CN216663826U

CN216663826U - Cast-in-place three-wall movable formwork for fully-closed sound barrier bridge

Info

Publication number: CN216663826U
Application number: CN202122779637.3U
Authority: CN
Inventors: 杨凯; 史涛; 薛智峰; 汝旭坤
Original assignee: First Engineering Co Ltd of China Railway No 12 Bureau Group Co Ltd
Current assignee: First Engineering Co Ltd of China Railway No 12 Bureau Group Co Ltd
Priority date: 2021-11-15
Filing date: 2021-11-15
Publication date: 2022-06-03
Anticipated expiration: 2031-11-15

Abstract

The utility model belongs to the technical field of bridge wing plate cast-in-place for high-speed rails, in particular to a full-closed sound barrier bridge cast-in-place three-wall movable formwork, which solves the technical problems in the background technology and comprises a walking unit and a formwork unit, wherein the walking unit is positioned on the top surface of a bridge at the inner side of a wing plate; the template unit includes the fender tiny fragments of stone, etc. wall form, the vertical wall template, first sunshade foundation template and second sunshade foundation template, it has first template main longitudinal beam and second template main longitudinal beam to support on the horizontal girder of frame, several template time crossbeam has been linked firmly on the first template main longitudinal beam, every template time crossbeam all through flexible jib respectively with keep off tiny fragments of stone, etc. wall form and first sunshade foundation template are connected, second template main longitudinal beam is connected with second sunshade foundation template through many flexible jibs, still linked firmly external operation platform on the horizontal girder of frame. The device integrated structure has saved the process that the template was dismantled and was installed repeatedly, has practiced thrift the engineering time for the construction progress.

Description

Cast-in-place three-wall movable formwork for fully-closed sound barrier bridge

Technical Field

The utility model belongs to the technical field of three-wall cast-in-place on a bridge wing plate for a high-speed rail, and relates to a three-wall casting template on the top of the wing plate, in particular to a three-wall movable formwork for the cast-in-place of a fully-closed sound barrier bridge.

Background

A through bridge 2209 type prefabricated post-tensioning simply-supported bridge is a novel bridge adopted by high-speed railways in China, and a sound barrier is arranged on a bridge wing plate for preventing and reducing driving noise. Usually, the sound barrier embedded parts are embedded on bridge wing plates, then the sound barrier foundation is cast in situ, and the wing plates are required to be provided with ballast blocking walls, vertical walls located between the sound barrier embedded parts and a shield foundation. At present, a template system adopted by the cast-in-place construction of the totally-enclosed sound barrier foundation of the high-speed railway usually needs to depend on a ballast retaining wall as a support, so that the ballast retaining wall needs to be constructed firstly, and the construction process is complicated; if the template is not required to be installed on the ballast retaining wall, temporary supports such as reinforcing steel bars need to be driven into the beam surface, or the existing reinforcing steel bars on the ballast retaining wall are utilized to pull and support the first shield plate foundation template, so that beam surface concrete is likely to be damaged or the ballast retaining wall concrete is damaged, and the shield plate side templates are positioned in the high altitude outside the boundary beam, so that the template is not convenient to install and adjust due to lack of operation space, after the last construction section is completed, a template removing system is required to move to the next construction section, the template is a steel template, the number of components is large, the number of disassembling and installing processes is large, and the labor and time are wasted due to repeated disassembling and installing; meanwhile, the defects that the space for supporting operation by using a crane is not enough, the operation difficulty on the main traffic trunk in cities and towns is high and the like exist.

Disclosure of Invention

The utility model aims to solve the technical problems that the three walls cannot be poured simultaneously, the beam surface concrete is easy to damage or the reinforcing steel bars of the ballast retaining wall are easy to deform when the existing template is used for pouring, the processes of disassembly and assembly are multiple, the repeated disassembly and assembly wastes manpower and time, the operable space is lacked, the operation difficulty is high and the like, and provides the cast-in-situ three-wall movable formwork for the totally-closed sound barrier bridge.

