A box girder formwork and girder manufacturing system

Abstract

The present application relates to the field of bridge engineering, and particularly relates to a box girder formwork and a girder manufacturing system. The box girder formwork comprises an outer formwork assembly and an inner formwork assembly; the outer formwork assembly comprises a bottom formwork trolley and two outer side forms; the two outer side forms are respectively located on the two sides of the bottom formwork trolley, and the two outer side forms are used for forming the outer side surfaces of the box girder; the inner formwork assembly comprises a base, two side forms, a first sliding plate and a second sliding plate; the base is provided with travelling wheels, the travelling wheels can be extended downward out of the bottom surface of the base and can be retracted upward; the two side forms are respectively located on the two sides of the base, and the two side forms can be close to and away from each other; the first sliding plate and the second sliding plate are respectively in sliding connection with the two side forms, and the first sliding plate and the second sliding plate can move up and down relative to the corresponding side forms. In the present application, the single-side top plate of the inner formwork assembly of the box girder formwork does not need to be turned downward, so the single-side top plate can be designed as an integral structure, the integrity of the formwork is enhanced, the formwork error phenomenon is reduced, and the forming quality of the box girder is improved.

Description

Technical Field

[0001] This invention relates to the field of bridge engineering, and in particular to a box girder formwork and girder fabrication system. Background Technology

[0002] In the field of bridge engineering, concrete box girders are beam structures with a box-shaped cross-section, primarily made of reinforced concrete. They possess numerous advantages, including high integrity, high torsional stiffness, and rational stress distribution, making them well-suited for various complex bridge types. They are widely used in the construction of highway and railway bridges, effectively bearing loads from vehicles and pedestrians and safely transferring them to the bridge pier foundations. During the casting of concrete box girders in a prefabrication yard, the entire process typically relies on the coordinated use of inner and outer molds.

[0003] Currently, most internal formwork used for concrete box girders is made of steel. After the concrete is poured, to facilitate demolding, the conventional practice is to divide the top plate of the internal formwork into two areas along the central axis, and then demold the top of the internal formwork by rotating and folding these two areas downwards. However, when the inner cavity of the concrete box girder has a variable cross-section along the box girder axis, especially when the top surface of the inner cavity is arranged in a stepped manner, if the existing method of rotating and folding the top plate of the internal formwork downwards is still used, the top formwork on each side needs to be divided into several pieces along the box girder axis, and each piece needs to be rotated and folded independently. However, this excessive number of independent blocks significantly weakens the integrity of the formwork, and deformation easily occurs between adjacent folded plates, which can easily lead to misalignment after the concrete is poured, ultimately affecting the forming quality of the box girder. Summary of the Invention

[0004] The purpose of this invention is to overcome the problem in the prior art where, when the inner mold of a box girder is applied to the inner cavity of the box girder and presents a variable cross-section along the axial direction of the box girder, the top surface of each side needs to be divided into several pieces along the axial direction of the box girder, and each piece needs to be independently rotated and folded. However, this excessive independent segmentation design significantly weakens the integrity of the mold, and deformation easily occurs between adjacent folded plates, which can easily lead to misalignment after concrete pouring, ultimately affecting the forming quality of the box girder. Therefore, this invention provides a box girder mold and a girder fabrication system.

[0005] In a first aspect, the present invention provides a box girder formwork, comprising an outer formwork assembly and an inner formwork assembly;

[0006] The outer mold assembly includes a bottom mold trolley and two outer molds; The top surface of the bottom mold trolley is used to form the bottom surface of the box girder, and the bottom mold trolley can move horizontally; The two outer molds are located on both sides of the bottom mold trolley, and the two outer molds are used to form the outer side of the box girder; The inner mold assembly includes a base, two side molds, a first sliding plate, and a second sliding plate; The base is equipped with wheels that can extend downwards from the bottom surface of the base and retract upwards. The two side molds are located on opposite sides of the base, and the two side molds can move closer to each other or further apart; The first sliding plate and the second sliding plate are slidably connected to the two side molds respectively, and both the first sliding plate and the second sliding plate can move up and down relative to the corresponding side molds; The base, the side mold, the first sliding plate, and the second sliding plate are used to enclose and form the mold for shaping the internal cavity of the box girder.

[0007] The base is used to form the bottom surface of the box girder cavity; the first sliding plate and the second sliding plate are used to form the top surface and the upper area of ​​the two sides of the box girder cavity; the two side molds are used to form the lower area of ​​the two sides of the box girder cavity.

[0008] This invention provides a box girder template. The bottom mold trolley is used to form the bottom surface of the box girder, while supporting the weight of the entire box girder. After demolding, it can move the box girder horizontally. Two outer molds are used to form the outer surfaces of the box girder. The base supports the two side molds, and its bottom surface forms the bottom surface of the box girder's inner cavity. The traveling wheels have a vertical lifting function. During the formwork support stage, the traveling wheels can retract upwards to prevent them from protruding from the bottom surface of the base and affecting the forming of the bottom surface of the box girder's inner cavity. During the demolding stage, the traveling wheels can extend downwards from the bottom surface of the base, supporting the bottom surface of the box girder's inner cavity. The reaction force lifts the base upwards, achieving demolding of the base. Simultaneously, when dragging the inner mold assembly outwards, the traveling wheels reduce the friction between the inner mold assembly and the bottom surface of the box girder's inner cavity, effectively improving demolding efficiency. Both the first and second sliding plates can move downwards relative to their respective side molds, allowing them to be demolded from the inner wall of the box girder cavity and reducing the overall height of the inner mold assembly. The two side molds can move closer together, enabling demolding from the side wall of the box girder cavity and simultaneously narrowing the width of the entire inner mold assembly. Because the inner mold assembly is shorter in height and narrower in width, its overall cross-sectional dimension is smaller than that of the box girder cavity, significantly reducing the obstruction encountered during outward dragging and making the dragging process smoother.

[0009] This invention provides a box girder template. Through the design of the first and second sliding plates, which can move vertically relative to the corresponding side molds, the inner mold assembly, when adapting to the axially varying cross-sectional shape of the box girder cavity, does not require segmenting the axially aligned top plate of the inner mold assembly as in existing technologies where the top plate rotates and folds downwards. In this invention, the top plate of the inner mold assembly does not need to be flipped downwards; therefore, the top plate can be designed as a single integral structure, enhancing the overall integrity of the template, helping to reduce misalignment, and thus improving the forming quality of the box girder.

[0010] The method by which the first sliding plate and the second sliding plate can move up and down relative to the corresponding side mold can be a jack, a telescopic cylinder or a pneumatic telescopic rod.

[0011] Preferably, lifting cylinders are provided between the first sliding plate and the side mold located on the same side of the base, and between the second sliding plate and the side mold located on the same side of the base. The inner sides of the first sliding plate and the second sliding plate are respectively provided with a first sliding sleeve and a second sliding sleeve. The inner side of the side mold is provided with a guide post, which is sleeved in the first sliding sleeve or the second sliding sleeve.

[0012] In this design, the lifting cylinder drives the first or second sliding plate to move up and down. The first and second sliding sleeves cooperate with corresponding guide posts to provide guidance. During the up-and-down movement of the first and second sliding plates, the guide posts guide the first or second sliding plate, ensuring that they always move in a predetermined direction. This reduces the risk of offset or wobbling during movement, further guaranteeing a smooth demolding process.

[0013] Preferably, the inner side of the first sliding plate is provided with a plurality of first sliding sleeves, the axes of the plurality of first sliding sleeves being parallel to each other, and the inner side of the second sliding plate is provided with a plurality of second sliding sleeves, the axes of the plurality of second sliding sleeves being parallel to each other.

[0014] This scheme ensures that several first sliding sleeves can slide synchronously, and that several second sliding sleeves can also slide synchronously.

[0015] Preferably, the bottom end of the first sliding sleeve is provided with a first positioning element, the bottom end of the second sliding sleeve is provided with a second positioning element, and the top end of the guide post is provided with a locking element, the locking element being used to connect with the first positioning element or the second positioning element.

[0016] In this design, the first positioning component, the second positioning component, and the locking component are used to lock the positional relationship between the first sliding plate and the side mold on the same side, and the positional relationship between the second sliding plate and the side mold on the same side, during the formwork support stage. This locking mechanism effectively prevents the first and second sliding plates from sliding downwards relative to the side mold, ensuring the stability of the inner mold assembly during the formwork support stage and subsequent pouring process.

[0017] Preferably, the guide post is provided with a guide hole, the first sliding sleeve is provided with a first guide pin, and the second sliding sleeve is provided with a second guide pin. Both the first guide pin and the second guide pin can pass through the corresponding guide hole. The path of the guide hole includes a parallel section and an inclined section. The parallel section is parallel to the plane where the side mold is located. The bottom end of the inclined section is connected to the top end of the parallel section. The top end of the inclined section is inclined outward.

[0018] In this design, the guide hole provides a guiding function, allowing the first guide pin and the second guide pin to move along a predetermined path. Since the first guide pin and the second guide pin are respectively connected to the first sliding sleeve and the second sliding sleeve, their movement indirectly guides the movement path of the first sliding sleeve and the second sliding sleeve.

[0019] Because the guide hole has a path structure consisting of the parallel segment and the inclined segment, when the first sliding sleeve and the second sliding sleeve move downwards, the first guide pin and the second guide pin move within the guide hole, causing the first sliding sleeve and the second sliding sleeve to first move inwards at an inward angle before moving downwards along the side mold. If the first sliding sleeve and the second sliding sleeve initially move directly downwards along the side mold, the side mold will obstruct the first sliding plate and the second sliding plate, causing the equipment to malfunction.

