Opposite-penetrating steel strand auxiliary tensioning device for concrete-filled steel tube tied arch bridge

Abstract

The invention discloses an opposite-penetrating steel strand auxiliary tensioning device for a concrete-filled steel tube tied arch bridge, and belongs to the technical field of bridge assembly equipment.The opposite-penetrating steel strand auxiliary tensioning device structurally comprises a suspension seat, two vertical traction platforms and two movable bases, and the two vertical traction platforms are located on the two sides of the suspension seat respectively; the two vertical traction platforms correspond to the two movable bases in position, the two movable bases are installed on the bridge floor on the side portion of the main beam in a sliding mode, the upper ends and the lower ends of the vertical traction platforms are connected with the hanging bases and the movable bases through a set of steel wire ropes respectively, and the other ends of the two sets of steel wire ropes are arranged on the upper winding drum and the lower winding drum respectively; according to the tensioning device, auxiliary tensioning operation is conducted on the opposite-penetrating steel strands on the concrete-filled steel tube tied arch bridge, the arc-shaped steel strands on the two sides of the opposite-penetrating channel located on the concrete-filled steel tube arch rib can be pulled and transferred, and the tensioning speed and precision of the opposite-penetrating steel strands are improved; and construction delay caused by complex states of the steel strands is reduced, so that the overall construction efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge assembly equipment, and specifically relates to an auxiliary tensioning device for through-strand of a concrete-filled steel tube tied arch bridge. Background Art

[0002] The Nielson system arch bridge uses crossed inclined suspenders instead of the traditional straight suspender system arch bridge, which can greatly improve the vertical stiffness of the structure and reduce the bending moment and shear force of the main arch and the tie rod; however, due to the very complex Nielson system, the suspenders cross each other, and there is an angle between the suspenders and the horizontal plane. Therefore, at the anchorage end of the concrete-filled steel tube arch rib, the two crossed suspenders will interfere with each other. By using through-strand, only one end of the strand needs to be tensioned on the main beam, eliminating the step of installing an anchor box in the concrete-filled steel tube arch rib, which can improve construction efficiency and reduce construction costs; The existing strand tensioning anti-wear structure with the application number CN202210066388.X discloses a solution that combines the use of a lifting device and a displacement sensor to implement real-time detection of the clamping position and pulling state of the end of the strand, and according to the tensioning state of the strand, correspondingly change the clamping method for the strand to maintain a stable tensioning state of the strand; specifically: install the tensioning shell and the backing plate together. At this time, move the tensioning anti-wear structure to a suitable position, adjust the height through the lifting device, and then turn on the switch button to operate the motor. The driving gear drives the driven gear directly above it to rotate, and then the meshing movement between multiple gears is realized to open between multiple clamping plates. Pass the strand through the collar and between multiple clamping plates. At this time, the staff can use the blocking mechanism to limit the casters to prevent them from moving. Then, press the switch button again. At this time, the motor moves, and the motor shaft rotates counterclockwise. Then, the clamping plate can be used to clamp the strand. After that, the motor works to pull the screw seat to move horizontally, and then the strand is tensioned. During the tensioning process, when the set value of the sensor is reached, the control system controls the motor to stop, and the electric push rod moves. One collar moves upward, and the other collar moves downward to clamp the strand. Then, the motor moves, and the clamping plate no longer clamps the strand. In this way, the tensioning shell can be disassembled, and the tensioned strand can be fixed by using the backing plate and its surrounding components; However, when using the technical solution in the above-mentioned patent document, only the traction and tensioning operation can be carried out on the end of the steel strand at the ground end; the application scope of this operation mode in practical applications is relatively narrow, and it is only applicable to the tensioning operation of the steel strand with straight ends; especially under the working condition that the steel strands on both sides of the through-channel of the steel tube concrete arch rib pass through, the limitation of this operation mode becomes more and more prominent; since the steel strands on both sides of the through-channel on the steel tube concrete arch rib are in an arc state, the use of the above-mentioned equipment cannot adapt to this special situation, and the traction operation cannot be effectively carried out on the steel strands in this type of bridge, and it is difficult to achieve the goal of auxiliary tensioning operation; the improvement of construction efficiency and project quality is limited; therefore, the present application provides an auxiliary tensioning device for the through-channel steel strands of a steel tube concrete tie arch bridge. Summary of the invention

[0003] In order to address the deficiencies in the above-mentioned prior art, the object of the present invention is to provide an auxiliary tensioning device for the crossing steel strands of a steel tube concrete tie arch bridge, which performs auxiliary tensioning operations on the crossing steel strands on the steel tube concrete tie arch bridge, and can pull and transfer the steel strands in an arc-shaped state on both sides of the crossing channel on the steel tube concrete arch rib, thereby improving the tensioning speed and accuracy of the crossing steel strands, reducing construction delays caused by the complex state of the steel strands, and thereby improving the overall construction efficiency.