The technical means for solving the technical problems of the utility model is as follows: the totally-enclosed sound barrier bridge cast-in-place three-wall movable formwork comprises a plurality of walking units and template units, wherein adjacent walking units are longitudinally arranged in a line along a bridge and are mutually connected, the walking units are positioned on the top surface of the bridge at the inner side of a wing plate, the walking units are provided with at least two transverse frame main beams, the outer end parts of the transverse frame main beams cross the wing plate and then extend out of the wing plate, the walking units are provided with balance weights, and the walking units are provided with driving assemblies and control boxes for controlling the driving assemblies to operate; the template unit comprises a ballast wall template and a vertical wall template which are positioned at the top of the wing plate, the first curtain board foundation template and the second curtain board foundation template are positioned outside the wing plate, a first template main longitudinal beam and a second template main longitudinal beam are supported on a transverse frame main beam positioned on the wing plate, a plurality of template secondary cross beams are fixedly connected to the first template main longitudinal beam, each template secondary cross beam is respectively connected with a ballast wall template, a vertical wall template and the first curtain board foundation template through telescopic hanging rods, the second template main longitudinal beam is connected with the second curtain board foundation template through a plurality of telescopic hanging rods, a bent part used for hooking the bottom of the wing plate is arranged on the lower edge of the second curtain board foundation template, a hydraulic telescopic device controlled by a control box is fixed on the transverse frame main beam, the telescopic end of the hydraulic telescopic device is connected with the second template main longitudinal beam, and a roller component in rolling fit with the transverse frame main beam is fixedly connected to the second template main longitudinal beam; and an externally hung operating platform for adjusting the second shield plate basic template is fixedly connected to the transverse main beam of the frame outside the second shield plate basic template.

In the present invention, "longitudinal" is a direction that coincides with the bridge length direction, and "lateral" is a direction perpendicular to the bridge length direction. For example, the direction of a transverse main beam of the framework is vertical to the length direction of the bridge, the directions of the first template main longitudinal beam and the second template main longitudinal beam are consistent with the length direction of the bridge, and the direction of the template secondary cross beam is vertical to the length direction of the bridge; the traveling unit is connected with the template unit through the transverse main beam of the framework, when the traveling unit travels, the main longitudinal beam of the first template and the main longitudinal beam of the second template on the transverse main beam of the framework move along with the traveling unit, and the template unit and the external operating platform which are connected with the main longitudinal beam of the first template and the main longitudinal beam of the second template also move along with the traveling unit, so that the integral forward movement of the cast-in-situ three-wall movable formwork is realized. The hydraulic telescopic device is fixed on the truss main cross beam, the front end of the hydraulic telescopic device is fixedly connected with the second template main longitudinal beam, and therefore the second template main longitudinal beam can transversely move through the hydraulic telescopic device to finish the automatic remote or close to the edge of the bridge deck of the second shield foundation template. The whole device only needs to be assembled under a bridge once, and can move freely under the driving of the driving assembly after the bridge deck is hung, so that the problem of construction restriction caused by environmental factors under the bridge is solved, a safe and reliable aerial operation platform is provided, the template system reduces the process of repeated disassembly and assembly, the construction time is saved, the construction progress is accelerated, and the construction cost is reduced.

The installation and construction process of the cast-in-situ three-wall movable formwork of the totally-enclosed sound barrier bridge comprises the following steps: assembling a walking unit → installing a balance weight → assembling a transverse girder of the frame → installing a hydraulic telescopic device, a motor and a control box → laying cables, debugging a system → installing an external suspension work hanging basket → installing an external suspension second curtain board foundation template → installing a walking system upper bridge → installing a three-wall template.

The construction process flow of the shield foundation and the three walls comprises the following steps: the second shield plate foundation template is in place → the vertical wall template, the ballast wall template and the first shield plate foundation template are connected → the side mold and the top pull rod are installed → the correction template → the bottom of the template is anchored → the concrete construction and maintenance → the template is dismantled → the system runs.

