Prefabricated functional panel for magnetic levitation transportation, slab girder structure and construction method

Abstract

The embodiment of the application provides a prefabricated functional panel of magnetic levitation transportation, a plate beam structure and a construction method. The prefabricated functional panel of the magnetic levitation transportation comprises a plate body, which is prefabricated as a concrete component; a truss, which is configured as a reinforcing component, is connected to two plate bodies arranged at intervals, two ends of the truss are embedded in the corresponding plate bodies, and at least two trusses are arranged at intervals along the longitudinal direction of the plate body; and a functional component is arranged on each plate body to provide a magnetic levitation function. By prefabricating the functional component on the plate body and connecting the two plate bodies arranged at intervals by the truss, the prefabricated functional panel can be produced modularly; the prefabrication of the functional component ensures the manufacturing precision and installation quality and reduces the problems of inaccurate positioning and low precision in on-site construction and installation.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of bridge engineering, and particularly relates to a prefabricated functional panel for magnetic levitation transportation, a plate girder structure and a construction method. BACKGROUND

[0002] The current development of the normal magnetic levitation train is to keep the vertical suspension through the interaction of the electromagnet on the train suspension frame and the long stator coil on the track, and to keep the horizontal gap through the attraction force of the side electromagnet on the suspension frame and the side guide surface of the track.

[0003] The existing magnetic levitation transportation usually adopts an overhead type, and the bridge adopts a monolithic or composite track beam, the top of which is connected with a functional part for installing the stator of the linear motor and other electrical components. Since the magnetic levitation train has a high running speed and a small suspension gap, high installation precision of the top of the track beam and the functional part is required. In the traditional track beam structure, the functional part is directly installed on the top of the bridge, and the manufacturing precision of the bridge has a great influence on the functional part, so the entire track beam (generally 25-30 meters long) needs to be placed on a precision machine tool under constant temperature conditions for processing, which poses great challenges to the installation and positioning of the track beam. SUMMARY

[0004] Therefore, the embodiments of the application provide a prefabricated functional panel for magnetic levitation transportation, a plate girder structure and a construction method to solve the technical problem of low installation precision of the magnetic levitation functional part and non-modularization.

[0005] To solve the above technical problems, the technical scheme of the embodiments of the application is as follows:

[0006] In a first aspect, the embodiments of the application provide a prefabricated functional panel for magnetic levitation transportation, comprising:

[0007] a plate body, which is prefabricated as a concrete member; a truss, which is configured as a reinforcing member and is connected to two plate bodies arranged at a relative interval, two ends of the truss are respectively embedded in the corresponding plate body, at least part of the two ends of the truss is located outside the plate body, and at least two trusses are arranged at a longitudinal interval along the plate body; and a functional part, which is arranged on the two plate bodies respectively to provide magnetic levitation function.

[0008] Further, the plate body comprises: longitudinal beams, the two longitudinal beams are arranged at a relative interval, and the functional part is arranged on the two longitudinal beams respectively; and bosses, which are arranged at a longitudinal interval along the longitudinal beams, the bosses are integrally prefabricated with the longitudinal beams, two bosses corresponding to the two longitudinal beams are arranged at an interval, and the two ends of the truss are respectively embedded in the corresponding bosses.

[0009] Further, a threaded hole for adjusting and positioning is formed on the boss.

[0010] The second aspect of the embodiments of the present application further provides a slab girder structure of magnetic levitation transportation, comprising:

[0011] a carrier; a prefabricated functional panel as described above arranged on the carrier, at least part of the area above the carrier between the two panel bodies forming a post-cast strip, the truss arranged at the part of the panel body outside the post-cast strip; and a grouting body cast in the post-cast strip to connect the prefabricated functional panel and the carrier.

[0012] Further, the slab girder structure further comprises an adjusting member arranged between the carrier and the prefabricated functional panel and configured to adjust and position the prefabricated functional panel.

[0013] Further, the adjusting member is an adjusting screw, the panel body is formed with a threaded hole matched with the adjusting screw, one end of the adjusting screw is arranged in the threaded hole, and the other end of the adjusting screw is in abutment or screw connection with the carrier.

[0014] Further, the panel body comprises longitudinal beams and bosses, the two longitudinal beams are arranged in opposite spaced relationship, and the functional members are arranged on the two longitudinal beams respectively; the bosses are arranged in spaced relationship along the longitudinal direction of the longitudinal beams, the bosses are integrally prefabricated with the longitudinal beams, the corresponding two bosses on the two longitudinal beams are arranged in spaced relationship, the two ends of the truss are embedded in the corresponding bosses respectively, and the bosses are arranged on the carrier.

