Beam-rail integrated maglev rail assembly and construction method thereof

Abstract

The application relates to the technical field of magnetic levitation tracks, and provides a beam-track integrated magnetic levitation track assembly and a construction method thereof, which comprises a beam body, a plurality of prefabricated bridge deck slabs are sequentially arranged on a prefabricated composite beam in the longitudinal direction, the prefabricated bridge deck slabs are provided with anchoring through holes, the prefabricated composite beam is provided with anchoring steel bars, the anchoring steel bars are inserted into the anchoring through holes to realize anchoring connection, and an adjusting gap is left between the anchoring through holes and the anchoring steel bars; track units, a plurality of track units are sequentially arranged on the two sides of the prefabricated bridge deck slabs in the longitudinal direction, the positions of the track units on the prefabricated bridge deck slabs are adjusted through the assembly gaps between the components in the track units and the assembly gaps between the track units and the prefabricated bridge deck slabs; and motor reaction plates, the beam body is provided with the motor reaction plates on the two sides in the longitudinal direction, and the motor reaction plates are arranged on the plurality of track units on the sides. The application can realize the millimeter-level positioning precision control of the magnetic levitation track beam, the lightweight of the structure and the quick mounting and dismounting of the components.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of maglev track technology, in particular to a beam-track integrated maglev track assembly and a construction method thereof. BACKGROUND

[0002] Maglev transportation has great application potential in urban internal transportation, airport connection lines and city (suburban) railways due to its low running noise, strong climbing ability and small turning radius. However, the maglev system requires millimeter-level precision control of track geometry, which is far beyond the requirements of conventional track transportation. This technical threshold leads to two core technical bottlenecks in existing maglev projects:

[0003] First, the structural system limitation problem is prominent: the traditional maglev track beam generally adopts a beam-track separation structure. The main reason is that the manufacturing precision of conventional prestressed concrete beams cannot meet the millimeter-level requirements of the maglev system, and only post-track adjustment can achieve the running precision. This passive precision control method not only requires additional auxiliary facilities such as sleepers, significantly increasing the project cost, but also has the problem of three-coupling vibration of train, track and beam, which seriously affects the running stability and riding comfort.

[0004] Second, the technical shackles of traditional construction technology: the existing maglev track beam mostly adopts prestressed concrete box beam structure, which has problems such as excessive self-weight, relatively poor durability, and difficult transportation and hoisting. More importantly, the traditional cast-in-place concrete technology cannot realize fabricated construction, with long construction period and low efficiency; the shrinkage and creep deformation of ordinary concrete is large, which is difficult to guarantee the millimeter-level precision for a long time; once the structure is formed, precision adjustment and component replacement cannot be realized, and if it needs to be demolished and reconstructed, it will bring huge economic losses.

[0005] In addition, there is also a beam-track integrated maglev track assembly in the existing technology. Although the beam-track integrated structure has significant advantages in theory, the traditional construction technology cannot guarantee the millimeter-level manufacturing precision of the beam body, so the track precision completely depends on the beam body precision, which seriously restricts the application of beam-track integrated structure in actual projects.

[0006] In summary, there is an urgent need for a beam-track integrated maglev track assembly and a construction method to solve the problems in the existing technology. SUMMARY

[0007] The present application aims to provide a beam-track integrated maglev track assembly, which aims to solve the problems of high cost of beam-track separated maglev beam, difficulty in guaranteeing the construction precision of beam-track integrated maglev beam, difficulty in track beam post-precision adjustment, track post-replacement and maintenance in the existing technology. The specific technical scheme is as follows:

[0008] A beam-rail integrated maglev rail assembly comprises:

[0009] A beam body comprising a prefabricated composite beam and a prefabricated bridge deck, a plurality of prefabricated bridge decks are sequentially arranged on the prefabricated composite beam in the longitudinal direction, and the adjacent prefabricated bridge decks are fixedly connected; the prefabricated bridge deck is provided with an anchoring through hole, and the prefabricated composite beam is provided with an anchoring steel bar for connecting with the prefabricated bridge deck, the anchoring steel bar extends into the anchoring through hole to realize anchoring connection, and an adjusting gap is left between them;

[0010] A rail unit, a plurality of rail units are sequentially arranged on both sides of the prefabricated bridge deck in the longitudinal direction, the position of the rail unit on the prefabricated bridge deck is adjusted through the assembly gap between the components in the rail unit and the assembly gap between the rail unit and the prefabricated bridge deck;

[0011] A motor reaction plate, the beam body is provided with a motor reaction plate on both sides in the longitudinal direction, and the motor reaction plate is arranged on a plurality of rail units on the side.

[0012] Preferably, the rail unit comprises a rail, a steel base plate, a connecting piece and a fixing bolt, installation clamping grooves are arranged on both sides of the prefabricated bridge deck in the longitudinal direction, the rail is arranged on the lower surface of the prefabricated bridge deck, the steel base plate is arranged on the upper surface of the prefabricated bridge deck and the motor reaction plate is arranged on the steel base plate, the connecting piece is clamped in the installation clamping groove and the upper side and the lower side of the connecting piece are provided with threaded holes, installation holes one are arranged on the rail and the steel base plate, the rail and the lower side of the connecting piece and the steel base plate and the upper side of the connecting piece are connected through the fixing bolt, and an assembly gap is left between the installation hole one and the fixing bolt.

[0013] Preferably, installation holes two are arranged on the steel base plate and the rail, limit screw holes are arranged on the prefabricated bridge deck, the steel base plate and the prefabricated bridge deck and the rail and the prefabricated bridge deck are connected through limit bolts, and an assembly gap is left between the installation hole two and the limit bolt;

[0014] Alternatively, limit grooves are arranged on the upper surface and the lower surface of both sides of the prefabricated bridge deck, the steel base plate is arranged in the limit groove on the upper surface, the rail is arranged in the limit groove on the lower surface, the width of the limit groove on the upper surface is greater than the width of the steel base plate by M millimeters to form an assembly gap, and the width of the limit groove on the lower surface is greater than the width of the rail by N millimeters to form an assembly gap.

[0015] Preferably, an anchoring groove is arranged on the prefabricated bridge deck, the anchoring through hole is arranged in the anchoring groove, the outer surface of the anchoring steel bar is provided with an external thread, and the anchoring steel bar is fastened through the anchoring through hole by using an anchoring nut.

[0016] Preferably, the prefabricated composite beam comprises a composite web, an end diaphragm and an intermediate diaphragm, two composite webs are arranged in parallel, and the ends of the two composite webs are connected by the end diaphragm, a plurality of intermediate diaphragms are arranged longitudinally between the two composite webs, and the composite web, the end diaphragm and the intermediate diaphragm are all provided with anchoring steel bars for connecting with the prefabricated bridge deck;

[0017] The composite web comprises a UHPC web and a T-shaped steel beam arranged below the UHPC web;

[0018] The T-shaped steel beam comprises a steel bottom plate and a steel web arranged on the steel bottom plate, the upper edge of the steel web is alternately provided with a steel pin and a mortise, the steel pin and the mortise are embedded in the concrete inside the lower end of the UHPC web, and are arranged in butt joint with the web steel framework in the UHPC web.

[0019] Preferably, the UHPC web comprises a web concrete layer and a web steel framework arranged in the web concrete layer;

[0020] The web steel framework comprises upper open stirrups, lower open stirrups, web longitudinal steel bars and bottom layer longitudinal steel bars; the upper open stirrups and the lower open stirrups are alternately arranged in the longitudinal direction, the lower open stirrups are arranged in one-to-one correspondence with the steel pins, the steel pins are inserted into the openings at the lower ends of the lower open stirrups, and the upper open stirrups are arranged in one-to-one correspondence with the mortises, and the lower ends of the upper open stirrups are arranged in the mortises;

[0021] A plurality of web longitudinal steel bars are arranged in the vertical direction inside the upper open stirrups and the lower open stirrups, and a single web longitudinal steel bar passes through the alternately arranged upper open stirrups and lower open stirrups in the longitudinal direction;

[0022] The two sides of the lower end of each lower open stirrup are respectively connected by bottom layer longitudinal steel bars.

