the anchored beam segment, are all provided with anti-slip coatings.

[0015] As can be seen from the above, the anchor point system for bridge cranes provided in this application has the following beneficial effects: 1. Reliable and safe stress distribution: This invention employs two oppositely arranged lifting lug plates to form a double-lifting-lug structure. A connecting gap is formed between the two lifting lug plates to accommodate the anchoring rod of the bridge deck crane. Connecting holes for inserting pins are provided on the lifting lug plates. When the anchoring rod of the bridge deck crane is inserted between the two lifting lug plates and connected by the pin, it achieves dual-point stress distribution, dispersing the concentrated load borne by the traditional single lifting lug to the two lifting lug plates, effectively reducing stress concentration and significantly improving the safety factor of the anchoring system.

[0016] 2. Detachable and reusable, avoiding welding damage: This invention places the upper anchor point assembly and the lower clamping assembly above and below the anchored beam segment, respectively, and clamps them to the anchored beam segment using at least one set of detachable first fasteners. The entire anchoring system can be installed and disassembled without any welding operations, avoiding thermal damage and residual stress to the crane structure and beam segment caused by repeated cutting and welding; at the same time, the anchor point system can be completely removed and reused for other beam segments after use, greatly reducing material waste and lowering construction costs.

[0017] 3. Clamping Anchorage for Stable Structure: This invention uses an upper anchoring component to abut against the upper surface of the anchored beam segment, and a lower clamping component to abut against the lower surface. A detachable first fastener clamps both components together, forming a unified clamping structure with opposing tensions. This clamping method ensures a tight connection between the anchoring system and the beam segment, reliably transmitting the tensile and shear forces generated during hoisting. It also avoids any permanent modifications to the beam segment other than drilling, offering strong versatility.

[0018] Secondly, this application also provides a method for assembling the above-mentioned anchor point system for a bridge deck crane, comprising the following steps: S1. Processing to form the upper anchor point assembly and the lower clamping assembly; S2. Drill bolt holes at the preset positions of the anchored beam segment; S3. The lower clamping assembly, the anchored beam segment and the upper anchor point assembly are stacked in sequence and fixed by bolting with the first fastener. S4. Insert the anchoring rod of the bridge crane between the two lifting lugs and complete the anchoring by inserting the pin into the connecting hole.

[0019] Furthermore, in step S1 of the above manufacturing and installation method, the material is cut with a machining allowance reserved for the connecting hole of the lifting lug plate, the assembly gap between the lifting lug plate and the anchor pad is welded with a full penetration fillet weld, the stiffening plate is assembled and welded after passing non-destructive testing, and the connecting hole is precision machined to the design size using a CNC boring machine; when processing to form the lower clamping assembly, the clamping plate cover plate and the clamping plate web plate are welded with a bevel fillet weld.

[0020] Furthermore, in step S3, the tightening of the high-strength bolt during bolting is divided into initial tightening and final tightening, with the initial tightening torque being 50% of the final tightening torque.

[0021] The manufacturing and installation methods of the bridge deck crane anchor point system described above have the same technical effect as the aforementioned bridge deck crane anchor point system, and will not be repeated here. Attached Figure Description

[0022] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this invention, illustrate exemplary embodiments of the invention and are used to explain the invention, but do not constitute an undue limitation of the invention. In the drawings: Figure 1 This is a front view of an anchor point system for a bridge deck crane provided in an embodiment of the present invention; Figure 2 for Figure 1 A side view of the bridge deck crane anchorage system shown. Figure 3 A front view of an upper anchor point assembly provided in an embodiment of the present invention; Figure 4 for Figure 3 Side view of the upper anchor point assembly shown; Figure 5 A front view of a lower clamping assembly provided in an embodiment of the present invention; Figure 6 for Figure 5 Side view of the lower clamping assembly shown; Figure 7 A flowchart illustrating the manufacturing and installation method of an anchor point system for a bridge deck crane, provided in an embodiment of the present invention; Figure 8 for Figure 7 The diagram shows a detailed flowchart of the manufacturing and installation method for the anchor point system used in the bridge deck crane.

