Overwater construction erecting mechanism for large-span suspension bridge stiffening beam

Abstract

The utility model relates to a large-span suspension bridge stiffening beam overwater construction erecting mechanism, and belongs to the technical field of bridge construction. The construction erection mechanism comprises a travelling crane, wherein the travelling crane comprises a crane body and an extending section connected to the crane body; the lifting mechanism is connected to the extending section and comprises a clamping piece used for being connected with a sling and an upper cross beam connected to the clamping piece, and the upper cross beam is connected with a sling used for lifting the stiffening beam to be erected through a pulley block and a steel wire rope. According to the overwater construction erecting mechanism for the large-span suspension bridge stiffening beam, efficient and safe erecting of the stiffening beam is achieved through the moving function of the traveling crane and the lifting function of the lifting mechanism, and the overwater construction erecting mechanism can be widely applied to erecting of an overwater suspension bridge main beam. Compared with a traditional method for erecting by using a cable crane, the method has the advantages of being lighter, more economical, convenient to use, mount and dismount and the like.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of bridge construction technology, in particular to a large-span suspension bridge stiffening girder water construction erecting mechanism. BACKGROUND

[0002] At present, the suspension bridge becomes the first choice of the large-span bridge type due to its large span capacity, good anti-seismic capacity, beautiful appearance, economical cost and other advantages.

[0003] The modern suspension bridge is generally a flexible suspension system composed of a foundation, an anchorage, a main tower, a main cable, a sling and a stiffening girder. The stiffening girder of the suspension bridge is generally a rigid beam, and part of the small-span suspension bridge can adopt a concrete beam structure, and the large-span suspension bridge mainly adopts a steel truss beam and a steel box beam structure. The erecting mode of the stiffening girder is affected by the terrain. For the mountainous suspension bridge, the cable crane is generally used to erect the stiffening girder at the fixed point, and for the water suspension bridge, the cable crane or the bridge crane is generally used to vertically erect the stiffening girder.

[0004] For the large-span suspension bridge constructed on the water, as the span is larger and larger, the diameter of the main cable is thicker and thicker, and even develops to the double main cable structure, the stiffening girder segment is also heavier and heavier, so that the structure of the cable crane or the bridge crane is complicated, the rated lifting weight is larger, and the construction risk is higher. At the same time, the cable crane or the bridge crane has high cost, poor usability, and is very difficult to install and remove in the high altitude. Therefore, it is necessary to design a more economical and flexible stiffening girder erecting mechanism to facilitate the erection of the stiffening girder of the suspension bridge and reduce the construction cost and risk. SUMMARY

[0005] The embodiment of the present application provides a large-span suspension bridge stiffening girder water construction erecting mechanism to solve the problems of large construction difficulty and inconvenient operation in the related art.

[0006] The embodiment of the present application provides a large-span suspension bridge stiffening girder water construction erecting mechanism, which comprises:

[0007] The trolley comprises a trolley body and an extension section connected to the trolley body;

[0008] The lifting mechanism is connected to the extension section and comprises a clamping piece for connecting the sling, an upper cross beam connected to the clamping piece, and a lifting tool for lifting the stiffening girder to be erected connected to the upper cross beam through the pulley block and the steel wire rope.

[0009] In some embodiments, the trolley comprises a roller fixed to the bottom of the trolley body.

[0010] In some embodiments, a winch for lifting and lowering the lifting mechanism is arranged on the trolley.

[0011] In some embodiments, the trolley includes a hydraulic rod connected to one end of the extension section for extending or retracting the extension section.

[0012] In some embodiments, the clamping member includes a fixing plate and bolts disposed on the fixing plate.

[0013] In some embodiments, the upper crossbeam is rotatably connected to the extended section.

[0014] In some embodiments, both the upper crossbeam and the lifting device are steel box girders.

[0015] In some embodiments, a counterweight is provided at the end of the vehicle body.