[0023] Preferably, the upper ends of the upper open stirrups protrude from the upper surface of the prefabricated composite beam, the end diaphragm and the intermediate diaphragm are both provided with a diaphragm steel framework, the diaphragm steel framework is provided with vertical steel bars protruding from the upper surface of the prefabricated composite beam, and the upper open stirrups and the parts of the vertical steel bars protruding from the upper surface of the prefabricated composite beam serve as anchoring steel bars and are provided with external threads on the outer surfaces.

[0024] The application provides a construction method of a magnetic levitation track assembly with a beam rail, comprising:

[0025] S1, hoisting the prefabricated composite beam that is integrally prefabricated to the pier support, and completing the position adjustment of the prefabricated composite beam through the pier support;

[0026] S2, prefabricated bridge deck pre-assembly, specifically: the prefabricated bridge deck is assembled to the prefabricated composite beam in sequence, the anchoring steel bar in the anchoring through hole is installed on the anchoring nut after the anchoring steel bar in the anchoring through hole, and the anchoring nut is pre-tightened;

[0027] S3, the position adjustment of all prefabricated bridge decks is carried out by using the adjustment gap between the anchoring steel bar and the anchoring through hole, and the accurate positioning of each prefabricated bridge deck is completed;

[0028] S4, material filling is carried out in the gap between the prefabricated composite beam and the prefabricated bridge deck and the gap between the anchoring steel bar and the anchoring through hole, and the anchoring nut is tightened when the filling material meets the strength requirement;

[0029] S5, the connection between the two adjacent prefabricated bridge decks in the longitudinal direction is completed, so that the prefabricated bridge decks form an integral whole;

[0030] S6, each track unit is installed in sequence, and the accurate positioning and tightening of each track unit are completed one by one by using the assembly gap between the components in the track unit and the assembly gap between the track unit and the prefabricated bridge deck;

[0031] S7, material filling is carried out in the assembly gap between the track unit and the prefabricated bridge deck and the assembly gap between the components in the track unit, and the motor reaction plate is installed when the filling material meets the strength requirement.

[0032] The application also provides another construction method of the beam-rail integrated magnetic levitation rail assembly, the length of the prefabricated bridge deck is an integer multiple of the length of the track unit, and the construction method comprises:

[0033] Q1, each track unit on the prefabricated bridge deck is installed in a prefabrication factory, and the accurate positioning and tightening of each track unit are completed one by one by using the assembly gap between the components in the track unit and the assembly gap between the track unit and the prefabricated bridge deck;

[0034] Q2, material filling is carried out in the assembly gap between the track unit and the prefabricated bridge deck and the assembly gap between the components in the track unit, and the track unit assembly is completed when the filling material meets the strength requirement;

[0035] Q3, the prefabricated composite beam is hoisted to the pier support, and the position adjustment of the prefabricated composite beam is completed through the pier support;

[0036] Q4, the prefabricated bridge deck after installing the track unit is assembled to the prefabricated composite beam in sequence, the position adjustment of all prefabricated bridge decks is carried out by using the adjustment gap between the anchoring steel bar and the anchoring through hole, and the accurate positioning of each prefabricated bridge deck is completed;

[0037] Q5, material filling is carried out in the gap between the prefabricated composite beam and the prefabricated bridge deck and the gap between the anchoring steel bar and the anchoring through hole, and the prefabricated bridge deck is fastened by the anchoring nut after the filling material meets the strength requirement;

[0038] Q6, the connection between the two adjacent prefabricated bridge decks in the longitudinal direction is completed, so that the prefabricated bridge decks form an integral whole;

[0039] Q7, the motor reaction plate is installed.

[0040] The application further provides a third construction method of the beam-rail integrated maglev rail assembly, comprising:

[0041] C1, the prefabricated composite beam is hoisted to the pier support, and the position adjustment of the prefabricated composite beam is completed through the pier support;

[0042] C2, prefabricated bridge deck pre-assembly, specifically: the prefabricated bridge deck is assembled to the prefabricated composite beam in sequence, the anchoring nut is installed on the anchoring steel bar after the anchoring steel bar of the prefabricated composite beam extends into the anchoring through hole, and the anchoring nut is pre-tightened;

[0043] C3, each rail unit is installed in sequence, and the positioning and pre-tightening of each rail unit are completed one by one by using the assembly gap between the components in the rail unit, the assembly gap between the rail unit and the prefabricated bridge deck and the adjustment gap between the anchoring steel bar and the anchoring through hole;

[0044] C4, material filling is carried out in the gap between the prefabricated composite beam and the prefabricated bridge deck and the gap between the anchoring steel bar and the anchoring through hole, and the anchoring nut is fastened after the filling material meets the strength requirement;

[0045] C5, the connection between the two adjacent prefabricated bridge decks in the longitudinal direction is completed, so that the prefabricated bridge decks form an integral whole;

[0046] C6, the positioning of each rail unit is checked again, if there is a rail unit that does not meet the positioning requirement, the rail unit is repositioned by using the assembly gap between the components in the rail unit and the assembly gap between the rail unit and the prefabricated bridge deck, if all the rail units meet the positioning requirement, the fastening of each rail unit is completed first, and then the material filling is carried out in the assembly gap between the rail unit and the prefabricated bridge deck and the assembly gap between the components in the rail unit, and the motor reaction plate is installed after the filling material meets the strength requirement.

[0047] The technical scheme of the application has the following beneficial effects:

[0048] The application adopts a construction mode of factory prefabrication + on-site assembly, the prefabricated composite beam and the prefabricated bridge deck can be standardized in the factory, and only assembly connection and a small amount of pouring (only a small amount of pouring is needed when the adjacent prefabricated bridge decks are connected by a wet joint) are needed on site, which can significantly improve the construction efficiency and engineering quality compared with the traditional cast-in-place construction mode. At the same time, factory prefabrication can significantly improve the manufacturing precision of the prefabricated composite beam and the prefabricated bridge deck, providing a good accessory basis for subsequent track precision adjustment.

[0049] In the application, a plurality of track units are arranged on the prefabricated bridge deck in sequence along the longitudinal direction. Compared with the traditional continuous or integral track unit, the separated track unit has the advantages of more flexible installation precision adjustment (i.e., each track unit can be independently adjusted and corrected for errors), simpler prefabrication, easier linear control, and easier modular disassembly and maintenance.

[0050] The triple precision adjustment system ensures millimeter-level precision control of the track. Specifically, the installation precision of the beam body is adjusted by the pier support, the installation precision of the prefabricated bridge deck is adjusted by the adjustment gap between the anchoring steel bar and the anchoring through hole, and the position of the single track unit on the prefabricated bridge deck is adjusted by the assembly gap between the components in the track unit and the assembly gap between the track unit and the prefabricated bridge deck. The triple precision adjustment system cooperates with the separated prefabricated bridge deck and the separated track unit to comprehensively realize millimeter-level geometric precision control of the track, meet the stringent precision requirements of the magnetic levitation transportation system, and break through the technical bottleneck that the traditional beam-rail integrated structure is difficult to guarantee the construction precision.

[0051] In the application, the prefabricated bridge deck and the prefabricated composite beam are connected by bolts, and the track unit is connected by insertion. The key components in the application can be independently disassembled and replaced. When the bridge deck precision does not meet the requirements or durability problems occur, the bridge deck can be replaced individually. The track unit can also be quickly disassembled and repaired, greatly reducing the whole life cycle maintenance cost.

