Asymmetrically variable-width continuous beam trolley device and construction method

Abstract

The present application provides an asymmetric variable-width continuous beam hanging basket device, comprising a box beam that has been poured and completed, a walkable truss device arranged on the box beam, a suspension structure arranged at the front end of the walkable truss device, and an outer formwork structure arranged below the walkable truss device through the suspension structure. The suspension structure is provided with an outer formwork adjusting structure for adjusting the outer formwork structure in the transverse and longitudinal directions. By arranging the outer formwork adjusting structure, the formwork position can be automatically adjusted according to the construction width requirement, the purpose of variable-width box beam is achieved, the construction is simple, and the operation is convenient. In addition, the hanging basket walking, formwork widening and boom shifting are mainly completed by using a hydraulic system, and the degree of automation is high. The hanging basket has large bearing capacity and flexible arrangement, can adapt to the super-wide, asymmetric variable-width and multi-box concrete continuous beam cantilever pouring construction, and a plurality of diamond trusses walk automatically, the variable-width beam surface is self-adapting, the main truss of the hanging basket is always located at the center position of the box beam web, and the structure safety is beneficial.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of bridge construction, in particular to an asymmetric variable-width continuous beam hanging basket device and construction method. BACKGROUND

[0002] Continuous beam is the most common structure in bridge construction, and is the main construction method for large-span bridge construction. The hanging basket cantilever pouring construction can cross rivers, gorges and highways, and is not limited by the terrain and conditions under the bridge, is easy to operate, and does not require large lifting equipment during construction. However, the continuous beam construction hanging basket is a rear support point hanging basket, which runs along the bridge axis on the bridge deck, is suitable for small weight of cantilever pouring beam section, small beam width and equal-width single-box chamber box girder, and the cantilever pouring construction must be carried out symmetrically at both ends of the T-shaped structure.

[0003] The conventional method for the asymmetric, multi-box super-wide and variable-width continuous beam bridge currently encountered at home and abroad is the scaffolding cast-in-place construction method. The scaffolding cast-in-place construction method has large material consumption, large construction equipment investment, high construction cost and long construction period. If the bridge height is large or the terrain under the bridge is complex, the scaffolding erection is more difficult, and the construction safety risk is higher. Therefore, an asymmetric variable-width continuous beam hanging basket device and construction method are proposed to solve the above problems. SUMMARY

[0004] The main purpose of the present application is to provide an asymmetric variable-width continuous beam hanging basket device and construction method, which solves the problem of how to use the hanging basket cantilever pouring construction method in the asymmetric variable-width multi-box concrete continuous beam construction.

[0005] To solve the above technical problems, the technical scheme adopted by the present application is: an asymmetric variable-width continuous beam hanging basket device, comprising a box girder that has been poured, a walkable truss device arranged on the box girder, a suspension structure arranged at the front end of the walkable truss device, and an outer formwork structure arranged below the walkable truss device through the suspension structure, wherein the suspension structure is provided with an outer formwork adjusting structure for adjusting the outer formwork structure in the transverse and longitudinal directions.

[0006] In a preferred scheme, the walkable truss device is composed of a load-bearing truss, a walking system and an anchoring system;

[0007] The load-bearing truss is composed of a plurality of diamond trusses arranged on the box girder, and the plurality of diamond trusses are connected through a middle portal arranged in the middle, wherein the outermost diamond truss is slidably hinged with the middle portal;

[0008] The walking system comprises a plurality of tracks corresponding in number to the diamond trusses and arranged on the top web of the box girder, a plurality of sliding shoes arranged at the bottom of the diamond trusses and slidably connected with the corresponding tracks, and walking oil cylinders arranged at both ends of the tracks and the diamond trusses, respectively, wherein the outermost track is arranged in a straight line.

[0009] The anchoring system is an anchor rod arranged at the tail of the walkable truss device, which is anchored with the box girder.