[0004] The technical solution adopted by the present invention to solve the technical problem is: Provided is a steel tube concrete tied arch bridge cross-strand auxiliary tensioning device, comprising a suspension seat, two vertical traction platforms and two movable bases; the suspension seat is slidably installed on the steel tube concrete arch rib, the two vertical traction platforms are respectively located on both sides of the suspension seat, the two vertical traction platforms correspond to the positions of the two movable bases, and the two movable bases are slidably installed on the bridge deck at the side of the main beam; fastening arms and extension frames are respectively fixedly installed on both sides of the suspension seat, two fastening arms and two extension frames are respectively provided, pads are provided on the inner sides of the suspension seat and the fastening arms, the inner sides of the pads are fitted with the outer sides of the steel tube concrete arch rib, an upper moving wheel and a hydraulic motor I for driving the moving wheel to rotate are installed on the suspension seat, the upper moving wheel passes through the pad and is connected to the outer side of the steel tube concrete arch rib by friction transmission.

[0005] Further, the vertical traction platform is slidably installed on the side of the transverse movement base, the transverse movement base is horizontally slidably installed on the extension frame, the upper and lower ends of the vertical traction platform are respectively connected to the suspension seat and the moving base by a set of steel wire ropes, at least two steel wire ropes are provided in each set, and the other ends of the two sets of steel wire ropes are respectively connected and wound on the upper take-up reel and the lower take-up reel. The upper take-up reel is rotatably connected to the swivel ring, the swivel ring is fixedly installed on the side of the transverse movement base, the lower take-up reel is rotatably connected to the moving base, and hydraulic motors VI and VII for driving the upper take-up reel and the lower take-up reel to rotate are respectively installed on the transverse movement base and the moving base.

[0006] Further, a hook arm is rotatably installed on the side of the vertical traction platform. At the end of the hook arm, a chuck for clamping the through-strand steel wire and a driving and controlling wheel for pulling and transferring the end of the through-strand steel wire to the through-channel on the side of the concrete-filled steel tubular arch rib are rotatably installed. The outer side of the driving and controlling wheel protrudes from the surface of the hook arm close to the chuck side. A hydraulic motor V for driving the driving and controlling wheel to rotate is installed in the hook arm.

[0007] Further, an arc arm is fixedly installed on the chuck. The arc arm is fitted and slidably connected to the chute I in the chuck. A driving and controlling arm is provided at the end of the arc arm. The driving and controlling arm is slidably connected to the chute II in the hook arm. A hydraulic cylinder II is fixedly installed on the side of the hook arm away from the chuck. The movable end of the hydraulic cylinder II is rotatably installed with a hinge arm, and the other end of the hinge arm is fitted and rotatably connected to the driving and controlling arm.

[0008] In the present application, for the rotation driving method of the hook arm, an alternative technical solution is: a hydraulic motor IV for driving the hook arm to rotate is installed in the vertical traction platform.

[0009] In the present application, for the rotation driving method of the hook arm, another alternative technical solution is: the hydraulic motor IV is connected to the vertical traction platform through a fitting ball. A spherical cavity is integrally provided on the vertical traction platform. The fitting ball is rotatably installed in the spherical cavity. The hydraulic motor IV is installed in the fitting ball. A U-shaped frame is fixedly installed on the outer side of the fitting ball. The U-shaped frame is rotatably connected to the hook arm.

[0010] Further, a turntable and a hydraulic motor III for driving the turntable to rotate are installed in the vertical traction platform. Hinge seats I and II are respectively fixedly installed on the outer side of the fitting ball and the bottom of the turntable. A hydraulic cylinder I is rotatably installed on the hinge seat II. The movable end of the hydraulic cylinder I is rotatably connected to the hinge seat I.

[0011] Further, the steel wire rope is connected to the vertical traction platform through an inlay block. The inlay block is welded to the steel wire rope. The inlay block is fitted and inserted into the vertical traction platform and the position is locked by a fastener.

[0012] Further, a lead screw and a hydraulic motor II for driving the lead screw to rotate are installed on the extension frame, and an internal thread sleeve is fixedly installed in the middle of the transverse movement seat. The internal thread sleeve is in threaded transmission connection with the lead screw.

[0013] Further, a docking end is detachably and fixedly installed on the side of the transverse movement seat. A hole for the steel wire rope to pass through is provided on the docking end, and the number of holes is the same as the number of steel wire ropes; a convex pin is fixedly installed on the side of the vertical traction platform, and a chute III is provided on the side of the transverse movement seat. The convex pin can be fitted and slidably connected with the chute III.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. For the through-strand auxiliary tensioning device of the concrete-filled steel tube tied arch bridge in the example of the present invention, both ends of the through-strand can respectively construct anchoring ends at different positions of the main beam. This anchoring method can effectively utilize the structural dimensions of the main beam to achieve a relatively stable connection. After the middle of the through-strand passes through the pre-set through-channel on the concrete-filled steel tube arch rib, it still remains as a complete structure, and there is no need to anchor this position, thus eliminating the complex process of installing the anchor box, simplifying the construction process, and significantly improving the construction efficiency.

[0015] 2. For the through-strand auxiliary tensioning device of the concrete-filled steel tube tied arch bridge in the example of the present invention, an auxiliary tensioning operation is carried out on the through-strand on the concrete-filled steel tube tied arch bridge. After the end of the through-strand is inserted from one end of the through-channel, it is moved out from the other end of the through-channel; during this process, the two vertical traction platforms are respectively located on both sides of the through-channel, and the hanging seat is installed on one side of the concrete-filled steel tube arch rib, and the through-channel is arranged on the other side of the concrete-filled steel tube arch rib, and there will be no construction interference due to the structure of the through-strand itself, and the construction stability is good.

