A method for manufacturing a track beam

Abstract

The present application relates to the technical field of concrete product processing, and particularly relates to a preparation method of a track beam. The method comprises the following steps: arranging prestressed steel bars in a steel bar sheet set, installing a magnetic levitation functional component and the steel bar sheet set provided with the prestressed steel bars at different positions in a mold structure; pouring concrete into the mold structure to obtain a prefabricated track beam; performing primary tension on the prestressed steel bars before the prefabricated track beam is demolded; and performing secondary tension on the prestressed steel bars after the prefabricated track beam is demolded. The present application can set the magnetic levitation functional component and the steel bar framework together in the mold before pouring the concrete, realize one-time pouring forming to obtain a magnetic levitation track beam, and can improve the control precision of the surface structure of the concrete prefabricated beam by pouring the magnetic levitation track beam mold structure in layers.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of concrete product processing, and in particular to a preparation method of a track beam. BACKGROUND

[0002] The high-speed maglev track line adopts the normal-conductor maglev technology, that is, long stator coils are laid on the track, alternating current flows in the coils to generate a magnetic field, and the principle of "like poles repel and opposite poles attract" is used to make the high-speed train and the track produce suspension, and the train moves forward by using the change of the alternating magnetic field. When the train turns, there are soft magnetic steel plates on both sides of the track, and a set of electromagnets are also installed on both sides of the suspension magnets of the train, so that the train and the soft magnetic steel plates on both sides of the track produce repulsive force, and the train will always be on the center line of the track when running.

[0003] In the prior art, the maglev functional parts (including long stator coils, soft magnetic steel plates, sliding steel plates, and sleeves for fixed coils) are respectively manufactured and combined and installed with the precast beam body. Technically, the suspension height of the normal-conductor maglev train is only 8mm-12mm when running, and the appearance size precision of the track beam is very high. However, concrete has the characteristics of shrinkage and creep, which has a significant impact on the appearance size of the beam body. In order to eliminate the impact, the Shanghai high-speed maglev beam body adopts a post-polishing technical method. In addition, the Shanghai high-speed maglev beam body also adopts a technical method of mixing the pretensioning method and the post-tensioning method, which increases the beam body manufacturing cost.

[0004] The present application research personnel found that the existing maglev track beam can be optimized from the production process, material elastic performance utilization, manufacturing cost, and production efficiency in the long-term research. SUMMARY

[0005] According to one aspect of the present application, a preparation method of a track beam is provided, the method comprising the following steps:

[0006] arranging prestressed steel bars in a steel bar sheet set, and installing the maglev functional parts and the steel bar sheet set arranged with the prestressed steel bars in different positions in a mold structure;

[0007] pouring concrete into the mold structure to obtain a precast track beam;

[0008] performing initial tensioning on the prestressed steel bars before the precast track beam is demolded;

[0009] performing secondary tensioning on the prestressed steel bars after the precast track beam is demolded.

[0010] Further, the steel sheet set includes a first steel sheet set, a second steel sheet set, and a third steel sheet set; the prestressed steel is arranged in the steel sheet set, and the magnetic levitation functional part and the steel sheet set provided with the prestressed steel are installed at different positions in the mold structure, including:

[0011] The first steel sheet set is arranged at the bottom of the mold structure.

[0012] The prestressed steel is arranged in the second steel sheet set, and the second steel sheet set provided with the prestressed steel is arranged in the middle of the mold structure.

[0013] The magnetic levitation functional part is arranged in the third steel sheet set, and the third steel sheet set provided with the magnetic levitation functional part is arranged at the upper part of the mold structure.

[0014] Part of the first steel sheet set is arranged with the second steel sheet set.

[0015] Further, the mold structure is poured with concrete to obtain a prefabricated track beam, including:

[0016] The first steel sheet set is poured in the space formed or occupied in the mold structure, and the slump of the concrete poured in the first steel sheet set is controlled within a first index range; the second steel sheet set and the third steel sheet set are poured in the space formed or occupied in the mold structure, and the slump of the concrete is controlled within a second index range.