[0016] In some embodiments, the vehicle body includes a plurality of interconnected triangular truss structures.

[0017] The beneficial effects of the technical solution provided in this application include:

[0018] This application provides a construction and erection mechanism for a stiffening girder of a long-span suspension bridge on water. The construction and erection mechanism of this application includes a traveling crane, which includes a body and an extended section connected to the body; and a lifting mechanism connected to the extended section, which includes a clamp for connecting slings and an upper crossbeam connected to the clamp. The upper crossbeam is connected to a lifting device for lifting the stiffening girder to be erected via a pulley block and a wire rope.

[0019] In practical use, after the first stiffening girder section is erected, the overhead crane can travel along the existing stiffening girder. The crane body is the foundation of the crane, set on the existing stiffening girder to provide stable support and positioning, ensuring that the crane can move and adjust on it, and has a certain cantilever crossing capacity, enabling it to send the lifting mechanism to the position of the slings of the girder section to be erected. The extension section is connected to one end of the crane body, forming a telescopic and rotatable structure. The extension section increases the working range of the crane, allowing it to reach more distant areas. By adjusting the length or angle of the extension section, it can adapt to the erection requirements of stiffening girders at different positions and angles. Furthermore, the lifting mechanism is connected to the extension section, and the clamping parts of the lifting mechanism are used to fix and connect the slings, ensuring that they will not fall off or loosen during the lifting process. The upper crossbeam is connected above the clamping parts, forming the main support structure of the lifting mechanism. By winding and unwinding the wire rope, the lifting device and the stiffening girder to be erected can be raised and lowered. The lifting device is connected to the end of the wire rope and is used to directly lift the stiffening girder to be erected. During the lifting process, the lifting device bears the weight of the stiffening girder and safely raises it to the designed position. The gantry crane and the lifting mechanism together constitute an efficient and flexible stiffening girder erection system. This application's large-span suspension bridge stiffening girder erection mechanism for waterborne construction achieves efficient and safe erection of the stiffening girder through the movement of the gantry crane and the lifting function of the lifting mechanism, and can be widely applied to the erection of main beams of waterborne suspension bridges. Unlike traditional methods using cable-mounted cranes, this patented method has advantages such as being lighter, more economical, and easier to reuse, install, and disassemble. Attached Figure Description

[0020] 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.

[0021] Figure 1 This is a front view of the first stiffening beam segment during erection, provided in an embodiment of this application.

[0022] Figure 2 for Figure 1 Side view;

[0023] Figure 3 A front view of one construction step during the erection of the first stiffening girder segment;

[0024] Figure 4 for Figure 3 Side view;

[0025] Figure 5 This is the front view after the first stiffening girder segment has been erected;

[0026] Figure 6 for Figure 5 Side view;

[0027] Figure 7 This is a schematic diagram showing the transportation of the stiffening beam to be erected.

[0028] Figure 8 This is a schematic diagram showing the connection between the stiffening beam and the lifting mechanism to be erected.

[0029] Figure 9 A schematic diagram illustrating the use of a lifting mechanism to lift the stiffening beam to be erected;

[0030] Figure 10 This is a schematic diagram showing the process after the stiffening beam has been erected and the lifting is completed.

[0031] Figure 11 This is a schematic diagram showing the completed erection of the stiffening beam.

[0032] Figure 12 A schematic diagram of the traveling and lifting mechanisms;

[0033] Figure 13 A schematic diagram of the traveling and lifting mechanisms;

[0034] Figure 14 for Figure 12 Side view of the crane and lifting mechanism during the erection of the stiffening beam at point AA;

[0035] Figure 15 for Figure 12 A top view of the crane and lifting mechanism during the erection of the stiffening beam at point AA.