[0016] 3. For the through-strand auxiliary tensioning device of the concrete-filled steel tube tied arch bridge in the example of the present invention, two hook arms and chucks are combined to alternately clamp the end of the through-strand, and the vertical movement of the vertical traction platform between the hanging seat and the moving base, and the horizontal movement of the vertical traction platform on the extension frame are used to accurately transfer the end of the through-strand to the steel strand tensioning equipment on the bridge surface, so as to achieve the purpose of through-strand auxiliary tensioning. The through-strand is installed between the main beam and the concrete-filled steel tube arch rib, replacing the traditional scheme using suspension rods, reducing construction delays caused by the complex state of the steel strands, and further improving the overall construction efficiency.

[0017] 4. The auxiliary tensioning device for the cross-through steel strands of the concrete-filled steel tube tied-arch bridge according to the example of the present invention, wherein the hydraulic motor IV is connected to the vertical traction platform through a fitting ball. A spherical cavity is integrally provided on the vertical traction platform, and the fitting ball is rotatably installed in the spherical cavity. When the hook arm and the chuck are in the clamping state of the cross-through steel strands, due to the large spatial rotation range at the lower end of the hook arm, precise spatial position adjustment of the hook arm and the chuck can be achieved, which is more adaptable to the cross-through steel strands in an arc shape on both sides of the cross-through channel on the concrete-filled steel tube arch rib, ensuring the smooth progress of subsequent construction processes.

[0018] 5. The auxiliary tensioning device for the cross-through steel strands of the concrete-filled steel tube tied-arch bridge according to the example of the present invention, wherein the arc-shaped arm is arc-shaped, so that the rotation center of the chuck is located between the hook arm and the chuck. When clamping the cross-through steel strands, a cylindrical clamping area is formed between the hook arm and the chuck, and the acting points applied to the outer side of the cross-through steel strands can effectively cover most areas on the outer side of the steel strands passing through, effectively restricting the movement of the cross-through steel strands and ensuring the smooth progress of the subsequent process of transferring the cross-through steel strands into the cross-through channel. The overall use effect of the equipment is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Other features, purposes, and advantages of the present application will become more apparent by reading the detailed description of the non-restrictive embodiments with reference to the following drawings: Figure 1 Schematic diagram of the main beam, concrete-filled steel tube arch rib, and cross-through steel strands provided by the embodiment of the present invention; Figure 2 Schematic diagram of the concrete-filled steel tube arch rib and cross-through steel strands provided by the embodiment of the present invention; Figure 3 For the present invention Figure 1 Enlarged view at A in Figure 4 Schematic diagram of the suspension seat, vertical traction platform, and hook arm provided by the embodiment of the present invention; Figure 5 Schematic diagram of the upper moving wheel, fitting ball, hook arm, chuck, and transverse movement seat provided by the embodiment of the present invention; Figure 6 Schematic diagram of the arc-shaped edge, fastening arm, and gasket provided by the embodiment of the present invention; Figure 7 Schematic diagram of the moving base and lower winding drum provided by the embodiment of the present invention; Figure 8 Schematic diagram of the transverse movement seat, docking end, and swivel ring provided by the embodiment of the present invention; Figure 9 Schematic diagram of the vertical traction platform, steel wire rope, fitting ball, and hook arm provided by the embodiment of the present invention; Figure 10 The sectional profile view of the vertical traction platform and the fitting ball provided by the embodiment of the present invention; Figure 11 The structural schematic diagram of the hinge seat Ⅰ, U-shaped frame and limiting plate provided by the embodiment of the present invention; Figure 12 The structural schematic diagram of the hook arm, chuck and drive control wheel provided by the embodiment of the present invention; Figure 13 The structural schematic diagram of the chute Ⅰ, chute Ⅱ and installation groove provided by the embodiment of the present invention; Figure 14 The structural schematic diagram of the anti-slip groove, arc arm and drive control arm provided by the embodiment of the present invention.

[0020] In the figure: 11 main beam, 12 concrete-filled steel tube arch rib, 121 through channel, 13 through steel strand, 21 suspension seat, 211 arc edge, 22 fastening arm, 23 gasket, 24 hydraulic motor Ⅰ, 25 upper moving wheel, 26 rotating wheel, 27 extension frame, 28 lead screw, 281 hydraulic motor Ⅱ, 31 vertical traction platform, 311 spherical cavity, 312 convex pin, 32 steel wire rope, 321 embedding block, 33 fitting ball, 331 hinge seat Ⅰ, 332 U-shaped frame, 34 turntable, 341 hydraulic motor Ⅲ, 342 limiting plate, 343 hinge seat Ⅱ, 344 hydraulic cylinder Ⅰ, 35 hook arm, 351 hydraulic motor Ⅳ, 352 chute Ⅰ, 353 chute Ⅱ, 354 installation groove, 36 chuck, 361 anti-slip groove, 362 arc arm, 363 drive control arm, 37 hinge arm, 38 hydraulic cylinder Ⅱ, 39 drive control wheel, 391 hydraulic motor Ⅴ, 41 transverse movement seat, 411 internal thread sleeve, 412 chute Ⅲ, 42 docking end, 43 swivel ring, 44 upper take-up reel, 51 moving base, 52 lower take-up reel, 53 counterweight. Detailed implementation manners

[0021] Next, the technical solutions of the present invention will be clearly and completely described in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments.