The operation principle of the cast-in-situ three-wall movable formwork of the totally-enclosed sound barrier bridge is as follows:

first step, the device is assembled the back, at first hangs the whole device to the bridge floor:

and transferring the second shield plate foundation template to the side far away from the bridge deck, hoisting the whole device to the bridge deck by using a crane after the shield plate steel bars are bound, manually matching and adjusting, aligning the central axis of the walking unit along a pre-marked track line, additionally placing a temporary supporting upright column below the truss beam, and fixing the walking unit by using a wedge. And (5) loosening the hook by the crane, hoisting the prefabricated concrete block to the balance weight platform, and removing the temporary support. During hoisting, manual work is paid attention to match, so that the external hanging basket and the second shield foundation template do not collide with the bridge floor to damage bridge concrete and influence the stability of the structure.

And secondly, assembling the template unit:

and adjusting the second shield plate foundation template back to the template line which is well measured and placed through a hydraulic telescopic device, adjusting the heights of all templates through telescopic hanging rods, connecting the top and the vertical wall template through the telescopic hanging rods, installing side molds, tightening bolts and installing double nuts. And a jacking is manually installed in the external externally-hung operating platform to ensure that the second shield plate foundation template is tightly attached to the edge of the bridge, and the template running is not loosened when the concrete is poured. The heights of all the templates are adjusted by using the telescopic hanging rods according to the designed elevation, the heights of the shielding plates, the vertical wall, the ballast blocking wall and the top surface of the sound barrier foundation are guaranteed to be consistent, smooth transition is realized, the inner side intervals of all the structures meet the design requirements, and the intrusion limit of the ballast blocking wall is strictly forbidden; after all the templates are initially adjusted, the elevation of each template is rechecked by a level gauge, the perpendicularity of each template is corrected by a hammer ball, and the position of each template is checked by a steel tape. All the bottoms of the templates are anchored, and the top of the templates adopts a reinforcing mode of oppositely pulling by a telescopic suspender and supporting the stay wire by the outside, so that the supporting and reinforcing are ensured to be firm. And long steel wire wires are hung on two sides, the top of the template is straightened, the linear straightness is ensured, the geometric dimension meets the design requirement, and the concrete is not deformed in the concrete pouring process. The template seam is stuck by double-sided adhesive tape, and the combination is tight, so that no slurry leakage is ensured.

Thirdly, concrete construction:

the crane and the hopper are positioned and arranged on site in advance, the relevant vibrating equipment and personnel are positioned in place, and preparation work before pouring is carried out. The concrete is vibrated by using an inserted vibrating rod, the moving distance of the inserted vibrating rod is not more than 30cm, the depth of the inserted vibrating rod inserted into the lower layer of concrete is preferably 10cm, the vibrating rod is inserted and lifted slowly during tamping so as to remove air in the concrete and reduce bubbles on the surface of the concrete, the vibrating duration time of each vibrating point is 20-30 s, and the concrete is prevented from sinking and appearing bubbles and is prevented from floating slurry on the surface. When the concrete is poured, the slump of the concrete is not too high. Pouring one part of plain concrete to the position 4-5 cm away from the upper opening of the corner of the structure, and pouring the other part after vibration to ensure no vibration leakage. The time interval of concrete pouring does not exceed the initial setting time of the concrete, otherwise, the concrete is treated according to construction joints, and if the pouring process is interrupted, the vibration of the joint of the upper layer of concrete and the lower layer of concrete is particularly noticed. In the concrete pouring process, a specially-assigned person is arranged to be responsible for observing whether the template is deformed, runs and loosens, and related personnel are immediately organized to handle abnormal conditions. After the concrete is poured to the designed elevation, trowel is used for trowelling the concrete, and after the concrete is initially set, secondary finishing and trowelling are carried out, so that the top surface is ensured to be flat, smooth and consistent.