[0017] The first index range refers to the slump of the concrete being 200mm±20mm, and the second index range refers to the slump of the concrete being 150mm±20mm.

[0018] Further, in the method, the steel sheet in the steel sheet set is composed of longitudinal and transverse steels, and the longitudinal and transverse steels are welded by resistance spot welding to ensure the stability of the steel.

[0019] Further, the mold structure includes a side mold, a stator mold, an inner mold, an end mold, a working platform, and a fixed platform, and the method further includes:

[0020] The side mold is driven to extend and retract by a side mold driving mechanism outside the side mold, the stator mold is driven to extend and retract by a stator mold driving mechanism at the bottom of the stator mold, the end mold is driven to extend and retract by an end mold driving mechanism outside the end mold, and the inner mold is driven to extend and retract by an inner mold driving mechanism inside the inner mold.

[0021] Further, the prestressed steel is initially tensioned before the prefabricated track beam is discharged from the mold; the prestressed steel is secondarily tensioned after the prefabricated track beam is discharged from the mold, comprising:

[0022] The prestressed steel is initially tensioned before the prefabricated track beam is discharged from the mold, and the tension stress is controlled at 60% of the design stress value;

[0023] After the prefabricated track beam is discharged from the mold and stored for a preset time, the deflection change value of the prefabricated track beam is detected, and the prestressed steel is secondarily tensioned according to the deflection value, and the tension value is not greater than 1.05 times of the design tension value.

[0024] Further, the prestressed steel is arranged in the corrugated pipe, and after the secondary tensioning of the prestressed steel is completed, the method further comprises: grouting, anchoring and end sealing treatment of the corrugated pipe. After the prestressed tensioning is completed, the prestressed corrugated pipe should be grouted, and the outer surface of the anchorage device and the outer surface of the beam body end face should be packaged to ensure durability.

[0025] Further, after the grouting, anchoring and end sealing treatment of the corrugated pipe are completed, the method further comprises: installing a long stator coil before the prefabricated track beam is discharged, and discharging after inspection.

[0026] Further, in the method, the magnetic levitation functional part comprises a sliding steel plate, a soft magnetic steel plate, a sleeve pipe and an anchor bar, and is positioned and welded into a block by a special tool, and is assembled in a mold. The contact surface of the magnetic levitation functional part and the concrete is pasted with a fiber cloth.

[0027] Further, the mold structure is poured with concrete to obtain a prefabricated track beam, comprising: covering and curing the prefabricated track beam after layer pouring is completed; wherein the covering and curing mode comprises natural curing and steam curing.

[0028] One or more technical solutions provided in the embodiments of the application can realize the following technical effects:

[0029] (1) By the technical solution of the application, the magnetic levitation functional part and the steel sheet are arranged in the mold before the concrete is poured, and the magnetic levitation track beam is formed by one-time pouring;

[0030] (2) The track beam preparation method of the application can improve the control accuracy of the concrete surface structure by layering the mold structure of the high-speed magnetic levitation track beam;

[0031] (3) The application improves the stress bearing of the whole track beam by twice prestressed tensioning before and after the mold is closed, and prolongs the service life of the track beam. BRIEF DESCRIPTION OF DRAWINGS

[0032] More details, features and advantages of the present application are disclosed in the following description of exemplary embodiments in connection with the attached drawings, in which:

[0033] Figure 1 Assembly diagram of track beam reinforcement sheet set and embedded part provided for an exemplary embodiment of the present application;

[0034] Figure 2 In-mold installation combination diagram of track beam provided for an exemplary embodiment of the present application;

[0035] Figure 3 End mold diagram of track beam provided for an exemplary embodiment of the present application;

[0036] Figure 4a Arrangement side view of track beam bottom stress reinforcement sheet provided for an exemplary embodiment of the present application;

[0037] Figure 4b Arrangement plan view of track beam bottom stress reinforcement sheet provided for an exemplary embodiment of the present application;

[0038] Figure 5a Track beam waist reinforcement front view arrangement diagram provided for an exemplary embodiment of the present application;

[0039] Figure 5b Track beam waist reinforcement left side view arrangement diagram provided for an exemplary embodiment of the present application;