[0020] Preferably, the outer mold can be positioned close to or far from the bottom mold trolley. This design enables rapid and standardized operations for both the erection and dismantling of the outer mold, effectively shortening the production cycle of a single box girder and improving the overall efficiency of the girder fabrication process.

[0021] The outer mold can be moved closer to or further away from the bottom mold trolley by means of a pneumatic telescopic rod, a screw and nut mechanism, or a hydraulic telescopic cylinder.

[0022] Preferably, a guide rail is provided below the outer mold, and the outer mold is mounted on the guide rail by a guide component. The axial direction of the guide rail is perpendicular to the axial direction of the outer mold. A side-shifting cylinder is connected to the outer side of the outer mold, and the side-shifting cylinder is used to drive the outer mold to move closer to or away from the bottom mold trolley.

[0023] In this design, the guide rail is supported on the ground. The guide rail supports the guiding component and also provides guidance for it. This design ensures that the outer mold, driven by the side-shifting cylinder, can move away from or towards the bottom mold trolley in a predetermined direction, effectively avoiding deviation or swaying during movement and ensuring the accuracy and stability of the entire structure's movement. The side-shifting cylinder, as a power source, provides the necessary external force for the movement of the outer mold, enabling it to smoothly achieve position adjustment.

[0024] Preferably, a truss is provided on the outer side of the outer mold, the truss including a plurality of horizontal bars distributed along the axial direction of the outer mold, one end of each horizontal bar being connected to the outer mold, and a vertical bar being provided at the end of the horizontal bar away from the outer mold, the vertical bar being connected to the outer mold, and the guide component being disposed below the horizontal bars.

[0025] In this design, the horizontal bar provides installation space for the guide component and also supports the vertical bar. Since the horizontal bar is connected to the outer mold, the entire truss structure forms an organic whole with the outer mold, effectively enhancing the overall rigidity of the outer mold.

[0026] Preferably, the top of the vertical rod is higher than the top edge of the outer mold, and a tie rod is provided between the tops of the vertical rods on both sides.

[0027] In this design, the top of the vertical rod is positioned higher than the top edge of the outer formwork. This provides the necessary conditions for the connection between the top of the vertical rod and the tie rod, ensuring an effective connection. The tie rod, by connecting the vertical rods on both sides, forms a stable connection system, thereby constraining the outer formwork on both sides and resisting the outward pressure exerted on the outer formwork during the casting of the box girder.

[0028] Preferably, the top edge of the outer mold is provided with a comb plate, which is used to form the side elevation of the flange plate of the box girder, and a horizontal hydraulic cylinder is provided between the vertical rod and the comb plate located on the same side.

[0029] In this design, the comb-tooth plate is used to form the side elevation of the flange plate of the box girder. The upper half of the comb-tooth plate has grooves arranged in a comb-like pattern, which can be used to assist in positioning the reinforcing bars. The horizontal hydraulic cylinder is used to support the comb-tooth plate. During the formwork erection stage, extending the horizontal hydraulic cylinder can quickly provide support to the comb-tooth plate, ensuring the stability of its installation. During the formwork removal stage, shortening the horizontal hydraulic cylinder can quickly release the support to the comb-tooth plate, allowing for rapid removal. This design further improves the efficiency of formwork erection and removal.

[0030] The two side molds can be driven to move closer and further apart using a jack, a telescopic cylinder, or a rack and pinion mechanism. The jack or cylinder can be connected between the two side molds, or between the base and the side molds. When using a rack and pinion mechanism, a rack is mounted on the side mold, and a gear meshing with the rack is provided on the base. Rotating the drive gear causes the rack to move linearly, thereby moving the side molds.

[0031] Preferably, a transverse hydraulic cylinder is provided between the base and the side mold, a transverse guide rod is provided on the inner side of the side mold, a guide sleeve is provided on the base, and the transverse guide rod is sleeved in the guide sleeve.

[0032] In this design, the transverse hydraulic cylinder can drive the side molds to move away from and towards the base, thereby enabling the side molds located on both sides of the base to move closer and further apart. However, placing the transverse hydraulic cylinder between the two side molds may result in one side mold moving under the action of the cylinder while the other remains stationary. This can cause one side mold to fail to detach smoothly from the mold during demolding, affecting the demolding effect and production efficiency. This design, however, ensures that both side molds move towards the center simultaneously under the drive of the transverse hydraulic cylinder, thus ensuring that both side molds can complete the demolding operation simultaneously, greatly improving demolding efficiency and stability.

[0033] Furthermore, the transverse guide rod and the guide sleeve can cooperate to achieve a guiding function. During the movement of the side mold, the guide sleeve provides a precise guide track for the transverse guide rod, ensuring that the side mold always moves in the predetermined direction, reducing problems such as offset and shaking of the side mold during movement, and further ensuring the smooth progress of the demolding process.

[0034] Preferably, the base includes a bottom plate, a web plate, and a top plate, the web plate being located between the bottom plate and the top plate, the bottom plate having a first notch for the traveling wheel to pass through, and a removable sealing element being provided at the first notch.

[0035] In this design, the base plate supports the web plate, and the web plate supports the top plate. During the demolding stage, the traveling wheels can extend through the first notch to the bottom surface of the base plate, facilitating the lifting of the base and moving the inner mold assembly. The sealing component is used to seal the first notch during the formwork erection and pouring stages to prevent concrete from overflowing from the first notch.

[0036] The walking wheels can move up and down either by directly driving them through a vertically arranged telescopic component, or indirectly through a lever mechanism, where a horizontally installed telescopic component drives a lever to move, thereby raising or lowering the walking wheels. The telescopic component can be a jack, an electric push rod, or a telescopic cylinder.

[0037] Preferably, the traveling wheel includes a roller and a rotating shaft. The axis of the rotating shaft is perpendicular to the web and rotatably connected to the web. The roller is connected to the rotating shaft via a first support arm. A second support arm is connected to the rotating shaft. By driving the second support arm to rotate around the axis of the rotating shaft, the roller can be driven to rotate around the axis of the rotating shaft, thereby enabling the roller to move up and down and pass through the first gap.

[0038] In this design, the roller rolls on the bottom surface of the box girder's inner cavity, simultaneously providing support. The web supports the rotating shaft, ensuring its stable rotation. The first arm, the rotating shaft, and the second arm form a lever mechanism. According to the lever principle, when the distance between the point of force application on the second arm and the axis of the rotating shaft is greater than the distance between the roller and the axis of the rotating shaft, this lever mechanism amplifies the driving force. This means that under the same driving input, the lever mechanism can allow the roller to obtain a greater force.

[0039] Furthermore, this lever mechanism allows the telescopic components driving the second arm to be arranged horizontally. This arrangement significantly reduces the space occupied by the telescopic components in the vertical direction, thereby freeing up more usable space in the vertical direction inside the inner mold assembly. This facilitates the rational layout of other components inside the inner mold assembly and the optimized design of the overall structure.

[0040] Preferably, the first sliding plate includes a first side wall plate and a first top panel, and the second sliding plate includes a second side wall plate and a second top panel. The first top panel is fixedly connected to the top edge of the first side wall plate, and the second top panel is rotatably connected to the top edge of the second side wall plate. The second top panel can be opened and closed.

[0041] In this design, the second top panel is rotatably connected to the top edge of the second side wall panel, allowing the second top panel to be opened and closed. When the second top panel is open, operators can directly perform various operations on the interior of the inner mold assembly from the second top panel. Without this design, after the inner mold assembly is installed, operators can only enter the interior through openings at both ends of the inner mold assembly to work. However, when the inner mold assembly is small, its internal space is extremely limited, and operators will face the problem of cramped operating space after entering through the openings, making operation extremely inconvenient. The ability of the second top panel to open and close effectively solves this problem, providing operators with more convenient operating conditions.

[0042] The second top panel can be a single piece of panel or it can be composed of multiple independent panels. If it is composed of multiple independent panels, each panel can be opened or closed independently.

[0043] Preferably, when the cross-sectional dimensions of the inner mold assembly change along the axial direction, the second top panel is divided into several segments along the axial direction of the inner mold assembly, and each segment is rotatably connected to the top edge of the second side wall panel. When there is a height difference between two adjacent segments, a movable cover plate is provided between the two adjacent segments.

[0044] In this design, because the cross-sectional dimensions of the inner mold assembly change along the axial direction, the rotation axes of each segment are not on the same straight line, so they need to be rotated separately. When there is a height difference between two adjacent segments, a movable cover plate that can be detached separately is provided to avoid obstructing the rotation and opening of the segments.

[0045] In a second aspect, the present invention provides a beam fabrication system, comprising a transverse moving zone, a formwork casting zone, and a prestressing tensioning zone arranged sequentially. A longitudinal track is provided between the transverse moving zone and the prestressing tensioning zone. The transverse moving zone is provided with a first transverse moving track, and the prestressing tensioning zone is provided with a second transverse moving track. The formwork casting zone is provided with a box girder formwork as described in the first aspect. The bottom formwork trolley of the box girder formwork is axially movable along the longitudinal track, and the bottom formwork trolley is laterally movable between different longitudinal tracks via the first transverse moving track or the second transverse moving track.

