A cantilever casting and cantilever erection combined crane for a steel-concrete hybrid variable cross-section continuous box girder bridge with the function of adjusting the linear shape

Abstract

The present invention discloses a combined casting and erection crane for a steel-concrete hybrid variable cross-section continuous box girder bridge with the function of adjusting the linear shape, which relates to the field of cranes and includes a support frame. When in the casting state, the support frame is used to support the hanging basket, and when in the erection state, the support frame is used to support the suspended beam; a stabilizing component is connected to the support frame, and the stabilizing component includes a stabilizing outer frame and a stabilizing inner frame. The stabilizing inner frame is rotatably connected to the rear anchor point, and the stabilizing outer frame can move on the stabilizing inner frame; when in the casting state, the stabilizing outer frame and the stabilizing inner frame are horizontally arranged, and the movement of the stabilizing outer frame on the stabilizing inner frame can drive the support frame to move; when in the erection state. The stabilizing outer frame and the stabilizing inner frame are used to fix the support frame and drive the support frame to move during casting, and are used to support the suspended beam through the stay cables during erection. Together with the suspended beam built on the support frame, the removal of the support frame and the erection of another stay cable support are omitted, reducing the construction period and making the construction faster.

Description

Technical Field

[0001] The present invention relates to the field of cranes, and particularly to a combined suspension and erection crane for a steel-concrete hybrid variable cross-section continuous box girder bridge with the function of adjusting the linear shape. Background Art

[0002] A steel-concrete hybrid beam is a structural system in which a concrete beam and a steel beam are connected into an integral whole at a reasonable longitudinal position by a connection section. Variable cross-section beam: A larger cross-section is adopted at the location with larger bending moment, and a smaller cross-section is adopted at the location with smaller bending moment. Such a beam with a cross-section varying along the axis is called a variable cross-section beam.

[0003] Concrete beam bridges have been widely used in the field of bridge engineering due to their advantages such as simple structure, convenient construction, low cost, and low later maintenance cost. However, due to their self-weight, the spanning ability of concrete beam bridges is limited. At present, the largest-span prestressed concrete continuous beam bridge in China is the Xuanshuituo Minjiang River Bridge with a main span of 180m, and the largest-span prestressed concrete continuous rigid frame bridge in China is the Humen Auxiliary Channel Bridge with a main span of 270m. In order to further improve the spanning ability of concrete beam bridges, bridge engineers have proposed a steel-concrete hybrid variable cross-section continuous box girder bridge in which the concrete in the mid-span part of the variable cross-section concrete beam bridge is replaced by steel structure, which can increase the span of the concrete beam bridge to more than 300m.

[0004] For the construction of the steel main girder in the mid-span of a long-span variable cross-section hybrid continuous box girder bridge, large-section integral hoisting can be adopted, or small-section suspension erection can be adopted. When using the small-section suspension erection method to construct a long-span variable cross-section hybrid continuous box girder bridge, the concrete main girder part usually adopts the conventional hanging basket cantilever casting, and the deck crane is used to suspend and erect the steel beam segments in the mid-span. The process of the hanging basket cantilever casting of the concrete beam segment is to anchor the rear anchor point of the hanging basket on the completed beam segment, use the front end of the hanging basket as a support to support the formwork, bind steel bars, arrange prestressed ducts, pour concrete, and tension prestress in the hanging basket to complete the construction of a standard beam segment; after the concrete strength reaches the design value, move the hanging basket forward by one section and then start the construction of the next section. The process of the deck crane suspending and erecting the steel beam segment is to anchor the deck crane on the completed beam segment, use the hoisting equipment at the front end of the deck crane to lift the steel beam segment to the installation position at the end of the constructed bridge, and complete the beam segment erection after precise positioning and alignment and welding; after the erection of the steel beam segment is completed, move the deck crane forward by one section and then start the erection of the next section of the steel beam.

[0005] Chinese patent application CN113931068A discloses a bridge crane for installing steel and concrete composite beams and a beam erection method thereof, which is installed on a bridge body provided with a sling, and includes a mobile mobilization component, a main truss, a hanger, a bottom bracket, a walking anchor component, and a sliding frame. The mobile mobilization component includes a longitudinal bridge vehicle component, a transverse overhead crane component, and a hoist. The main truss is provided with a locking end locked to the bridge body and an extended end connected to the locking end; the end of the extended end is connected to the bottom bracket through a hanger, and the sliding frame is provided with a three-way jack for adjusting the position of the beam section. The mobile mobilization component, the main truss, the hanger, the bottom bracket, the walking anchor component, and the sliding frame are used to transport the beam section components to be erected, effectively solving the transportation problem of beam sections under special working conditions such as inconvenient transportation under the bridge and the inability of water construction equipment to provide effective services. The method is suitable for the installation of steel and concrete composite beams of bridges under various construction conditions, has a wider adaptability, and solves the problem of inconvenient installation.