[0052] The application uses H-shaped steel to form a T-shaped steel beam with a shear connector, which does not need to weld shear connectors on site, completely avoids welding defects, residual stress and other quality problems, and improves the fatigue performance. The prefabricated composite beam structure does not need to be configured with prestress, eliminating the complex processes such as prestress tensioning and grouting, greatly simplifying the construction process and improving the structural reliability.

[0053] The application uses a reasonable material configuration of the prefabricated bridge deck bearing pressure, the UHPC web resisting shear and bearing part of the tensile stress, and the T-shaped steel beam resisting tension, which fully utilizes the advantages of each material. Compared with the traditional prestressed concrete box girder, the structure weight is reduced by about 50%, which greatly reduces the transportation and hoisting difficulty and engineering cost.

[0054] The end transverse plate, the intermediate transverse plate and the UHPC web plate in the application are all made of ultra-high performance concrete (i.e. UHPC concrete), so as to strengthen the overall stress performance of the prefabricated composite beam. The UHPC has the characteristics of ultra-high strength (compressive strength ≥ 120 MPa), low shrinkage and creep, high durability and the like, and the shrinkage and creep of the prefabricated UHPC component are basically completed, which is beneficial to guarantee the long-term linear stability of the track beam.

[0055] The application realizes the successful application of the beam-rail integrated structure in engineering through the innovative structural design and construction process, avoids the problem that the traditional beam-rail separation structure needs to additionally set track supports and other facilities, changes the three-coupling vibration of the train, track and beam into two-coupling vibration of the train and track beam, and improves the dynamic performance of the structure. The application successfully solves the technical problems of light weight, high precision and maintainability of the maglev track beam through the innovative design of the assembly type construction, three-precision adjustment and detachable structure, and provides key technical support for the industrialization popularization of the maglev transportation.

[0056] In addition to the purposes, features and advantages described above, the application has other purposes, features and advantages. The application will be further described below with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0057] The accompanying drawings, which form a part of this application, are included to provide a further understanding of the application, and are incorporated in and constitute a part of this application. The embodiments of the application illustrated in the drawings, and their description thereto, are presented to provide the practitioner of the art with a thorough and enabling disclosure of the application, and are included as a part of this application. In the drawings:

[0058] Figure 1 is an axonometric view of the maglev track assembly in the application;

[0059] Figure 2 is Figure 1 is a schematic view of the installation of the track unit in the prefabricated bridge deck in the application;

[0060] Figure 3 is Figure 1 is a cross-sectional view of the maglev track assembly in the application along the transverse direction;

[0061] Figure 4 is Figure 3 is an enlarged view of A in the application;

[0062] Figure 5 is Figure 1 is a schematic view of the prefabricated bridge deck structure in the application;

[0063] Figure 6 is Figure 1 is another schematic view of the prefabricated bridge deck in the application;

[0064] Figure 7 is Figure 1 is a longitudinal sectional view of the wet joint in the application;

[0065] Figure 8 is Figure 1 the isometric view of the prefabricated composite beam in

[0066] Figure 9 is Figure 1 the butt joint schematic between the T-shaped steel beam and the web steel framework in the UHPC web plate in

[0067] Figure 10 is Figure 9 the local enlarged view at B in

[0068] Figure 11 is the adjustment gap schematic between the anchoring steel bar and the anchoring through hole;

[0069] , wherein 1, prefabricated composite beam, 1.1, T-shaped steel beam, 1.2, UHPC web plate, 1.3, end diaphragm, 1.4, intermediate diaphragm, 1.5, upper open stirrup, 1.6, lower open stirrup, 1.7, web longitudinal steel bar, 1.8, mortise, 1.9, steel pin, 1.10, steel web plate, 1.11, steel bottom plate, 1.12, bottom layer longitudinal steel bar, 2, prefabricated bridge deck, 2.1, installation clamping groove, 2.2, limiting screw hole, 2.3, anchoring groove, 2.4, anchoring through hole, 2.5, bridge deck longitudinal steel bar, 2.6, wet joint pouring groove, 2.7, limiting groove, 3, wet joint, 3.1, wet joint transverse steel bar, 4, motor reaction plate, 5, track unit, 5.1, track, 5.2, steel backing plate, 5.3, connecting piece, 5.4, fixing bolt, 5.5, limiting bolt. DETAILED DESCRIPTION

[0070] In order to facilitate the understanding of the present application, the present application will be described more fully below, and preferred embodiments of the present application will be given. However, the present application can be realized in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0071] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0072] Embodiment:

[0073] Referring to Figures 1-11 , the embodiment provides a beam-rail integrated maglev rail assembly, comprising:

[0074] Beam body, comprising prefabricated composite beam 1 and prefabricated bridge deck 2, a plurality of prefabricated bridge decks 2 are sequentially laid on the prefabricated composite beam 1 in the longitudinal direction, and the adjacent prefabricated bridge decks 2 are fixedly connected to form a whole; The prefabricated bridge deck 2 is provided with an anchoring through hole 2.4, and the prefabricated composite beam 1 is provided with an anchoring steel bar for connecting with the prefabricated bridge deck 2, the anchoring steel bar extends into the anchoring through hole 2.4 to realize anchoring connection, and an adjusting gap is left between them;

[0075] Track unit 5, a plurality of track units 5 are sequentially arranged on both sides of the prefabricated bridge deck 2 in the longitudinal direction, and the position of the track unit 5 on the prefabricated bridge deck 2 is adjusted through the assembly gap between the components in the track unit 5 and the assembly gap between the track unit 5 and the prefabricated bridge deck 2;

[0076] Motor reaction plate 4, the beam body is provided with a motor reaction plate 4 on both sides in the longitudinal direction, and the motor reaction plate 4 is arranged on a plurality of track units 5 on the side.

[0077] As shown in Figure 2 The track unit 5 comprises a track 5.1, a steel base plate 5.2, a connecting piece 5.3 and a fixing bolt 5.4, the prefabricated bridge deck 2 is provided with a mounting clamping groove 2.1 on both sides in the longitudinal direction, the track 5.1 is arranged on the lower surface of the prefabricated bridge deck 2, the steel base plate 5.2 is arranged on the upper surface of the prefabricated bridge deck 2, and the motor reaction plate 4 is arranged on the steel base plate 5.2, the connecting piece 5.3 is clamped in the mounting clamping groove 2.1, and the upper side and the lower side of the connecting piece 5.3 are provided with threaded holes, the track 5.1 and the steel base plate 5.2 are provided with mounting holes one, the track 5.1 and the lower side of the connecting piece 5.3 are connected through the fixing bolt 5.4, and the upper side of the steel base plate 5.2 and the connecting piece 5.3 are connected through the fixing bolt 5.4, and the mounting hole one and the fixing bolt 5.4 leave an assembly gap.

[0078] Specifically, the fixing bolt 5.4 passes through the mounting hole one on the track 5.1 and is connected with the threaded hole on the lower side of the connecting piece 5.3, the fixing bolt 5.4 passes through the mounting hole one on the steel base plate 5.2 and is connected with the threaded hole on the upper side of the connecting piece 5.3, and the mounting hole one and the fixing bolt 5.4 leave an assembly gap, which can meet the demand of relative position adjustment between the track 5.1 and the steel base plate 5.2 in the track unit 5, and facilitate the adjustment of the installation precision of the track 5.1.

[0079] Preferably, the mounting slot 2.1 is a square slot with an opening facing outward, the mounting slot 2.1 penetrates the prefabricated bridge deck 2 in the vertical direction, so that the connecting piece 5.3 can be pushed into the mounting slot 2.1 from the outside, and the connection between the connecting piece 5.3 and the steel pad plate 5.2 and the track 5.1 is completed. Further, the prefabricated bridge deck 2 is prefabricated in the factory, and has high dimensional accuracy itself, the connecting piece 5.3 is clamped in the mounting slot 2.1, and the mounting slot 2.1 can provide accurate longitudinal positioning basis for the track unit, compared with the traditional embedded connecting piece, the reliability and positioning accuracy of the embodiment are higher.