Fourthly, the template is moved in a walking way:

when the strength of the concrete reaches 2.5Mpa, the form is allowed to be removed, and the pulling hard dragging and the heavy hammer knocking are strictly prohibited during the form removal, so that the structure is prevented from being damaged hard, the angle is prevented from falling, and the form is prevented from deforming. After all the pull rods, the side molds and the jacking supports are removed, the three-wall formwork is lifted through the telescopic hanging rods, the three-wall formwork is separated from concrete and is fastened above the three-wall formwork, and the second shield plate foundation formwork is pushed away from the shield plate through a hydraulic telescopic system. After all the templates are checked to be fastened, a motor is started, a wedge under the roller is removed, the control box is used for controlling the whole walking unit to walk to the next construction section along the measured and placed base line, and the walking unit needs to finish steel bar binding before entering the next working face. And stopping the template system from moving after reaching the position, plugging a wedge under the roller, transferring the three-wall template through the suspender, pulling back the second shield plate foundation template by using a hydraulic device, and completing the template operation of the construction section according to the construction mode.

Preferably, the walking unit further comprises a walking frame, the upper portion of the walking frame is fixedly connected with the transverse main beam of the frame, a plurality of walking wheels are arranged at the bottom of the walking frame, and the driving assembly is used for driving the walking wheels. The walking frame can be arranged into a cuboid frame structure, so that the walking frame can play a supporting role and reduce the overall weight of the walking unit.

Preferably, the telescopic hanger rod is a double-nut pull rod. The height of each template in the template unit from the template secondary beam can be changed through the relative position of the screw cap on the pull rod, so that the structure is simple, and the operation is convenient.

Preferably, the telescopic boom comprises a hydraulic cylinder and a connecting rod, the cylinder body end of the hydraulic cylinder is fixed on the first template main longitudinal beam or the second template main longitudinal beam, the piston end of the hydraulic cylinder is fixed with the connecting rod, and the free end of the connecting rod is connected to the ballast retaining wall template, the vertical wall template, the first shield plate foundation template or the second shield plate foundation template. Through controlling the hydraulic cylinder, the lifting of each template in the template unit can be realized, so that labor is saved, and unified control can be realized.

Preferably, the top trusses which are positioned in the same plane with the transverse main beams of the framework are supported on the transverse main beams of the framework and fixedly connected, and the adjacent top trusses (2) in the same walking unit are connected through a plurality of truss longitudinal beams. By the arrangement, the whole structure is more stable.

Preferably, the external hanging operation platform comprises a bottom plate and guard rails arranged on the side faces of the bottom plate in a surrounding mode. Simple structure, convenient operation is reasonable, and the whole quality is lighter moreover, can also guarantee staff's construction safety.

Preferably, the transverse main beam of the frame, the main longitudinal beam of the first template, the main longitudinal beam of the second template, the secondary transverse beam of the template, the top truss, the longitudinal beam of the truss and the walking frame are all made of channel steel. The material is easy to obtain, and the rigidity and the bearing capacity meet the requirements.

Preferably, adjacent walking units are connected with each other by a plurality of truss stringers. Therefore, the plurality of walking units can be firmly connected, can be constructed together and can move forwards together, and the construction progress is accelerated.

Preferably, the formwork unit further comprises partition plates, and each top truss is fixedly connected with a lifting device for lifting the partition plates. The partition plates are arranged to prevent the ballast blocking walls, the vertical walls and the shielding plates on the construction lines from being connected into a whole, and the firmness of the foundation is guaranteed.

Preferably, the top truss is arranged as a triangular truss, a trapezoidal truss, a diamond truss or an I-shaped truss. The shape of the top truss can be selected according to the actual environment condition.

The beneficial effects of the utility model are: whole device is after ground equipment is accomplished, just can freely remove under drive assembly's drive after hanging the bridge floor, whole construction process is simple, the problem of under-bridge environmental factor restriction construction has been solved, can not damage the concrete of keeping off tiny fragments of stone, coal, etc. wall or bridge face, do not need great operating space, can not influence the normal operating of cities and towns trunk road, reduce the construction degree of difficulty, and safe and reliable aerial operation platform has been provided, the device reduces the process of dismantling the installation repeatedly, the integrated structure, the process of dismantling repeatedly and installing the template has been saved, the construction time has been practiced thrift, accelerate the construction progress, construction cost is reduced.