[0046] This invention provides a beam fabrication system. The transverse movement zone serves as the starting point of the entire beam fabrication production line, facilitating the cleaning of the bottom formwork trolley. The formwork support and pouring zone is used for formwork support, placement of the steel reinforcement cage for the box girder, and concrete pouring. The prestressing tensioning zone is used for threading steel strands through the box girder and performing prestressing tensioning operations. The longitudinal track provides a path and guides the movement of the bottom formwork trolley, enabling it to move between the transverse movement zone, the formwork support and pouring zone, and the prestressing tensioning zone. The bottom formwork trolley supports the already poured box girder and can move the box girder from the formwork support and pouring zone to the prestressing tensioning zone. The box girder cannot be lifted before reaching its lifting strength. The bottom formwork trolley's ability to move the box girder from the formwork support and pouring zone to the prestressing tensioning zone cleverly solves the problem of the box girder being unable to be moved before reaching its lifting strength. This hoist-free transfer method not only avoids potential damage to the box girder during hoisting but also saves on hoisting equipment and labor costs. Furthermore, after the bottom formwork trolley transfers the box girder, it quickly frees up the formwork casting area, providing ample space for subsequent box girder production and significantly improving girder production efficiency. The first and second transverse tracks provide dedicated track support for the lateral movement of the bottom formwork trolley, ensuring its ability to move between different longitudinal tracks. Through proper design, at least two of the longitudinal tracks, along with the first and second transverse tracks, can form a circular track system. After the box girder is hoisted and transferred away from the bottom formwork trolley in the prestressing tensioning zone, the bottom formwork trolley can return to the transverse zone along this circular track system, ready for the next girder production task, achieving continuity and efficiency in the production process.

[0047] This invention provides a beam manufacturing system. By setting up the longitudinal track, the first transverse track, and the second transverse track, the bottom mold trolley can move axially along the longitudinal track. The setting of the inner mold assembly of the box girder template further optimizes the beam manufacturing process and improves the production efficiency of the entire beam manufacturing production line.

[0048] Preferably, a steam curing zone is provided between the formwork casting area and the prestressed tensioning zone, and the steam curing zone is provided with a steam curing chamber, with the longitudinal track passing through the steam curing chamber.

[0049] In this scheme, the steam curing chamber is used for steam curing of the cast box girders. Steam curing shortens the time it takes for the box girders to reach their design strength, improves production efficiency, and enhances the forming quality of the box girders. A longitudinal track runs through the steam curing chamber, allowing the bottom mold trolley to carry the cast box girders directly into the chamber along the longitudinal track, conveniently completing the steam curing operation on the production line and improving both production efficiency and quality.

[0050] Preferably, a standard curing zone is provided between the steam curing zone and the prestressed tensioning zone, and sprayers are provided on the ground on both sides of the longitudinal track in the standard curing zone.

[0051] In this scheme, the standard curing area provides necessary spray water replenishment to the box girder through the sprayer, so that the box girder can continue to receive good standard curing after steam curing, ensuring the curing quality of the box girder.

[0052] Preferably, a beam storage area is provided on the side of the prestressed tensioning zone away from the standard curing zone, the beam storage area is equipped with a spray gate, and drainage ditches are provided on the ground of the steam curing zone, the standard curing zone and the beam storage area, and the drainage ditches are connected to the recycling pool.

[0053] In this scheme, the girder storage area is used to store box girders that have already been fabricated, and the spray gantry is used to continue providing water replenishment for the box girders stored in the storage area. The drainage ditch can collect the curing water that falls to the ground during curing operations in the steam curing area, the standard curing area, and the girder storage area. This collected curing water is centrally discharged into the recycling pool through the drainage ditch. After filtration treatment, the water in the recycling pool can be reused for the curing of the box girders, thus effectively realizing the recycling of water resources and achieving the effect of saving water costs.

[0054] Preferably, a rebar binding area is provided on the side of the lateral movement area away from the formwork casting area. The rebar binding area, the lateral movement area, and the formwork casting area are located in the factory building. A crane is provided on the top of the factory building, which can move between the rebar binding area, the lateral movement area, and the formwork casting area. A concrete placing boom is also provided on the top of the factory building, which can move within the formwork casting area.

[0055] In this design, the rebar tying area is used for processing and tying the various rebar skeletons in the box girder. The rebar tying area, the lateral movement area, and the formwork and pouring area are located within the workshop, effectively avoiding the adverse effects of severe weather such as wind and rain on the box girder formwork and pouring operations. Simultaneously, the enclosed space of the workshop provides convenient conditions for the placement of the overhead crane, which can be used for auxiliary hoisting operations of the rebar and formwork, improving construction efficiency and convenience.

[0056] The concrete placing boom is used for pouring concrete for the box girder. Its movement and motion are similar to those of the overhead crane. The placing boom includes a crossbeam and a pouring trolley. The crossbeam is mounted on track beams on both sides of the plant and can move along these beams. The pouring trolley can move axially along the crossbeam, allowing it to cover the entire formwork pouring area, greatly facilitating the concrete pouring operation for the box girder.

[0057] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This invention provides a box girder template. Through the design of the first sliding plate and the second sliding plate being able to move vertically relative to the corresponding side mold, the inner mold assembly, when adapting to the axially varying cross-sectional shape of the box girder cavity, does not require, as in the prior art, segmenting the axially arranged top plate of the inner mold assembly due to its downward-rotating and folding mechanism. In this invention, the top plate of the inner mold assembly does not need to be flipped downwards; therefore, the top plate can be designed as a single integral structure, enhancing the overall integrity of the template, helping to reduce misalignment, and thus improving the forming quality of the box girder. 2. The present invention provides a beam manufacturing system. Through the arrangement of the longitudinal track, the first transverse track and the second transverse track, the bottom mold trolley can move axially along the longitudinal track. In addition, the arrangement of the inner mold assembly of the box girder template further optimizes the beam manufacturing process and improves the production efficiency of the entire beam manufacturing production line. Attached Figure Description

[0058] Figure 1 This is a schematic diagram of the first cross-section of a box girder formwork during the formwork support stage.

[0059] Figure 2 This is a schematic diagram of the second cross section of a box girder formwork during the formwork support stage.

[0060] Figure 3 This is a schematic cross-sectional view of the demolding stage of a box girder formwork.

[0061] Figure 4 This is a schematic diagram of the internal mold assembly.

[0062] Figure 5This is the right view of the inner mold component.

[0063] Figure 6 This is a schematic diagram of the first cross-section of the standard section of the inner mold assembly.

[0064] Figure 7 This is a schematic diagram of the second cross-section of the standard section of the inner mold assembly.

[0065] Figure 8 This is a schematic diagram of the base structure.

[0066] Figure 9 This is an enlarged schematic diagram showing the location of the guide sleeve on the base.

[0067] Figure 10 This is a schematic diagram of the side mold structure.

[0068] Figure 11 This is a schematic diagram of the structure of the first sliding plate.

[0069] Figure 12 This is a schematic diagram of the second sliding plate.

[0070] Figure 13 This is a schematic diagram showing the connection relationship between the side mold and the first side wall plate of the first sliding plate or the second side wall plate of the second sliding plate.

[0071] Figure 14 This is a schematic diagram of the arrangement of the lifting cylinders.

[0072] Figure 15 This is a schematic diagram of the arrangement of the transverse hydraulic cylinders.

[0073] Figure 16 This is a schematic diagram of the sealing component.

[0074] Figure 17 This is a schematic diagram of the walking wheel.

[0075] Figure 18 This is a side elevation diagram of the traveling wheels during the formwork support stage.

[0076] Figure 19 This is a side elevation diagram of the traveling wheels during the demolding stage.

[0077] Figure 20 This is a front elevation view of the traveling wheels during the formwork support stage.

[0078] Figure 21 This is a front elevation view of the traveling wheels during the demolding stage.

[0079] Figure 22 This is a schematic diagram of the traveling wheels during the formwork support stage.

[0080] Figure 23 This is a schematic diagram of the traveling wheels during the demolding stage.

[0081] Figure 24 This is a first schematic diagram showing the first rotating plate, the second rotating plate, and the third rotating plate in the open state.

[0082] Figure 25 This is a second schematic diagram showing the first, second, and third rotating plates in the open state.

[0083] Figure 26 This is a schematic diagram showing the first, second, and third rotating plates in the closed state.

[0084] Figure 27 This is a schematic diagram showing the demolding sequence of the end section.

[0085] Figure 28 This is a schematic diagram of the demolding sequence for the descending section.

[0086] Figure 29 This is a schematic diagram of the demolding sequence for the standard section.

[0087] Figure 30 This is a first planar schematic diagram of a beam fabrication system.

[0088] Figure 31 This is a schematic diagram of the second plane of a beam fabrication system.

[0089] Figure 32 This is a schematic diagram of the cross-section of the formwork casting area.

[0090] Figure 33 This is a schematic diagram of the cross-section of the steam curing zone.