[0040] Figure 5c Track beam waist reinforcement right side view arrangement diagram provided for an exemplary embodiment of the present application;

[0041] Figure 6a Track beam toe reinforcement sheet side view arrangement diagram provided for an exemplary embodiment of the present application;

[0042] Figure 6b Track beam toe reinforcement sheet plan view arrangement diagram provided for an exemplary embodiment of the present application;

[0043] Figure 7a Track beam surface bottom layer reinforcement sheet side view arrangement diagram provided for an exemplary embodiment of the present application;

[0044] Figure 7b Track beam surface bottom layer reinforcement sheet plan view arrangement diagram provided for an exemplary embodiment of the present application;

[0045] Figure 8a Track beam surface reinforcement sheet side view arrangement diagram provided for an exemplary embodiment of the present application;

[0046] Figure 8b Track beam surface reinforcement sheet plan view arrangement diagram provided for an exemplary embodiment of the present application;

[0047] Figure 9 The welding schematic diagram of the track beam maglev functional part provided for an exemplary embodiment of the present application is shown in FIG. 1.

[0048] Reference signs:

[0049] 11 - beam bottom stress steel sheet; 12 - beam waist framework steel; 13 - toe steel sheet; 14 - beam surface bottom steel sheet; 15 - beam surface steel sheet; 21 - maglev functional part; 22 - fiber cloth; 3 - corrugated pipe; 41 - side mold; 42 - stator mold; 43 - inner mold; 44 - end mold; 45 - side mold driving mechanism; 46 - stator mold driving mechanism; 47 - inner mold driving mechanism; 48 - fixed platform; 49 - working platform; 410 - end mold driving mechanism. DETAILED DESCRIPTION

[0050] Embodiments of the present application will be described in more detail by referring to the attached drawings. Although certain embodiments of the present application are shown in the drawings, it is understood that the present application can be carried out by various means, and should not be interpreted as being limited to the embodiments set forth herein, but rather the embodiments are provided for more thorough and complete understanding of the present application. It is understood that the drawings and embodiments of the present application are for illustrative purposes only, and should not be construed as limiting the scope of the present application.

[0051] It should be understood that each of the steps recited in the method embodiments of the present application can be executed in different order, and / or in parallel. In addition, the method embodiments can include additional steps and / or omit the execution of the steps shown. The scope of the present application is not limited in this respect.

[0052] The term "comprising" and variations thereof as used herein are open-ended, that is "including, but not limited to". The term "based on" is "based, at least in part, on". The term "one embodiment" means "at least one embodiment". The term "another embodiment" means "at least one additional embodiment". The term "some embodiments" means "at least some embodiments". Related definitions are given throughout the detailed description. It should be noted that references herein to "first", "second", etc. concepts merely serve to distinguish different apparatuses, modules, or units from each other, and do not imply a sequence or interdependence of the functions performed by these apparatuses, modules, or units.

[0053] It should be noted that the terms "one", "multiple", mentioned in the present application are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise explicitly stated in the context, it should be understood as "one or more".

[0054] The names of the messages or information exchanged between the plurality of devices in the embodiments of the present application are only for illustrative purposes, and are not intended to limit the scope of the messages or information.

[0055] The scheme of the present application is described below with reference to the accompanying drawings.

[0056] In order to optimize the existing high-speed maglev track prefabricated beam, the present application provides a track beam preparation method, which comprises the following steps:

[0057] S1. Arranging the prestressed steel bars in a steel bar sheet set, and installing the maglev functional part and the steel bar sheet set provided with the prestressed steel bars in different positions in a mold structure.

[0058] S2. Pouring concrete into the mold structure to obtain a prefabricated track beam.

[0059] S3. Primary tensioning the prestressed steel bars before the prefabricated track beam is demolded, and secondary tensioning the prestressed steel bars after the prefabricated track beam is demolded.

[0060] Figure 1 The track beam steel bar sheet set and the embedded part assembly schematic diagram provided for an exemplary embodiment of the present application, Figure 2 The in-mold installation combination schematic diagram provided for an exemplary embodiment of the present application.