[0080] Further, the track unit 5 is assembled on the prefabricated bridge deck 2, and the longitudinal displacement of the track unit 5 can be limited by the cooperation of the connecting piece 5.3 and the mounting slot 2.1. In order to limit the lateral displacement of the track unit 5 on the prefabricated bridge deck 2, the embodiment provides two structures to realize the lateral limiting of the track unit 5, which are:

[0081] As shown in Figures 2-5 , the steel pad plate 5.2 and the track 5.1 are both provided with mounting holes two, the prefabricated bridge deck 2 is provided with a limiting screw hole 2.2, the steel pad plate 5.2 and the prefabricated bridge deck 2 and the track 5.1 and the prefabricated bridge deck 2 are connected by limiting bolts 5.5, and the mounting holes two and the limiting bolts 5.5 leave assembly gaps;

[0082] Specifically, the limiting bolt 5.5 passes through the mounting hole two on the steel pad plate 5.2 to connect the upper half of the limiting screw hole 2.2, and the limiting bolt 5.5 passes through the mounting hole two on the track 5.1 to connect the lower half of the limiting screw hole 2.2, the mounting hole two and the limiting bolt 5.5 leave assembly gaps, which can realize the position adjustment of the track 5.1 and the steel pad plate 5.2 relative to the prefabricated bridge deck 2, and cooperate with the assembly gap provided between the mounting hole one and the fixed bolt 5.4 to achieve the purpose of adjusting the relative position between the track 5.1 and the steel pad plate 5.2.

[0083] As shown in Figure 6 , the structure for limiting the lateral displacement of the track unit 5 can also be that both sides of the prefabricated bridge deck 2 are provided with limiting grooves 2.7 on the upper surface and the lower surface, the steel pad plate 5.2 is arranged in the limiting groove 2.7 on the upper surface, and the track 5.1 is arranged in the limiting groove 2.7 on the lower surface, the width of the limiting groove 2.7 on the upper surface is greater than the width of the steel pad plate 5.2 by M millimeters to form an assembly gap, and the width of the limiting groove 2.7 on the lower surface is greater than the width of the track 5.1 by N millimeters to form an assembly gap, wherein the values of N and M are both 2-6 mm.

[0084] Further, the assembly gap allows the steel pad plate 5.2 and the track 5.1 to be adjusted in position in the limiting sink 2.7 respectively, so as to meet the requirement of adjusting the position accuracy of the track 5.1; after the track unit 5 is positioned on the prefabricated bridge deck 2, the assembly gap is filled with material, so as to ensure that the steel pad plate 5.2 and the track 5.1 can be limited in position in the transverse direction.

[0085] The connecting piece 5.3 in the track unit 5 of the embodiment is connected with the track 5.1 and the steel pad plate 5.2 through the fixing bolt 5.4, and the three can be assembled in advance to realize the modularization before being assembled on the prefabricated bridge deck 2, so as to facilitate the assembly and disassembly of the track unit 5 on the prefabricated bridge deck 2; meanwhile, the force on the track 5.1 can be transmitted to the steel pad plate 5.2 through the connecting piece 5.3, and then transmitted to the beam body through the steel pad plate 5.2 to realize the cooperative force bearing, so as to ensure that the track unit 5 will not be subjected to excessive transverse force, and in particular, it can be ensured that the pulling force between the limiting bolt 5.5 and the limiting hole 2.2 will not be too large when the limiting bolt 5.5 and the limiting hole 2.2 are used for transverse limiting.

[0086] As shown in Figure 5 and Figure 6 , the prefabricated bridge deck 2 is provided with an anchoring sink 2.3, the anchoring through hole 2.4 is arranged in the anchoring sink 2.3, the outer surface of the anchoring steel bar is provided with an external thread, and the anchoring steel bar is fastened by an anchoring nut after passing through the anchoring through hole 2.4. Specifically, the anchoring sink 2.3 can ensure that the anchoring steel bar and the anchoring nut will not protrude from the upper surface of the prefabricated bridge deck, so as to ensure the flatness of the upper surface of the prefabricated bridge deck after construction; further, the anchoring sink 2.3 is sealed by a waterproof cover after construction, which can effectively prevent rainwater from entering the anchoring sink 2.3. Preferably, the anchoring sink 2.3 is a four-prism concave groove, which is wide at the top and narrow at the bottom, so as to facilitate demolding and installation of the waterproof cover during manufacturing.

[0087] As shown in Figure 1 , Figure 5 , Figure 6 and Figure 7 , the two adjacent prefabricated bridge decks 2 are each provided with a wet joint pouring groove 2.6 at the end adjacent to the other prefabricated bridge deck 2, the wet joint pouring grooves 2.6 of the two adjacent prefabricated bridge decks 2 are butted to form a wet joint pouring cavity, the bridge deck longitudinal steel bars 2.5 in the prefabricated bridge decks 2 extend into the wet joint pouring cavity, the wet joint pouring cavity is provided with wet joint transverse steel bars 3.1 which overlap the bridge deck longitudinal steel bars 2.5, and the wet joint pouring cavity is filled with concrete to form a wet joint 3.

[0088] Furthermore, the wet joint casting groove 2.6 is located at the center of the end of the precast bridge deck 2. The upper opening of the wet joint casting groove 2.6 is flush with the upper surface of the precast bridge deck 2. The depth of the wet joint casting groove 2.6 is less than the depth of the precast bridge deck 2. In this way, a certain thickness of precast layer can be reserved as the bottom formwork for wet joint casting, realizing formwork-free casting. At the same time, the longitudinal length of the wet joint casting groove 2.6 needs to meet the anchorage length requirements of the reinforcing bars, and the transverse width of the wet joint casting groove 2.6 is less than the transverse width of the precast bridge deck 2 to facilitate the installation of the track unit 5. Preferably, the transverse width of the wet joint casting groove 2.6 is equal to the outer width of the precast composite beam 1.

[0089] Furthermore, the longitudinal steel bars 2.5 of the bridge decks in two adjacent precast bridge decks are staggered in the wet joint casting cavity. After adjustment and positioning, only a small number of transverse steel bars 3.1 of the wet joint need to be tied to meet the strength requirements. The requirements for construction accuracy are extremely low, and the construction is extremely simple. The wet joint 3 is made of UPHC material or expansive concrete. The wet joint 3 makes the adjacent precast bridge decks 2 form a whole, achieving the effect of overall stress.

[0090] In addition, adjacent precast bridge decks 2 can also be connected by connecting steel plates and bolt assemblies, specifically:

[0091] Each of the two adjacent precast bridge decks 2 has a connecting steel plate at the end of the adjacent precast bridge deck 2. The connecting steel plate is fixedly welded to the longitudinal reinforcing bar 2.5 of the bridge deck in the precast bridge deck 2, and the part of the connecting steel plate protruding from the lower surface of the precast bridge deck 2 has a through hole for installation. The connecting steel plates of the two adjacent precast bridge decks 2 are connected by bolt assemblies. An adjustment gap is left between the diameter of the through hole and the bolt in the bolt assembly to meet the lateral position adjustment requirements between the adjacent precast bridge decks.

[0092] See Figure 3 as well as Figures 8 to 10 The precast composite beam 1 includes a composite web, end diaphragms 1.3, and intermediate diaphragms 1.4. Two composite webs are arranged in parallel, and their ends are connected by end diaphragms 1.3. Multiple intermediate diaphragms 1.4 are spaced longitudinally between the two composite webs. The composite web, end diaphragms 1.3, and intermediate diaphragms 1.4 are all provided with anchoring steel bars for connection with the precast bridge deck 2. The end diaphragms 1.3 are used to support the beam on the pier supports.