[0036] Figure 16 for Figure 12 Side view of the crane and lifting mechanism in their normal operating state at point AA;

[0037] Figure 17 for Figure 12 Top view of the crane and lifting mechanism in their normal operating state at point AA;

[0038] Figure 18 for Figure 12 Side view of the vehicle at point BB (mid-section);

[0039] Figure 19 for Figure 12 Side view of the crane and counterweight at point C;

[0040] Figure label:

[0041] 1. First section stiffening girder; 2. Main cable; 3. Lifting sling; 4. Lifting mechanism; 5. Crane; 11. Stiffening girder already erected; 12. Stiffening girder to be erected; 41. Upper crossbeam; 42. Lifting device; 43. Clamping device; 44. Pulley block; 45. Wire rope; 51. Vehicle body; 52. Roller; 53. Counterweight; 54. Winch; 55. Extension section. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0043] This application provides a mechanism for the construction and erection of stiffening girders for long-span suspension bridges on water, which can solve the problems of high construction difficulty and inconvenient operation in related technologies when constructing and erecting stiffening girders on water.

[0044] See Figures 7 to 11 As shown in the embodiment of this application, a mechanism for erecting a stiffening girder of a long-span suspension bridge on water is provided, including a traveling trolley 5, which includes a body 51 and an extension section 55 connected to the body 51; a lifting mechanism 4, which is connected to the extension section 55, and includes a clamping member 43 for connecting the sling 3, an upper crossbeam 41 connected to the clamping member 43, and a lifting device 42 for lifting the stiffening girder 12 to be erected connected to the upper crossbeam 41 by a pulley block 44 and a wire rope 45.

[0045] In actual use, after the first stiffening beam 1 is erected, the gantry crane 5 can travel along the stiffening beam. The crane body 51 is the basic part of the gantry crane 5, which is set on the stiffening beam to provide stable support and positioning, ensuring that the gantry crane 5 can move and adjust on it, and has a certain cantilever crossing capacity, enabling it to send the lifting mechanism 4 to the position of the sling 3 of the beam segment to be erected. The extension section 55 is connected to one end of the crane body 51, forming a telescopic and rotatable structure. The extension section 55 can increase the working range of the gantry crane 5, allowing it to reach more distant areas. By adjusting the length or angle of the extension section 55, it can adapt to the erection requirements of stiffening beams at different positions and angles. Furthermore, the lifting mechanism 4 is connected to the extension section 55, and the clamping part 43 of the lifting mechanism 4 is used to fix and connect the sling 3, ensuring that it will not fall off or loosen during the lifting process. The upper crossbeam 41 is connected above the clamping part 43, forming the main support structure of the lifting mechanism 4. The lifting device 42 and the stiffening beam 12 to be erected can be raised and lowered by extending and retracting the wire rope 45. The lifting device 42 is connected to the end of the wire rope 45 and is used to directly lift the stiffening beam 12 to be erected. During the lifting process, the lifting device 42 bears the weight of the stiffening beam and safely lifts it to the designed position. The traveling crane 5 and the lifting mechanism 4 together constitute an efficient and flexible stiffening beam erection system. The large-span suspension bridge stiffening beam erection mechanism of this application achieves efficient and safe erection of the stiffening beam through the movement of the traveling crane 5 and the lifting function of the lifting mechanism 4, and can be widely applied to the erection of the main beam of the suspension bridge on water. Unlike the traditional method of erection using cable-mounted cranes, this patented method has the advantages of being lighter, more economical, and easier to reuse, install, and disassemble.

[0046] In use, the upper crossbeam 41 not only provides sufficient strength and rigidity to support the weight of the lifting device 42 and the stiffening beam 12 to be erected, but also serves as a fixing point for the pulley block 44 and the wire rope 45. The pulley block 44 is installed on the upper crossbeam 41 and connected to the lifting device 42 via the wire rope 45. The main function of the pulley block 44 is to change the direction of the wire rope 45 and reduce the friction between the wire rope 45 and the upper crossbeam 41. It allows the wire rope 45 to move smoothly during the lifting process, thereby improving lifting efficiency and reducing wear, and also saving effort. The wire rope 45 passes through the pulley block 44, with one end connected to the lifting device 42 and the other end connected to the winch 54 or other power source. The wire rope 45 is the core component of the lifting mechanism 4; it bears the entire weight of the lifting device 42 and the stiffening beam 12 to be erected and transmits this weight to the winch 54.