[0061] As Figures 1-2 shown, the steel bar sheet set mainly comprises three parts: a bottom support steel bar part (first steel bar sheet set) composed of a beam bottom stress steel bar sheet 11 and a toe steel bar sheet 13, a middle steel bar part (second steel bar sheet set) where a beam waist framework steel bar 12 is located, and an upper steel bar part (third steel bar sheet set) composed of a beam surface bottom steel bar sheet 14 and a beam surface steel bar sheet 15.

[0062] In an exemplary specific embodiment, the prestressed steel bars are arranged in the middle steel bar part where the beam waist framework steel bar 12 is located, and the steel bar sheet set of the three parts and the maglev functional part 21 are hoisted and placed into the mold structure as Figure 2 shown;

[0063] After the steel bar sheet set is arranged, concrete is poured into the entire mold structure to obtain a prefabricated track beam;

[0064] After the concrete is poured, the prestressed steel bars are primary tensioned before the mold is opened, and the primary tensioning satisfies a certain set value, and the prestressed steel bars are secondary tensioned after the mold is demolded, and the secondary tensioning satisfies a preset design value.

[0065] Specifically, after the magnetic levitation functional part and the beam body steel reinforcement framework are assembled and formed, the concrete can be poured into the mold in layers, and the beam body surface is smoothed before the concrete is finally cured, and the surface is covered with thermal insulation and maintenance. Among them, the prefabricated beam steel toe reinforcement 13 below is poured as a layer of concrete alone, and the concrete slump is controlled at 200mm±20mm, and the attached vibrator is used for layered vibration, and the vibration time is not more than 10s; then the upper part of the steel reinforcement part composed of the middle part of the beam waist framework reinforcement 12, the beam surface bottom reinforcement sheet 14 and the beam surface reinforcement sheet 15 is poured, and the concrete slump is controlled at 150mm±20mm, and the attached vibrator is used for vibration, and the vibration time is not more than 20s.

[0066] Specifically, when the prestressed reinforcement is tensioned, the beam prestressed tension is carried out in two times, the prestressed initial tension is carried out when the concrete strength under the same condition reaches 75% of the design value before demolding, and the tension stress control is 60% of the design stress; after storing and maintaining for 28 days after demolding, when the concrete strength under the same condition is greater than the design strength, the deflection change value is detected, when the deflection is detected, the front and rear beam body support connecting lines are measured, the maximum value is taken as the deflection value, and the second prestressed tension is carried out, attention should be paid to the change of the deflection value, and the camber is the deflection value generated by applying the train dead load on the beam. The maximum tension value is not greater than 1.05 times of the design value, if the predetermined target cannot be reached, the upper and lower positions or the curvature of the prestressed reinforcement below the beam body can be adjusted.

[0067] In specific embodiments, the steel reinforcement framework formed by the steel reinforcement sheet set is divided into different modules for assembly, and the pouring accuracy of different modules is controlled respectively, which is beneficial to improve the stress bearing of the whole prefabricated beam; at the same time, the embedded parts (such as the prestressed reinforcement and the magnetic levitation functional part of the application) are pre-embedded in the steel reinforcement sheet set, the work load of the later secondary pouring is reduced, and the integral pouring of the two can be combined better. The method provided by the application utilizes the elastic properties of materials to control the dynamic accuracy of the beam body under working condition by means of secondary tension.

[0068] In the application, in step S1, the prestressed reinforcement is arranged in the steel reinforcement sheet set, the magnetic levitation functional part and the steel reinforcement sheet set provided with the prestressed reinforcement are installed at different positions in the mold structure, including the following steps:

[0069] S11. The first steel reinforcement sheet set is arranged at the bottom of the mold structure.

[0070] In specific embodiments, the first set of steel bars corresponds to the bottom force steel bars 11 and the toe steel bars 13, the second set of steel bars corresponds to the beam skeleton steel bars 12, and the third set of steel bars corresponds to the bottom layer steel bars 14 and the surface steel bars 15. Two bottom force steel bars 11 in the first set of steel bars are hoisted into the mold and laid on the bottom of the mold.