[0010] In the preferred embodiment, the suspension structure comprises a front upper beam arranged transversely at the top of the front ends of the plurality of diamond trusses, a front lower beam suspended below the front upper beam by a front suspender, a rear lower beam suspended below the middle portal by a rear suspender, a bottom basket longitudinal beam arranged at the top of the front lower beam and the rear lower beam, and a bottom platform arranged at the bottom of the front lower beam and the rear lower beam, wherein the outermost diamond truss is slidably hinged with the front upper beam, and the tail of the bottom platform is anchored with the box girder.

[0011] The hanger holes at the two ends of the middle portal and the front upper beam are transverse slot holes, and the two ends of the middle portal and the front upper beam are further provided with hydraulic oil cylinders for pushing the rear suspender and the front suspender.

[0012] In the preferred embodiment, the outer formwork structure comprises a bottom formwork body arranged on the suspension structure and located at the bottom of the box girder, an outer guide beam suspended at the front end of the suspension structure and anchored at the tail with the box girder, and a side formwork body arranged on both sides of the box girder, and the outer guide beam passes through the side formwork body to play a load-bearing role.

[0013] In the preferred embodiment, the outer formwork adjusting structure comprises a plurality of outer guide beam adjusting assemblies suspended on the suspension structure and the box girder, the outer guide beam adjusting assembly comprises a U-shaped suspension bracket for suspension, a horizontal moving frame slidably arranged on the bottom plate of the U-shaped suspension bracket, a jacking oil cylinder arranged on the horizontal moving frame, and a horizontal moving oil cylinder arranged on the side wall of the U-shaped suspension bracket for pushing the horizontal moving frame to move horizontally, and the outer guide beam is fixedly arranged on the output shaft of the jacking oil cylinder.

[0014] In the preferred embodiment, the top of each side plate of the U-shaped suspension bracket is provided with an anchoring member for suspension, the two side walls of the bottom plate of the U-shaped suspension bracket are provided with sliding grooves, the bottom of the horizontal moving frame is provided with a T-shaped groove matched with the bottom plate of the U-shaped suspension bracket and the sliding grooves, the cylinder body of the jacking oil cylinder passes through a horizontal moving groove arranged on the bottom plate of the U-shaped suspension bracket, the cylinder body of the horizontal moving oil cylinder is fixedly arranged in the side plate of the U-shaped suspension bracket, and the cylinder body of the jacking oil cylinder is fixedly arranged on the horizontal moving frame.

[0015] In the preferred embodiment, the outer formwork adjusting structure further comprises a support adjusting assembly arranged on the suspension structure to support the side formwork body, the support adjusting assembly comprises two sliding rails fixedly arranged on the bottom basket of the suspension structure, a moving platform slidably arranged on the two sliding rails, a moving oil cylinder arranged at the tail end of the sliding rail, a plurality of moving seats slidably arranged on the moving platform, and an outer form servo cylinder arranged on the moving seat through a universal joint, the outer form servo cylinder is hinged with the side formwork body through the universal joint, and the moving seat and the moving platform are fixed through a throughly arranged screw-nut assembly.

[0016] In the preferred solution, the moving platform is composed of an I-beam and sliding seats fixed on both sides of the bottom of the I-beam, the sliding seats are provided with cross grooves in sliding connection with the sliding rails, the cross grooves are provided with pulleys in contact with the top of the sliding rails, and the I-beam is uniformly provided with a plurality of through holes for the screw-nut assemblies to pass through.

[0017] The moving seat is provided with a T-shaped sliding groove in sliding connection with the I-beam, and the two side walls of the moving seat are provided with insertion holes for the screw-nut assemblies to pass through.

[0018] In the preferred solution, the inner formwork structure further includes an inner box guide beam with a front end suspended on the suspension structure and an anchor end fixed on the box girder, a support frame body erected on the inner box guide beam, a support oil cylinder and an inner formwork servo cylinder which are hingedly arranged outside the support frame body, and an inner formwork main body hingedly connected to output shafts of the support oil cylinder and the inner formwork servo cylinder.