[0047] In practical use, the erection mechanism of this application can be symmetrically set up in two sets, which facilitates simultaneous underwater erection from both ends of the erected stiffening beam 11, and helps to improve construction efficiency.

[0048] In some alternative embodiments, such as Figure 18 andFigure 19 As shown, the traveling crane 5 includes rollers 52 fixed to the bottom of the vehicle body 51. In practical use, the rollers 52 allow the traveling crane 5 to move on the added bridge surface, increasing its flexibility and applicability. The vehicle body 51, as the foundation of the traveling crane 5, ensures the stability and load-bearing capacity of the entire structure.

[0049] In some alternative embodiments, such as Figure 12 and Figure 13 As shown, a winch 54 for lifting and lowering the lifting mechanism 4 is connected to the overhead crane 5. The winch 54 on the overhead crane 5 enhances its lifting and transporting capabilities, enabling the overhead crane 5 to perform more complex tasks.

[0050] In some alternative embodiments, such as Figures 14 to 17 As shown, the traveling crane 5 includes a hydraulic rod connected to one end of the extension section 55 for extending or retracting the extension section 55. The hydraulic rod controls the extension or retraction of the extension section 55. Extending the extension section 55 increases the working range of the traveling crane 5, while retraction reduces its space occupation. As a power source, the hydraulic rod can precisely control the movement of the extension section 55, achieving precise positioning and operation. In actual use, the extension of the hydraulic rod abuts against the end of the extension section 55, causing the extension section 55 to retract, thereby retracting the lifting mechanism 4. When it is necessary to lift the stiffening beam 12 to be erected, retracting the hydraulic rod allows the extension section 55 to extend relative to the body 51 of the traveling crane 5, thereby allowing the lifting mechanism 4 to extend.

[0051] In some alternative embodiments, the clamping member 43 includes a fixing plate and bolts disposed on the fixing plate. The clamping member 43 is used to clamp the sling 3, thereby connecting and fixing the construction erection mechanism to the sling 3. The clamping member 43 includes a fixing plate and bolts disposed on the fixing plate. The clamping member 43 is used to secure the clamped object. The fixing plate provides a stable support surface, while the bolts generate clamping force by tightening, firmly fixing the object to the clamping member 43. This design allows the clamping member 43 to be adapted to slings 3 of different shapes and sizes, providing wide applicability.

[0052] In some alternative embodiments, the upper crossbeam 41 is rotatably connected to the extension section 55. The upper crossbeam 41 is connected to the extension section 55 via a rotatable connection, allowing the upper crossbeam 41 to rotate or swing relative to the extension section 55 within a certain range. This rotatable connection design allows the upper crossbeam 41 and its connected lifting device 42 to adapt more flexibly to different operational needs. For example, when it is necessary to adjust the lifting angle or avoid obstacles, this can be achieved by rotating the upper crossbeam 41. This increases the flexibility and operational efficiency of the entire lifting system. Furthermore, this rotatable connection also facilitates the retraction and extension of the lifting mechanism 4, preventing interference with other components.