Drawings

Fig. 1 is a schematic view of the overall structure of the cast-in-place three-wall movable formwork for the totally-enclosed sound barrier bridge.

Fig. 2 is an enlarged schematic view of a partial structure of the cast-in-place three-wall movable formwork of the totally-enclosed sound barrier bridge.

FIG. 3 is an enlarged view of a portion of FIG. 2

In the figure: 1. a frame transverse main beam; 2. a top truss; 3. a truss stringer; 4. balancing weight; 5. a control box; 6. a ballast retaining wall template; 7. erecting a wall formwork; 8. a first shutter base form; 9. a second shutter base form; 10. a first template main longitudinal beam; 11. a second template main longitudinal beam; 12. a template secondary beam; 13. a telescopic boom; 14. a bent portion; 15. a hydraulic telescopic device; 16. a roller assembly; 17. an operation platform is hung externally; 18. a traveling frame; 19. a traveling wheel; 20. a hoisting device.

Detailed Description

The cast-in-place three-wall movable formwork for the totally-enclosed sound barrier bridge is described in detail with reference to fig. 1, 2 and 3.

A totally-enclosed cast-in-place three-wall movable formwork for a sound barrier bridge comprises a plurality of walking units and formwork units, wherein adjacent walking units are arranged in a row along the longitudinal direction of the bridge and are connected with each other through a plurality of truss longitudinal beams 3, the walking units are positioned on the top surface of the bridge at the inner side of a wing plate, each walking unit is provided with at least two transverse frame main beams 1, the outer end parts of the transverse frame main beams 1 cross the wing plate and then extend out of the wing plate, top trusses 2 which are positioned in the same plane with the transverse frame main beams 1 are supported on the transverse frame main beams 1, the ceiling trusses 2 can be set into triangular trusses, trapezoidal trusses, rhombic trusses or I-shaped trusses according to actual environmental conditions, the adjacent top trusses 2 in the same walking unit are connected with each other through the plurality of truss longitudinal beams 3, each formwork unit further comprises a partition plate, and each top truss 2 is fixedly connected with a lifting device 20 for lifting the partition plates, the lifting device 20 can be provided with an electric hoist or a manual hoist, the walking unit is provided with a balance weight 4, the walking unit is provided with a driving assembly and a control box 5 for controlling the driving assembly to operate, the walking unit further comprises a walking frame 18, the upper part of the walking frame 18 is fixedly connected with the transverse main beam 1 of the frame, the bottom of the walking frame 18 is provided with three or four walking wheels 19, and the driving assembly is used for driving the walking wheels 19; the template unit comprises a ballast wall template 6 positioned at the top of a wing plate, a vertical wall template 7, a first shield foundation template 8 and a second shield foundation template 9 positioned at the outer side of the wing plate, a transverse main beam 1 of a frame positioned above the wing plate is supported with a first template main longitudinal beam 10 and a second template main longitudinal beam 11, the first template main longitudinal beam 10 is fixedly connected with a plurality of template secondary cross beams 12, each template secondary cross beam 12 is respectively connected with the ballast wall template 6, the vertical wall template 7 and the first shield foundation template 8 through telescopic suspension rods 13, the second template main longitudinal beam 11 is connected with the second shield foundation template 9 through a plurality of telescopic suspension rods 13, the telescopic suspension rods 13 are double-nut pull rods or the telescopic suspension rods 13 comprise hydraulic cylinders and connecting rods, the cylinder bodies of the hydraulic cylinders are fixed on the first template main longitudinal beam 10 or the second template main longitudinal beam 11, and the piston ends of the hydraulic cylinders are fixed with the connecting rods, the free end of the connecting rod is connected to the ballast wall template 6, the vertical wall template 7, the first shield plate foundation template 8 or the second shield plate foundation template 9; the height of each template in the template unit from the template secondary cross beam 12 can be changed through the relative position of the screw cap on the pull rod, so that the operation is convenient; by controlling the hydraulic cylinder, lifting of each template in the template unit can be realized, so that labor is saved, and unified control can be realized; the lower edge of the second shield plate basic template 9 is provided with a bending part 14 for hooking the bottom of a wing plate, a hydraulic telescopic device 15 controlled by the control box 5 is fixed on the frame transverse main beam 1, the telescopic end of the hydraulic telescopic device 15 is connected with a second template main longitudinal beam 11, and a roller component 16 in rolling fit with the frame transverse main beam 1 is fixedly connected on the second template main longitudinal beam 11; an external operation platform 17 for adjusting the second shield plate basic template 9 is fixedly connected to the transverse main beam 1 of the frame outside the second shield plate basic template 9, and the external operation platform 17 comprises a bottom plate and a protective guard arranged on the side face of the bottom plate in a surrounding manner; the transverse main beam 1 of the framework, the main longitudinal beam 10 of the first template, the main longitudinal beam 11 of the second template, the top truss 2 of the secondary transverse beam 12 of the template, the truss longitudinal beam 3 and the walking framework are all made of channel steel.