[0023] Figure label: 1-Upper anchor point assembly; 11-Lifting lug plate; 12-Connecting hole; 13-Connecting gap; 14-Anchor point pad; 15-Anchor point reinforcing plate; 16-Lifting lug stiffening plate; 17-Anchor point stiffening plate; 2-Lower clamping assembly; 21-Clamping plate cover plate; 22-Clamping plate web; 23-Clamping plate stiffening plate; 3-Leveling assembly; 31-First leveling plate; 32-Second leveling plate; 4-First fastener; 5-Anchored beam segment; 51-Beam panel; 52-Beam web; 6-Second fastener. Detailed Implementation

[0024] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0025] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0026] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified. "Several" means one or more, unless otherwise explicitly specified.

[0027] In the description of this invention, it should be understood that the terms "upper" and "lower" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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. Therefore, they should not be construed as limiting this invention.

[0028] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral connection; it can refer to a direct connection or an indirect connection through an intermediate medium; it can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0029] With the vigorous development of road transportation infrastructure construction in my country, cable-stayed bridges are increasingly widely used in bridge construction due to their outstanding span capacity and excellent wind and earthquake resistance. The installation and positioning of steel box girders for cable-stayed bridges are typically achieved using bridge deck cranes. The rear anchor point of the bridge deck crane is a key component, its main function being to securely anchor the crane to the installed girder segment of the cable-stayed bridge, ensuring stability and safety during lifting operations. Existing bridge deck crane rear anchor points typically employ a welded connection method, that is, directly fixing the anchoring structure to the girder segment through welding.

[0030] However, the existing structure has the following shortcomings: First, the bridge crane needs to be moved and re-anchored multiple times during construction. When anchoring by welding, each movement requires cutting and re-welding, resulting in a large workload and low construction efficiency. Second, repeated cutting and welding will cause thermal damage to the material properties of the crane structural components and beam segments, resulting in welding residual stress and embrittlement of the heat-affected zone, which will affect structural safety. Third, the welded structure is for single use only and cannot be recycled after dismantling, resulting in serious material waste.

[0031] To solve the above problems, such as Figures 1 to 6 As shown, this embodiment of the invention provides an anchoring system for a bridge deck crane, including an upper anchoring assembly 1, a lower clamping assembly 2, and a first fastener 4. The upper anchoring assembly 1 abuts against the upper surface of the anchored beam segment 5. The upper anchoring assembly 1 includes two opposing lifting lugs 11, with a connecting gap 13 between the two lugs 11 to accommodate the bridge deck crane's anchoring rod. The lugs 11 have connecting holes 12 for inserting pins, and are detachably connected to the bridge deck crane's anchoring rod. The lower clamping assembly 2 abuts against the lower surface of the anchored beam segment 5. The upper anchoring assembly 1 and the lower clamping assembly 2 are respectively positioned above and below the anchored beam segment 5, and are clamped and fixed to the anchored beam segment 5 by at least one set of detachable first fasteners 4.

[0032] During operation, the lower clamping assembly 2 is placed below the anchored beam segment 5, and the upper anchor point assembly 1 is placed above the anchored beam segment 5. The two are then clamped and fixed together using the first fastener 4. Next, the anchoring connecting rod of the bridge crane is inserted into the connection gap 13 between the two lifting lug plates 11, and a pin is inserted into the connection hole 12 to achieve a detachable connection between the bridge crane and the anchor point system. During hoisting, the tensile force is transmitted through the double lifting lug plates 11 to the first fastener 4, and then to the anchored beam segment 5. The lower clamping assembly 2 provides a reverse clamping force, allowing the entire anchoring system to resist external loads through clamping force.