[0019] The method comprises:

[0020] S1, installing the walkable truss device on the box girder, and cantilever casting construction of the equal-width beam segment hanging basket;

[0021] S2, placing a diagonal straight line walking track on the top surface of the box girder web according to the slope of the widening of the wide beam segment, and anchoring the track;

[0022] S3, installing a suspension structure on the walkable truss device, and lowering the outer formwork structure and the inner formwork structure through the suspension structure, and releasing the anchoring system at the rear end of the walkable truss device; the walkable truss device automatically walks along the track to the designated position, and anchors the tail anchor rod of the walkable truss device;

[0023] S4, starting the synchronous movement of the support adjusting assembly and the outer guide beam adjusting assembly to adjust the lateral movement and vertical movement of the side formwork main body, and then moving the formwork main body to the designed widening position, thereby realizing the widening of the box girder with the bottom formwork main body widened and the widening of the box girder with the flange plate widened, and then binding the steel bars;

[0024] S5, starting the support oil cylinder and the inner formwork servo cylinder in the inner formwork structure to complete the installation of the inner formwork main body,

[0025] S6, synchronously pouring the box girder concrete on both sides of the T structure, synchronously adding counterweights on the non-widening side of the T structure, the weight being equal to the added concrete weight of the widening section, and then sequentially performing concrete curing and prestress tensioning;

[0026] S7, repeating the steps S3-S7 to perform the widening segment hanging basket cantilever casting construction until the closure segment construction is completed.

[0027] The application provides an asymmetric variable-width continuous beam hanging basket device and a construction method. BRIEF DESCRIPTION OF DRAWINGS

[0028] The application will be further described below in combination with the drawings and examples:

[0029] Figure 1 is a front end face structure diagram of the widening section hanging basket of the application;

[0030] Figure 2 is a side face structure diagram of the hanging basket of the application;

[0031] Figure 3 is a rear end face structure diagram of the widening section hanging basket of the application;

[0032] Figure 4 is a walking system structure diagram of the application;

[0033] Figure 5 is a horizontal widening structure diagram of the outer formwork structure of the application;

[0034] Figure 6 is a vertical widening structure diagram of the outer formwork structure of the application;

[0035] Figure 7 is a track distribution structure diagram of the application;

[0036] Figure 8 is a support adjusting assembly structure diagram of the application;

[0037] Figure 9 is a connection structure diagram of the slide rail and the moving oil cylinder of the application;

[0038] Figure 10 is a moving platform structure diagram of the application;

[0039] Figure 11 is a front view of the moving platform structure of the application;

[0040] Figure 12 is a moving seat structure diagram of the application;

[0041] Figure 13 is a connection structure diagram of the outer guide beam adjusting assembly and the outer guide beam of the application;

[0042] Figure 14 This is a structural diagram of the outer guide beam adjustment assembly of the present invention;

[0043] Figure 15 This is a structural diagram of the U-shaped suspension frame of the present invention;

[0044] Figure 16 This is a structural diagram of the transverse moving frame of the present invention;

[0045] In the diagram: 1. Box girder; 2. Movable truss device; 201. Track; 202. Diamond truss; 203. Slipper; 204. Movable cylinder; 205. Middle gantry; 206. Anchor bolt; 3. Suspension structure; 301. Front upper crossbeam; 302. Front hanger; 303. Front lower crossbeam; 304. Rear lower crossbeam; 305. Bottom platform; 306. Bottom basket longitudinal beam; 307. Rear hanger; 308. Outer guide beam; 4. Outer formwork structure; 401. Bottom formwork main body; 402. Side formwork main body; 5. Outer formwork adjustment structure; 501. Support adjustment assembly; 502. Outer guide beam adjustment assembly; 5021. U-shaped suspension frame; 5022. Lateral movement groove; 5023. Slide groove; 5024. Lateral movement frame; 5025. Lifting cylinder; 5026. Lateral movement cylinder; 5027. Anchor bolt; 5028. T-slot; 503 slide rail; 504 moving cylinder; 505 moving platform; 5051 I-beam; 5052 sliding seat; 5053 cross groove; 5054 pulley; 5055 through hole; 506 moving seat; 5062 T-slot; 5063 insertion hole; 5064 universal joint; 507 external mold servo electric cylinder; 508 screw and nut assembly; 6 internal template structure; 601 internal box guide beam; 602 support frame; 603 internal mold servo electric cylinder; 604 support cylinder; 605 internal template body. Detailed Implementation