[0006] The above patents and prior art also have the following defects:

[0007] When pouring concrete on a steel-concrete hybrid beam in a suspended concrete section of a bridge, it is necessary to use suspended pouring equipment and a hanging basket for suspended pouring construction. After pouring a section of concrete, the suspended pouring equipment needs to be moved forward. Because large vehicles cannot be used for towing on the bridge, hydraulic cylinders are often used in conjunction with anchor points for towing or pushing in the existing technology. The forward movement amount is small and the forward movement speed is slow. After the construction of the suspended concrete section of the bridge is completed, when it is necessary to assemble the steel structure box beam, the suspended pouring equipment needs to be dismantled and the suspended assembly crane needs to be assembled. This is relatively time-consuming and leads to a long construction period. In addition, the suspended assembly crane is subjected to large forces when lifting the steel structure box beam, and high requirements are placed on the installation stability. When assembling the crossbeam across the steel structure bridge section, the suspended assembly crane is moved upward to facilitate changing the lifting position. A cable is required to fix the crossbeam. However, there are few bridges with cable-stayed fixed positions in the existing technology, and the application scenarios are limited. Installing a cable-stayed fixing device will further increase the construction period, resulting in a significant extension of the construction period. Therefore, the present application provides a combined crane for cantilever casting and cantilever assembly of a steel-concrete variable-section continuous box girder bridge with the function of adjusting the linear shape to meet the needs. Summary of the Invention

[0008] The purpose of the present application is to provide a combined crane for suspended casting and suspended assembly of a steel-concrete variable-section continuous box girder bridge with a linear adjustment function. The stable outer frame and the stable inner frame are used to fix the support frame and drive the support frame to move during suspended casting, and are used to support the suspended beam through the inclined steel cable during suspended assembly. In conjunction with the suspended beam built on the support frame, the need for dismantling the support frame and building another inclined cable support is eliminated, thereby reducing construction period and making construction faster.

[0009] To achieve the above object, the present application provides the following technical solution: A cantilever casting and cantilever erection combined crane for a steel-concrete hybrid variable cross-section continuous box girder bridge with the function of adjusting the linear shape, including a support frame, which is used to support the hanging basket in the cantilever casting state and is used to support the suspended beam in the cantilever erection state; a stabilizing component is connected to the support frame;

[0010] The stabilizing component includes a stabilizing outer frame and a stabilizing inner frame. The stabilizing inner frame is rotatably connected to the rear anchor point, and the stabilizing outer frame can move on the stabilizing inner frame; when the stabilizing component is in the cantilever casting state, the stabilizing outer frame and the stabilizing inner frame are horizontally arranged, and the movement of the stabilizing outer frame on the stabilizing inner frame can drive the support frame to move; when the stabilizing component is in the cantilever erection state, the stabilizing inner frame and the stabilizing outer frame can rotate to the vertical on the rear anchor point;

[0011] When the stabilizing component is in the cantilever erection state, the suspended beam can be connected to the stabilizing outer frame through a stay cable;

[0012] A cantilever erection winch is arranged on the suspended beam, and a hanging basket is connected to the support frame through a cantilever casting cable.

[0013] Preferably, the rear anchor point includes a rear anchor plate and a rear anchor frame. One end of the top of the stabilizing inner frame is fixedly installed with a rotating rod, and the rotating rod is rotatably connected to the rear anchor frame. A main anchor point is arranged on the side of the rear anchor point away from the support frame. The main anchor point includes a fixed cable and a fixed winch, and the fixed winch can rotate the stabilizing inner frame and the stabilizing outer frame from horizontal to vertical through the fixed cable.

[0014] Preferably, the main anchor point further includes a fixed frame. The fixed winch is fixedly installed on the fixed frame. One end of the fixed cable is connected to the fixed winch, and the other end of the fixed cable is fixedly installed on the stabilizing outer frame.

[0015] Preferably, a driving auxiliary component is arranged on the fixed frame. The driving auxiliary component includes a driving motor, a reducer, a driving sprocket, a driven sprocket and a chain. The driving motor is fixedly installed in the fixed frame. The output end of the driving motor is connected to the input end of the reducer. The driving sprocket is fixedly installed at the output end of the reducer. The driven sprocket is fixedly installed at one end of the rotating rod, and the chain is connected between the driving sprocket and the driven sprocket.

[0016] Preferably, a fixed frame is installed on the fixed frame, and a fixed wheel is fixedly installed on the fixed frame. When the stabilizing component is in the cantilever casting state, the fixed cable abuts against the fixed wheel.

[0017] Preferably, a support assembly is provided inside the fixed frame. The support assembly includes a support frame. When the support assembly is in the cantilever casting state, the support frame is located on one side of the stable inner frame and abuts against the stable inner frame. When the support assembly is in the segmental erection state, the support frame is located at the bottom of the stable inner frame and abuts against the stable inner frame.

[0018] Preferably, the support assembly further includes a hydraulic drive rod. One end of the hydraulic drive rod is fixedly installed inside the fixed frame, and the output end of the hydraulic drive rod is fixedly installed on the support frame. Support sliders are fixedly installed on both sides of the fixed frame, and support chutes are provided on the inner walls of both sides of the fixed frame. The two support sliders are respectively slidably connected in the corresponding support chutes.

[0019] Preferably, the stable outer frame is sleeved on the stable inner frame. Plain sliders are fixedly installed at the four corners of the stable inner frame. A drive assembly is connected between the stable outer frame and the stable inner frame. The drive assembly includes an extension winch, a retraction winch, a drive steel cable, a first deflection pulley and a second deflection pulley. The extension winch is fixedly installed on the stable inner frame, the retraction winch is fixedly installed on the stable outer frame, one end of the drive steel cable is connected to the extension winch, the other end of the drive steel cable is connected to the retraction winch, the first deflection pulley is rotatably connected to the stable outer frame, a connecting plate is fixedly installed on the stable outer frame, the second deflection pulley is rotatably connected to the connecting plate, the drive steel cable is wound around the first deflection pulley and the second deflection pulley, and the drive steel cable passes through the connecting plate and is slidably engaged with the connecting plate.