[0053] In some alternative embodiments, both the upper crossbeam 41 and the lifting device 42 are steel box girders. The upper crossbeam 41, as the load-bearing structure of the lifting mechanism 4, must be designed to meet the requirements of load-bearing capacity and stability. The lifting device 42, as the component that directly connects to and lifts the stiffening beam 12 to be erected, also needs a sufficiently robust structure. In this embodiment, both the upper crossbeam 41 and the lifting device 42 adopt a steel box girder structure. Steel box girders have advantages such as high load-bearing capacity, light weight, and good wind resistance, making them very suitable for use in the construction and erection of such large bridges. The steel box girder structure allows the upper crossbeam 41 and the lifting device 42 to withstand enormous loads, ensuring that they do not deform or break during the lifting process. The relatively light weight of the steel box girder helps reduce the overall weight of the erection mechanism, lowering construction difficulty and risk. The good wind resistance of the steel box girder allows it to maintain structural stability under adverse weather conditions, ensuring safe construction.

[0054] In some alternative embodiments, such as Figure 19 As shown, a counterweight 53 is provided at the end of the vehicle body 51. The vehicle body 51 is the main body of the traveling crane 5, providing stable support and a moving platform. The counterweight 53 is connected to the end of the vehicle body 51 to balance the weight of the entire traveling crane 5, ensuring its stability during movement. The counterweight 53 increases the weight at the end of the vehicle body 51, thereby reducing the risk of swaying and tilting of the traveling crane 5 during movement. In practical use, by reasonably setting the weight and position of the counterweight 53, the stability of the traveling crane 5 can be further optimized, and construction safety can be improved.

[0055] In some alternative embodiments, the vehicle body 51 includes multiple interconnected triangular truss structures to reduce its weight. The vehicle body 51 is composed of multiple interconnected triangular truss structures. Each triangular truss structure consists of three or more members, forming a stable triangular structure. These triangular truss structures are connected together by nodes to form a stable overall support structure. The triangular truss structure has good stability and load-bearing capacity, capable of withstanding loads from all directions. The connection of multiple triangular truss structures further enhances the overall stability and load-bearing capacity of the vehicle body 51. This structural design allows the vehicle body 51 to adapt to various complex construction environments and conditions, ensuring the stability and safety of the vehicle body 5 during movement.

[0056] In practice, the following construction and erection method can be adopted, utilizing the aforementioned large-span suspension bridge stiffening girder waterborne construction and erection mechanism, including the following steps:

[0057] S1. Erect the first stiffening beam 1 and transport the stiffening beam 12 to be erected to the location directly below the design position;

[0058] S2. Using the crane 5 to move along the erected stiffening beam 11, the lifting mechanism 4 is sent to the design position, the extension section 55 extends, and the clamping part 43 of the lifting mechanism 4 is fixed to the sling 3 of the beam section to be erected.

[0059] S3. Start the winch 54 to lower the wire rope 45, lower the lifting device 42 of the lifting mechanism 4 to the beam surface of the stiffening beam 12 to be erected, and connect and fix the lifting device 42 to the stiffening beam 12 to be erected.

[0060] S4. Start the winch 54 to retract the wire rope 45, which will drive the stiffening beam 12 to be erected to rise. After the stiffening beam 12 is raised to the target position, fix the stiffening beam 12 to be erected to the sling 3.

[0061] S5. Release the clamping part 43 of the lifting mechanism 4, retract the extension section 55, and erect the next stiffening beam segment.

[0062] In practical use, firstly, the stiffening beam to be erected is transported directly below its designed position. Next, the overhead crane 5 is smoothly moved along the erected stiffening beam until the lifting mechanism 4 is precisely delivered to the predetermined design position. At this point, the extension section 55 extends to securely fix the clamping member 43 of the lifting mechanism 4 to the sling 3.

[0063] Subsequently, as Figures 8 to 11As shown, the winch 54 is started, and the lifting device 42 of the lifting mechanism 4 is slowly lowered onto the beam surface of the stiffening beam 12 to be erected by lowering the wire rope 45. After ensuring that the lifting device 42 is stably connected and fixed to the stiffening beam 12 to be erected, the winch 54 is started again, and the stiffening beam 12 to be erected is smoothly lifted by retracting the wire rope 45.

[0064] After the stiffening beam 12 is lifted to the target position, it is immediately precisely adjusted and fixed to ensure a stable connection with the sling 3, thus completing the entire erection process.