[0093] Further, the combined web comprises a UHPC web 1.2 and a T-shaped steel beam 1.1 arranged below the UHPC web 1.2; the intermediate cross partition plate 1.4 is arranged between two pieces of UHPC web 1.2, and the two ends of the UHPC web 1.2 and the T-shaped steel beam 1.1 are respectively connected to the end cross partition plates 1.3 at the two ends;

[0094] As shown in Figures 9-10 , the T-shaped steel beam 1.1 comprises a steel bottom plate 1.11 and a steel web 1.10 arranged on the steel bottom plate 1.11, the upper edge of the steel web 1.10 is alternately provided with steel pins 1.9 and mortises 1.8 along the longitudinal direction, the steel pins 1.9 and mortises 1.8 are embedded in the concrete inside the lower end of the UHPC web 1.2, and are arranged in butt joint with the web steel framework in the UHPC web 1.2.

[0095] Specifically, the UHPC web 1.2 comprises a web concrete layer and a web steel framework located in the web concrete layer; the web steel framework comprises upper open stirrups 1.5, lower open stirrups 1.6, web longitudinal steel bars 1.7 and bottom layer longitudinal steel bars 1.12; the upper open stirrups 1.5 and the lower open stirrups 1.6 are alternately arranged along the longitudinal direction, the lower open stirrups 1.6 are arranged one-to-one corresponding to the steel pins 1.9, the steel pins 1.9 are inserted into the openings at the lower end of the lower open stirrups 1.6, and the upper open stirrups 1.5 are arranged one-to-one corresponding to the mortises 1.8, the lower end of the upper open stirrups 1.5 is arranged in the mortises 1.8;

[0096] A plurality of web longitudinal steel bars 1.7 are arranged inside the upper open stirrups 1.5 and the lower open stirrups 1.6 along the vertical direction, and a single web longitudinal steel bar 1.7 passes through the alternately arranged upper open stirrups 1.5 and lower open stirrups 1.6 along the longitudinal direction; further, the two sides of the lower end of each lower open stirrup 1.6 are respectively connected by bottom layer longitudinal steel bars 1.12.

[0097] Among them, the upper end of the upper open stirrup 1.5 protrudes out of the web concrete layer (i.e. protrudes out of the upper surface of the prefabricated composite beam 1), and the lower open stirrup 1.6, the web longitudinal steel bar 1.7 and the bottom layer longitudinal steel bar 1.12 are completely embedded in the web concrete layer.

[0098] Referring to Figure 8 , the end cross partition plate 1.3 and the intermediate cross partition plate 1.4 are both provided with a cross partition plate steel framework, the cross partition plate steel framework is provided with vertical steel bars protruding out of the upper surface of the prefabricated composite beam 1, and the upper open stirrup 1.5 and the part of the vertical steel bars protruding out of the upper surface of the prefabricated composite beam 1 serve as anchoring steel bars and are provided with external threads on the outer surface.

[0099] Specifically, the transverse diaphragm reinforcement in the embodiment includes a plurality of upper opening stirrups 1.5 arranged in a matrix form. The upper ends of the upper opening stirrups 1.5 in the transverse diaphragm reinforcement protrude from the upper surface of the prefabricated composite beam 1 and serve as anchoring steel bars. Of course, the composition of the transverse diaphragm reinforcement is not limited to the embodiment, and persons skilled in the art can flexibly design and adjust the transverse diaphragm reinforcement.

[0100] The anchoring steel bars in the embodiment are the upper opening stirrups of the prefabricated composite beam, which are accurately positioned and formed in the factory. The anchoring steel bars serve as both shear stirrups and connecting screws, thus eliminating the cumbersome process of pre-buried bolts.

[0101] As shown in Figure 11 , Figure 11 The adjustment gap between the anchoring steel bars (i.e., the upper opening stirrups 1.5) and the anchoring through holes 2.4 is shown. Since the hole diameter of the anchoring through hole is larger than the outer diameter of the anchoring steel bar, the adjustment gap allows the prefabricated bridge deck to be adjusted in position relative to the prefabricated composite beam in the horizontal direction. Further, the assembly gap between the mounting hole one and the fixing bolt 5.4 and the assembly gap between the mounting hole two and the limiting bolt 5.5 achieve the same principle of position adjustment.

[0102] Preferably, the prefabricated bridge deck 2 in the embodiment can be made of ordinary concrete (i.e., NC concrete) or ultra-high performance concrete (i.e., UHPC concrete). The end transverse diaphragm 1.3 and the intermediate transverse diaphragm 1.4 are made of UHPC to enhance the overall stress performance of the prefabricated composite beam 1. UHPC has the characteristics of ultra-high strength (compressive strength ≥ 120 MPa), low shrinkage and creep, high durability, etc. The shrinkage and creep of the prefabricated UHPC component are basically completed, which is conducive to ensuring the long-term linear stability of the track beam.

[0103] The prefabricated bridge deck and the prefabricated composite beam in the embodiment have good dimensional accuracy in the factory, which can provide a good accessory base. The installation clamping groove 2.1 can accurately constrain the position of the track unit 5 in the longitudinal direction. The transverse limiting structure of the track unit 5 can achieve position adjustment and limiting of the track unit in the transverse direction, so as to accurately position the single track unit 5 on the prefabricated bridge deck. The installation precision of the beam body is adjusted by the pier support, and the installation precision of the prefabricated bridge deck is adjusted by the adjustment gap between the anchoring steel bar and the anchoring through hole. The scheme of the embodiment can comprehensively realize the geometric precision control of the track in millimeter level, which meets the stringent precision requirements of the maglev transportation system.

[0104] In order to meet the millimeter-level precision requirements of the maglev system, the embodiment further provides a construction method of the beam-track integrated maglev track assembly, which comprises the following steps:

[0105] S1, hoist the prefabricated composite beam 1 to the pier support, and complete the position adjustment of the prefabricated composite beam 1 through the pier support;

[0106] S2, prefabricated bridge deck 2 preassembly, specifically: the prefabricated bridge deck 2 is assembled to the prefabricated composite beam 1 in sequence, the anchoring steel bar in the prefabricated composite beam 1 extends into the anchoring through hole 2.4, and then the anchoring nut is installed on the anchoring steel bar, and the anchoring nut is pre-tightened;

[0107] It should be noted that the pre-tightening of the anchoring nut here cannot affect the positioning adjustment of step S3 and the material filling of step S4; meanwhile, in some embodiments, the anchoring nut may not be installed in step S2, but installed in step S4;

[0108] S3, the position adjustment of all prefabricated bridge decks 2 is carried out by using the adjustment gap between the anchoring steel bar and the anchoring through hole 2.4, and the precise positioning of each prefabricated bridge deck 2 is completed;

[0109] Specifically, in this step, support device groups can be used to support and position the prefabricated bridge deck 2, a plurality of support device groups are arranged on the prefabricated composite beam 1 along the longitudinal direction, and a prefabricated bridge deck 2 is supported by at least two support device groups. A single support device group includes bridge deck support devices symmetrically arranged on two UHPC webs, the bridge deck support device includes a fixing part, an adjusting part and a supporting part, the supporting part is used to push against the bottom surface of the prefabricated bridge deck 2, the fixing part is used to be installed on the UHPC web, the supporting part is arranged on the fixing part through the adjusting part, and the adjusting part can realize the position adjustment of the supporting part in the horizontal direction, longitudinal direction and vertical direction, so as to realize the position adjustment of the prefabricated bridge deck 2 in the horizontal direction, longitudinal direction and vertical direction.

[0110] Of course, in some embodiments, the adjusting part of the bridge deck support device can only realize the position adjustment of the supporting part in the vertical direction, and by applying a horizontal force to the prefabricated bridge deck 2, the position adjustment of the prefabricated bridge deck in the horizontal direction, longitudinal direction and vertical direction can also be achieved.