[0020] Preferably, a moving slide rail is provided at the bottom of the support frame. Sliding assemblies are installed on both the support frame and the rear anchor plate. The sliding assembly includes a sliding plate, a sliding block and two sliding wheels. The sliding plate provided on the support frame is fixedly installed at the bottom of the support frame, the sliding plate provided on the rear anchor plate is fixedly installed at the bottom of the rear anchor plate, the sliding block is fixedly installed at the bottom of the sliding plate, and the sliding plate is slidably engaged in the moving slide rail. The sliding wheels are rotatably connected to the bottom of the sliding plate, and the two sliding wheels are respectively located on both sides of the moving slide rail.

[0021] Preferably, a bearing rod is fixedly installed at the bottom of the stable outer frame. A matching groove is provided at the bottom of the bearing rod corresponding to the position of the moving slide rail. A first mounting plate is fixedly installed on the stable outer frame, and a second mounting plate is fixedly installed on the stable inner frame. When the stable component is in the cantilever erection state, the first mounting plate is located at the position corresponding to the second mounting plate. Mounting holes are provided on both the first mounting plate and the second mounting plate. A first connection hole is provided on the support frame, and a second connection hole is provided on the stable inner frame. When the support component is in the cantilever erection state, the second connection hole corresponds to the first connection hole. A fixing column is connected to the connecting plate, and a plurality of fixing grooves are provided on the fixing column. When the stable component is in the cantilever erection state, one end of the stay cable is fixedly installed in the fixing groove. A hanging basket is connected to the support frame through a cast-in-place cable.

[0022] In summary, the technical effects and advantages of the present invention are as follows:

[0023] 1. In the present invention, during the concrete section construction of the bridge, the hanging basket is suspended by the support frame for cast-in-place construction. After a section of the concrete bridge section is constructed, the stable outer frame moves horizontally on the stable inner frame, and the stable outer frame drives the support frame to move a certain distance. The force on the support frame is transferred to the stable outer frame and the stable inner frame, which can conveniently drive the support frame to move forward more conveniently, make the support frame more stable, and have a better support effect. During the construction of the steel structure box girder of the bridge, the stable outer frame and the stable inner frame are rotated to be vertical. By building a suspension beam on the support frame, one end of the stay cable is fixed on the stable outer frame, and the other end is fixed on the suspension beam, so that the cantilever erection winch can conveniently move on the suspension beam, which is convenient for suspension. At the same time, the stay cable makes the suspension beam more stable, not easy to shake, and has a stronger bearing capacity. The stable outer frame and the stable inner frame are used to fix the support frame and drive the support frame to move during cast-in-place construction, and are used to support the suspension beam through the stay cable during cantilever erection. Cooperating with the suspension beam built on the support frame, the removal of the support frame and the construction of another stay cable support are omitted, the construction period is reduced, the construction is faster, and it can prevent the linear shape of the steel beam cantilever erection segment from not meeting the design requirements due to the small stiffness of the steel beam itself and the fact that the steel beam is located near the mid-span of the bridge, and the steel beam will deform downward under the action of the deck crane. The linear shape and internal stress of the steel beam end can be adjusted by setting the stay cable;

[0024] 2. In the present invention, the fixed frame is anchored on the shore or the already constructed bridge near the shore, and it has a stronger bearing capacity. During the cantilever erection construction of the bridge, the fixed cable tightens the stable outer frame, making the stable outer frame more stable when it is vertical, and the stable outer frame has a stronger bearing capacity. Moreover, the fixed cable and the stay cable are located on both sides of the stable outer frame, so that part of the lateral force of the stable outer frame exerted by the stay cable can be transferred to the main anchor point through the fixed cable, reducing the force on the stable outer frame, and the support for the suspension beam can be increased through the main anchor point, making the suspension beam more stable;

[0025] 3. In the present invention, during the cantilever casting construction of the bridge, the stable inner frame and the stable outer frame are horizontal. The fixed steel cable fixed on the stable outer frame abuts against the fixed wheel, so that the stable outer frame is fixed by the fixed steel cable. The fixed steel cable transmits the torque received by the stable outer frame to the fixed frame, further ensuring the stable force and strong load-bearing capacity of the support frame.