[0071] S12. The prestressed steel bars are arranged in the second set of steel bars, and the second set of steel bars with the prestressed steel bars arranged therein is laid in the middle of the mold structure.

[0072] In specific embodiments, the prestressed steel bars are arranged in two beam skeleton steel bars 12 in the second set of steel bars, and then the two beam skeleton steel bars 12 are hoisted into the mold and stand in parallel in the middle of the mold structure.

[0073] As an alternative implementation, the step S12 can first install the beam skeleton steel bars 12, and then arrange the prestressed steel bars in the beam skeleton steel bars 12.

[0074] S13. The first set of steel bars is arranged in the second set of steel bars.

[0075] In specific embodiments, one end of one toe steel bar 13 in the first set of steel bars is inserted into one beam skeleton steel bar 12, and the other end is welded to one bottom force steel bar 11, and one end of the other toe steel bar 13 is inserted into the other beam skeleton steel bar 12, and the other end is welded to the other bottom force steel bar 11.

[0076] S14. The magnetic levitation functional part is arranged in the third set of steel bars, and the third set of steel bars with the magnetic levitation functional part arranged therein is arranged in the upper part of the mold structure.

[0077] In specific embodiments, the magnetic levitation functional part 21 is hoisted into the mold and fixed on both sides of the surface steel bar 15 in the third set of steel bars; then the bottom layer steel bar 14 in the third set of steel bars is hoisted into the mold, so that the bottom layer steel bar 14 is laid on the top of the beam skeleton steel bar 12 and the stator mold 42; finally, the surface steel bar 15 in the third set of steel bars is hoisted into the mold, and the surface steel bar 15 is arranged above the bottom layer steel bar 14.

[0078] As an alternative implementation, the step S14 can also first install the bottom layer steel bar 14, then install the surface steel bar 15, and finally fix the magnetic levitation functional part 21 on both sides of the surface steel bar 15.

[0079] Wherein, before step S14, the two side molds 41 are closed respectively, and the two stator molds 42 are closed.

[0080] In specific embodiments, the beam body steel reinforcement framework and the mold structure and the opening and closing mode of the mold structure can be divided into several different steel reinforcement modules for facilitating welding and hoisting; different steel reinforcement module parts are assembled outside the mold structure, and parts are assembled inside the mold structure, and the sequence is determined according to the fact that the magnetic levitation functional blocks do not collide with the steel reinforcement blocks during actual installation.

[0081] The steel reinforcement piece set, the magnetic levitation functional block and the prestressed steel reinforcement block welding installation of the present application can improve the installation precision of the steel reinforcement framework as a whole.

[0082] The steel reinforcement piece set of the present application is composed of different steel reinforcement mesh combinations, including a first steel reinforcement piece set, a second steel reinforcement piece set and a third steel reinforcement piece set. The steel reinforcement pieces in the steel reinforcement piece set are composed of longitudinal and transverse steel reinforcements and are welded by resistance spot welding.

[0083] In an exemplary embodiment, Figures 4a-4b The track beam bottom stress steel reinforcement piece arrangement side view and top view provided for an exemplary embodiment of the present application; Figures 6a-6b The track beam toe steel reinforcement piece side view arrangement and top view arrangement provided for an exemplary embodiment of the present application.

[0084] As Figures 4a-4b , Figures 6a-6b The specific manufacturing process of the first steel reinforcement piece set (beam bottom stress steel reinforcement piece 11 and toe steel reinforcement piece 13) is as follows: the stress steel reinforcement N1 is cut according to the design size, the first transverse steel reinforcement N2 is bent into a design pattern and placed in a fixed mold at a design interval, the stress steel reinforcement N1 is placed on the first transverse steel reinforcement N2, and the intersection is welded to form the beam bottom stress steel reinforcement piece 11.

[0085] The second transverse steel reinforcement N6 is cut according to the size and bent into a design pattern, and placed in a fixed mold at a design interval, the second longitudinal steel reinforcement N7 is cut according to the design size and placed on the second transverse steel reinforcement N6, and the intersection is welded to form the toe steel reinforcement piece 13.

[0086] Figures 5a-5c The track beam waist steel reinforcement front view arrangement and side view arrangement provided for an exemplary embodiment of the present application.