[0033] Through the above structure and working process, this embodiment uses two oppositely arranged lifting lug plates 11 to form a double lifting lug structure. A connecting gap 13 is formed between the two lifting lug plates 11 to accommodate the anchoring rod of the bridge deck crane. The lifting lug plates 11 are provided with connecting holes 12 for inserting pins. When the anchoring rod of the bridge deck crane is inserted between the two lifting lug plates 11 and connected by the pin, it achieves dual-point force distribution, dispersing the concentrated load borne by the traditional single lifting lug to the two lifting lug plates 11, effectively reducing stress concentration and significantly improving the safety factor of the anchoring system. At the same time, in this embodiment, the upper anchor point assembly 1 and the lower clamping assembly 2 are respectively set above and below the anchored beam segment 5, and clamped and fixed to the anchored beam segment 5 by at least one set of detachable first fasteners 4. The entire anchoring system can be installed and disassembled without any welding operations, avoiding material thermal damage and residual stress caused by repeated cutting and welding to the crane structure and beam segment; at the same time, after the anchor point system is used up, it can be completely removed and reused for other beam segments, greatly reducing material waste and lowering construction costs. Furthermore, in this embodiment, the upper anchor point assembly 1 abuts against the upper surface of the anchored beam segment 5, and the lower clamping assembly 2 abuts against the lower surface. The two are then clamped and fixed using a detachable first fastener 4, forming an overall clamping structure with opposing pulls. This clamping method ensures a tight connection between the anchoring system and the beam segment, reliably transmitting the tensile and shear forces generated during hoisting. It also avoids any permanent modifications to the beam segment other than drilling, making it highly versatile.

[0034] Furthermore, such as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the upper anchor point assembly 1 also includes an anchor point pad 14. A lifting lug plate 11 is disposed on the upper side of the anchor point pad 14 and fixedly connected to it. The anchor point pad 14 is used to abut against the upper surface of the anchored beam segment 5. By setting the anchor point pad 14, the contact area between the upper anchor point assembly 1 and the upper surface of the anchored beam segment 5 is increased, the pressure is distributed, and excessive local compressive stress is avoided to prevent damage to the top plate of the beam segment.

[0035] Furthermore, an anchor point reinforcing plate 15 is provided at the location of the connecting hole 12 on the lug plate 11. The connecting hole 12 passes through the lug plate 11 and the anchor point reinforcing plate 15, and the anchor point reinforcing plate 15 is fixedly connected to the lug plate 11 (e.g., by welding). By providing the anchor point reinforcing plate 15, the wall thickness around the connecting hole 12 is increased, effectively improving the hole wall's resistance to compression and tearing, and preventing the hole wall from deforming or fatigued due to long-term action of the pin.

[0036] Furthermore, the stiffening plate 16 is disposed between the two lug plates 11 and is fixedly connected to the two lug plates 11 and the anchor pad 14 respectively. The stiffening plate 16, which is symmetrically disposed between the two lug plates, significantly improves the overall lateral stiffness of the double lug structure, prevents the lug plates from buckling laterally when subjected to eccentric loads, and connects the two lug plates into one unit, making the stress distribution more uniform.

[0037] Furthermore, the anchor stiffening plate 17 is disposed on the outer side of the lug plate 11 and is fixedly connected to one lug plate 11 and the anchor pad 14. The anchor stiffening plate 17 forms a triangular support on the outer side of the lug plate, which further enhances the bending resistance of the root of the individual lug plate, reduces welding deformation, and improves the overall dimensional accuracy and load-bearing capacity of the upper anchor assembly.

[0038] Furthermore, such as Figure 1 , Figure 2 , Figure 5 and Figure 6 As shown, the lower clamping assembly 2 includes a horizontally arranged clamping cover plate 21, a clamping web plate 22 vertically fixedly connected to the lower surface of the clamping cover plate 21, and a clamping stiffening plate 23 fixedly connected between the clamping web plate 22 and the clamping cover plate 21. The clamping cover plate 21 has a large contact area with the lower surface of the anchored beam segment 5, providing a reliable bearing surface and avoiding local damage to the bottom plate of the beam segment; the clamping web plate 22 forms a section with high bending stiffness, reliably reversing the clamping force to the lower surface of the beam segment; the clamping stiffening plate 23 prevents the web plate from becoming unstable and enhances the overall integrity.

[0039] Furthermore, the bridge deck crane anchoring system also includes a leveling component 3, which is disposed between the upper anchoring component 1 and the anchored beam segment 5, and / or between the lower clamping component 2 and the anchored beam segment 5, to adapt to the surface slope of the anchored beam segment 5. Exemplarily, the leveling component 3 is disposed between the upper anchoring component 1 and the anchored beam segment 5; or between the lower clamping component 2 and the anchored beam segment 5; or, the leveling component 3 is disposed between the upper anchoring component 1 and the anchored beam segment 5, and also between the lower clamping component 2 and the anchored beam segment 5. The leveling component 3 can compensate for the tilt caused by the bridge deck cross slope, ensuring that the upper anchoring component 1 and the lower clamping component 2 remain horizontal after installation, ensuring that the lifting lug 11 is subjected to vertical force, and avoiding the generation of additional bending moment.