[0026] 4. In the present invention, when the lengths of the stable outer frame and the stable inner frame are not sufficient to complete the construction of the bridge concrete section, the front anchor plate is anchored on the already constructed bridge section, the rear anchor plate is de-anchored, and the driving steel cable is wound by the retracting winch. The driving steel cable drives the stable inner frame to move. The stable inner frame moves into the stable outer frame, so that the large section of the stable inner frame moves forward. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0028] Figure 1 Structural schematic diagram of the stable component, main anchor point, rear anchor point and support frame in the present invention;

[0029] Figure 2 Structural schematic diagram of the stable component and support frame in the present invention;

[0030] Figure 3 For the present invention Figure 2 Enlarged view of part A in;

[0031] Figure 4 Structural schematic diagram of the support frame, stable inner frame and stable outer frame in the present invention;

[0032] Figure 5 For the present invention Figure 4 Enlarged view of part B in;

[0033] Figure 6 Structural schematic diagram of the main anchor point and support frame in the present invention;

[0034] Figure 7 For the present invention Figure 6 Enlarged view of part C in;

[0035] Figure 8 Structural schematic diagram of the fixed steel cable and fixed wheel in the present invention;

[0036] Figure 9 For the present invention Figure 8 Enlarged view of part D in;

[0037] Figure 10 For the present invention Figure 8 An enlarged view of part E in the present invention;

[0038] Figure 11 It is a schematic diagram of the cantilever casting state of a cantilever casting and erection combined crane for a steel-concrete hybrid variable cross-section continuous box girder bridge with the function of adjusting the linear shape;

[0039] Figure 12 It is a schematic diagram of the erection state of a cantilever casting and erection combined crane for a steel-concrete hybrid variable cross-section continuous box girder bridge with the function of adjusting the linear shape.

[0040] In the figure: 1. Support frame; 2. Suspension basket; 3. Suspension beam; 4. Stabilizing component; 41. Stabilizing outer frame; 42. Stabilizing inner frame; 5. Driving component; 51. Extension winch; 52. Retraction winch; 53. Driving steel cable; 54. First deflection pulley; 55. Second deflection pulley; 6. Rear anchor point; 61. Rear anchor plate; 62. Rear anchor frame; 7. Main anchor point; 71. Fixed steel cable; 72. Fixed winch; 73. Fixed frame; 8. Driving auxiliary component; 81. Driving motor; 82. Reducer; 83. Driving sprocket; 84. Driven sprocket; 85. Chain; 91. Support frame; 92. Hydraulic driving rod; 10. Erection winch; 11. Rotating rod; 12. Stay cable; 13. Fixed frame; 14. Fixed wheel; 15. Support slider; 16. Support chute; 17. Moving slide rail; 18. Slide plate; 19. Slide block; 20. Slide wheel; 21. Bearing rod; 22. First mounting plate; 23. Second mounting plate; 24. Fixed column; 25. Front anchor plate. Detailed implementation manners

[0041] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0042] Embodiment: Refer to Figures 1 - 12 A cantilever casting and erection combined crane for a steel-concrete hybrid variable cross-section continuous box girder bridge with the function of adjusting the linear shape as shown, including a support frame 1. When in the cantilever casting state, the support frame 1 is used to support the suspension basket 2. When in the erection state, the support frame 1 is used to support the suspension beam 3; A stabilizing component 4 is connected to the support frame 1;

[0043] The stabilizing assembly 4 includes a stabilizing outer frame 41 and a stabilizing inner frame 42. The stabilizing inner frame 42 is rotatably connected to the rear anchor point 6, and the stabilizing outer frame 41 can move on the stabilizing inner frame 42. When the stabilizing assembly 4 is in the cantilever casting state, the stabilizing outer frame 41 and the stabilizing inner frame 42 are horizontally arranged, and the movement of the stabilizing outer frame 41 on the stabilizing inner frame 42 can drive the support frame 1 to move. When the stabilizing assembly 4 is in the segmental erection state, the stabilizing inner frame 42 and the stabilizing outer frame 41 can rotate to the vertical on the rear anchor point 6.

[0044] When the stabilizing assembly 4 is in the segmental erection state, the suspension beam 3 can be connected to the stabilizing outer frame 41 through the stay cables 12.

[0045] A segmental erection winch 10 is provided on the suspension beam 3, and a hanging basket 2 is connected to the support frame 1 through the cantilever casting cables.

[0046] During the cantilever casting construction of the bridge, the support frame 1 is fixedly installed on the stabilizing outer frame 41, the rear anchor point 6 is anchored to the already constructed concrete bridge section, one end of the support frame 1 extends out of the last already constructed bridge section to form a cantilever, the hanging basket 2 is suspended on the support frame 1, a mold cavity is formed at the end of the last already constructed section in the hanging basket 2, steel bars, stress cables and other skeletons are arranged in the hanging basket 2, and then concrete is cast in situ in the hanging basket 2. After a concrete bridge section is constructed, after the cantilever casting is completed, it is necessary to move the support frame 1 forward a certain distance so that the support frame 1 extends out of the bridge section again to form a cantilever for the cantilever casting of the next bridge section. When it is necessary to move the support frame 1, the stabilizing outer frame 41 moves on the stabilizing inner frame 42, and the stabilizing outer frame 41 drives the support frame 1 to move a certain distance so that the support frame 1 can move continuously. After the concrete section of the bridge is constructed, it is necessary to erect the steel structure box girder by segmental erection. The fixation between the stabilizing outer frame 41 and the support frame 1 is released, the suspension beam 3 is erected on the support frame 1, and the stabilizing outer frame 41 is rotated to the vertical by rotating the stabilizing inner frame 42. The stabilizing outer frame 41 moves to the far end on the stabilizing inner frame 42 to increase the height of the stabilizing outer frame 41. One end of the stay cable 12 is fixed to the stabilizing outer frame 41, and the other end of the stay cable 12 is fixed to the suspension beam 3 so that the suspension beam 3 is supported by the support frame 1 and at the same time supported by the stay cable 12. A movable segmental erection winch 10 is provided on the suspension beam 3, and the segmental erection winch 10 suspends the steel structure box girder in control. By welding the steel structure box girder to the already constructed bridge section, a long-span continuous steel structure bridge section is formed.