[0022] Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed present invention, but merely represents the selected embodiments of the present invention.

[0023] Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0024] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. These terms are only used for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and should not be construed as indicating or implying relative importance.

[0025] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. Additionally, it should be noted that for the convenience of description, only the parts related to the invention are shown in the drawings.

[0027] Under the existing Nielsen system arch bridge system, a plurality of suspenders are provided between the main girder 11 and the concrete-filled steel tube arch rib 12, and in this application, multiple through-strand steel wires 13 are used to replace the multiple suspenders. The specific advantages are as follows: First, the construction is simple and the bridge construction technology is optimized; both ends of a single through-strand steel wire 13 can respectively construct anchoring ends at different positions of the main girder 11. This anchoring method can effectively utilize the structural dimensions of the main girder 11 to achieve a relatively stable connection. After the middle part of the through-strand steel wire 13 passes through the through-channel 121 pre-set on the concrete-filled steel tube arch rib 12, it still remains as a complete structure body, and there is no need to anchor this position, thus eliminating the complex process of anchor box installation, simplifying the construction process, and significantly improving the construction efficiency.

[0028] Second, the economic benefit is high; since the input of material resources necessary for the anchor box installation link is reduced, for example, the consumption of building materials such as steel and concrete is reduced; in terms of manpower, there is no need to invest a large amount of manpower in the installation operation of the anchor box, such as the man-hour input of technical workers and the organizational coordination cost of the construction team are reduced; these changes further enhance the economic benefit in the overall construction process, showing obvious advantages in the cost-benefit analysis, and contributing to the optimal allocation of resources and the effective control of costs throughout the life cycle of the engineering project.

[0029] Example 1: As shown in Figure 1 , Figure 2 and Figure 3 , this embodiment provides an auxiliary tensioning device for the through - strand of a concrete - filled steel tube tied - arch bridge, including a suspension seat 21, two vertical traction platforms 31 and two moving bases 51; the suspension seat 21 is slidably installed on the concrete - filled steel tube arch rib 12, the two vertical traction platforms 31 are respectively located on both sides of the suspension seat 21, the two vertical traction platforms 31 correspond to the two moving bases 51 in position, and the two moving bases 51 are slidably installed on the bridge deck on the side of the main beam 11.

[0030] As shown in Figure 4 , Figure 5 and Figure 6 , fastening arms 22 and extension frames 27 are respectively and fixedly installed on both sides of the suspension seat 21, there are two fastening arms 22 and two extension frames 27 respectively, a gasket 23 is arranged on the inner sides of the suspension seat 21 and the fastening arms 22 to increase the adhesion between the device and the concrete - filled steel tube arch rib 12; the inner side surface of the gasket 23 is in contact with the outer side surface of the concrete - filled steel tube arch rib 12, a top - moving wheel 25 and a hydraulic motor I 24 for driving the rotation of the moving wheel 25 are installed on the suspension seat 21, the top - moving wheel 25 penetrates through the gasket 23 and is friction - drivenly connected to the outer side surface of the concrete - filled steel tube arch rib 12.

[0031] As shown in Figure 5 and Figure 6 , an arc edge 211 is integrally formed on the suspension seat 21, the inner side surface of the arc edge 211 is in contact with the outer side surface of the concrete - filled steel tube arch rib 12 to increase the sliding stability of the suspension seat 21 on the concrete - filled steel tube arch rib 12; a rotating wheel 26 is rotatably installed on the fastening arm 22, the rotating wheel 26 penetrates through the gasket 23 and abuts against the outer side wall of the concrete - filled steel tube arch rib 12, and the top - moving wheel 25 and the rotating wheel 26 are used in combination to increase the sliding stability of the suspension seat 21 on the concrete - filled steel tube arch rib 12.

[0032] As shown in Figure 5 , Figure 6 , Figure 7 , Figure 8 and Figure 9As shown, the vertical traction platform 31 is slidably installed on the side of the transverse movement base 41. The transverse movement base 41 is horizontally slidably installed on the extension frame 27. The upper and lower ends of the vertical traction platform 31 are respectively connected to the suspension seat 21 and the moving base 51 through a set of steel wire ropes 32. Each set of steel wire ropes 32 has at least two. The other ends of the two sets of steel wire ropes 32 are respectively connected and wound on the upper take-up drum 44 and the lower take-up drum 52. The upper take-up drum 44 is rotatably connected to the swivel ring 43, and the swivel ring 43 is fixed to the side of the transverse movement base 41. The lower take-up drum 52 is rotatably connected to the moving base 51. Hydraulic motor VI and hydraulic motor VII for driving the rotation of the upper take-up drum 44 and the lower take-up drum 52 are respectively installed on the transverse movement base 41 and the moving base 51.