[0046] Example 1

[0047] like Figures 1-16 As shown, the asymmetric widening continuous beam hanging basket device includes a pre-cast box girder 1, a walkable truss device 2 set on the box girder 1, a suspension structure 3 set at the front end of the walkable truss device 2, and an outer formwork structure 4 set below the walkable truss device 2 via the suspension structure 3. The suspension structure 3 is equipped with an outer formwork adjustment structure 5. By adjusting the outer formwork structure 4 laterally and longitudinally through the outer formwork adjustment structure 5, the effect of widening the continuous beam during casting can be achieved.

[0048] In the preferred embodiment, the walkable truss device 2 consists of a load-bearing truss, a walking system, and an anchoring system;

[0049] The load-bearing truss is composed of a plurality of diamond trusses 202 arranged on the box girder 1, and the number of the diamond trusses 202 in the embodiment is five. The five diamond trusses 202 are connected through a middle portal 205 fixedly arranged in the middle. The outermost diamond truss 202 is slidably hinged with the middle portal 205, so as to facilitate the outward movement of the outermost diamond truss 202.

[0050] The walking system includes five rails 201 corresponding to the diamond trusses 202 and arranged on the top web plate of the box girder 1, sliding shoes 203 fixedly arranged at the bottom of the diamond trusses 202 and slidably connected with the corresponding rails 201, and walking oil cylinders 204 hingedly connected at both ends of the rails 201 and the diamond trusses 202. The outermost rail 201 is arranged in a slanting straight line. In use, the diamond trusses 202 are synchronously moved on the rails 201 by the power of the walking oil cylinders 204, and the slanting straight arrangement of the rails 201 facilitates the outward movement of the outermost diamond truss 202, thereby achieving the effect of expanding the width of the basket.

[0051] The anchoring system is an anchor rod 206 arranged at the tail of the walkable truss device 2, and the anchor rod 206 is anchored with the box girder 1.

[0052] In the preferred embodiment, the suspension structure 3 includes a front upper cross beam 301 transversely fixedly arranged at the top of the front end of the five diamond trusses 202, a front lower cross beam 303 suspended below the front upper cross beam 301 through a front suspender 302, a rear lower cross beam 304 suspended below the middle portal 205 through a rear suspender 307, a bottom basket longitudinal beam 306 fixedly arranged at the top of the front lower cross beam 303 and the rear lower cross beam 304, and a bottom platform 305 fixedly arranged at the bottom of the front lower cross beam 303 and the rear lower cross beam 304. The outermost diamond truss 202 is slidably hinged with the front upper cross beam 301, so as to facilitate the outward movement of the outermost diamond truss 202. The tail of the bottom platform 305 is anchored with the box girder 1.

[0053] The middle portal 205 and the front upper cross beam 301 are respectively provided with suspender holes for suspending the rear suspender 307 and the front suspender 302. The suspender holes at both ends of the middle portal 205 and the front upper cross beam 301 are transverse slot holes, and hydraulic oil cylinders for pushing the rear suspender 307 and the front suspender 302 are further arranged at both ends of the middle portal 205 and the front upper cross beam 301. Therefore, the rear suspender 307 and the front suspender 302 can be pushed to move transversely in the transverse slot holes through the power of the hydraulic oil cylinders, and the suspension position can be adjusted transversely according to the requirement of widening the continuous beam.

[0054] In the preferred embodiment, the outer formwork structure 4 comprises a bottom formwork body 401 arranged on the suspension structure 3 and at the bottom of the box girder 1, an outer guide beam 308 suspended at the front end of the suspension structure 3 and anchored at the tail end of the box girder 1, and side formwork bodies 402 arranged on both sides of the box girder 1, wherein the outer guide beam 308 passes through the side formwork bodies 402 to bear the load, and the bottom formwork body 401 is arranged on the bottom basket longitudinal beam 306.