[0047] When constructing the concrete section of the bridge, the hanging basket 2 is suspended by the support frame 1 for cantilever casting construction. After constructing a section of the concrete bridge section, it moves on the horizontal stable inner frame 42 through the horizontal stable outer frame 41. The stable outer frame 41 drives the support frame 1 to move a certain distance, and the force on the support frame 1 is transferred to the stable outer frame 41 and the stable inner frame 42, which can drive the support frame 1 to move forward more conveniently, make the support frame 1 more stable, and have a better support effect. When constructing the steel structure box girder of the bridge, the stable outer frame 41 and the stable inner frame 42 are rotated to be vertical. By building a suspension beam 3 on the support frame 1, one end of the stay cable 12 is fixed on the stable outer frame 41, and the other end is fixed on the suspension beam 3, so that the suspended winch 10 can move conveniently on the suspension beam 3, which is convenient for suspension. At the same time, the stay cable 12 makes the suspension beam 3 more stable, not easy to shake, and has a stronger bearing capacity. The stable outer frame 41 and the stable inner frame 42 are used to fix the support frame 1 and drive the support frame 1 to move during cantilever casting, and are used to support the suspension beam 3 through the stay cable 12 during suspended splicing. Together with the suspension beam 3 built on the support frame 1, it saves the removal of the support frame 1 and the construction of another stay cable support, reduces the construction period, and the construction is faster.

[0048] Preferably, there are two stable outer frames 41, stable inner frames 42 and support frames 1, and they are located at both ends of the bridge. During the cantilever casting construction of the bridge, the concrete section can be constructed from both ends to the middle. During the suspended splicing construction of the bridge, the suspension beam 3 is built on the two support frames 1, and there are two suspended winches 10 on the suspension beam 3, and it can also be constructed from both ends, making the suspension beam 3 more stable and more in line with the existing construction method, reducing the construction period.

[0049] Furthermore, referring to Figures 1 - 12 , the rear anchor point 6 includes a rear anchor plate 61 and a rear anchor frame 62. One end of the top of the stable inner frame 42 is fixedly installed with a rotating rod 11, and the rotating rod 11 is rotatably connected to the rear anchor frame 62. A main anchor point 7 is arranged on the side of the rear anchor point 6 away from the support frame 1. The main anchor point 7 includes a fixed cable 71 and a fixed winch 72. The fixed winch 72 can rotate the stable inner frame 42 and the stable outer frame 41 from horizontal to vertical through the fixed cable 71.

[0050] Anchoring the rear anchor plate 61 on the already constructed bridge is an existing technology to fix the stable inner frame 42. When suspended splicing construction is required after the cantilever casting construction is completed, the fixed winch 72 winds the fixed cable 71, and the fixed cable 71 pulls the stable outer frame 41, causing the stable outer frame 41 and the stable inner frame 42 to rotate from horizontal to vertical.

[0051] Furthermore, referring to Figures 1 - 12 , the main anchor point 7 further includes a fixed frame 73. The fixed winch 72 is fixedly installed on the fixed frame 73. One end of the fixed cable 71 is connected to the fixed winch 72, and the other end of the fixed cable 71 is fixedly installed on the stable outer frame 41.

[0052] The fixed frame 73 is anchored to the constructed bridge on the shore or near the shore, with stronger bearing capacity. During the cantilever erection construction of the bridge, the fixed cable 71 tightens and stabilizes the outer frame 41, making the outer frame 41 more stable vertically. The outer frame 41 has stronger bearing capacity, and the fixed cable 71 and the stay cable 12 are located on both sides of the outer frame 41, enabling part of the lateral force of the outer frame 41 exerted by the stay cable 12 to be transferred to the main anchor point 7 through the fixed cable 71, reducing the stress on the outer frame 41, and increasing the support for the suspended beam 3 through the main anchor point 7, making the suspended beam 3 more stable.

[0053] Furthermore, referring to Figures 1 - 12 , a driving auxiliary component 8 is provided on the fixed frame 73. The driving auxiliary component 8 includes a driving motor 81, a reducer 82, a driving sprocket 83, a driven sprocket 84, and a chain 85. The driving motor 81 is fixedly installed inside the fixed frame 73, the output end of the driving motor 81 is connected to the input end of the reducer 82, the driving sprocket 83 is fixedly installed at the output end of the reducer 82, the driven sprocket 84 is fixedly installed at one end of the rotating rod 11, and the chain 85 is connected between the driving sprocket 83 and the driven sprocket 84.

[0054] When the cantilever casting construction of the bridge is completed and the cantilever erection construction is required, the fixed winch 72 pulls the outer frame 41 to rotate through the fixed cable 71. At the same time, the driving motor 81 is started. The driving motor 81 drives the driving sprocket 83 to rotate through the reducer 82. The driving sprocket 83 drives the chain 85 to rotate. The chain 85 drives the driven sprocket 84 to rotate. The driven sprocket 84 drives the rotating rod 11 to rotate. The rotating rod 11 drives the inner frame 42 to rotate, causing the inner frame 42 and the outer frame 41 to rotate. At the initial stage of rotation, the inner frame 42 and the outer frame 41 are close to horizontal. However, the fixed cable 71 is obliquely fixed to the outer frame 41, with less force exerted on the outer frame 41 and large losses. By the auxiliary rotation of the driving motor 81, the power requirement for the fixed winch 72 is reduced.