[0065] In step 1, as Figures 1 to 6 As shown, when erecting the first stiffening girder segment 1, after completing the construction of the main cable 2 and suspenders 3, the first stiffening girder segment 1, lifting mechanism 4, and gantry crane 5 are first assembled at the assembly site. The gantry crane 5 is placed on the first stiffening girder segment 1, and the lifting device 42 of the lifting mechanism 4 is fixed to the first stiffening girder segment 1. Then, it is transported to directly below the bridge site by barge. Finally, fixed pulleys are installed on the cable clamps of the suspenders 3, and a set of temporary steel wire ropes 45 are threaded through them. First, the upper structure of the lifting mechanism 4, including the upper crossbeam 41, clamping device 43, pulley block 44, etc., is lifted to the position of the suspenders 3 using the temporary steel wire ropes 45. Then, the clamping device 43 is clamped and fixed to the suspenders 3. Finally, the first stiffening girder segment 1 is lifted using the steel wire rope 45 between the upper and lower parts of the lifting mechanism 4.

[0066] After the first stiffening beam 1 is lifted into place, the sling 3 is first fixed to the first stiffening beam 1, then the lifting mechanism 4 is fixed to the crane 5 through the extension section 55 of the crane 5, and finally the crane 5 moves forward to transport the lifting mechanism 4 to the position of the next set of sling 3.

[0067] After the first stiffening girder 1 is erected, in step 1, when the stiffening girder 12 to be erected is transported to the position directly below the design location, a barge can be used for transportation. At this time, the lifting mechanism 4 is fixed to the trolley 5, and the trolley 5 is located on the surface of the erected stiffening girder 11.

[0068] 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.

[0069] 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.

[0070] 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 mechanism for erecting a stiffening girder of a long-span suspension bridge over water, characterized in that: include: The vehicle (5) includes a body (51) and an extension (55) connected to the body (51); The lifting mechanism (4) is connected to the extension section (55) and includes a clamp (43) for connecting the sling (3) and an upper crossbeam (41) connected to the clamp (43). The upper crossbeam (41) is connected to a lifting device (42) for lifting the stiffening beam (12) to be erected via a pulley block (44) and a wire rope (45).

2. The underwater construction and erection mechanism for a stiffening girder of a long-span suspension bridge as described in claim 1, characterized in that: The vehicle (5) includes rollers (52) fixed to the bottom of the vehicle body (51).

3. The underwater construction and erection mechanism for a stiffening girder of a long-span suspension bridge as described in claim 1, characterized in that: The crane (5) is connected to a winch (54) for lifting and lowering the lifting mechanism (4).

4. The underwater construction and erection mechanism for a stiffening girder of a long-span suspension bridge as described in claim 3, characterized in that: The traveling mechanism (5) includes a hydraulic rod connected to one end of the extension section (55) for extending or retracting the extension section (55).

5. The underwater construction and erection mechanism for a stiffening girder of a long-span suspension bridge as described in claim 1, characterized in that: The clamping member (43) includes a fixing plate and bolts disposed on the fixing plate.

6. The underwater construction and erection mechanism for a stiffening girder of a long-span suspension bridge as described in claim 1, characterized in that: The upper crossbeam (41) is rotatably connected to the extended section (55).

7. The underwater construction and erection mechanism for a stiffening girder of a long-span suspension bridge as described in claim 1, characterized in that: Both the upper crossbeam (41) and the lifting device (42) are steel box girders.

8. The underwater construction and erection mechanism for a stiffening girder of a long-span suspension bridge as described in claim 1, characterized in that: A counterweight (53) is provided at the end of the vehicle body (51).

9. The underwater construction and erection mechanism for a stiffening girder of a long-span suspension bridge as described in claim 1, characterized in that: The vehicle body (51) includes multiple connected triangular truss structures.

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