[0111] S4, material filling is carried out in the gap between the prefabricated composite beam 1 and the prefabricated bridge deck 2 (mainly vertical gap) and the gap between the anchoring steel bar and the anchoring through hole 2.4, and the anchoring nut is tightened when the filling material meets the strength requirement;

[0112] S5, the connection between the two prefabricated bridge decks 2 adjacent in the longitudinal direction is completed, so that the prefabricated bridge decks 2 form a whole;

[0113] The precast bridge deck 2 has been positioned, and the position of the precast bridge deck 2 cannot be changed during the construction of the step; when the connecting steel plate and bolt assembly are used for connection, if there is a gap between the connecting steel plates of the two adjacent precast bridge decks 2 in the longitudinal direction, the gap should be filled with material to eliminate the gap between the precast bridge decks in the longitudinal direction.

[0114] S6, sequentially install each track unit 5, and complete the accurate positioning and fastening of each track unit 5 by using the assembly gap between the components in the track unit 5 and the assembly gap between the track unit 5 and the precast bridge deck 2;

[0115] S7, fill the assembly gap between the track unit 5 and the precast bridge deck 2 and the assembly gap between the components in the track unit with material, and install the motor reaction plate 4 after the filling material meets the strength requirement.

[0116] Further, the assembly gap between the components in step S7 mainly refers to the gap between the mounting hole one and the bolt head of the fixing bolt 5.4, the assembly gap between the track unit and the precast bridge deck 2 refers to the gap between the connecting piece and the mounting clamping groove, and the gap between the bolt head of the limiting bolt 5.5 and the mounting hole two, or the gap between the steel pad plate, the track and the limiting sink respectively. Through material filling, the track unit 5 can be completely limited, the position change of the track unit 5 in the later operation process can be prevented, and the later track line shape can be ensured not to change.

[0117] The embodiment also provides another construction method of the beam track integrated maglev track assembly, the length of the precast bridge deck 2 is an integer multiple of the length of the track unit 5, and the construction method comprises the following steps:

[0118] Q1, install each track unit 5 on the precast bridge deck 2 in the precast factory, and complete the accurate positioning and fastening of each track unit 5 by using the assembly gap between the components in the track unit 5 and the assembly gap between the track unit 5 and the precast bridge deck 2;

[0119] Q2, fill the assembly gap between the track unit 5 and the precast bridge deck 2 and the assembly gap between the components in the track unit with material, and complete the assembly of the track unit 5 after the filling material meets the strength requirement.

[0120] Further, the assembly gap between the components in step Q2 mainly refers to the gap between the mounting hole one and the bolt head of the fixing bolt 5.4, the assembly gap between the track unit and the precast bridge deck 2 refers to the gap between the connecting piece and the mounting clamping groove, and the gap between the bolt head of the limiting bolt 5.5 and the mounting hole two, or the gap between the steel pad plate, the track and the limiting sink respectively. Through material filling, the track unit 5 can be completely limited, the position change of the track unit 5 in the later operation process can be prevented, and the later track line shape can be ensured not to change.

[0121] Q3, the prefabricated composite beam 1 is hoisted to the pier support, and the position adjustment of the prefabricated composite beam 1 is completed through the pier support;

[0122] Q4, the prefabricated bridge deck 2 after the installation of the track unit 5 is sequentially assembled to the prefabricated composite beam 1, the position adjustment of all the prefabricated bridge decks 2 is completed by using the adjustment gap between the anchoring steel bars and the anchoring through holes 2.4, and the accurate positioning of each prefabricated bridge deck 2 is completed; further, the prefabricated bridge deck 2 is supported and positionally adjusted by using the support device group in this step;

[0123] Q5, the material filling is performed in the gap between the prefabricated composite beam 1 and the prefabricated bridge deck 2 (mainly the vertical gap) and the gap between the anchoring steel bars and the anchoring through holes 2.4, and the prefabricated bridge deck 2 is fastened by using the anchoring nut when the filling material meets the strength requirement;

[0124] Q6, the connection between the two prefabricated bridge decks 2 adjacent in the longitudinal direction is completed, so that the prefabricated bridge decks 2 form an integral whole;

[0125] When the step is constructed, the position of the prefabricated bridge deck 2 and the track unit that have completed the positioning cannot be changed; when the connection is performed by using the connecting steel plate and the bolt assembly, if there is a gap in the longitudinal direction between the connecting steel plates of the two prefabricated bridge decks 2 adjacent to each other, the gap should be filled with the material to eliminate the gap between the prefabricated bridge decks in the longitudinal direction.

[0126] Q7, the motor reaction plate 4 is installed.

[0127] The embodiment further provides a third construction method of the beam-rail integrated maglev rail assembly, and the construction method comprises the following steps:

[0128] C1, the prefabricated composite beam 1 that is integrally prefabricated is hoisted to the pier support, and the position adjustment of the prefabricated composite beam 1 is completed through the pier support;

[0129] C2, the prefabricated bridge deck 2 is preassembled, specifically, the prefabricated bridge deck 2 is sequentially assembled to the prefabricated composite beam 1, the anchoring nut is installed on the anchoring steel bar after the anchoring steel bar on the prefabricated composite beam 1 extends into the anchoring through hole 2.4, and the anchoring nut is pre-tightened;

[0130] It should be noted that the pre-tightening of the anchoring nut cannot affect the positioning adjustment in the subsequent step C3 and the material filling in the step C4; meanwhile, in some embodiments, the anchoring nut can not be installed in the step C2, but is installed in the step C4;

[0131] C3, install each track unit 5 in turn, and complete the positioning and pre-tightening of each track unit 5 by using the assembly gap between the components in the track unit 5, the assembly gap between the track unit 5 and the prefabricated bridge deck 2, and the adjustment gap between the anchoring steel bar and the anchoring through hole 2.4;

[0132] Further, the prefabricated bridge deck 2 is supported and adjusted in position by using the support device set in this step. In this step, the positioning of the track unit 5 is achieved by using the assembly gap between the components in the track unit 5, the assembly gap between the track unit 5 and the prefabricated bridge deck 2, and the adjustment gap between the anchoring steel bar and the anchoring through hole 2.4. The assembly gap and the adjustment gap are superimposed in this assembly mode, and the superimposed adjustment gap has a larger adjustment allowance to meet the positioning adjustment requirements of the track unit. The precise positioning of the track unit can be more easily and easily completed.

[0133] Further, the prefabricated bridge deck 2 is supported and adjusted in position by using the support device set in this step. In this step, the positioning of the track unit 5 is achieved by using the assembly gap between the components in the track unit 5, the assembly gap between the track unit 5 and the prefabricated bridge deck 2, and the adjustment gap between the anchoring steel bar and the anchoring through hole 2.4. The assembly gap and the adjustment gap are superimposed in this assembly mode, and the superimposed adjustment gap has a larger adjustment allowance to meet the positioning adjustment requirements of the track unit. The precise positioning of the track unit can be more easily and easily completed.

[0134] C4, fill the gap (mainly vertical gap) between the prefabricated composite beam 1 and the prefabricated bridge deck 2 and the gap between the anchoring steel bar and the anchoring through hole 2.4 with material, and tighten the anchoring nut when the filled material meets the strength requirement;

[0135] C5, complete the connection between the two adjacent prefabricated bridge decks 2 in the longitudinal direction, so that the prefabricated bridge decks 2 form a whole;

[0136] When this step is constructed, the position of the prefabricated bridge deck 2 and the track unit 5 that have been positioned cannot be changed. When the connection is made by using the connecting steel plate and bolt assembly, if there is a gap in the longitudinal direction between the connecting steel plates of the two adjacent prefabricated bridge decks 2, the gap should be filled with material to eliminate the gap between the prefabricated bridge decks in the longitudinal direction.

[0137] C6, check the positioning of each track unit 5 again. If there is a track unit that does not meet the positioning requirements, reposition it by using the assembly gap between the components in the track unit 5 and the assembly gap between the track unit 5 and the prefabricated bridge deck 2. If all the track units 5 meet the positioning requirements, first complete the tightening of each track unit 5, and then fill the assembly gap between the track unit 5 and the prefabricated bridge deck 2 and the assembly gap between the components in the track unit with material. Install the motor reaction plate 4 when the filled material meets the strength requirement.