[0091] Marked in the image: 1-Base, 11-Base plate, 111-First notch, 12-Web plate, 121-First clamping plate, 122-Through hole, 123-Guide sleeve, 124-End plate, 125-Locking plate, 13-Top plate, 14-Traveling wheel, 141-Roller, 142-First support arm, 143-Rotating shaft, 144-Second support arm, 15-Sealing component, 151-Sealing plate, 152-Fixing component, 16-Traction connector, 17-Transfer trolley 2-Side mold, 21-Side plate, 211-Guide post, 2111-Guide hole, 2112-Locking element, 212-Transverse guide rod, 213-Third locking plate, 214-Second locking plate, 22-Rolled edge plate, 221-Third longitudinal beam, 222-Second notch, 223-Support. 3-First sliding plate, 31-First side wall panel, 311-First longitudinal beam, 312-First sliding sleeve, 3121-First positioning component, 3122-First guide pin, 313-Fourth retaining plate, 32-First top panel. 4-Second sliding plate, 41-Second side wall panel, 411-Second longitudinal beam, 412-Second sliding sleeve, 4121-Second positioning element, 4122-Second guide pin, 413-Fifth retaining plate, 42-Second top panel, 421-First rotating plate, 422-Second rotating plate, 423-Third rotating plate, 424-Modible cover plate, 43-Connecting plate 5-Vertical support, 6-Horizontal support, 7-Anti-buoyancy crossbeam, 8-Lifting cylinder, 9-Transverse hydraulic cylinder, 10-Demolding cylinder, 201 - Outer mold, 2011 - Comb plate, 202-Horizontal bar, 2021-Support bar 203 - Vertical rod, 2031 - Horizontal cylinder 204 - Operating platform, 2041 - Guardrail 205 - Tie rod, 206-Guide rail, 207-Guide components, 208-Side displacement cylinder, 209-Concrete base, 401-Bottom Mold Trolley 301-Rebar Binding Area, 3011-Overhead Crane 302 - Lateral movement zone, 3021 - First lateral movement track, 303 - Formwork casting area, 3031 - Concrete placing boom, 3032 - Transverse passageway 304 - Steam curing area, 3041 - Steam curing room, 3042 - Steam spray pipe, 3043 - Boiler room. 305 - Standard Breeding Area 306 - Prestressed tensioning zone, 3061 - Second transverse track, 307 - Grouting Zone 308 - Pulping area, 3081 - Centralized pulping station, 3082 - Three-stage sedimentation tank, 3083 - Water storage tank. 309 - Beam Storage Area, 3091 - Sprinkler Gantry, 3010 - Longitudinal track. Detailed Implementation

[0092] The present invention will now be described in further detail with reference to specific embodiments. However, this should not be construed as limiting the scope of the present invention to the following embodiments; all technologies implemented based on the content of the present invention fall within the scope of the present invention.

[0093] Unless otherwise specified, the terms "upper," "lower," "left," "right," "center," "inner," and "outer," etc., used in the description of specific embodiments of the present invention to indicate orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationship in which the product / equipment / device is usually placed during use. These terms are merely for the purpose of facilitating the description of the present invention or simplifying the description in specific embodiments, and for enabling those skilled in the art to quickly understand the solution, and do not indicate or imply that a particular device / component / element must have a specific orientation, or be constructed and operated in a specific positional relationship. Therefore, they should not be construed as limitations on the present invention.

[0094] Furthermore, the use of terms such as "horizontal," "vertical," "suspended," "parallel," and "coaxial" does not imply that the corresponding device / component / element must be absolutely horizontal, vertical, suspended, parallel, or coaxial. Slight tilt or deviation is permissible, as long as it does not affect the normal function of the relevant component. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," not that the structure must be perfectly horizontal; a slight tilt is acceptable. "Coaxial" means that two components are arranged as coaxially as possible, allowing them to move coaxially or approximately coaxially when their relative positions change. Alternatively, it can be simplified to mean that the corresponding device / component / element, when arranged in "horizontal," "vertical," "suspended," "parallel," or "coaxial" directions, can have an error / deviation of ±10% relative to the corresponding direction, more preferably within ±8%, more preferably within ±6%, more preferably within ±5%, and more preferably within ±4%. For example, the deviation in the "coaxial" direction is controlled within 0.2-1mm, preferably within 0.2-0.5mm. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its function in the solution of the present invention.

[0095] Furthermore, the use of terms such as "first," "second," and "third" in terminology is merely for distinguishing descriptions of identical or similar components and should not be interpreted as emphasizing or implying the relative importance of a particular component.

[0096] Furthermore, in the description of the embodiments of the present invention, "several", "more than", and "a number of" represent at least two. The number can be any number, such as two, three, four, five, six, seven, eight, or nine, and can even exceed nine.

[0097] Furthermore, in the description of the technical solution of this invention, unless otherwise explicitly specified / limited / restricted, the terms "set up," "install," "connect," "link," "provided with," "laid out," and "arranged" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to connection methods commonly used in the art, such as welding, riveting, bolting, and threaded connections. Such connections can be mechanical, electrical, or communication connections; they can be direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components.

[0098] Example 1 like Figures 1 to 3 As shown, a box girder formwork includes an outer formwork assembly and an inner formwork assembly.

[0099] The outer mold assembly includes a bottom mold trolley 401 and two outer molds 201.

[0100] The top surface of the bottom mold trolley 401 is used to form the bottom surface of the box girder, and the bottom mold trolley 401 can move horizontally.

[0101] Two outer molds 201 are located on both sides of the bottom mold trolley 401, and the two outer molds 201 are used to form the outer side of the box girder.

[0102] Specifically, the shape of the outer mold 201 is adapted to the shape of the outer side of the box girder. Both ends of the outer mold assembly are provided with end templates, which are used to form the end faces of the box girder and to connect the outer mold assembly and the inner mold assembly.

[0103] like Figure 4 and Figure 5 As shown, the inner mold assembly includes a base 1, two side molds 2, a first sliding plate 3, and a second sliding plate 4.

[0104] The base 1 is equipped with a traveling wheel 14, which can extend downwards from the bottom surface of the base 1 and retract upwards.

[0105] The two side molds 2 are located on both sides of the base 1, and the two side molds 2 can move closer to each other or further away.

[0106] The first sliding plate 3 and the second sliding plate 4 are slidably connected to the two side molds 2 respectively, and both the first sliding plate 3 and the second sliding plate 4 can move up and down relative to the corresponding side mold 2.

[0107] The base 1, side mold 2, first sliding plate 3, and second sliding plate 4 are used to enclose and form the mold for shaping the internal cavity of the box girder.

[0108] The base 1 is used to form the bottom surface of the inner cavity of the box girder; the first sliding plate 3 and the second sliding plate 4 are used to form the top surface and the upper area of ​​the two sides of the inner cavity of the box girder; the two side molds 2 are used to form the lower area of ​​the two sides of the inner cavity of the box girder.

[0109] Specifically, the side mold 2 includes a side plate 21 and a rolled edge plate 22, with the rolled edge plate 22 connected to the bottom edge of the side plate 21 and facing the base 1. A third longitudinal beam 221 is provided on the rolled edge plate 22, arranged longitudinally along the inner mold assembly, i.e., along its axial direction. The third longitudinal beam 221 can be made of channel steel or square steel tubing, with the square steel tubing having a cross-sectional dimension of 50mm×50mm or 60mm×60mm and a wall thickness of 4mm, 5mm, or 6mm. The third longitudinal beam 221 enhances the rigidity of the rolled edge plate 22. Stiffening ribs may be provided on the inner side of the side plate 21 to enhance its planar rigidity.

[0110] One end of the base 1 is provided with a detachable traction connector 16, which is used to connect with external traction equipment so as to pull the entire inner mold assembly out of the box girder cavity after demolding.

[0111] Both the outer mold assembly and the inner mold assembly are made of steel structure.

[0112] The box girder template, with its vertically extendable and retractable wheels 14, and its ability to move closer to and further away from each other, and its ability to move up and down relative to the corresponding side molds 2, allows for quick and efficient demolding of the box girder cavity. This also enables the entire inner mold assembly to be smoothly removed from the box girder cavity, significantly reducing the difficulty of demolding the inner mold and greatly improving demolding efficiency.

[0113] In optional implementations, such as Figure 14 As shown, lifting cylinders 8 can be provided between the first sliding plate 3 and the side mold 2 located on the same side of the base 1, and between the second sliding plate 4 and the side mold 2 located on the same side of the base 1. Figure 11 and Figure 12 As shown, the inner sides of the first sliding plate 3 and the second sliding plate 4 can be respectively provided with a first sliding sleeve 312 and a second sliding sleeve 412, such as... Figure 10 and Figure 13 As shown, the inner side of the side mold 2 may be provided with a guide post 211, which is sleeved in the first sliding sleeve 312 or the second sliding sleeve 412.

[0114] Specifically, both the first sliding sleeve 312 and the second sliding sleeve 412 can be made of two channel steels arranged back to back. The guide post 211 can be made of square steel tubing. The cross-sectional dimensions of the square steel tubing are adapted to the gap between the two channel steels, and the square steel tubing can be inserted into the gap between the channel steels.

[0115] The inner side of the first sliding plate 3 is provided with a fourth clamping plate 313, the inner side of the second sliding plate 4 is provided with a fifth clamping plate 413, and the inner side of the side mold 2 is provided with a third clamping plate 213. The top end of the lifting cylinder 8 located on one side of the first sliding plate 3 is hinged to the fourth clamping plate 313 by a pin, and the top end of the lifting cylinder 8 located on one side of the second sliding plate 4 is hinged to the fifth clamping plate 413 by a pin. The bottom end of the lifting cylinder 8 is hinged to the third clamping plate 213 on the corresponding side by a pin.

[0116] In an optional embodiment, the inner side of the first sliding plate 3 may be provided with a plurality of first sliding sleeves 312, the axes of the plurality of first sliding sleeves 312 being parallel to each other, and the inner side of the second sliding plate 4 may be provided with a plurality of second sliding sleeves 412, the axes of the plurality of second sliding sleeves 412 being parallel to each other.

[0117] In optional implementations, such as Figure 11 and Figure 12 As shown, the bottom end of the first sliding sleeve 312 may be provided with a first positioning member 3121, and the bottom end of the second sliding sleeve 412 may be provided with a second positioning member 4121, such as... Figure 13 As shown, the top of the guide post 211 may be provided with a locking member 2112, which is used to connect with the first positioning member 3121 or the second positioning member 4121.