[0040] Furthermore, such as Figure 1As shown, the leveling component 3 includes a first leveling plate 31 and a second leveling plate 32. The first leveling plate 31 is positioned between the upper anchor point component 1 and the top plate of the anchored beam segment 5, while the second leveling plate 32 is positioned between the top plate of the anchored beam segment 5 and the lower clamping component 2. Both the first leveling plate 31 and the second leveling plate 32 have inclined surfaces that match the cross slope angle of the bridge deck. By having the upper and lower inclined surfaces correspond to the cross slope angle of the bridge deck, the anchor point pad 14 and the clamping plate cover 21 remain horizontal after installation, ensuring that the upper and lower clamping surfaces are horizontally aligned and guaranteeing uniform force distribution.

[0041] Furthermore, the first fastener 4 is a high-strength bolt assembly. The contact surfaces of the upper anchor point assembly 1 and the anchored beam segment 5, as well as the contact surfaces of the lower clamping assembly 2 and the anchored beam segment 5, are all coated with an anti-slip coating. The high-strength bolt assembly provides a stable and controllable preload, and the anti-slip coating significantly increases the coefficient of friction, allowing the anchoring connection to primarily rely on friction to transmit horizontal loads, reducing the shear force borne by the bolts, preventing slippage, and also providing rust prevention and extending service life.

[0042] Furthermore, such as Figure 2 and Figure 6 As shown, the anchored beam segment 5 includes a beam face 51 and a beam web 52; the anchor point system for the bridge crane includes a second fastener 6 and at least two lower clamping assemblies 2, wherein the two lower clamping assemblies 2 are respectively disposed on both sides of the beam web 52; the second fastener 6 is used to detachably connect the two lower clamping assemblies 2 to the beam web 52. By symmetrically clamping the two lower clamping assemblies 2 on both sides of the beam web 52 and using the second fastener 6 to penetrate the beam web 52 for lateral fastening, a bidirectional clamping of the beam web 52 is formed, which significantly enhances the shear resistance and overall stability between the anchor point system and the anchored beam segment 5, preventing lateral slippage during hoisting; at the same time, the second fastener 6 fixes the lower clamping assemblies 2 to the beam web 52, allowing the load to be directly transmitted through the beam web, optimizing the force transmission path. Throughout the entire operation, no welding work is required; the anchor point system and the beam web 52 of the anchored beam segment 5 can be firmly connected only by the second fastener 6. After hoisting is completed, the second fastener 6 is removed, and the anchor point system can be disassembled as a whole and reused in other beam segments, realizing detachable and recyclable use.

[0043] Furthermore, in this embodiment, the lifting lug plate 11 and the anchor point pad 14 are connected by a full penetration fillet weld, and an assembly gap is reserved during the assembly of the lifting lug plate 11 and the anchor point pad 14. The full penetration fillet weld ensures the connection strength, and the reserved assembly gap facilitates the full penetration welding operation and avoids welding defects.

[0044] In this embodiment, the connecting holes 12 on the two lifting lugs 11 are coaxially arranged with a coaxiality of no more than 2mm. The diameter of the connecting holes 12 is configured to have a clearance fit with the inserted pin. The high-precision coaxiality ensures smooth insertion of the pin and uniform force distribution, while the clearance fit avoids jamming and local overload.

[0045] In this embodiment, the clamping plate cover plate 21 and the clamping plate web plate 22 are connected by a bevel fillet weld, and the weld surface is flush with the lower surface of the clamping plate cover plate 21. The flush weld surface ensures the tight fit between the clamping plate cover plate 21 and the lower surface of the anchored beam segment 5, avoiding stress concentration caused by local point contact.

[0046] In this embodiment, the materials of the lifting lug plate 11, anchor point pad plate 14, anchor point reinforcing plate 15, lifting lug stiffening plate 16, anchor point stiffening plate 17, clamping plate cover plate 21, clamping plate web plate 22, and clamping plate stiffening plate 23 can be Q420qD steel, Q420qE steel, etc., and the plate thickness can be 15mm-35mm. For example, the plate thickness can be 15mm, 18mm, 20mm, 22mm, 24mm, 26mm, 28mm, 30mm, 32mm, 35mm, etc. High-strength bridge structural steel is selected to ensure structural safety under heavy load conditions, while also achieving standardized production.