[0055] Furthermore, referring to Figures 1 - 12 , a fixed frame 13 is installed on the fixed frame 73, and a fixed wheel 14 is fixedly installed on the fixed frame 13. When the stabilizing assembly 4 is in the cantilever casting state, the fixed cable 71 abuts against the fixed wheel 14.

[0056] During the cantilever casting construction of the bridge, the inner frame 42 and the outer frame 41 are horizontal. The fixed cable 71 fixed to the outer frame 41 abuts against the fixed wheel 14, fixing the outer frame 41 through the fixed cable 71. The fixed cable 71 transfers the moment received by the outer frame 41 to the fixed frame 13, further ensuring the stable stress and strong bearing capacity of the support frame 1.

[0057] Furthermore, referring toFigures 1 - 12 Inside the fixed frame 73, a support assembly is provided. The support assembly includes a support frame 91. When in the cantilever casting state, the support frame 91 is located on one side of the stable inner frame 42 and abuts against the stable inner frame 42. When in the cantilever erection state, the support frame 91 is located at the bottom of the stable inner frame 42 and abuts against the stable inner frame 42.

[0058] During the cantilever erection construction, when the stable outer frame 41 and the stable inner frame 42 rotate to the vertical position, the support frame 91 moves to the bottom of the stable inner frame 42 to support the stable inner frame 42 and ensure the stability of the stable inner frame 42.

[0059] Further, referring to Figures 1 - 12 The support assembly further includes a hydraulic drive rod 92. One end of the hydraulic drive rod 92 is fixedly installed inside the fixed frame 73, and the output end of the hydraulic drive rod 92 is fixedly installed on the support frame 91. Support sliders 15 are fixedly installed on both sides of the fixed frame 73, and support chutes 16 are opened on the inner walls of both sides of the fixed frame 73. The two support sliders 15 are respectively slidably connected in the corresponding support chutes 16.

[0060] During the cantilever erection construction, the hydraulic drive rod 92 pushes the support frame 91 to move, moves the support frame 91 to the bottom of the stable inner frame 42, and the support frame 91 drives the support sliders 15 to move in the support chutes 16 to ensure that the movement of the support frame 91 is more stable.

[0061] Further, referring to Figures 1 - 12 The stable outer frame 41 is sleeved on the stable inner frame 42. Plain sliders are fixedly installed at the four corners of the stable inner frame 42. A drive assembly 5 is connected between the stable outer frame 41 and the stable inner frame 42. The drive assembly 5 includes an extension winch 51, a retraction winch 52, a drive steel cable 53, a first deflecting pulley 54, and a second deflecting pulley 55. The extension winch 51 is fixedly installed on the stable inner frame 42, the retraction winch 52 is fixedly installed on the stable outer frame 41, one end of the drive steel cable 53 is connected to the extension winch 51, the other end of the drive steel cable 53 is connected to the retraction winch 52, the first deflecting pulley 54 is rotatably connected to the stable outer frame 41, a connecting plate is fixedly installed on the stable outer frame 41, the second deflecting pulley 55 is rotatably connected to the connecting plate, the drive steel cable 53 is on the first deflecting pulley 54 and the second deflecting pulley 55, and the drive steel cable 53 passes through the connecting plate and is slidably engaged with the connecting plate.

[0062] Through the plain sliders installed on the stable inner frame 42, the stable outer frame 41 is not easily stuck by the frame structure during the movement on the stable inner frame 42. When it is necessary to move the support frame 1, the extension winch 51 is driven. The extension winch 51 winds the drive steel cable 53, and the drive steel cable 53 drives the stable outer frame 41 to move, and the stable outer frame 41 drives the support frame 1 to move.

[0063] Further, referring to Figures 1 - 12 , a moving slide rail 17 is provided at the bottom of the support frame 1. Sliding components are installed on both the support frame 1 and the rear anchor plate 61. The sliding component includes a sliding plate 18, a sliding block 19, and two sliding wheels 20. The sliding plate 18 provided on the support frame 1 is fixedly installed at the bottom of the support frame 1. The sliding plate 18 provided on the rear anchor plate 61 is fixedly installed at the bottom of the rear anchor plate 61. The sliding block 19 is fixedly installed at the bottom of the sliding plate 18, and the sliding plate 18 is slidably fitted in the moving slide rail 17. The sliding wheels 20 are rotatably connected to the bottom of the sliding plate 18, and the two sliding wheels 20 are respectively located on both sides of the moving slide rail 17.

[0064] The moving slide rail 17 is anchored on the already constructed bridge section. After each bridge section is constructed, a section of the moving slide rail 17 is anchored on this bridge section. The movement of the support frame 1 drives the sliding plate 18 to move. The sliding plate 18 drives the sliding block 19 to move within the moving slide rail 17. The sliding plate 18 drives the sliding wheels 20 to move on both sides of the moving slide rail 17, ensuring that the support frame 1 is not easily deviated during movement, the movement is more stable, and the friction during the movement process is smaller.