[0118] Specifically, during the formwork support stage, both the first sliding sleeve 312 and the second sliding sleeve 412 can slide to their highest positions relative to the corresponding guide posts 211. At this time, the first positioning element 3121 on the first sliding sleeve 312 and the second positioning element 4121 on the second sliding sleeve 412 can respectively contact and abut against the locking element 2112 on the corresponding guide posts 211. The first positioning element 3121 and the second positioning element 4121 are respectively connected to the corresponding locking element 2112 by bolts, preventing the first sliding plate 3 and the second sliding plate 4 from sliding downward relative to the side mold 2, thus ensuring the stability during the formwork support stage.

[0119] In an optional embodiment, the guide post 211 may be provided with a guide hole 2111, the first sliding sleeve 312 may be provided with a first guide pin 3122, and the second sliding sleeve 412 may be provided with a second guide pin 4122. Both the first guide pin 3122 and the second guide pin 4122 can pass through the corresponding guide hole 2111. The path of the guide hole 2111 includes a parallel section and an inclined section. The parallel section is parallel to the plane where the side mold 2 is located. The bottom end of the inclined section is connected to the top end of the parallel section. The top end of the inclined section is inclined outward.

[0120] In an alternative embodiment, the outer mold 201 can be brought closer to or further away from the bottom mold trolley 401.

[0121] In an optional embodiment, a guide rail 206 may be provided below the outer mold 201. The outer mold 201 is mounted on the guide rail 206 via a guide component 207. The axial direction of the guide rail 206 is perpendicular to the axial direction of the outer mold 201. A side-shifting cylinder 208 is connected to the outer side of the outer mold 201. The side-shifting cylinder 208 is used to drive the outer mold 201 to move closer to or away from the bottom mold trolley 401.

[0122] Specifically, the guide rail 206 is installed on the ground via the concrete base 209. The axial direction of the guide rail 206 is arranged at an angle to the horizontal plane. The end of the guide rail 206 closer to the outer mold 201 is higher than the end farther from the outer mold 201. The two ends of the lateral displacement cylinder 208 are hinged to the outer mold 201 and the concrete base 209, respectively.

[0123] In an optional embodiment, a truss may be provided on the outer side of the outer mold 201. The truss may include a plurality of horizontal bars 202, which are distributed along the axial direction of the outer mold 201. One end of each horizontal bar 202 is connected to the outer mold 201. A vertical bar 203 is provided at the end of the horizontal bar 202 away from the outer mold 201. The vertical bar 203 is connected to the outer mold 201. The guide component 207 may be provided below the horizontal bar 202.

[0124] Specifically, a horizontal connecting rod can be provided between two adjacent horizontal bars 202, and the axis of the horizontal connecting rod is parallel to the axis of the outer mold 201. The horizontal connecting rod is used to strengthen the overall integrity of the truss. The guide component 207 is connected to the bottom of the horizontal bar 202 through two columns. Only some of the horizontal bars 202 need to be connected to the guide component 207, and the bottom of the remaining horizontal bars 202 not connected to the guide component 207 can be provided with a detachable support rod 2021. The top end of the support rod 2021 is hinged to the bottom surface of the horizontal bar 202, and the bottom end of the support rod 2021 is supported on the ground.

[0125] An operating platform 204 may also be provided on the outer side of the outer formwork 201, and a guardrail 2041 may be provided on the edge of the operating platform 204. The operating platform 204 can provide a platform for workers to carry out construction work, which facilitates the reinforcement binding and concrete pouring of the box girder.

[0126] In an optional embodiment, the top of the vertical rod 203 may be higher than the top edge of the outer mold 201, and a tie rod 205 is provided between the tops of the vertical rods 203 on both sides.

[0127] Specifically, the vertical rod 203 passes through the operating platform 204. The tie rod 205 is a threaded rod, and both ends of the tie rod 205 are connected to the vertical rod 203 by nuts.

[0128] In an optional embodiment, the top edge of the outer mold 201 may be provided with a comb plate 2011, which is used to form the side profile of the flange plate of the box girder. A horizontal hydraulic cylinder 2031 may be provided between the vertical rod 203 and the comb plate 2011 located on the same side.

[0129] Specifically, the top edge of the comb plate 2011 and the outer mold 201 are detachably connected. The horizontal cylinder 2031 is fixedly connected to the vertical rod 203, and the telescopic head of the horizontal cylinder 2031 can move closer to and further away from the comb plate 2011.

[0130] In an optional embodiment, a transverse hydraulic cylinder 9 may be provided between the base 1 and the side mold 2, a transverse guide rod 212 may be provided on the inner side of the side mold 2, and a guide sleeve 123 may be provided on the base 1, with the transverse guide rod 212 sleeved in the guide sleeve 123.

[0131] Specifically, such as Figure 15 As shown, the transverse hydraulic cylinder 9 is arranged horizontally through the base 1, with both ends of the transverse hydraulic cylinder 9 extending to the left and right sides of the base 1, respectively. Figure 8 , Figure 9 and Figure 13 As shown, a first retaining plate 121 is installed on both sides of the base 1; correspondingly, as Figure 10 and Figure 13 As shown, a second clamping plate 214 is provided at a corresponding position on the inner side of the side mold 2. One end of the transverse hydraulic cylinder 9 is hinged to the first clamping plate 121 on one side of the base 1 by means of a pin, and the other end is hinged to the second clamping plate 214 on the inner side of the side mold 2 by means of a pin.

[0132] The axial direction of the guide sleeve 123 is perpendicular to the axis of the base 1, and both the guide sleeve 123 and the transverse guide rod 212 have a certain angle with the horizontal plane, so that the side mold 2 can move obliquely upward when it moves laterally toward the base 1. An end plate 124 is provided at the end of the guide sleeve 123 away from the transverse guide rod 212, and this end plate 124 is connected to the outer wall of the end of the guide sleeve 123. A screw hole is provided on the end face of the transverse guide rod 212 near the guide sleeve 123.

[0133] When the side mold 2 moves laterally toward the base 1, the lateral guide rod 212 can be inserted into the guide sleeve 123, and the end of the lateral guide rod 212 with the screw hole will be aligned with the end of the guide sleeve 123 where the end plate 124 is mounted. At this time, using the locking plate 125 with the screw hole and bolts, the end plate 124 and the end of the lateral guide rod 212 with the screw hole are fixedly connected together. This design can effectively prevent the side mold 2 and the base 1 from separating during the dragging of the entire inner mold assembly.

[0134] In optional implementations, such as Figure 6 , Figure 8 , Figure 9 and Figure 13 As shown, the base 1 may include a bottom plate 11, a web plate 12 and a top plate 13. The web plate 12 is located between the bottom plate 11 and the top plate 13. The bottom plate 11 is provided with a first notch 111 for the walking wheel 14 to pass through. A detachable sealing member 15 is provided at the first notch 111.

[0135] Specifically, the base plate 11 has an isosceles trapezoidal cross-section, and the two hypotenuses of the isosceles trapezoid support the rolled edge plate 22 of the side mold 2. Two web plates 12 are connected to the top edge of the isosceles trapezoid, with a certain gap between them. A guide sleeve 123 passes through both web plates 12. A through hole 122 is provided on the web plate 12 for the transverse hydraulic cylinder 9 to pass through.

[0136] like Figure 7 and Figure 10 As shown, the base 1 can also be equipped with an anti-buoyancy beam 7. The anti-buoyancy beam 7 is horizontally arranged and passes through both web plates 12. The axis of the anti-buoyancy beam 7 is perpendicular to the axis of the base 1, and both ends of the anti-buoyancy beam 7 extend outward from the web plates 12 on both sides. On the rolled edge plate 22, supports 223 are respectively provided at positions corresponding to the two ends of the anti-buoyancy beam 7. The two ends of the anti-buoyancy beam 7 are abutted against the corresponding supports 223 by anti-buoyancy bolts. Specifically, the anti-buoyancy bolts pass through the ends of the anti-buoyancy beam 7 in a vertical direction, and the bottom end of the anti-buoyancy bolts contacts the supports 223. By utilizing the synergistic effect of the anti-buoyancy beam 7 and the anti-buoyancy bolts, the anti-buoyancy beam 7 and the base plate 11 of the base 1 can jointly clamp the rolled edge plate 22, thereby preventing the side formwork 2 from floating during the concrete pouring process.

[0137] like Figure 10 As shown, a second notch 222 can be made on the rolled edge plate 22 at the position corresponding to the first notch 111 on the base 1. During the formwork erection stage, the first notch 111 and its corresponding second notch 222 together form a square hole, which is sealed by the sealing member 15. The reason for setting the second notch 222 is that during the demolding stage, when the side mold 2 moves closer to the base 1, the rolled edge plate 22 will also move towards the base 1, which may cover the first notch 111. The setting of the second notch 222 can effectively avoid this situation and ensure that the traveling wheel 14 can pass through the first notch 111 normally.

[0138] like Figure 16As shown, the sealing component 15 may include a sealing plate 151 and a fixing member 152. The shape and size of the sealing plate 151 perfectly match the square hole, and can completely cover the square hole. The fixing member 152 is fixedly installed on the upper surface of the sealing plate 151, and the function of the fixing member 152 is to securely connect the entire sealing component 15 to the rolled edge plate 22. The fixing member 152 may be made of channel steel. In addition, a threaded post is pre-set on the rolled edge plate 22. During installation, the threaded post can pass through the fixing member 152, and then be tightened by the matching nut, thereby realizing the connection between the sealing component 15 and the rolled edge plate 22.

[0139] In optional implementations, such as Figure 17 As shown, the traveling wheel 14 may include a roller 141 and a rotating shaft 143. The axis of the rotating shaft 143 is perpendicular to the web plate 12 and is rotatably connected to the web plate 12. The roller 141 is connected to the rotating shaft 143 through a first support arm 142. A second support arm 144 is connected to the rotating shaft 143. By driving the second support arm 144 to rotate around the axis of the rotating shaft 143, the roller 141 can be driven to rotate around the axis of the rotating shaft 143, thereby enabling the roller 141 to move up and down and pass through the first notch 111.