[0087] As Figures 5a-5cAs shown in the figure, the specific manufacturing process of the second set of steel pieces (beam waist skeleton steel 12) is as follows: the stirrup N3 is cut according to the size, and is bent into a design pattern, the joint is welded, and is placed in a fixed mold according to the design interval, the first longitudinal steel N4 and the positioning steel N5 are cut according to the design size, are penetrated into the stirrup N3, and are welded at the intersection, thereby forming the beam waist skeleton steel 12.

[0088] Figures 7a-7b The track beam surface bottom layer steel piece side view arrangement diagram and the track beam surface steel piece side view arrangement diagram provided by the exemplary embodiment of the present application are shown in the figure. Figures 8a-8b The track beam surface steel piece side view arrangement diagram and the track beam surface steel piece side view arrangement diagram provided by the exemplary embodiment of the present application are shown in the figure.

[0089] As shown in the figure, Figures 7a-7b , Figures 8a-8b As shown in the figure, the specific manufacturing process of the third set of steel pieces (beam surface bottom layer steel piece 14 and beam surface steel piece 15) is as follows: the third transverse steel N8 and the third longitudinal steel N9 are cut according to the design size, the third transverse steel N8 is placed in a fixed mold according to the design interval, the third longitudinal steel N9 is placed on the steel surface of the third transverse steel N8, and the intersection is welded, thereby forming the beam surface bottom layer steel piece 14.

[0090] The third transverse steel N8 is placed in a fixed mold according to the design interval, the third longitudinal steel N9 is placed on the steel surface of the third transverse steel N8, and the intersection is welded, thereby forming the beam surface steel piece 15, and then the standing steel N10 is welded on the third longitudinal steel N9 according to the design interval.

[0091] The present application utilizes the special equipment steel piece set block welding processing, which not only ensures the welding quality and welding precision, but also realizes the mechanization of the process operation.

[0092] Figure 2 The track beam in-mold installation combination schematic diagram provided by the exemplary embodiment of the present application is shown in the figure, Figure 3 The track beam end mold schematic diagram provided by the exemplary embodiment of the present application is shown in the figure.

[0093] As shown in the figure, Figures 2-3 The mold structure designed by the present application includes: a side mold 41, a stator mold 42, an inner mold 43, an end mold 44, a working platform 49, and a fixed platform 48.

[0094] The track precast beam manufacturing method further comprises: closing the mold structure, which is completed by the control system controlling the driving mechanism; wherein the side mold in the mold structure is driven to extend and retract by the side mold driving mechanism outside the side mold, the stator mold is driven to extend and retract by the stator mold driving mechanism at the bottom of the stator mold, the end mold is driven to extend and retract by the end mold driving mechanism outside the end mold, and the inner mold is driven to extend and retract by the inner mold driving mechanism inside the inner mold.

[0095] In specific embodiments, two opposite side molds 41, two opposite end molds 44, one inner mold 47 and two stator molds 42 are arranged on the working platform 49, one inwardly retractable side mold driving mechanism 45 is arranged on the outside of each side mold 41, one upwardly retractable stator mold driving mechanism 46 is arranged at the bottom of each stator mold 42, one inwardly retractable end mold driving mechanism 410 is arranged on the outside of each end mold 44, and one laterally retractable inner mold driving mechanism 47 is arranged inside the inner mold 43. The fixed platform 48 is arranged on the top of the side mold 41 and the end mold 44, and the side mold 41, the end mold 44, the stator mold 42 and the inner mold 47 are driven by the respective driving mechanisms to realize automatic opening and closing.

[0096] The side mold 41 moves horizontally under the action of the side mold driving mechanism 45, and the amount of movement is controlled by the displacement meter in the oil cylinder and software programming. One side of the surface of the side mold 41 is fixedly connected with a fixed support, the stator mold driving mechanism 46 is fixedly connected to the upper surface of the fixed support, the stator mold 42 is fixedly connected to the top end of the stator mold driving mechanism 46, the stator mold 42 is welded from a steel plate and a rectangular tube, the thickness of the steel plate is not less than 18 mm, the dimensional error is less than 0.1 mm, and the flatness is not greater than 1 mm / 5 m. The stator mold 42 moves up and down under the action of the stator mold driving mechanism 46, and the amount of movement is controlled by the displacement meter in the stator mold driving mechanism 46 and software programming.