[0138] Further, the assembly gap between the components in step C6 mainly refers to the gap between the mounting hole one and the bolt head of the fixing bolt 5.4, the assembly gap between the track unit and the prefabricated bridge deck 2 refers to the gap between the connecting piece and the mounting clamping groove, and the gap between the bolt head of the limiting bolt 5.5 and the mounting hole two, or the gap between the steel pad, the track and the limiting groove. The complete limiting track unit 5 can be realized by material filling, which prevents the position change of the track unit 5 in the later operation process and ensures that the track linear form will not change.

[0139] Further, the filling material in the embodiment is mortar or other cementitious material.

[0140] Meanwhile, the embodiment also provides a maintenance and replacement method of the maglev track assembly, including a track unit maintenance and replacement method and a prefabricated bridge deck replacement method:

[0141] 1), the track unit maintenance and replacement method:

[0142] A1, first disassemble the motor reaction plate, then disassemble the connecting relationship between the track unit and the prefabricated bridge deck and the filling material, and disassemble the track unit from the prefabricated bridge deck;

[0143] A2, after checking and processing the assembly interface on the prefabricated bridge deck, reinstalling each track unit, using the assembly gap between the components in the track unit 5 and the assembly gap between the track unit 5 and the prefabricated bridge deck 2 to complete the accurate positioning and fastening of each track unit 5 one by one; wherein the checking and processing of the assembly interface is to remove the remaining filling material on the assembly interface, and when the limiting screw hole 2.2 is used for transverse limiting, the limiting screw hole 2.2 also needs to be rusted and checked for threads;

[0144] A3, fill the material in the assembly gap between the track unit and the prefabricated bridge deck and the assembly gap between the components in the track unit, and install the motor reaction plate 4 after the filling material meets the strength requirement.

[0145] 2), the prefabricated bridge deck replacement method:

[0146] B1, disassemble the motor reaction plate;

[0147] B2, after disassembling the anchor nut in the anchor groove 2.3, disassembling the filling material between the prefabricated composite beam 1 and the prefabricated bridge deck 2 and between the anchoring steel bar and the anchoring through hole 2.4, disassembling the prefabricated bridge deck 2 and the track unit 5 on the prefabricated bridge deck together; when the adjacent prefabricated bridge decks 2 are connected to form a whole through wet joints, each prefabricated bridge deck 2 on a prefabricated composite beam 1 needs to be disassembled together; when the adjacent prefabricated bridge decks 2 are connected through the connecting steel plate and the bolt assembly, only the prefabricated bridge deck to be replaced can be disassembled;

[0148] B3, processing the assembly interface on the prefabricated composite beam 1 and the anchoring steel bars, including removing the remaining filling material of the assembly interface and rust removal and thread inspection of the anchoring steel bars;

[0149] B4, installing a new prefabricated bridge deck 2, adjusting the position of the prefabricated bridge deck 2 by using the adjusting gap between the anchoring steel bars and the anchoring through holes 2.4, and completing the precise positioning of the prefabricated bridge deck 2;

[0150] B5, filling materials in the gap between the prefabricated composite beam 1 and the prefabricated bridge deck 2 and the gap between the anchoring steel bars and the anchoring through holes 2.4, and tightening the anchoring nuts when the filling materials meet the strength requirements;

[0151] B6, completing the connection between the two adjacent prefabricated bridge decks 2 in the longitudinal direction, so that the prefabricated bridge decks 2 form a whole;

[0152] B7, sequentially installing each track unit 5, and completing the precise positioning and tightening of each track unit 5 one by one by using the assembly gap between the components in the track unit 5 and the assembly gap between the track unit 5 and the prefabricated bridge deck 2;

[0153] B8, filling materials in the assembly gap between the track unit and the prefabricated bridge deck and the assembly gap between the components in the track unit, and installing the motor reaction plate 4 when the filling materials meet the strength requirements.

[0154] The above only describes the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A beam-rail integrated maglev rail assembly, characterized in that, The utility model relates to a prefabricated bridge deck system, comprising: a beam body comprising a prefabricated composite beam (1) and a prefabricated bridge deck (2), a plurality of prefabricated bridge decks (2) are sequentially arranged on the prefabricated composite beam (1) in the longitudinal direction, and the adjacent prefabricated bridge decks are fixedly connected; the prefabricated bridge deck (2) is provided with an anchoring through hole (2.4), and the prefabricated composite beam (1) is provided with anchoring steel bars for connecting the prefabricated bridge deck (2); the anchoring steel bars extend into the anchoring through hole (2.4) to realize anchoring connection, and an adjusting gap is left between the anchoring steel bars; a track unit (5), a plurality of track units (5) are sequentially arranged on both sides of the prefabricated bridge deck (2) in the longitudinal direction; the position of the track unit (5) on the prefabricated bridge deck (2) is adjusted through the assembly gap between the components in the track unit (5) and the assembly gap between the track unit (5) and the prefabricated bridge deck (2); a motor reaction plate (4), the beam body is provided with a motor reaction plate (4) on both sides in the longitudinal direction, and the motor reaction plate (4) is arranged on the plurality of track units (5) on the side; the track unit (5) comprises a track (5.1), a steel base plate (5.2), a connecting piece (5.3) and a fixing bolt (5.4), installation clamping grooves (2.1) are arranged on both sides of the prefabricated bridge deck (2) in the longitudinal direction at intervals, the track (5.1) is arranged on the lower surface of the prefabricated bridge deck (2), the steel base plate (5.2) is arranged on the upper surface of the prefabricated bridge deck (2), and the motor reaction plate (4) is arranged on the steel base plate (5.2), the connecting piece (5.3) is clamped in the installation clamping groove (2.1), and threaded holes are arranged on the upper side and the lower side of the connecting piece (5.3), installation holes one are arranged on the track (5.1) and the steel base plate (5.2), the track (5.1) and the lower side of the connecting piece (5.3) are connected through the fixing bolt (5.4), and the upper side of the steel base plate (5.2) and the connecting piece (5.3) are connected through the fixing bolt (5.4), and an assembly gap is left between the installation hole one and the fixing bolt (5.4).

2. The beam-rail integrated maglev rail assembly of claim 1, wherein, installation holes two are arranged on the steel base plate (5.2) and the track (5.1), limit screw holes (2.2) are arranged on the prefabricated bridge deck (2), the steel base plate (5.2) and the prefabricated bridge deck (2) are connected through the limit bolt (5.5), and the track (5.1) and the prefabricated bridge deck (2) are connected through the limit bolt (5.5), and an assembly gap is left between the installation hole two and the limit bolt (5.5).

3. The beam-rail integrated maglev rail assembly of claim 1, wherein, limitation grooves (2.7) are arranged on the upper surface and the lower surface of both sides of the prefabricated bridge deck (2), the steel base plate (5.2) is arranged in the limitation groove (2.7) on the upper surface, and the track (5.1) is arranged in the limitation groove (2.7) on the lower surface; the width of the limitation groove (2.7) on the upper surface is greater than the width of the steel base plate (5.2) by M millimeters to form an assembly gap, and the width of the limitation groove (2.7) on the lower surface is greater than the width of the track (5.1) by N millimeters to form an assembly gap.

4. The beam and rail integrated maglev rail assembly of claim 1, wherein, The prefabricated bridge deck slab (2) is provided with an anchoring groove (2.3), the anchoring through hole (2.4) is arranged in the anchoring groove (2.3), the outer surface of the anchoring steel bar is provided with an external thread, and the anchoring steel bar is fastened by an anchoring nut after penetrating through the anchoring through hole (2.4).