[0047] This embodiment also provides a manufacturing and installation method for assembling the above-mentioned anchor point system for bridge deck cranes, such as... Figure 7 and Figure 8 As shown, it includes the following steps: Step S1: Process the upper anchor point assembly and the lower clamping assembly.

[0048] Step S1 includes: S101: Processing to form the upper anchor point assembly.

[0049] Specifically, according to the preset dimensions, the connecting holes of the lifting lug plate are pre-machined to allow for machining allowance. After assembling and welding the lifting lug plate and the anchor point reinforcing plate, the connecting holes are precision machined to the theoretical value plus 1mm. This allowance avoids the impact of welding deformation on the hole position accuracy. For example, a CNC boring machine can be used for precision machining to ensure hole diameter accuracy and coaxiality requirements. An assembly gap (e.g., 5mm-15mm; for example, assembly gaps are 5mm, 6mm, 8mm, 10mm, 12mm, 15mm, etc.) is reserved between the lifting lug plate and the anchor point pad. Full penetration fillet welds are used for welding, and after passing non-destructive testing, the lifting lug stiffening plate and the anchor point stiffening plate are assembled and welded. The reserved gap facilitates full penetration welding, and non-destructive testing ensures the internal quality of the weld, preventing structural failure due to welding defects.

[0050] S102: Processing to form the lower clamping assembly.

[0051] Specifically, the clamping plate cover plate and the clamping plate web plate are welded using bevel fillet welds, and the weld surface is controlled to be flush with the lower surface of the clamping plate cover plate. The flush weld ensures the tight fit between the clamping plate cover plate and the lower surface of the anchored beam segment, improving the efficiency of frictional force transmission. At the same time, clamping plate stiffening plates are welded between the clamping plate web plate and the clamping plate cover plate to enhance the overall rigidity of the lower clamping assembly.

[0052] Step S2: Drill bolt holes at the preset positions of the anchored beam segment.

[0053] Specifically, step S2 includes: S201. Drill bolt holes at predetermined positions on the beam face and web of the anchored beam segment. The bolt holes on the beam face are for inserting the first fastener, and the bolt holes on the beam web are for inserting the second fastener.

[0054] S202. After drilling the bolt holes, remove rust from the bolt hole group and contact surfaces and apply an anti-slip coating (such as inorganic zinc-rich paint). Rust removal and application of the anti-slip coating improve the coefficient of friction and corrosion resistance of the contact surfaces.

[0055] S203. Two lower clamping assemblies are respectively installed on both sides of the web of the anchored beam segment, aligning the holes on the clamping plate web with the holes on the beam web. Then, the second fastener is inserted and tightened, detachably fixing the two lower clamping assemblies to the beam web. By symmetrically clamping the two lower clamping assemblies on both sides of the beam web and using the second fastener to penetrate the beam web for lateral fastening, a bidirectional clamping of the beam web is formed, significantly enhancing the shear resistance and overall stability between the anchoring system and the anchored beam segment, preventing lateral slippage during hoisting. Simultaneously, the second fastener fixes the lower clamping assemblies to the beam web, allowing the load to be directly transmitted through the web, optimizing the force transmission path. Throughout the entire process, no welding is required; the anchoring system and the beam web of the anchored beam segment are securely connected solely by the second fastener. After hoisting, the second fastener can be removed, allowing the anchoring system to be disassembled and reused for other beam segments, achieving detachable and reusable operation.

[0056] Step S3: Stack the lower clamping assembly, the anchored beam segment, and the upper anchor point assembly in sequence, and fix them by bolting with the first fastener.

[0057] Specifically, step S3 includes: placing the lower clamping assembly below the anchored beam segment and the upper anchor point assembly above the anchored beam segment, so that the anchor point pad abuts against the upper surface of the beam panel and the clamping plate cover abuts against the lower surface of the beam panel. Then, the first fastener (which can be a high-strength bolt group) is inserted and tightened. For example, during bolted fixing, the tightening of the high-strength bolt is divided into initial tightening and final tightening. The initial tightening torque is 50% of the final tightening torque, and a torque testing wrench is used for testing after final tightening. Step-by-step tightening ensures uniform and accurate preload, and torque testing ensures connection reliability.