In the present invention, "longitudinal" is a direction that coincides with the bridge length direction, and "lateral" is a direction perpendicular to the bridge length direction. For example, the direction of a transverse main beam 1 of the framework is vertical to the length direction of a bridge, the directions of a first template main longitudinal beam 10 and a second template main longitudinal beam 11 are consistent with the length direction of the bridge, and the direction of a template secondary cross beam 12 is vertical to the length direction of the bridge; the traveling unit is connected with the formwork units through the transverse framework main beam 1, when the traveling unit travels, the first formwork main longitudinal beam 10 and the second formwork main longitudinal beam 11 on the transverse framework main beam 1 move along with the traveling unit, and the formwork units connected with the first formwork main longitudinal beam 10 and the second formwork main longitudinal beam 11 and the external hanging operation platform 17 also move along with the traveling unit, so that the integral forward movement of the cast-in-place three-wall movable formwork is realized. The hydraulic telescopic device 15 is fixed on the truss main cross beam, the front end of the hydraulic telescopic device is fixedly connected with the second template main longitudinal beam 11, the second template main longitudinal beam 11 is transversely moved through the hydraulic telescopic device 15 to finish that the second shield foundation template 9 is automatically far away from or close to the edge of the bridge floor, the template unit can be lifted or put down through the telescopic hanger rod 13, after the construction of the last section of operation surface is finished, the template unit can be lifted and moved to the next operation surface along with the device to continue the construction, and the working time of the original template which is installed by manual repeated movement is shortened. The whole device only needs to be assembled under the bridge once, and can move freely under the driving of the driving assembly after being hung on the bridge floor, so that the problem of construction restriction caused by environmental factors under the bridge is solved, a safe and reliable aerial operation platform is provided, the template system reduces the process of repeated disassembly and assembly, the construction time is saved, the construction progress is accelerated, and the construction cost is reduced.

While the preferred embodiments of the present invention have been illustrated and described, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the utility model as defined by the appended claims.