[0065] Further, referring to Figures 1 - 12 , a bearing rod 21 is fixedly installed at the bottom of the stable outer frame 41. A mating groove is provided at the bottom of the bearing rod 21 corresponding to the position of the moving slide rail 17. A first mounting plate 22 is fixedly installed on the stable outer frame 41. A second mounting plate 23 is fixedly installed on the stable inner frame 42. When the stable component 4 is in the cantilever erection state, the first mounting plate 22 is located at the position corresponding to the second mounting plate 23. Mounting holes are provided on both the first mounting plate 22 and the second mounting plate 23. A first connection hole is provided on the support frame 91. A second connection hole is provided on the stable inner frame 42. When the support component is in the cantilever erection state, the second connection hole corresponds to the first connection hole. A fixing column 24 is connected to the connecting plate. A plurality of fixing grooves are provided on the fixing column 24. When the stable component 4 is in the cantilever erection state, one end of the stay cable 12 is fixedly installed in the fixing groove. The support frame 1 is connected to the hanging basket 2 through a cast-in-place cable.

[0066] During the cantilever casting construction of the bridge, the stable outer frame 41 transfers the moment to the moving slide rail 17 through the bearing rod 21, further ensuring the stability of the stable outer frame 41 and the support frame 1. During the cantilever erection construction of the bridge, the stable outer frame 41 drives the first mounting plate 22 to move to the position corresponding to the second mounting plate 23, and bolts are installed between the first mounting plate 22 and the second mounting plate 23. The stable outer frame 41 transfers the stressed moment to the stable inner frame 42, reducing the power requirement for the extended winch 51 and ensuring the force stability of the stable outer frame 41 in the vertical state. When the stable inner frame 42 is in the vertical state, bolts are installed in the first connection hole and the second connection hole to fix the support frame 91 and the stable inner frame 42, making the connection between the stable inner frame 42 and the support frame 91 more stable and the stable inner frame 42 more stable.

[0067] A front anchor plate 25 is fixedly installed on the support frame 1. After the stable external frame 41 is disengaged from the support frame 1, the front anchor plate 25 is anchored on the constructed bridge section to ensure the stability of the support frame 1. When the lengths of the stable external frame 41 and the stable internal frame 42 are not sufficient to complete the construction of the bridge concrete section, the front anchor plate 25 is anchored on the constructed bridge section, the rear anchor plate 61 is disengaged from the anchor, and the steel cable 53 is wound and driven by the retracting winch 52. The driven steel cable 53 drives the stable internal frame 42 to move, and the stable internal frame 42 moves into the stable external frame 41, so that a large section of the stable internal frame 42 moves forward.

[0068] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A cantilever casting and cantilever erection combined crane for a steel-concrete hybrid variable cross-section continuous box girder bridge with the function of adjusting the linear shape, comprising a support frame (1), characterized in that: When in the cantilever casting state, the support frame (1) is used to support the hanging basket (2), and when in the cantilever erection state, the support frame (1) is used to support the suspended beam (3); a stabilizing assembly (4) is connected to the support frame (1). The stabilizing assembly (4) includes a stabilizing outer frame (41) and a stabilizing inner frame (42). The stabilizing inner frame (42) is rotatably connected to the rear anchor point (6), and the stabilizing outer frame (41) can move on the stabilizing inner frame (42); when the stabilizing assembly (4) is in the cantilever casting state, the stabilizing outer frame (41) and the stabilizing inner frame (42) are horizontally arranged, and the movement of the stabilizing outer frame (41) on the stabilizing inner frame (42) can drive the support frame (1) to move; when the stabilizing assembly (4) is in the cantilever erection state, the stabilizing inner frame (42) and the stabilizing outer frame (41) can rotate to the vertical on the rear anchor point (6). When the stabilizing assembly (4) is in the cantilever erection state, the suspended beam (3) can be connected to the stabilizing outer frame (41) through the stay cables (12). A movable cantilever erection winch (10) is arranged on the suspended beam (3).

2. A combined cantilever casting and cantilever erection crane for a steel-concrete hybrid variable cross-section continuous box girder bridge with the function of adjusting the linear shape, characterized in that: The rear anchor point (6) includes a rear anchor plate (61) and a rear anchor frame (62). One end of the stabilizing inner frame (42) is fixedly installed with a rotating rod (11), and the rotating rod (11) is rotatably connected to the rear anchor frame (62). A main anchor point (7) is arranged on the side of the rear anchor point (6) away from the support frame (1). The main anchor point (7) includes a fixed cable (71) and a fixed winch (72), and the fixed winch (72) can rotate the stabilizing inner frame (42) and the stabilizing outer frame (41) from the horizontal to the vertical through the fixed cable (71).

3. A combined cantilever casting and cantilever erection crane for a steel-concrete hybrid variable cross-section continuous box girder bridge with the function of adjusting the linear shape, characterized in that: The main anchor point (7) further includes a fixed frame (73). The fixed winch (72) is fixedly installed on the fixed frame (73). One end of the fixed cable (71) is connected to the fixed winch (72), and the other end of the fixed cable (71) is fixedly installed on the stabilizing outer frame (41).