[0055] In the preferred embodiment, the outer formwork adjusting structure 5 comprises a plurality of outer guide beam adjusting assemblies 502 suspended on the suspension structure 3 and the box girder 1, and the number of the outer guide beam adjusting assemblies 502 can be adjusted according to actual conditions, and the minimum number is two, one of which is suspended below the front upper cross beam 301 through the front lifting rod 302, and the other is suspended below the box girder 1, supporting the outer guide beam 308 from the front and rear ends, the outer guide beam adjusting assembly 502 comprises a U-shaped suspension bracket 5021 for suspension, a transverse moving frame 5024 slidably arranged on the bottom plate of the U-shaped suspension bracket 5021, a jacking oil cylinder 5025 arranged on the transverse moving frame 5024, and a transverse moving oil cylinder 5026 arranged on the side wall of the U-shaped suspension bracket 5021 for pushing the transverse moving frame 5024 to move transversely, and the outer guide beam 308 is fixedly arranged on the output shaft of the jacking oil cylinder 5025.

[0056] In the preferred embodiment, the top of each side plate of the U-shaped suspension bracket 5021 is welded with an anchor 5027 for suspension, so that the anchor rod can pass through the anchor 5027 to be fixed, and the two side walls of the bottom plate of the U-shaped suspension bracket 5021 are provided with a sliding groove 5023, and the bottom of the transverse moving frame 5024 is provided with a T-shaped groove 5028 matched with the bottom plate of the U-shaped suspension bracket 5021 and the sliding groove 5023, so that the transverse moving frame 5024 slides on the U-shaped suspension bracket 5021, and the T-shaped design facilitates the stability during sliding, and the bottom plate of the U-shaped suspension bracket 5021 is further provided with a transverse moving groove 5022 for the cylinder body of the jacking oil cylinder 5025 to pass through, the cylinder body of the transverse moving oil cylinder 5026 is fixedly arranged in the side plate of the U-shaped suspension bracket 5021, and the cylinder body of the jacking oil cylinder 5025 is fixedly arranged on the transverse moving frame 5024, so that when the transverse moving frame 5024 slides on the U-shaped suspension bracket 5021, the jacking oil cylinder 5025 slides in the transverse moving groove 5022.

[0057] It should be noted that the front U-shaped suspension bracket 5021 is suspended below the front upper cross beam 301 through the two front lifting rods 302, and the two front lifting rods 302 are located in the transverse slot holes of the lifting holes.

[0058] In use, the transverse frame 5024 is slid on the U-shaped suspension frame 5021 by the power of the transverse oil cylinder 5026 to adjust the position of the outer guide beam 308, thereby achieving the effect of transversely moving the side formwork body 402, so as to widen the bottom formwork body 401. The position of the outer guide beam 308 can be adjusted longitudinally by the power of the jacking oil cylinder 5025, thereby achieving the effect of longitudinally moving the side formwork body 402, so as to widen the flange plate.

[0059] In a preferred embodiment, the outer formwork adjusting structure 5 further comprises a support adjusting assembly 501 arranged on the suspension structure 3 to support the side formwork body 402. The support adjusting assembly 501 comprises two slide rails 503 fixed on the bottom basket of the suspension structure 3, a moving platform 505 slidably arranged on the two slide rails 503, a moving oil cylinder 504 fixed on the tail end of the slide rail 503, a plurality of moving seats 506 slidably arranged on the moving platform 505, and an outer form servo cylinder 507 hingedly arranged on the moving seat 506 through a universal joint 5064. The outer form servo cylinder 507 is hingedly connected to the side formwork body 402 through the universal joint 5064. The moving seat 506 and the moving platform 505 are fixed through a throughly arranged screw-nut assembly 508.

[0060] It should be noted that the two slide rails 503 of the support adjusting assembly 501 are fixed on the rear lower cross beam 304 and the front lower cross beam 303.