Claims

1. The cast-in-place three-wall movable formwork for the fully-closed sound barrier bridge is characterized by comprising a plurality of walking units and formwork units, wherein the adjacent walking units are longitudinally arranged in a line along the bridge and are mutually connected, the walking units are positioned on the top surface of the bridge at the inner side of a wing plate, the walking units are provided with at least two transverse frame main beams (1), the outer end parts of the transverse frame main beams (1) cross the wing plate and then extend out of the wing plate, the walking units are provided with balance weights (4), and the walking units are provided with driving components and control boxes (5) for controlling the driving components to operate; the template unit comprises a ballast wall template (6) positioned at the top of a wing plate, a vertical wall template (7), a first shield foundation template (8) and a second shield foundation template (9) positioned at the outer side of the wing plate, a frame transverse main beam (1) positioned above the wing plate is supported with a first template main longitudinal beam (10) and a second template main longitudinal beam (11), the first template main longitudinal beam (10) is fixedly connected with a plurality of template secondary beams (12), each template secondary beam (12) is respectively connected with the ballast wall template (6), the vertical wall template (7) and the first shield foundation template (8) through telescopic hanging rods (13), the second template main longitudinal beam (11) is connected with the second foundation template (9) through a plurality of telescopic hanging rods (13), the lower edge of the second shield foundation template (9) is provided with a bending part (14) for hooking the bottom of the wing plate, and a hydraulic telescopic device (15) controlled by a control box (5) is fixed on the frame transverse main beam (1), the telescopic end of the hydraulic telescopic device (15) is connected with a second template main longitudinal beam (11), and a roller component (16) in rolling fit with the frame transverse main beam (1) is fixedly connected to the second template main longitudinal beam (11); an external hanging operation platform (17) used for adjusting the second shielding plate basic template (9) is fixedly connected to the transverse main beam (1) of the frame at the outer side of the second shielding plate basic template (9).

2. The cast-in-place three-wall movable formwork for the totally-enclosed sound barrier bridge according to claim 1, wherein the walking unit further comprises a walking frame (18), the upper part of the walking frame (18) is fixedly connected with the transverse main beam (1) of the frame, a plurality of walking wheels (19) are arranged at the bottom of the walking frame (18), and the driving assembly is used for driving the walking wheels (19).

3. The cast-in-place three-wall movable formwork for the totally-enclosed sound barrier bridge according to claim 2, wherein the telescopic hanger rods (13) are double-nut pull rods.

4. The fully-closed sound barrier bridge cast-in-situ three-wall movable formwork according to claim 2 is characterized in that the telescopic boom (13) comprises a hydraulic cylinder and a connecting rod, the cylinder body end of the hydraulic cylinder is fixed on the first formwork main longitudinal beam (10) or the second formwork main longitudinal beam (11), the piston end of the hydraulic cylinder is fixed with the connecting rod, and the free end of the connecting rod is connected to the ballast retaining wall formwork (6), the vertical wall formwork (7), the first shield plate foundation formwork (8) or the second shield plate foundation formwork (9).

5. The fully-closed sound barrier bridge cast-in-place three-wall movable formwork according to any one of claims 1 to 4, wherein top trusses (2) which are positioned in the same plane with the frame transverse main beams (1) are supported and fixedly connected on the frame transverse main beams (1), and adjacent top trusses (2) in the same walking unit are connected through a plurality of truss longitudinal beams (3).

6. The fully-closed sound barrier bridge cast-in-place three-wall movable formwork according to claim 5 is characterized in that the externally-hung operating platform (17) comprises a bottom plate and guard rails arranged on the side faces of the bottom plate in a surrounding mode.

7. The fully-closed sound barrier bridge cast-in-place three-wall movable formwork according to claim 6 is characterized in that the transverse frame main beam (1), the first template main longitudinal beam (10), the second template main longitudinal beam (11), the template secondary cross beam (12), the top truss (2), the truss longitudinal beam (3) and the walking frame are all made of channel steel.

8. The cast-in-place three-wall movable formwork for the totally-enclosed sound barrier bridge according to claim 7, wherein adjacent walking units are connected with each other through a plurality of truss longitudinal beams (3).

9. The cast-in-place three-wall movable formwork for the totally-enclosed sound barrier bridge according to claim 5, wherein the formwork unit further comprises partition plates, and each top truss (2) is fixedly connected with a lifting device (20) for lifting the partition plates.

10. The cast-in-place three-wall movable formwork for the totally-enclosed sound barrier bridge according to claim 9, wherein the top truss (2) is arranged as a triangular truss, a trapezoidal truss, a diamond truss or an I-shaped truss.