[0033] As Figure 5 and Figure 6 shown, a lead screw 28 and a hydraulic motor II 281 for driving the rotation of the lead screw 28 are installed on the extension frame 27. An internal thread sleeve 411 is fixedly installed in the middle of the transverse movement base 41. The internal thread sleeve 411 is in threaded transmission connection with the lead screw 28.

[0034] As Figure 7 shown, a plurality of counterweight blocks 53 are detachably and fixedly installed on the moving base 51. Lower moving wheels and a DC reduction motor for driving the rotation of the moving wheels are installed on the moving base 51. Utilizing the characteristic of the large starting torque of the DC reduction motor, the moving base 51 is driven to move intermittently and smoothly.

[0035] As Figure 3 、 Figure 4 、 Figure 5 and Figure 9 shown, a hook arm 35 is rotatably installed on the side of the vertical traction platform 31. A probe for monitoring the position of the through-strand 13 is installed on the hook arm 35. A chuck 36 for clamping the through-strand 13 is rotatably installed at the end of the hook arm 35, and a driving and controlling wheel 39 for pulling and transferring the end of the through-strand 13 to the through-channel 121 on the side of the concrete-filled steel tube arch rib 12 is also installed. The outer side surface of the driving and controlling wheel 39 protrudes from the surface of the hook arm 35 close to the chuck 36. An installation groove 354 is provided on the hook arm 35, and a hydraulic motor V 391 for driving the rotation of the driving and controlling wheel 39 is installed in the installation groove 354.

[0036] The specific details of using the through-strand auxiliary tensioning device for the concrete-filled steel tube tied arch bridge of the present application are as follows: I. Preparation before equipment use; First, according to the overall size and shape of the concrete-filled steel tube arch rib 12, a suitable suspension seat 21 and fastening arm 22 are selected; After that, according to the specifications of the through-strand 13, a suitable steel wire rope 32 is selected to ensure that the strength of the steel wire rope 32 can meet the tensile force requirements of the through-strand 13. One end of the through-strand 13 has formed a first anchorage end on the main girder 11. Then, through the following steps, the other end of the through-strand 13 is passed through the through-channel 121 on the concrete-filled steel tube arch rib 12, and then passed through and tensioned and fixed on the main girder 11 again to form a second anchorage end. Since the manual participation and the installation steps of the anchor box are reduced, the tensioning speed and accuracy of the through-strand can be improved.

[0037] 2. Pull the through-strand 13 from the main girder 11 towards the concrete-filled steel tube arch rib 12; First, start multiple hydraulic motors Ⅰ24, control the synchronous rotation of multiple upper moving wheels 25, move the suspension seat 21 to the corresponding position on the concrete-filled steel tube arch rib 12 where the through-channel 121 is provided, and correspondingly adjust the position of the moving base 51 to keep the suspension seat 21 above the moving base 51. After that, use the hook arm 35 and chuck 36 on one side to clamp the end of the through-strand 13; start the hydraulic motor Ⅱ281, hydraulic motor Ⅵ and hydraulic motor Ⅶ, and adjust the vertical position and horizontal position of the vertical traction platform 31 to make the end of the through-strand 13 close to the through-channel 121 on the concrete-filled steel tube arch rib 12.

[0038] 3. Pass the through-strand 13 through the through-channel 121; First, keep the state where the hook arm 35 and chuck 36 on this side clamp the end of the through-strand 13, and control the rotation of the hook arm 35 relative to the vertical traction platform 31 to finely adjust the position of the through-strand 13 so that the end of the through-strand 13 corresponds to the end of the through-channel 121. After that, control the driving wheel 39 to rotate, transfer the through-strand 13, and gradually insert it into the through-channel 121 on the concrete-filled steel tube arch rib 12 and pass through the through-channel 121.

[0039] 4. Pull the through-strand 13 from the concrete-filled steel tube arch rib 12 towards the main girder 11; Use the hook arm 35 and chuck 36 on the other side to clamp the end of the through-strand 13 after passing through the through-channel 121, start the hydraulic motor Ⅱ281, hydraulic motor Ⅵ and hydraulic motor Ⅶ, and adjust the vertical position and horizontal position of the vertical traction platform 31 to pull the through-strand 13 from the concrete-filled steel tube arch rib 12 towards the main girder 11 to form a second anchorage end.

[0040] When implementing the above solution of the present application, for the auxiliary tensioning operation of the through-strand 13 on the concrete-filled steel tubular tied arch bridge, after inserting the end of the through-strand 13 into one end of the through-channel 121, it is removed from the other end of the through-channel 121. During this process, two vertical traction platforms 31 are respectively located on both sides of the through-channel 121, and as Figure 4 shown, the hanging seat 21 is installed on one side of the concrete-filled steel tubular arch rib 12, and the through-channel 121 is arranged on the other side of the concrete-filled steel tubular arch rib 12, which will not cause construction interference due to the structure of the through-strand 13 itself, and the construction stability is good.