[0140] Figure 18 , Figure 20 as well as Figure 22 The image shows roller 141 in its retracted state, located inside the inner mold assembly. Figure 19 , Figure 21 and Figure 23 The display shows the state of the roller 141 extending from the bottom surface of the inner mold assembly through the first notch 111.

[0141] Specifically, the rotating shaft 143 is horizontally arranged, with both ends protruding from the outer sides of the two webs 12. Both ends of the rotating shaft 143 are connected to rollers 141 via a first support arm 142. The second support arm 144 is located in the gap between the two webs 12. Figure 15 and Figure 16 As shown, a demolding cylinder 10 is also provided in the gap between the two web plates 12. The two ends of the demolding cylinder 10 are respectively hinged to the second support arm 144 and the web plate 12 by pins. By controlling the extension and retraction of the demolding cylinder 10, the up and down movement of the roller 141 is controlled.

[0142] In an optional embodiment, the first sliding plate 3 may include a first side wall plate 31 and a first top panel 32, and the second sliding plate 4 may include a second side wall plate 41 and a second top panel 42. The first top panel 32 is fixedly connected to the top edge of the first side wall plate 31, and the second top panel 42 is rotatably connected to the top edge of the second side wall plate 41. The second top panel 42 can be opened and closed.

[0143] Specifically, a first longitudinal beam 311 is provided on the inner side of the first side wall panel 31, and the first longitudinal beam 311 is arranged along the axial direction of the inner mold assembly. A second longitudinal beam 411 is provided on the inner side of the second side wall panel 41, and the second longitudinal beam 411 is arranged along the axial direction of the inner mold assembly. The first longitudinal beam 311 is used to strengthen the rigidity of the first side wall panel 31, and the second longitudinal beam 411 is used to strengthen the rigidity of the second side wall panel 41. During the formwork support stage, a horizontal support 6 can be provided between the first longitudinal beam 311 and the second longitudinal beam 411. The horizontal support 6 has a length adjustment function and can support the first longitudinal beam 311 and the second longitudinal beam 411, preventing the first sliding plate 3 and the second sliding plate 4 from converging towards the middle, thereby ensuring the stability of the inner mold assembly during the formwork support stage.

[0144] The first top panel 32 and the second top panel 42 can be spliced ​​together to form the top surface of the inner mold assembly. The first top panel 32 and the second top panel 42 can be connected by bolts. At the splicing edge of the first top panel 32 and the second top panel 42, the first top panel 32 is provided with a first oblique cut that slopes upwards, and the second top panel 42 is provided with a second oblique cut that slopes downwards. When splicing, the second oblique cut can be supported precisely on the first oblique cut.

[0145] An adjustable-length vertical support 5 is installed between the inner side of the joint between the first top panel 32 and the second top panel 42 and the base 1. This vertical support 5 is used to provide support for the first top panel 32 and the second top panel 42, preventing the first sliding plate 3 and the second sliding plate 4 from sinking due to their own weight, thereby ensuring that the inner mold assembly remains stable during the mold-building stage.

[0146] During the formwork support stage, the bottom edge of the first side wall panel 31 and the top edge of the corresponding side panel 21, as well as the second side wall panel 41 and the top edge of the corresponding side panel 21, can be fixed with bolts.

[0147] Specifically, the first side wall plate 31 is parallel to the corresponding side plate 21, and the axial direction of the first sliding sleeve 312 is parallel to the first side wall plate 31; the second side wall plate 41 is parallel to the top edge of the corresponding side plate 21, and the axial direction of the second sliding sleeve 412 is parallel to the second side wall plate 41.

[0148] In an optional embodiment, when the cross-sectional dimensions of the inner mold assembly change along the axial direction, the second top panel 42 can be divided into several segments along the axial direction of the inner mold assembly. Each segment is rotatably connected to the top edge of the second side wall panel 41. When there is a height difference between two adjacent segments, a movable cover plate 424 can be provided between the two adjacent segments.

[0149] Specifically, such as Figure 5As shown, the inner mold assembly may include a standard section, a descending section, and an end section. The descending section is located between the standard section and the end section. The top surface of the descending section is lower than the top surface of the standard section. The top surface of the end section is flush with the top surface of the descending section. The cross-sectional width of the end section is smaller than the cross-sectional width of the descending section. The second top panel 42 may include a first rotating plate 421, a second rotating plate 422, and a third rotating plate 423. The first rotating plate 421 is located in the standard section, the second rotating plate 422 is located in the descending section, and the third rotating plate 423 is located in the end section. The first rotating plate 421, the second rotating plate 422, and the third rotating plate 423 are all rotatably connected to the top edge of the second side wall panel 41. A movable cover plate 424 is provided between the first rotating plate 421 and the second rotating plate 422.

[0150] Because the cross-sectional dimensions of the standard section, the descending section, and the end section are different, the rotation axes of the first rotating plate 421, the second rotating plate 422, and the third rotating plate 423 located in these three sections are not on the same straight line, so they need to be rotated and connected separately. Furthermore, because there is a height difference between the top surface of the standard section and the top surface of the descending section, a movable cover plate 424 is provided between the first rotating plate 421 and the second rotating plate 422. When it is necessary to open the first rotating plate 421 and the second rotating plate 422, the movable cover plate 424 can be removed separately, thus not obstructing the rotation and opening of the first rotating plate 421 and the second rotating plate 422.

[0151] Specifically, such as Figures 24 to 26 As shown, the first rotating plate 421, the second rotating plate 422, and the third rotating plate 423 are all connected to the top edge of the second side wall plate 41 via a connecting plate 43. The connecting plate 43 is C-shaped or U-shaped, with one end fixedly connected to the first rotating plate 421, the second rotating plate 422, or the third rotating plate 423, and the other end hinged to the top edge of the second side wall plate 41. The movable cover plate 424 is arranged at an angle and is connected to the first rotating plate 421 and the second rotating plate 422 respectively via bolts.

[0152] In an optional embodiment, a translation trolley 17 can be mounted on the base 1. The bottom of the translation trolley 17 is equipped with moving wheels and snap-on wheels. The translation trolley 17 is supported on the top surface of the top plate 13 by the moving wheels, while the snap-on wheels are located on the bottom surface of the top plate 13. The translation trolley 17 can move along the axial direction of the base 1, thereby enabling the operator to move inside the inner mold assembly, allowing the operator to enter the cavity more conveniently to carry out work. The operator can lie or crawl on the translation trolley 17 to move, dealing with the narrow inner cavity of the inner mold assembly. In this way, the safety risks and inefficiencies that may occur when the operator walks directly inside the inner mold assembly are avoided.

[0153] Example 2 like Figure 30 and Figure 31 As shown, a beam fabrication system includes a transverse movement zone 302, a formwork casting zone 303, and a prestressed tensioning zone 306 arranged in sequence.

[0154] A longitudinal track 3010 is provided between the transverse movement zone 302 and the prestressed tensioning zone 306. The transverse movement zone 302 is provided with a first transverse track 3021, and the prestressed tensioning zone 306 is provided with a second transverse track 3061. The formwork casting zone 303 is provided with a box girder formwork as described in Embodiment 1. The bottom formwork trolley 401 of the box girder formwork can move axially along the longitudinal track 3010. The bottom formwork trolley 401 can move laterally between different longitudinal tracks 3010 via the first transverse track 3021 or the second transverse track 3061.

[0155] Specifically, the bottom of the mold trolley 401 is equipped with longitudinal wheels and transverse wheels. The longitudinal wheels are mounted on the longitudinal track 3010, allowing the mold trolley 401 to move along the longitudinal track 3010. The transverse wheels can be mounted on the first transverse track 3021 or the second transverse track 3061, and the transverse wheels can move up and down. When the mold trolley 401 needs to move along the longitudinal track 3010, the transverse wheels can retract upwards to avoid unnecessary collisions with the longitudinal track 3010. When the mold trolley 401 needs to move along the first transverse track 3021 or the second transverse track 3061, the transverse wheels can extend downwards to support the first transverse track 3021 or the second transverse track 3061, and raise the longitudinal wheels, causing the longitudinal wheels to disengage from the longitudinal track 3010.

[0156] like Figure 30 and Figure 31 As shown, there are ten longitudinal tracks 3010, which are arranged side by side. Eight of them serve as production lines, and two serve as return lines for the bottom mold trolley 401.

[0157] The bottom mold trolley 401 can be electrically driven. The bottom mold trolley 401 is powered by pre-embedded cables.

[0158] In an optional embodiment, a steam curing zone 304 may be provided between the formwork casting area 303 and the prestressed tensioning area 306. The steam curing zone 304 is provided with a steam curing chamber 3041, and the longitudinal track 3010 passes through the steam curing chamber 3041.

[0159] Specifically, such as Figure 33As shown, the dimensions of the curing chamber 3041 need to accommodate the bottom formwork trolley 401 carrying the box girder. Roller shutters are located at both ends of the curing chamber 3041. After the bottom formwork trolley 401 carrying the box girder enters the curing chamber 3041, the roller shutters are closed to form a sealed curing space. Several steam spray pipes 3042 are installed on the inner wall or ceiling of the curing chamber 3041. The steam spray pipes 3042 are used to spray high-temperature steam inside the curing chamber 3041. The steam spray pipes 3042 are connected to the boiler room 3043. The boiler room 3043 provides pressurized steam to the steam spray pipes 3042.