5. The beam-rail integrated maglev track assembly according to any one of claims 1-4, wherein, The prefabricated composite beam (1) comprises a composite web, an end diaphragm (1.3) and an intermediate diaphragm (1.4), two composite webs are arranged in parallel, the end diaphragm (1.3) is connected between the ends of the two composite webs, and a plurality of intermediate diaphragms (1.4) are arranged in the longitudinal direction between the two composite webs; the composite web, the end diaphragm (1.3) and the intermediate diaphragm (1.4) are all provided with anchoring steel bars for connecting with the prefabricated bridge deck slab (2); The composite web comprises a UHPC web (1.2) and a T-shaped steel beam (1.1) arranged below the UHPC web (1.2); The T-shaped steel beam (1.1) comprises a steel bottom plate (1.11) and a steel web (1.10) arranged on the steel bottom plate (1.11); the upper edge of the steel web (1.10) is alternately provided with a steel pin (1.9) and a mortise (1.8) in the longitudinal direction; the steel pin (1.9) and the mortise (1.8) are embedded in the concrete inside the lower end of the UHPC web (1.2) and are arranged in butt joint with the web steel framework in the UHPC web (1.2).

6. The beam and rail integrated maglev rail assembly of claim 5, wherein, The UHPC web (1.2) comprises a web concrete layer and a web steel framework arranged in the web concrete layer; The web steel framework comprises an upper open stirrup (1.5), a lower open stirrup (1.6), a web longitudinal steel bar (1.7) and a bottom layer longitudinal steel bar (1.12); the upper open stirrup (1.5) and the lower open stirrup (1.6) are alternately arranged in the longitudinal direction; the lower open stirrup (1.6) is arranged in one-to-one correspondence with the steel pin (1.9); the steel pin (1.9) is inserted into the opening at the lower end of the lower open stirrup (1.6); the upper open stirrup (1.5) is arranged in one-to-one correspondence with the mortise (1.8); the lower end of the upper open stirrup (1.5) is arranged in the mortise (1.8); A plurality of web longitudinal steel bars (1.7) are arranged in the vertical direction inside the upper open stirrup (1.5) and the lower open stirrup (1.6); a single web longitudinal steel bar (1.7) penetrates through the alternately arranged upper open stirrup (1.5) and lower open stirrup (1.6) in the longitudinal direction; The two sides of the lower end of each lower open stirrup (1.6) are respectively connected by a bottom layer longitudinal steel bar (1.12).

7. The beam and rail integrated maglev rail assembly of claim 6, wherein, The upper end of the upper open stirrup (1.5) protrudes from the upper surface of the prefabricated composite beam (1); the end diaphragm (1.3) and the intermediate diaphragm (1.4) are both provided with a diaphragm steel framework; the diaphragm steel framework is provided with a vertical steel bar protruding from the upper surface of the prefabricated composite beam (1); the upper open stirrup (1.5) and the part of the vertical steel bar protruding from the upper surface of the prefabricated composite beam (1) serve as anchoring steel bars and are provided with external threads on the outer surfaces.

8. A method of constructing a beam-rail integrated maglev track assembly as claimed in any one of claims 1 to 7, wherein, Comprise: S1, the whole prefabricated prefabricated composite beam (1) is hoisted to the pier support, and the position adjustment of the prefabricated composite beam (1) is completed through the pier support; S2, prefabricated bridge deck (2) preassembly, specifically: the prefabricated bridge deck (2) is assembled to the prefabricated composite beam (1) in turn, the anchoring steel bar in the anchoring through hole (2.4) is inserted into the anchoring steel bar, and the anchoring nut is installed on the anchoring steel bar, and the anchoring nut is pre-tightened; S3, the adjustment gap between the anchoring steel bar and the anchoring through hole (2.4) is used to adjust the position of all prefabricated bridge deck (2), and the precise positioning of each prefabricated bridge deck (2) is completed; S4, material filling is carried out in the gap between the prefabricated composite beam (1) and the prefabricated bridge deck (2) and the gap between the anchoring steel bar and the anchoring through hole (2.4), and the anchoring nut is tightened when the filling material meets the strength requirement; S5, the connection between the two prefabricated bridge deck (2) in the longitudinal direction is completed, so that the prefabricated bridge deck (2) forms a whole; S6, each track unit (5) is installed in turn, and the precise positioning and fastening of each track unit (5) are completed by using the assembly gap between the components in the track unit (5) and the assembly gap between the track unit (5) and the prefabricated bridge deck (2); S7, the assembly gap between the track unit (5) and the prefabricated bridge deck (2) and the assembly gap between the components in the track unit are filled with material, and the motor reaction plate (4) is installed when the filling material meets the strength requirement.

9. A method of constructing a beam-rail integrated maglev track assembly as claimed in any one of claims 1 to 7, characterised by, The length of the prefabricated bridge deck (2) is an integer multiple of the length of the track unit (5), and the construction method comprises: Q1, install each track unit (5) on the prefabricated bridge deck (2) in the prefabricated factory, and complete the precise positioning and fastening of each track unit (5) by using the assembly gap between the components in the track unit (5) and the assembly gap between the track unit (5) and the prefabricated bridge deck (2); Q2, the assembly gap between the track unit (5) and the prefabricated bridge deck (2) and the assembly gap between the components in the track unit are filled with material, and the track unit (5) is assembled when the filling material meets the strength requirement; Q3, the whole prefabricated prefabricated composite beam (1) is hoisted to the pier support, and the position adjustment of the prefabricated composite beam (1) is completed through the pier support; Q4, the prefabricated bridge deck (2) after installing the track unit (5) is assembled to the prefabricated composite beam (1) in turn, and the precise positioning of each prefabricated bridge deck (2) is completed by using the adjustment gap between the anchoring steel bar and the anchoring through hole (2.4); Q5, material filling is carried out in the gap between the prefabricated composite beam (1) and the prefabricated bridge deck (2) and the gap between the anchoring steel bar and the anchoring through hole (2.4), and the prefabricated bridge deck (2) is fastened by using the anchoring nut when the filling material meets the strength requirement; Q6, the connection between the two prefabricated bridge deck (2) in the longitudinal direction is completed, so that the prefabricated bridge deck (2) forms a whole; Q7, install the motor reaction plate (4).

10. A method of constructing a beam-rail integrated maglev track assembly as claimed in any one of claims 1 to 7, wherein, It comprises: C1, hoist the prefabricated composite beam (1) to the pier support, and adjust the position of the prefabricated composite beam (1) through the pier support; C2, prefabricated bridge deck (2) preassembly, specifically: the prefabricated bridge deck (2) is assembled to the prefabricated composite beam (1) in turn, the anchoring steel bar in the prefabricated composite beam (1) extends into the anchoring through hole (2.4), and the anchoring nut is installed on the anchoring steel bar, and the anchoring nut is pre-tightened; C3, install each track unit (5) in turn, use the assembly gap between the components in the track unit (5), the assembly gap between the track unit (5) and the prefabricated bridge deck (2), and the adjustment gap between the anchoring steel bar and the anchoring through hole (2.4) to complete the positioning and pre-tightening of each track unit (5) one by one; C4, fill the gap between the prefabricated composite beam (1) and the prefabricated bridge deck (2) and the gap between the anchoring steel bar and the anchoring through hole (2.4) with material, and tighten the anchoring nut when the filling material meets the strength requirement; C5, complete the connection between the two prefabricated bridge decks (2) adjacent in the longitudinal direction, so that the prefabricated bridge decks (2) form a whole; C6, check the positioning of each track unit (5) again, if there is a track unit that does not meet the positioning requirements, use the assembly gap between the components in the track unit (5) and the assembly gap between the track unit (5) and the prefabricated bridge deck (2) to reposition, if all the track units (5) meet the positioning requirements, first tighten each track unit (5), then fill the assembly gap between the track unit (5) and the prefabricated bridge deck (2) and the assembly gap between the components in the track unit with material, and install the motor reaction plate (4) when the filling material meets the strength requirement.

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