[0041] The present application combines the use of two hook arms 35 and chucks 36 to alternately clamp the end of the through-strand 13, as well as the vertical movement of the vertical traction platform 31 between the hanging seat 21 and the moving base 51, and the horizontal movement of the vertical traction platform 31 on the extension frame 27, to accurately transfer the end of the through-strand 13 to the strand tensioning device on the bridge deck, achieving the purpose of auxiliary tensioning of the through-strand 13. The through-strand 13 is installed between the main girder 11 and the concrete-filled steel tubular arch rib 12, replacing the traditional scheme using suspenders, reducing construction delays caused by the complex state of the strands, and thus improving the overall construction efficiency.

[0042] In addition, when using the above solution of the present application, the middle sides of the through-strand 13 are supported by the hook arms 35 and chucks 36 on both sides of the device. During the tensioning operation of the through-strand 13, the wear of the through-channel 121 on the side of the concrete-filled steel tubular arch rib 12 caused by the through-strand 13 can be effectively reduced.

[0043] To increase the stability of the clamping and transfer of the through-strand 13, as Figure 5 、 Figure 9 and Figure 12 shown, a plurality of anti-slip grooves 361 are provided on the side of the chuck 36 close to the hook arm 35, and a plurality of tooth-shaped grooves are provided on the outer side of the driving control wheel 39. The extending directions of the tooth-shaped grooves and the anti-slip grooves 361 are perpendicular to each other, so that on the basis of clamping the strand, the strand can be transferred deeper into the through-channel 121.

[0044] In this embodiment, the method of driving the hook arm 35 and the chuck 36 to rotate is as follows: a hydraulic motor Ⅳ 351 for driving the rotation of the hook arm 35 is installed in the vertical traction platform 31, and a hydraulic motor Ⅷ for driving the rotation of the chuck 36 is installed on the hook arm 35.

[0045] Embodiment 2: The same features as those in Embodiment 1 will not be described in detail. The different solution of this embodiment from Embodiment 1 is that as Figure 9 and Figure 10As shown, in this embodiment, the hydraulic motor Ⅳ351 is connected to the vertical traction platform 31 through the fitting ball 33. A spherical cavity 311 is integrally provided on the vertical traction platform 31. The fitting ball 33 is rotatably installed in the spherical cavity 311. The hydraulic motor Ⅳ351 is installed in the fitting ball 33. A U-shaped frame 332 is fixedly installed on the outer side of the fitting ball 33. The U-shaped frame 332 is rotatably connected to the hook arm 35.

[0046] As Figure 10 and Figure 11 shown, a turntable 34 and a hydraulic motor Ⅲ341 for driving the turntable 34 to rotate are installed in the vertical traction platform 31. A hinge seat Ⅰ331 and a hinge seat Ⅱ343 are respectively fixedly installed on the outer side of the fitting ball 33 and the bottom of the turntable 34. A hydraulic cylinder Ⅰ344 is rotatably installed on the hinge seat Ⅱ343. The movable end of the hydraulic cylinder Ⅰ344 is rotatably connected to the hinge seat Ⅰ331.

[0047] Start the hydraulic motor Ⅳ351 to control the rotation of the hook arm 35 on the U-shaped frame 332; start the hydraulic motor Ⅲ341 to control the rotation of the turntable 34, driving the hinge seat Ⅰ331, the limiting plate 342, the hinge seat Ⅱ343 and the fitting ball 33 to rotate together around the axis of the turntable 34; start the hydraulic cylinder Ⅰ344 to control the hinge seat Ⅱ343 to move towards or away from the hinge seat Ⅰ331, driving the fitting ball 33 to rotate in the spherical cavity 311. During this process, the fixed end and the movable end of the hydraulic cylinder Ⅰ344 are respectively rotatably connected to the hinge seat Ⅱ343 and the hinge seat Ⅰ331.

[0048] Compared with the rotation control method of the hook arm 35 in the first embodiment, by combining the above solutions, the upper end of the hook arm 35 has the ability to rotate in any direction relative to the spherical cavity 311, and due to the specific length dimension of the hook arm 35 itself, the rotation range of the lower end of the hook arm 35 in space is greatly increased; when the hook arm 35 and the chuck 36 are in the clamping state of the through-strand 13, relying on the large rotation range of the lower end of the hook arm 35 in space, the accurate spatial position adjustment of the hook arm 35 and the chuck 36 can be realized, and it has better adaptability to the through-strand 13 in an arc state on both sides of the through-channel 121 on the concrete-filled steel tube arch rib 12, ensuring the smooth progress of the subsequent construction process.

[0049] To ensure the stable operation of the hydraulic cylinder Ⅰ344, as Figure 11As shown, limiting plates 342 are fixedly installed on both sides of the bottom of the turntable 34, and the inner sides of the two limiting plates 342 are respectively abutted against the two ends of the hinge seat I 331; the movement range of the hinge seat I 331 is limited by the two limiting plates 342, so as to maintain the flush state of the side positions of the hinge seat I 331 and the hinge seat II 343, avoid the hydraulic cylinder I 344 being directly subjected to the pulling force perpendicular to its telescopic operation direction, reduce the occurrence of structural deformation of the hydraulic cylinder I 344 and damage of the seal, ensure the stable operation of the hydraulic cylinder I 344, and further improve the reliability and safety of the entire system.