[0160] There are eight curing chambers 3041, located along eight production lines, sharing a single boiler room 3043. Each curing chamber 3041 is equipped with a control system, employing an intelligent controller, electric steam actuators, electric water valves, temperature sensors, and humidity sensors. Based on set temperature and humidity curves, the system automatically calculates and adjusts the amount of steam or water sprayed in real time. It can communicate with a remote monitoring system to transmit the current status of the curing chamber.

[0161] A steam generator is installed in boiler room 3043, and steam spray pipe 3042 is connected to the steam generator. Using steam curing can significantly shorten curing time and construction period, and greatly improve the durability and strength of the box girder. This improves the overall efficiency of construction and ultimately ensures the prefabrication quality of the box girder during construction.

[0162] Specifically, the steam curing chamber 3041 is 4.5m wide, 3.5m high, and 33m long. Two steam spray pipes 3042 are installed on both sides of the steam curing chamber 3041 for steam curing. Three cooling water spray pipes are installed on the walls and top of the steam curing chamber 3041 for cooling the beam structure during curing. The boiler room 3043 is 3.5m wide, 3.5m high, and 33m long. The boiler room 3043 houses five 500KG steam generators using biomass fuel, ensuring a stable steam supply to eight lines. The steam curing chamber 3041 and the boiler room 3043 share a wall. The framework of both the steam curing chamber 3041 and the boiler room 3043 is constructed using galvanized steel pipes, and a 10cm thick insulation board is laid on the outside of the framework. The insulation board reduces heat loss during the heating and insulation stages.

[0163] The box girder is cured using steam curing. Steam curing of concrete can be divided into four stages: static curing, heating, constant temperature, and cooling. The operation procedure is as follows: (1) Heating stage: After demolding, the precast concrete box girder is transferred to the steam curing chamber 3041. Steam is continuously and evenly released into the steam curing chamber 3041 through the steam generator to raise the temperature to a constant temperature of 45℃. The heating time is about 4 hours and the heating rate is ≤10℃ / h. The ambient temperature of the curing environment is measured before heating, which is the starting point of this stage. Temperature and humidity are recorded during the heating stage at a frequency of once every 0.5 hours. Information technology can also be used for real-time monitoring and automatic recording.

[0164] (2) Constant Temperature Stage: The precast concrete box girder is placed in the 3041 curing chamber for 8 hours for constant temperature curing, maintaining the temperature of the 3041 chamber at 45℃±2℃ and controlling the humidity above 95%. At this time, attention should be paid to the temperature control of the 3041 chamber and the regulation of hot steam delivery, especially to deal with the impact of excessively high external temperatures in summer. During the constant temperature stage, temperature and humidity should be recorded at a frequency of once per hour. Real-time monitoring and automatic recording can also be achieved using information technology.

[0165] (3) Cooling stage: After the constant temperature time is reached, the temperature in the steam curing chamber 3041 is reduced from the constant temperature to no less than 20℃. The cooling time should be no less than 4 hours, and the cooling rate should be ≤5℃ / h. During the cooling stage, temperature and humidity records should be kept at a frequency of once every 0.5 hours. Real-time monitoring and automatic recording can also be used. After the precast concrete box girder has been steam cured, the surface of the concrete box girder should be inspected for non-external force cracks by visual observation or crack observation instrument, and the results should be recorded. If cracks are found, the cause should be analyzed in time, and intelligent steam curing should be suspended until the cause is clear. During steam curing, the compressive strength of the test blocks under the same conditions should be tested, or the compressive strength of the surface concrete of the structure should be indirectly determined by the rebound method. The overall requirement is that the strength should be no less than 90% of the design value of the standard test specimen after steam curing. The strength development can be used as the basis for adjusting the steam curing temperature and time.

[0166] (4) Standard curing stage: After the temperature drops to no less than 20℃ during the cooling stage, the air humidity should be maintained above 95%. The curing time should be adjusted appropriately according to the duration of the first three stages to ensure that the beams and slabs are cured in the 3041 steam curing chamber for 8 hours. Temperature and humidity should be recorded during the standard curing stage at a frequency of once per hour.

[0167] In an optional embodiment, a standard curing zone 305 may be provided between the steam curing zone 304 and the prestressed tensioning zone 306, and sprayers are provided on the ground on both sides of the longitudinal track 3010 located in the standard curing zone 305.

[0168] Specifically, the sprinkler is installed in a recess in the ground and is connected to a water pump via a pipe. The sprinkler is used to periodically spray water onto the box girder to ensure continuous maintenance.

[0169] In an optional embodiment, a beam storage area 309 may be provided on the side of the prestressed tensioning zone 306 away from the standard curing zone 305. The beam storage area 309 is equipped with a spray gate 3091. Drainage ditches are provided on the ground of the steam curing zone 304, the standard curing zone 305 and the beam storage area 309, and the drainage ditches are connected to the recycling pool.

[0170] Specifically, the recycling tank is equipped with a water purification system for filtering and purifying the water in the recycling tank. The spray system of the spray gantry 3091, the boiler room 3043 of the steam curing area 304, and the sprayers of the standard curing area 305 are all connected to the recycling tank.

[0171] The beam storage area 309 is also equipped with a gantry crane, which can move between the beam storage area 309 and the prestressing tensioning area 306. After the box girder has completed prestressing tensioning, the box girder is hoisted to the beam storage area 309 for storage using the gantry crane.

[0172] A grouting zone 307 is provided on the side of the prestressed tensioning zone 306 near the beam storage zone 309. The grouting zone 307 is used for grouting the box girder that has completed prestressing tensioning.

[0173] A grouting zone 308 is also provided between the grouting zone 307 and the beam storage zone 309. The grouting zone 308 includes a centralized grouting station 3081, a three-stage sedimentation tank 3082, and a water storage tank 3083. The centralized grouting station 3081 is used to provide grouting materials for the grouting operation. The three-stage sedimentation tank 3082 is used to collect wastewater discharged from the centralized grouting station 3081. The water storage tank 3083 is used to provide a water source for the centralized grouting station 3081.

[0174] In an optional embodiment, a rebar binding area 301 may be provided on the side of the transverse movement area 302 away from the formwork casting area 303. The rebar binding area 301, the transverse movement area 302 and the formwork casting area 303 are located in the factory building. A crane 3011 is provided on the top of the factory building. The crane 3011 can move between the rebar binding area 301, the transverse movement area 302 and the formwork casting area 303.

[0175] In optional implementations, such as Figure 32 As shown, a concrete placing machine 3031 can also be installed on the top of the factory building, and the concrete placing machine 3031 can move within the formwork casting area 303.

[0176] Specifically, the concrete placing boom 3031 may include a crossbeam and a pouring trolley. The crossbeam is mounted on track beams on both sides of the plant and can move along the track beams. The pouring trolley can move along the axial direction of the crossbeam, thereby enabling the pouring trolley to cover the entire formwork pouring area 303, which greatly facilitates the concrete pouring operation of the box girder.

[0177] A transverse passage 3032 may be provided in the formwork casting area 303. The axis of the transverse passage 3032 is perpendicular to the axis of the longitudinal track 3010. The transverse passage 3032 is used to park concrete mixer trucks so as to supply concrete material for casting to the concrete placing boom 3031.

[0178] Example 3 A construction method for box girder formwork, applied to a box girder formwork as described in Example 1, includes the following steps: S1: Assemble the outer and inner mold components and pour the box girder concrete.

[0179] Specifically, the outer formwork assembly of the box girder is constructed first, with two outer formworks 201 spliced ​​on both sides of the bottom formwork trolley 401. Then, the reinforcing bars of the box girder are tied. The base 1, side formwork 2, first sliding plate 3, and second sliding plate 4 of the inner formwork assembly are deployed, and the sealing component 15 is installed at the first notch 111. The traveling wheels 14 are retracted upwards into the internal space of the inner formwork assembly, and vertical supports 5 and horizontal supports 6 are installed. Then, the entire inner formwork assembly is hoisted into the outer formwork assembly. Concrete protective layer spacers are placed between the reinforcing bar skeleton and the inner formwork assembly, and the remaining reinforcing bars are tied. Finally, the concrete of the box girder is poured.

[0180] The joints of the template can be treated with adhesive tape, the joints of the bottom template can be treated with butyl tape, and the top surfaces of the first sliding plate 3 and the second sliding plate 4 can be coated with film.

[0181] S2: After the concrete reaches the demolding strength, remove the sealing piece 15 located at the first notch 111 of the base 1, move the first sliding plate 3 downward relative to the side mold 2 on the same side, move the second sliding plate 4 downward relative to the side mold 2 on the same side, and move the side molds 2 on both sides laterally towards the middle.

[0182] Specifically, remove the sealing component 15, vertical support 5, and horizontal support 6. For example... Figures 27 to 29 As shown, the lifting cylinder 8 located on one side of the first sliding plate 3 is activated to retract downwards. Driven by the lifting cylinder 8, the first sliding plate 3 moves downwards, completing the demolding of the first sliding plate 3. Then, the lifting cylinder 8 located on one side of the second sliding plate 4 is activated to retract downwards. Driven by the lifting cylinder 8, the second sliding plate 4 moves downwards, completing the demolding of the second sliding plate 4. Alternatively, the first sliding plate 3 can be lowered by about 100mm while the second sliding plate 4 begins to lower, achieving a faster operation. Figures 27 to 29 They were shown respectively Figure 5 The state changes of the inner mold assembly during the demolding stage at sections AA, BB, and CC.

[0183] The transverse cylinder 9 is activated to retract laterally. Driven by the transverse cylinder 9, the side molds 2 on both sides move laterally toward the base 1 located in the middle, completing the demolding of the side molds 2. When the side molds 2 move laterally, they can drive the first sliding plate 3 and the second sliding plate 4 to move toward the middle together.