[0097] In addition, the inner mold driving mechanism 47 is fixedly connected to the middle position of the upper surface of the working platform 49, the top end of the inner mold driving mechanism 47 is fixedly connected with the inner mold 43, the inner mold 43 moves up and down under the action of the inner mold driving mechanism 47, and the amount of movement is controlled by the displacement meter in the inner mold driving mechanism 47 and software programming. The end mold 44 is rotatably connected to the front and rear ends of the working platform 49, the end mold driving mechanism 410 is fixedly connected to the ground in front of the fixed support, and the end mold driving mechanism 410 is rotatably connected with the end mold 44. The end mold 44 moves obliquely under the action of the end mold driving mechanism 410, and the amount of movement is controlled by the displacement meter in the end mold driving mechanism 410 and software programming.

[0098] In specific embodiments, the mold is automatically opened and closed under the drive of the respective driving mechanism, and is locked by a latch.

[0099] The movement amount of each part of the mold is controlled by the displacement meter in the corresponding driving mechanism and software programming, and high-precision control of the mold displacement amount is realized through software programming control.

[0100] The present application formulates a mechanized working operation process for the track beam, improves the operation efficiency, reduces the on-site operation workload, optimizes the operation environment, and reduces the comprehensive cost.

[0101] The prefabricated beam manufacturing method of the present application, the magnetic levitation functional part includes a sliding steel plate, a soft magnetic steel plate, a sleeve pipe and an anchor bar, and the fiber cloth 22 is pasted on the contact surface of the magnetic levitation functional part and the concrete.

[0102] The prefabricated beam manufacturing method of the present application, the cover curing is performed after the layered pouring into the mold structure, wherein the cover curing method is divided into natural curing or steam curing, the cover curing method can be selected according to the environmental temperature, humidity and product production efficiency, and the gas temperature of the steam curing is not more than 45 DEG C.

[0103] In specific embodiments, the cover curing after the concrete pouring generally does not select steam curing when the environmental temperature is above 25 DEG C, but adopts a shed cover curing method, and the shed humidity is controlled to be greater than 95%, the product curing strength should reach 75% of the design strength after 72h of curing, otherwise, steam curing measures should be increased at night.

[0104] As shown in Figures 5a-5c The prefabricated beam manufacturing method of the present application, the prestressed steel bar is arranged in the corrugated pipe 3, and after the secondary tensioning of the prestressed steel bar is completed, the corrugated pipe 3 is grouted, anchored and sealed.

[0105] In specific embodiments, after the prestressed tensioning is completed, the prestressed corrugated pipe is vacuum grouted, the outer surface of the anchor and the outer surface of the beam body end face are encapsulated with epoxy resin mortar to ensure durability.

[0106] Figure 9The welding schematic diagram of the track beam maglev functional part provided for an exemplary embodiment of the present application is shown.

[0107] As shown in Figure 9 The maglev functional part is composed of soft magnetic steel plate, sliding steel plate, cast iron sleeve and anchor bar, is a high-precision welded part, and needs to be positioned by special tooling equipment to ensure precision. At the same time, due to the different material properties, different welding temperatures need to be controlled, for example, the soft magnetic steel plate welding needs 1350℃, and needs special welding rod. The cast iron sleeve needs to be further distinguished in material, different preheating temperature and different welding rod are adopted, the anchor bar and the sliding steel plate can be welded by CO2 shielded welding. Due to the complex welding process and high welding condition requirement, automatic welding is needed to complete the corresponding task.

[0108] The prefabricated beam manufacturing method of the present application installs the long stator coil before the track beam leaves the factory after the grouting, anchoring and end sealing treatment of the corrugated pipe are completed, and leaves the factory after inspection.

[0109] The long stator coil is installed in the factory before the prefabricated maglev track beam product leaves the factory, and leaves the factory after inspection, which reduces the on-site operation time and optimizes the operation environment.