[0061] The moving platform 505 is composed of an I-beam 5051 and slide seats 5052 fixed on both sides of the bottom of the I-beam 5051. The slide seats 5052 are provided with cross grooves 5053 slidably connected with the slide rails 503. The cross grooves 5053 are provided with pulleys 5054 rotatably arranged above the cross grooves 5053 and in contact with the top of the slide rails 503, so as to improve the sliding efficiency through the contact between the pulleys 5054 and the slide rails 503. The I-beam 5051 is uniformly provided with a plurality of through holes 5055 for the screw-nut assembly 508 to pass through.

[0062] The moving seat 506 is provided with T-shaped sliding grooves 5062 slidably connected with the I-beam 5051. The two side walls of the moving seat 506 are provided with insertion holes 5063 for the screw-nut assembly 508 to pass through. The screw rod of the screw-nut assembly 508 passes through the through holes 5055 and the insertion holes 5063 to fix the moving seat 506. Finally, the fixed effect is achieved through the threaded nut.

[0063] In use, the moving platform 505 is moved on the slide rail 503 by the power of the oil cylinder 504 to achieve the effect of adjusting the side formwork body 402 laterally, and the side formwork body 402 can be adjusted vertically by the extension and retraction of the outer formwork servo cylinder 507, and the stability of the widening of the side formwork body 402 is improved by the double adjustment of the outer girder adjusting assembly 502 and the support adjusting assembly 501.

[0064] In the preferred embodiment, the inner formwork structure 6 is further included, the inner formwork structure 6 includes an inner box girder 601 suspended at the front end on the suspension structure 3 and anchored at the rear end on the box girder 1, a support frame 602 erected on the inner box girder 601, a support oil cylinder 604 and an inner formwork servo cylinder 603 hingedly arranged outside the support frame 602, and an inner formwork body 605 hingedly arranged on the output shafts of the support oil cylinder 604 and the inner formwork servo cylinder 603, and the inner formwork body 605 can be installed and removed by the power of the support oil cylinder 604 and the inner formwork servo cylinder 603.

[0065] It should be noted that the inner formwork servo cylinder 603 and the outer formwork servo cylinder 507 are both T-shaped servo electric cylinders with self-locking function, which can support the inner formwork body 605 and the side formwork body 402.

[0066] Embodiment 2

[0067] Further illustrated in combination with Embodiment 1, as shown in the structure, the method comprises: Figures 1-16

[0068] S1, installing the walkable truss device 2 on the box girder 1, and cantilever casting construction of the equal-width beam segment hanging basket;

[0069] S2, placing a diagonal straight track 201 on the top surface of the web plate of the box girder 1 according to the slope of the widening of the wide beam segment, and anchoring the track 201;

[0070] S3, installing the suspension structure 3 on the walkable truss device 2, and placing the outer formwork structure 4 and the inner formwork structure 6 through the suspension structure 3, and releasing the anchoring system at the rear end of the walkable truss device 2; the walkable truss device 2 automatically walks along the track 201 to the designated position, and the tail anchor rod of the walkable truss device 2 is anchored;

[0071] S4, starting the synchronous movement of the support adjusting assembly 501 and the outer girder adjusting assembly 502 to adjust the lateral movement and vertical movement of the side formwork body 402, and then moving the formwork body 402 to the designed widening position to achieve the widening of the box girder and the widening of the flange plate by the bottom formwork body 401, and then binding the steel bars;

[0072] S5, starting the support oil cylinder 604 and the inner formwork servo cylinder 603 in the inner formwork structure 6 to complete the installation of the inner formwork body 605,​

[0073] S6, synchronously pouring the box girder concrete on both sides of the T-shaped structure of the box girder 1, synchronously increasing the weight on the non-widened side of the T-shaped structure, and the weight is the increased concrete weight of the widened section, and then sequentially performing concrete curing and prestress tensioning;

[0074] S7, repeating the steps S3-S7 to perform the widened section hanging basket cantilever pouring construction until the closure section construction is completed.