[0058] Step S4: Insert the anchoring rod of the bridge crane between the two lifting lugs, and complete the anchoring by inserting the pin into the connecting hole.

[0059] By separating the manufacturing and installation of the anchor point system using the above method, only drilling, overlapping, and bolting are required on site, without welding, which greatly improves construction efficiency.

[0060] In the description of the above embodiments, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0061] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. An anchorage point system for a deck crane, characterized in that include: The upper anchor point assembly is used to abut against the upper surface of the anchored beam segment. The upper anchor point assembly includes two oppositely arranged lifting lugs, and a connecting gap is formed between the two lifting lugs to accommodate the anchoring rod. The lifting lugs are provided with connecting holes for passing through pins. The lifting lugs are used for detachable connection with the anchoring rod of the bridge deck crane. The lower clamping assembly is used to abut against the lower surface of the anchored beam segment; The upper anchor point assembly and the lower clamping assembly are respectively disposed above and below the anchored beam segment, and are clamped and fixed to the anchored beam segment by at least one set of detachable first fasteners.

2. The anchorage point system for a deck crane according to claim 1, characterized in that The upper anchor point assembly also includes an anchor point pad, and the lifting lug plate is disposed on the upper side of the anchor point pad and fixedly connected to the anchor point pad. The anchor point pad is used to abut against the upper surface of the anchored beam segment.

3. The anchorage point system for a deck crane according to claim 2, characterized in that An anchor reinforcement plate is provided at the location where the connection hole is made on the lifting lug plate. The connection hole passes through the lifting lug plate and the anchor reinforcement plate, and the anchor reinforcement plate is fixedly connected to the lifting lug plate.

4. The anchorage system for a deck crane according to claim 2, characterized in that The upper anchor point assembly also includes a lifting lug stiffening plate, which is disposed between the two lifting lug plates and is fixedly connected to the two lifting lug plates and the anchor point pad respectively.

5. The anchorage system for a deck crane according to claim 2, characterized in that The upper anchor point assembly also includes an anchor point stiffening plate, which is disposed on the outside of the lifting lug plate and is fixedly connected to one of the lifting lug plates and the anchor point pad.

6. The anchorage system for a deck crane according to claim 1, characterized in that The lower clamping assembly includes a horizontally arranged clamping plate cover, a clamping plate web plate vertically fixed to the lower surface of the clamping plate cover, and a clamping plate stiffening plate fixedly connected between the clamping plate web plate and the clamping plate cover.

7. The anchorage point system for a deck crane according to claim 1, characterized in that It also includes a leveling component, which is disposed between the upper anchor point component and the anchored beam segment, and / or between the lower clamping component and the anchored beam segment, for adapting to the surface slope of the anchored beam segment.

8. The anchor point system for bridge deck cranes according to claim 7, characterized in that, The leveling assembly includes a first leveling plate and a second leveling plate. The first leveling plate is disposed between the upper anchor point assembly and the top plate of the anchored beam segment, and the second leveling plate is disposed between the top plate of the anchored beam segment and the lower clamping assembly. Both the first leveling plate and the second leveling plate have inclined surfaces that match the cross slope angle of the bridge deck.

9. The anchor point system for bridge deck cranes according to claim 1, characterized in that, The anchored beam segment includes the beam face plate and the beam web; The bridge deck crane anchor point system includes a second fastener and at least two lower clamping assemblies, wherein the two lower clamping assemblies are respectively disposed on both sides of the beam web; the second fastener is used to detachably connect the two lower clamping assemblies to the beam web.

10. A method for manufacturing and installing an anchor point system for a bridge deck crane as described in any one of claims 1 to 9, characterized in that, Includes the following steps: The upper anchor point assembly and the lower clamping assembly are formed through processing; Drill bolt holes at predetermined positions on the anchored beam segment; The lower clamping assembly, the anchored beam segment, and the upper anchor point assembly are stacked in sequence and fixed by bolting with the first fastener; The anchoring rod of the bridge crane is inserted between the two lifting lugs, and anchoring is completed by inserting a pin into the connecting hole.

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