[0050] Embodiment Three: The features identical to those of Embodiment One will not be described in detail herein. The difference between this embodiment and Embodiment One lies in that: as Figure 9 、 Figure 12 、 Figure 13 and Figure 14 shown, in this embodiment, an arc-shaped arm 362 is fixedly installed on the chuck 36. The arc-shaped arm 362 is in sliding connection with the chute I 352 in the chuck 36 in an embedded manner. A driving and controlling arm 363 is arranged at the end of the arc-shaped arm 362. The driving and controlling arm 363 is in sliding connection with the chute II 353 in the hook arm 35. A hydraulic cylinder II 38 is fixedly installed on the side of the hook arm 35 away from the chuck 36. The movable end of the hydraulic cylinder II 38 is rotatably installed with a hinge arm 37. The other end of the hinge arm 37 is in embedded and rotational connection with the driving and controlling arm 363.

[0051] Start the hydraulic cylinder II 38, control the movement of the end of the hinge arm 37, drive the arc-shaped arm 362 to slide in the chute I 352, and the driving and controlling arm 363 to slide in the chute II 353. During this process, the two ends of the hinge arm 37 rotate relative to the movable end of the hydraulic cylinder II 38 and the driving and controlling arm 363 respectively; Compared with the rotation control method of the chuck 36 in Embodiment One, in the above scheme of this embodiment, since the arc-shaped arm 362 is arc-shaped, the rotation center of the chuck 36 is located between the hook arm 35 and the chuck 36. Therefore, when clamping the through-strand 13, a cylindrical clamping area is formed between the hook arm 35 and the chuck 36, and the acting points applied to the outer side of the through-strand 13 can effectively cover most areas on the outer side of the through-strand 13, so as to effectively limit the crosstalk of the through-strand 13 and ensure the smooth progress of the subsequent process of transferring the through-strand 13 into the through-channel 121. The overall use effect of the equipment is good.

[0052] Embodiment Four: The features identical to those of Embodiment One will not be described in detail herein. The difference between this embodiment and Embodiment One lies in that: as Figure 9As shown in the figure, in this embodiment, the steel wire rope 32 is connected to the vertical traction platform 31 through the embedding block 321. The embedding block 321 is welded to the steel wire rope 32. The embedding block 321 is fitted and inserted into the vertical traction platform 31 and its position is locked by fasteners.

[0053] By disassembling the embedding block 321 from the vertical traction platform 31, the rapid replacement of the steel wire rope 32 is realized, so as to maintain the steel wire rope 32 that has been used for a long time. When performing auxiliary tensioning operations on the through steel strands 13 of different specifications, it can be ensured that the strength of the steel wire rope 32 can meet different traction force requirements, so as to ensure the safety and stability of construction.

[0054] Embodiment Five: The features identical to those of Embodiment One in this embodiment will not be described in detail. The different solution of this embodiment from Embodiment One is as follows: As Figure 5 and Figure 8 shown in the figure, in this embodiment, a docking end 42 is detachably and fixedly installed on the side of the transverse movement seat 41. The docking end 42 is provided with holes through which the steel wire ropes 32 pass. The number of holes is the same as the number of steel wire ropes 32. The docking end 42 plays a role in limiting the steel wire ropes 32 to prevent the steel wire ropes 32 from shaking horizontally, so as to limit the position of the vertical traction platform 31 on the side of the transverse movement seat 41.

[0055] As Figure 8 and Figure 10 shown in the figure, a convex pin 312 is fixedly installed on the side of the vertical traction platform 31, and a chute III 412 is provided on the side of the transverse movement seat 41. The convex pin 312 can be fitted and slidably connected with the chute III 412. Thus, when using the hook arm 35 and the chuck 36 to clamp and pull and transfer the through steel strands 13, during the fine adjustment process of the position of the vertical traction platform 31 on the side of the transverse movement seat 41, higher stability can be demonstrated; During this process, the end of the hook arm 35 rotates in a large range of space within the spherical cavity 311 and cooperates with the chuck 36 to precisely control the end position of the through steel strands 13, ensure the stable transmission of the acting force during its pulling and transfer process, and guarantee the accuracy and efficiency of the pulling and transfer operation of the through steel strands 13 at the through channel 121, so as to realize the auxiliary tensioning operation of the through steel strands 13 between the main beam 11 and the concrete-filled steel tube arch rib 12.

[0056] The above description is only a preferred embodiment of the present application and an explanation of the applied technical principles. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by the specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the technical solutions formed by mutually replacing the above features with other technical features (but not limited to) having similar functions disclosed in the present application.

[0057] Except for the technical features described in the specification, the remaining technical features are known to those skilled in the art. To highlight the innovative features of the present invention, the remaining technical features are not elaborated herein.