[0110] The above description is only some embodiments of the present application and an explanation of the technical principles applied. Those skilled in the art should understand that the disclosed range of the present application is not limited to the technical solutions formed by the specific combination of the above technical features, and should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the disclosed concept. For example, the above features are replaced with the technical features disclosed in the present application (but not limited to) having similar functions to form technical solutions.

[0111] Although some specific embodiments of the present application have been described in detail through examples, those skilled in the art should understand that the above examples are only for illustration, not for limiting the scope of the present application. Those skilled in the art should understand that the above embodiments can be modified without departing from the scope and spirit of the present application. The scope of the present application is defined by the appended claims.

Claims

1. A method of manufacturing a track beam, characterized by, The method comprises the following steps: arranging prestressed steel bars in a steel bar sheet set, the steel bar sheet set comprising a first steel bar sheet set, a second steel bar sheet set, and a third steel bar sheet set, and installing a magnetic levitation functional component and the steel bar sheet set arranged with the prestressed steel bars at different positions in a mold structure, comprising: arranging the first steel bar sheet set at the bottom of the mold structure; arranging the prestressed steel bars in the second steel bar sheet set, and arranging the second steel bar sheet set arranged with the prestressed steel bars at the middle of the mold structure; arranging the magnetic levitation functional component in the third steel bar sheet set, and arranging the third steel bar sheet set arranged with the magnetic levitation functional component at the upper part of the mold structure; pouring concrete into the mold structure to obtain a prefabricated track beam, comprising: pouring the first steel bar sheet set into the space formed by the mold structure, and controlling the slump of the concrete poured in the first steel bar sheet set within a first index range; pouring the second steel bar sheet set and the third steel bar sheet set into the space formed by the mold structure and controlling the slump of the concrete within a second index range; performing primary tensioning on the prestressed steel bars before the prefabricated track beam is demolded, and performing secondary tensioning on the prestressed steel bars after the prefabricated track beam is demolded, comprising: controlling the primary tensioning stress at 60% of the design stress value; measuring the deflection value of the prefabricated track beam after a preset time of storage after the prefabricated track beam is demolded, and performing secondary tensioning on the prestressed steel bars according to the deflection value, the secondary tensioning value being not greater than 1.05 times of the design tensioning value.

2. The method of manufacturing a track beam according to claim 1, wherein The steel bar sheet in the steel bar sheet set is composed of longitudinal and transverse steel bars, and the longitudinal and transverse steel bars are welded by resistance spot welding.

3. The method of claim 1, wherein the beam is a rail beam. The mold structure comprises a side mold, a stator mold, an inner mold, an end mold, a working platform, and a fixed platform, and the method further comprises: the side mold is driven to extend and retract by a side mold driving mechanism outside the side mold, the stator mold is driven to extend and retract by a stator mold driving mechanism at the bottom of the stator mold, the end mold is driven to extend and retract by an end mold driving mechanism outside the end mold, and the inner mold is driven to extend and retract by an inner mold driving mechanism inside the inner mold.

4. The method of claim 1, wherein The method further comprises: arranging the prestressed steel bars in a corrugated pipe; after completing the secondary tensioning on the prestressed steel bars, performing grouting, anchor sealing, and end sealing treatment on the corrugated pipe.

5. The method of claim 4, wherein the beam is a rail beam. after completing the grouting, anchor sealing, and end sealing treatment on the corrugated pipe, the method further comprises: installing a long stator coil on the prefabricated track beam before the prefabricated track beam is delivered.

6. The method of claim 1, wherein the beam is a rail beam. The magnetic levitation functional component comprises a sliding steel plate, a soft magnetic steel plate, a sleeve, and an anchor bar, and a fiber cloth is arranged on the contact surface of the magnetic levitation functional component and the concrete.

7. The method of claim 1, wherein the beam is a rail beam. Pouring concrete into the mold structure to obtain a prefabricated track beam, comprising: performing covering curing on the prefabricated track beam after completing the layered pouring; wherein the covering curing mode comprises natural curing and steam curing.

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