4. A combined cantilever casting and cantilever erection crane for a steel-concrete hybrid variable cross-section continuous box girder bridge with the function of adjusting the linear shape, characterized in that: A driving auxiliary assembly (8) is arranged on the fixed frame (73). The driving auxiliary assembly (8) includes a driving motor (81), a reducer (82), a driving sprocket (83), a driven sprocket (84) and a chain (85). The driving motor (81) is fixedly installed in the fixed frame (73), the output end of the driving motor (81) is connected to the input end of the reducer (82), the driving sprocket (83) is fixedly installed on the output end of the reducer (82), the driven sprocket (84) is fixedly installed on one end of the rotating rod (11), and the chain (85) is connected between the driving sprocket (83) and the driven sprocket (84).

5. A combined cantilever casting and cantilever erection crane for a steel-concrete hybrid variable cross-section continuous box girder bridge with the function of adjusting the linear shape, characterized in that: A fixed frame (13) is installed on the fixed frame (73), and a fixed wheel (14) is fixedly installed on the fixed frame (13). When the stabilizing assembly (4) is in the cantilever casting state, the fixed cable (71) abuts against the fixed wheel (14).

6. A combined cantilever casting and cantilever erection crane for a steel-concrete hybrid variable cross-section continuous box girder bridge with the function of adjusting the linear shape, as claimed in claim 3, wherein: A support assembly is arranged inside the fixed frame (73). The support assembly includes a support frame (91). When in the cantilever casting state, the support frame (91) is located on one side of the stable inner frame (42) and abuts against the stable inner frame (42); when in the cantilever erection state, the support frame (91) is located at the bottom of the stable inner frame (42) and abuts against the stable inner frame (42).

7. A combined cantilever casting and cantilever erection crane for a steel-concrete hybrid variable cross-section continuous box girder bridge with the function of adjusting the linear shape, characterized in that: The support assembly further includes a hydraulic drive rod (92). One end of the hydraulic drive rod (92) is fixedly installed inside the fixed frame (73), and the output end of the hydraulic drive rod (92) is fixedly installed on the support frame (91). Support sliders (15) are fixedly installed on both sides of the fixed frame (73), and support chutes (16) are formed on the inner walls of both sides of the fixed frame (73). The two support sliders (15) are respectively slidably connected in the corresponding support chutes (16).

8. A combined cantilever casting and cantilever erection crane for a steel-concrete hybrid variable cross-section continuous box girder bridge with the function of adjusting the linear shape, characterized in that: The stable outer frame (41) is sleeved on the stable inner frame (42). Plain sliders are fixedly installed at the four corners of the stable inner frame (42). A drive assembly (5) is connected between the stable outer frame (41) and the stable inner frame (42). The drive assembly (5) includes an extension winch (51), a retraction winch (52), a drive cable (53), a first deflection pulley (54), and a second deflection pulley (55). The extension winch (51) is fixedly installed on the stable inner frame (42), the retraction winch (52) is fixedly installed on the stable outer frame (41), one end of the drive cable (53) is connected to the extension winch (51), the other end of the drive cable (53) is connected to the retraction winch (52), the first deflection pulley (54) is rotatably connected to the stable outer frame (41), a connecting plate is fixedly installed on the stable outer frame (41), the second deflection pulley (55) is rotatably connected to the connecting plate, the drive cable (53) is wound around the first deflection pulley (54) and the second deflection pulley (55), and the drive cable (53) passes through the connecting plate and is slidably engaged with the connecting plate.

9. A combined cantilever casting and cantilever erection crane for a steel-concrete hybrid variable cross-section continuous box girder bridge with the function of adjusting the linear shape, characterized in that: A moving slide rail (17) is arranged at the bottom of the support frame (1). Sliding assemblies are installed on both the support frame (1) and the rear anchor plate (61). The sliding assemblies include a sliding plate (18), a sliding block (19), and two sliding wheels (20). The sliding plate (18) arranged on the support frame (1) is fixedly installed at the bottom of the support frame (1), the sliding plate (18) arranged on the rear anchor plate (61) is fixedly installed at the bottom of the rear anchor plate (61), the sliding block (19) is fixedly installed at the bottom of the sliding plate (18), and the sliding plate (18) is slidably engaged in the moving slide rail (17). The sliding wheels (20) are rotatably connected to the bottom of the sliding plate (18), and the two sliding wheels (20) are respectively located on both sides of the moving slide rail (17).

10. A combined cantilever casting and cantilever erection crane for a steel-concrete hybrid variable cross-section continuous box girder bridge with the function of adjusting the linear shape, characterized in that: A bearing rod (21) is fixedly installed at the bottom of the stable external frame (41). A matching groove is provided at the bottom of the bearing rod (21) corresponding to the position of the moving slide rail (17). A first mounting plate (22) is fixedly installed on the stable external frame (41), and a second mounting plate (23) is fixedly installed on the stable internal frame (42). When the stable component (4) is in the suspended splicing state, the first mounting plate (22) is located at the position corresponding to the second mounting plate (23). Mounting holes are provided on both the first mounting plate (22) and the second mounting plate (23). A first connection hole is provided on the support frame (91), and a second connection hole is provided on the stable internal frame (42). When the support component is in the suspended splicing state, the second connection hole corresponds to the first connection hole. A fixing column (24) is connected to the connecting plate, and a number of fixing grooves are provided on the fixing column (24). When the stable component (4) is in the suspended splicing state, one end of the stay cable (12) is fixedly installed in the fixing groove. A hanging basket (2) is connected to the support frame (1) through a cantilever casting cable.

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