[0184] S3: Extend the walking wheel 14 downwards out of the bottom surface of the base 1 and support it on the bottom surface of the inner cavity of the box beam, so that the base 1, side mold 2, first sliding plate 3 and second sliding plate 4 are lifted upwards.

[0185] Specifically, the demolding cylinder 10 is activated, which drives the roller 141 of the traveling wheel 14 to rotate around the rotating shaft 143 and extend downwards out of the bottom surface of the base 1. Through the reaction force, the base 1 is lifted upwards, thus completing the demolding of the base 1.

[0186] S4: Pull the inner mold assembly out of the inner cavity of the box girder from one end of the box girder to complete the demolding operation of the inner mold assembly.

[0187] Specifically, the inner mold assembly can be connected to the towing device via the traction connector 16. The traction connector 16 is bolted to one end of the base 1. When towing the inner mold assembly, the roller 141 can roll on the bottom surface of the inner cavity of the box girder, thereby reducing the frictional resistance during towing.

[0188] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A box girder formwork, characterized in that, Includes outer mold components and inner mold components; The outer mold assembly includes a bottom mold trolley (401) and two outer molds (201). The top surface of the bottom mold trolley (401) is used to form the bottom surface of the box girder, and the bottom mold trolley (401) can move horizontally; The two outer molds (201) are located on both sides of the bottom mold trolley (401), and the two outer molds (201) are used to form the outer side of the box girder; The inner mold assembly includes a base (1), two side molds (2), a first sliding plate (3), and a second sliding plate (4); The base (1) is provided with a walking wheel (14), which can extend downwards out of the bottom surface of the base (1) and retract upwards; The two side molds (2) are located on both sides of the base (1), and the two side molds (2) can move closer to each other and further away from each other; The first sliding plate (3) and the second sliding plate (4) are slidably connected to the two side molds (2) respectively, and the first sliding plate (3) and the second sliding plate (4) can move up and down relative to the corresponding side mold (2); The base (1), the side mold (2), the first sliding plate (3), and the second sliding plate (4) are used to enclose and form the mold for shaping the internal cavity of the box girder; Lifting cylinders (8) are provided between the first sliding plate (3) and the side mold (2) located on the same side of the base (1), and between the second sliding plate (4) and the side mold (2) located on the same side of the base (1). The inner sides of the first sliding plate (3) and the second sliding plate (4) are respectively provided with a first sliding sleeve (312) and a second sliding sleeve (412). The inner side of the side mold (2) is provided with a guide post (211), and the guide post (211) is sleeved in the first sliding sleeve (312) or the second sliding sleeve (412). The bottom end of the first sliding sleeve (312) is provided with a first positioning member (3121), the bottom end of the second sliding sleeve (412) is provided with a second positioning member (4121), and the top end of the guide post (211) is provided with a locking member (2112). The locking member (2112) is used to connect with the first positioning member (3121) or the second positioning member (4121). The guide post (211) is provided with a guide hole (2111), the first sliding sleeve (312) is provided with a first guide pin (3122), and the second sliding sleeve (412) is provided with a second guide pin (4122). The first guide pin (3122) and the second guide pin (4122) can both pass through the corresponding guide hole (2111). The path of the guide hole (2111) includes a parallel section and an inclined section. The parallel section is parallel to the plane where the side mold (2) is located. The bottom end of the inclined section is connected to the top end of the parallel section. The top end of the inclined section is inclined outward.

2. The box girder formwork according to claim 1, characterized in that, The inner side of the first sliding plate (3) is provided with a plurality of first sliding sleeves (312), and the axes of the plurality of first sliding sleeves (312) are parallel to each other. The inner side of the second sliding plate (4) is provided with a plurality of second sliding sleeves (412), and the axes of the plurality of second sliding sleeves (412) are parallel to each other.

3. A box girder formwork according to claim 1, characterized in that, The outer mold (201) can approach and move away from the bottom mold trolley (401).

4. A box girder formwork according to claim 3, characterized in that, The outer mold (201) is provided with a guide rail (206) below it. The outer mold (201) is mounted on the guide rail (206) by a guide component (207). The axial direction of the guide rail (206) is perpendicular to the axial direction of the outer mold (201). A side-shifting cylinder (208) is connected to the outer side of the outer mold (201). The side-shifting cylinder (208) is used to drive the outer mold (201) to move closer to or away from the bottom mold trolley (401).

5. A box girder formwork according to claim 4, characterized in that, The outer side of the outer mold (201) is provided with a truss, which includes a plurality of horizontal bars (202). The plurality of horizontal bars (202) are distributed along the axial direction of the outer mold (201). One end of each horizontal bar (202) is connected to the outer mold (201). The end of the horizontal bar (202) away from the outer mold (201) is provided with a vertical bar (203). The vertical bar (203) is connected to the outer mold (201). The guide component (207) is disposed below the horizontal bar (202).

6. A box girder formwork according to claim 5, characterized in that, The top of the vertical rod (203) is higher than the top edge of the outer mold (201), and a tie rod (205) is provided between the tops of the vertical rods (203) on both sides.

7. A box girder formwork according to claim 5, characterized in that, The top edge of the outer mold (201) is provided with a comb plate (2011), which is used to form the side elevation of the flange plate of the box girder. A horizontal oil cylinder (2031) is provided between the vertical rod (203) and the comb plate (2011) located on the same side.

8. A box girder formwork according to any one of claims 1-7, characterized in that, A transverse hydraulic cylinder (9) is provided between the base (1) and the side mold (2). A transverse guide rod (212) is provided on the inner side of the side mold (2). A guide sleeve (123) is provided on the base (1). The transverse guide rod (212) is sleeved in the guide sleeve (123).

9. A box girder formwork according to claim 8, characterized in that, The base (1) includes a bottom plate (11), a web plate (12) and a top plate (13). The web plate (12) is located between the bottom plate (11) and the top plate (13). The bottom plate (11) has a first notch (111) for the walking wheel (14) to pass through. A detachable sealing element (15) is provided at the first notch (111).

10. A box girder formwork according to claim 9, characterized in that, The walking wheel (14) includes a roller (141) and a rotating shaft (143). The axis of the rotating shaft (143) is perpendicular to the web plate (12) and is rotatably connected to the web plate (12). The roller (141) is connected to the rotating shaft (143) through a first support arm (142). A second support arm (144) is connected to the rotating shaft (143). By driving the second support arm (144) to rotate around the axis of the rotating shaft (143), the roller (141) can be driven to rotate around the axis of the rotating shaft (143), thereby enabling the roller (141) to move up and down and pass through the first notch (111).

11. A box girder formwork according to claim 9, characterized in that, The first sliding plate (3) includes a first side wall plate (31) and a first top panel (32). The second sliding plate (4) includes a second side wall plate (41) and a second top panel (42). The first top panel (32) is fixedly connected to the top edge of the first side wall plate (31). The second top panel (42) is rotatably connected to the top edge of the second side wall plate (41). The second top panel (42) can be opened and closed.

12. A box girder formwork according to claim 11, characterized in that, When the cross-sectional dimensions of the inner mold assembly change along the axial direction, the second top panel (42) is divided into several segments along the axial direction of the inner mold assembly. Each segment is rotatably connected to the top edge of the second side wall panel (41). When there is a height difference between two adjacent segments, a movable cover plate (424) is provided between the two adjacent segments.

13. A beam fabrication system, characterized in that, The formwork includes a transverse moving zone (302), a formwork casting zone (303), and a prestressed tensioning zone (306) arranged in sequence. A longitudinal track (3010) is provided between the transverse moving zone (302) and the prestressed tensioning zone (306). The transverse moving zone (302) is provided with a first transverse moving track (3021), and the prestressed tensioning zone (306) is provided with a second transverse moving track (3061). The formwork casting zone (303) is provided with a box girder formwork as described in any one of claims 1-12. The bottom formwork trolley (401) of the box girder formwork can move axially along the longitudinal track (3010). The bottom formwork trolley (401) can move laterally between different longitudinal tracks (3010) via the first transverse moving track (3021) or the second transverse moving track (3061).

14. A beam fabrication system according to claim 13, characterized in that, A steam curing zone (304) is provided between the formwork casting area (303) and the prestressed tensioning area (306), and a steam curing chamber (3041) is provided in the steam curing zone (304). The longitudinal track (3010) passes through the steam curing chamber (3041).

15. A beam fabrication system according to claim 14, characterized in that, A standard curing area (305) is provided between the steam curing area (304) and the prestressed tensioning area (306), and sprayers are provided on the ground on both sides of the longitudinal track (3010) located in the standard curing area (305).

16. A beam fabrication system according to claim 15, characterized in that, A beam storage area (309) is provided on the side of the prestressed tensioning zone (306) away from the standard curing zone (305). The beam storage area (309) is provided with a spray gate (3091). Drainage ditches are provided on the ground of the steam curing zone (304), the standard curing zone (305) and the beam storage area (309). The drainage ditches are connected to the recycling pool.

17. A beam fabrication system according to claim 13, characterized in that, The transverse movement area (302) is provided with a rebar binding area (301) on the side away from the formwork casting area (303). The rebar binding area (301), the transverse movement area (302) and the formwork casting area (303) are located in the factory building. The top of the factory building is equipped with an overhead crane (3011). The overhead crane (3011) can move between the rebar binding area (301), the transverse movement area (302) and the formwork casting area (303). The top of the factory building is also equipped with a concrete placing machine (3031). The concrete placing machine (3031) can move within the formwork casting area (303).

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