Claims

1. A device for auxiliary tensioning of a cross-through steel strand in a concrete-filled steel tube tied arch bridge, characterized in that, It comprises two movable bases (51) slidably mounted on the bridge deck at the side of the main beam (11), a suspension seat (21) slidably mounted on the steel tube concrete arch rib (12), and two vertical traction platforms (31) for traction of the through-wire strands (13) to move between the main beam (11) and the steel tube concrete arch rib (12); Two fastening arms (22) and two extension frames (27) are fixedly mounted on the suspension seat (21); pads (23) are arranged on the inner sides of the suspension seat (21) and the fastening arms (22); an upper moving wheel (25) is rotatably mounted on the suspension seat (21); the upper moving wheel (25) passes through the pads (23) and is connected to the outer side surface of the steel tube concrete arch rib (12) through friction transmission; The vertical traction platform (31) is slidably mounted on the side of the transverse seat (41), and the transverse seat (41) is horizontally slidably mounted on the extension frame (27). The upper and lower ends of the vertical traction platform (31) are respectively connected to the suspension seat (21) and the movable base (51) through a group of steel wire ropes (32), and each group of steel wire ropes (32) is provided with at least two. The other ends of the two groups of steel wire ropes (32) are respectively connected and wound on the upper winding drum (44) and the lower winding drum (52), and the upper winding drum (44) and the lower winding drum (52) are respectively rotatably connected to the transverse seat (41) and the movable base (51); A hook arm (35) is rotatably mounted on the side of the vertical traction platform (31), and a clamp (36) for clamping the through-wire strands (13) is rotatably mounted on the end of the hook arm (35), as well as a driving wheel (39) for pulling and transferring the end of the through-wire strands (13) to the through-wire channel (121) on the side of the steel tube concrete arch rib (12).

2. The auxiliary tensioning device for the through-strand of the concrete-filled steel tube tied arch bridge according to claim 1, wherein, The chuck (36) is fixedly mounted with an arc-shaped arm (362), which is slidably connected to a slide groove I (352) in the chuck (36). A drive control arm (363) is provided at the end of the arc-shaped arm (362), which is slidably connected to a slide groove II (353) in the hook arm (35). A hydraulic cylinder II (38) is fixedly mounted on the side of the hook arm (35) away from the chuck (36), and an articulated arm (37) is rotatably mounted on the movable end of the hydraulic cylinder II (38), and the other end of the articulated arm (37) is rotatably connected to the drive control arm (363).

3. The through - steel - strand assisted tensioning device for a concrete - filled steel tubular tied - arch bridge according to claim 1, characterized in that, A hydraulic motor IV (351) for driving the hook arm (35) to rotate is installed in the vertical traction platform (31).

4. The auxiliary tensioning device for the through-strand of the concrete-filled steel tube tied arch bridge according to claim 1, characterized in that, The hydraulic motor IV (351) is connected to the vertical traction platform (31) via a chimeric ball (33). A spherical cavity (311) is integrally provided on the vertical traction platform (31). The chimeric ball (33) is rotatably mounted in the spherical cavity (311). The hydraulic motor IV (351) is mounted in the chimeric ball (33). A U-shaped frame (332) is fixedly mounted on the outer side of the chimeric ball (33). The U-shaped frame (332) is rotatably connected to the hook arm (35).

5. The through-strand assisted tensioning device for the concrete-filled steel tube tied arch bridge according to claim 4, characterized in that, A turntable (34) and a hydraulic motor III (341) for driving the turntable (34) to rotate are installed in the vertical traction platform (31). A hinge seat I (331) and a hinge seat II (343) are respectively and fixedly installed on the outer side of the fitting ball (33) and the bottom of the turntable (34). A hydraulic cylinder I (344) is rotatably installed on the hinge seat II (343), and the movable end of the hydraulic cylinder I (344) is rotatably connected to the hinge seat I (331).

6. The assisted tensioning device for the cross-strand steel strands of the concrete-filled steel tube tied-arch bridge according to claim 1, characterized in that An arc-shaped edge (211) is integrally formed on the suspension seat (21), and the inner side surface of the arc-shaped edge (211) abuts against the outer side surface of the concrete-filled steel tube arch rib (12).

7. The auxiliary tensioning device for the steel tube concrete tied arch bridge according to claim 1, characterized in that, The steel wire rope (32) is connected to the vertical traction platform (31) through an insert block (321). The insert block (321) is welded to the steel wire rope (32), and the insert block (321) is in interference fit connection with the vertical traction platform (31) and is position-locked by a fastener.

8. The through-strand assisted tensioning device for the concrete-filled steel tube tied arch bridge according to claim 5, wherein, Limiting plates (342) are respectively and fixedly installed on both sides of the bottom of the turntable (34), and the inner sides of the two limiting plates (342) respectively abut against both ends of the hinge seat I (331).

9. The through - strand auxiliary tensioning device for a concrete - filled steel tube tied - arch bridge according to claim 1, wherein, A lead screw (28) and a hydraulic motor II (281) for driving the lead screw (28) to rotate are installed on the extension frame (27). An internal thread sleeve (411) is fixedly installed in the middle of the transverse movement seat (41), and the internal thread sleeve (411) is in threaded transmission connection with the lead screw (28).

10. The auxiliary tensioning device for the steel strand passing through the concrete-filled steel tube tied arch bridge according to claim 1, characterized in that, A docking end (42) is detachably and fixedly installed on the side of the transverse movement seat (41). A hole for the steel wire rope (32) to penetrate is provided on the docking end (42), and the number of the holes is the same as the number of the steel wire ropes (32). A convex pin (312) is fixedly installed on the side of the vertical traction platform (31), and a chute III (412) is provided on the side of the transverse movement seat (41). The convex pin (312) can be in interference fit sliding connection with the chute III (412).

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