Claims

1. An asymmetric variable-width continuous beam trolley device, comprising a completed box girder (1), a walkable truss device (2) arranged on the box girder (1), a suspension structure (3) arranged at the front end of the walkable truss device (2), and an outer formwork structure (4) arranged below the walkable truss device (2) through the suspension structure (3), characterized in that: The suspension structure (3) is provided with an outer formwork adjusting structure (5) for transversely and longitudinally adjusting the outer formwork structure (4); The outer formwork structure (4) comprises a bottom formwork body (401) erected on the suspension structure (3) and located at the bottom of the box girder (1), an outer guide beam (308) suspended at the front end of the suspension structure (3) and anchored at the tail end of the box girder (1), and side formwork bodies (402) erected on both sides of the box girder (1), the outer guide beam (308) passing through the side formwork bodies (402) to play a role of bearing; The outer formwork adjusting structure (5) comprises a plurality of outer guide beam adjusting assemblies (502) suspended on the suspension structure (3) and the box girder (1), the outer guide beam adjusting assembly (502) comprising a U-shaped suspension bracket (5021) for suspension, a transverse moving frame (5024) slidably arranged on the bottom plate of the U-shaped suspension bracket (5021), a jacking oil cylinder (5025) arranged on the transverse moving frame (5024), and a transverse moving oil cylinder (5026) arranged on the side wall of the U-shaped suspension bracket (5021) for pushing the transverse moving frame (5024) to move transversely, and the outer guide beam (308) is fixedly arranged on the output shaft of the jacking oil cylinder (5025).

2. The asymmetrically variable-width continuous beam trolley device of claim 1, wherein: The walkable truss device (2) is composed of a bearing truss, a walking system and an anchoring system; The bearing truss is composed of a plurality of diamond trusses (202) arranged on the box girder (1), and the plurality of diamond trusses (202) are connected through a middle portal frame (205) arranged in the middle, wherein the outermost diamond truss (202) is slidably hinged between the middle portal frame (205); The walking system comprises a plurality of tracks (201) corresponding in number to the diamond trusses (202) and arranged on the top web plate of the box girder (1), a plurality of sliding shoes (203) arranged at the bottom of the diamond trusses (202) and slidably connected with the corresponding tracks (201), and a plurality of walking oil cylinders (204) arranged at both ends of the tracks (201) and the diamond trusses (202), respectively, the outermost track (201) being arranged in a straight line obliquely; The anchoring system is an anchor rod (206) arranged at the tail of the walkable truss device (2), and the anchor rod (206) is anchored to the box girder (1).

3. The asymmetric variable-width continuous beam trolley device of claim 2, wherein: The suspension structure (3) comprises a front upper cross beam (301) transversely arranged at the top of the front end of the plurality of diamond trusses (202), a front lower cross beam (303) suspended below the front upper cross beam (301) through a front lifting rod (302), a rear lower cross beam (304) suspended below the middle portal frame (205) through a rear lifting rod (307), a bottom basket longitudinal beam (306) arranged at the top of the front lower cross beam (303) and the rear lower cross beam (304), and a bottom platform (305) arranged at the bottom of the front lower cross beam (303) and the rear lower cross beam (304), wherein the outermost diamond truss (202) is slidably hinged with the front upper cross beam (301), and the tail of the bottom platform (305) is anchored to the box girder (1). The lifting holes at both ends of the middle door frame (205) and the front upper cross beam (301) are transverse slot holes, and the two ends of the middle door frame (205) and the front upper cross beam (301) are further provided with hydraulic oil cylinders for pushing the rear lifting rod (307) and the front lifting rod (302).

4. The asymmetric variable-width continuous beam trolley device of claim 3, wherein: The top of each side plate of the U-shaped suspension frame (5021) is provided with an anchor (5027) for suspension, the two side walls of the bottom plate of the U-shaped suspension frame (5021) are each provided with a sliding groove (5023), the bottom of the transverse moving frame (5024) is provided with a T-shaped groove (5028) matched with the bottom plate of the U-shaped suspension frame (5021) and the sliding groove (5023), and the bottom plate of the U-shaped suspension frame (5021) is further provided with a transverse moving groove (5022) through which the cylinder body of the jacking oil cylinder (5025) passes, and the cylinder body of the transverse moving oil cylinder (5026) is fixedly arranged in the side plate of the U-shaped suspension frame (5021), and the cylinder body of the jacking oil cylinder (5025) is fixedly arranged on the transverse moving frame (5024).

5. The asymmetric variable-width form traveler of claim 4, wherein: The outer mold plate adjusting structure (5) further comprises a support adjusting assembly (501) arranged on the suspension structure (3) to support the side mold plate body (402), the support adjusting assembly (501) comprises two slide rails (503) fixedly arranged on the rear lower cross beam (304) and the front lower cross beam (303), a moving platform (505) slidably arranged on the two slide rails (503), a moving oil cylinder (504) arranged at the tail end of the slide rail (503), a plurality of moving seats (506) slidably arranged on the moving platform (505), and an outer mold servo cylinder (507) hingedly arranged on the moving seat (506) through a universal joint (5064), the outer mold servo cylinder (507) is hingedly connected with the side mold plate body (402) through the universal joint (5064), and the moving seat (506) and the moving platform (505) are fixedly connected through a penetratingly arranged screw nut assembly (508).

6. The asymmetric variable-width form traveler of claim 5, wherein: The moving platform (505) is composed of an I-shaped steel (5051) and sliding seats (5052) fixedly arranged on both sides of the bottom of the I-shaped steel (5051), the sliding seat (5052) is provided with a cross groove (5053) slidably connected with the slide rail (503), the upper side of the cross groove (5053) is provided with a pulley (5054) in contact with the top of the slide rail (503), and the I-shaped steel (5051) is uniformly provided with a plurality of through holes (5055) through which the screw nut assembly (508) passes. The moving seat (506) is provided with a T-shaped sliding groove (5062) slidably connected with the I-shaped steel (5051), and the two side walls of the moving seat (506) are each provided with a plug hole (5063) through which the screw nut assembly (508) passes.

7. The asymmetric variable-width form traveler of claim 5, wherein: The inner formwork structure (6) comprises an inner box guide beam (601) suspended at the front end on the suspension structure (3) and anchored at the rear end on the box girder (1), a support frame (602) erected on the inner box guide beam (601), a support oil cylinder (604) and an inner formwork servo cylinder (603) hingedly arranged outside the support frame (602), and an inner formwork plate body (605) hingedly arranged on output shafts of the support oil cylinder (604) and the inner formwork servo cylinder (603).

8. The construction method of the asymmetric variable-width continuous beam trolley device according to claim 7, characterized in that: The construction method comprises: S1, installing the walkable truss device (2) on the box girder (1), and performing equal-width beam segment hanging basket cantilever pouring construction; S2, placing a slanted straight track (201) on the top surface of the web plate of the box girder (1) according to the slope of the widening of the wide beam segment, and anchoring the track (201); S3, installing the suspension structure (3) on the walkable truss device (2), and lowering the outer formwork structure (4) and the inner formwork structure (6) through the suspension structure (3), and releasing the anchoring system at the rear end of the walkable truss device (2); the walkable truss device (2) automatically walks along the track (201) to the designated position, and the tail anchor rod of the walkable truss device (2) is anchored; S4, starting the synchronous movement of the support adjusting assembly (501) and the outer guide beam adjusting assembly (502) to adjust the lateral movement and vertical movement of the side formwork body (402), and then moving the formwork body (402) to the designed widening position, so as to realize the widening of the box girder and the widening of the flange plate by the bottom formwork body (401), and then binding the steel bars; S5, starting the support oil cylinder (604) and the inner formwork servo cylinder (603) in the inner formwork structure (6) to complete the installation of the inner formwork plate body (605); S6, synchronously pouring the box girder concrete on both sides of the T-shaped structure of the box girder (1), synchronously adding counterweights on the non-widening side of the T-shaped structure, and the weight is equal to the added concrete weight of the widening section, and then sequentially performing concrete curing and prestress tensioning; S7, repeating the steps S3-S6 to perform the widening segment hanging basket cantilever pouring construction until the closure segment construction is completed.

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