[0015] The post-cast strip is formed between the two bosses arranged in opposite relationship, the grouting body is connected with the two bosses arranged in opposite relationship to form a cross beam, and the two adjacent cross beams are arranged in spaced relationship; or, the post-cast strip is formed in the area above the carrier between the two longitudinal beams, the grouting body connects the two bosses adjacent in the longitudinal direction of the longitudinal beam, and the grouting body is arranged in spaced relationship with the longitudinal beam.

[0016] Further, the carrier has exposed embedded reinforcement, and the exposed end of the embedded reinforcement is arranged in the truss.

[0017] Further, the longitudinal length of the prefabricated functional panel is modularized, and the length of the carrier is an integer multiple of the length of the prefabricated functional panel.

[0018] The third aspect of the embodiments of the present application further provides a construction method of a slab girder structure of magnetic levitation transportation, applied to the slab girder structure described above, and the construction method comprises: hoisting the prefabricated functional panel onto the carrier; adjusting and positioning the prefabricated functional panel; and casting the grouting body to connect the prefabricated functional panel and the carrier.

[0019] The prefabricated functional panel of the magnetic levitation transportation provided by the embodiment of the application is capable of modular production by prefabricating the functional components on the plate body, and utilizing the truss to connect the two plate bodies arranged at intervals, so that the prefabricated functional panel can be modularly produced. The prefabrication of the functional components ensures the manufacturing precision and installation quality, and reduces the problems of inaccurate positioning and low precision in the on-site construction and installation. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the application, the drawings needed to be used in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description only constitute some embodiments of the application, and other drawings can also be obtained by those skilled in the art without creative effort on the basis of these drawings.

[0021] Figure 1 is a schematic diagram of a plate girder structure of the application;

[0022] Figure 2 is a schematic diagram of a prefabricated functional panel of the first embodiment of the application, wherein the functional components are not shown, and a first case of pouring the grouting body in the post-poured belt is shown;

[0023] Figure 3 is a schematic diagram of a prefabricated functional panel of the second embodiment of the application, wherein the functional components are not shown, and a second case of pouring the grouting body in the post-poured belt is shown;

[0024] Figure 4 is a flowchart of a construction method of a plate girder structure of the magnetic levitation transportation of the application.

[0025] Explanation of reference signs:

[0026] 1, bearing body, 2, prefabricated functional panel, 3, grouting body, 4, adjusting component, 5, post-poured belt;

[0027] 11, embedded bar, 21, plate body, 22, truss, 23, functional component;

[0028] 211, longitudinal beam, 212, boss, 213, threaded hole, 231, levitation component, 232, lateral limiting component, 233, sliding surface. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the application more clear, the application will be further described in detail in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the application, and are not used to limit the application.

[0030] In the specific embodiments described in the various technical features, any suitable manner can be combined without contradiction, for example, different embodiments and technical solutions can be formed by combining different technical features. In order to avoid unnecessary repetition, various possible combinations of various technical features in this application are not described again.

[0031] In the following description, the orientation description "transverse" and "longitudinal" are the orientations in the normal state.

[0032] In addition, in the embodiments of the present application, the description of the word "relative" is to face each other, and "relative" throughout the text means the same.

[0033] As shown in Figure 1 The plate girder structure of the magnetic levitation transportation provided by the embodiments of the present application includes a carrier 1, a prefabricated functional panel 2 and a grouting body 3. The prefabricated functional panel 2 includes a plate body 21, a truss 22 and a functional part 23. The plate body 21 is prefabricated as a concrete member, for example, a reinforced concrete structure; the truss 22 is configured as a reinforcing member, for example, a steel truss, the truss 22 connects two plate bodies 21 arranged at a relative interval, and the functional part 23 is arranged on the two plate bodies 21 respectively to provide magnetic levitation function. The prefabricated functional panel 2 is arranged on the carrier 1, at least part of the area above the carrier 1 between the two plate bodies 21 forms a post-cast strip 5, the truss 22 arranged at the position outside the plate body 21 is arranged in the post-cast strip 5, and the grouting body 3 is poured in the post-cast strip 5 to connect the prefabricated functional panel 2 and the carrier 1.

[0034] The plate girder structure of the magnetic levitation transportation of the present application serves as a load-bearing member and a running member of the magnetic levitation train, on the one hand, to transfer and bear the load transferred by the functional part, and on the other hand, as a running surface to provide vertical support in the case of slow train, parking and emergency.

[0035] Specifically, the plate body 21 in the prefabricated functional panel 2 is prefabricated as a concrete member, the use of concrete can reduce the steel consumption of the prefabricated functional panel 2, improve the economy, and reduce the maintenance and repair cost and workload. The truss 22 is a reinforcing member such as a steel truss, which has large stiffness, light weight and strong durability, and is suitable for large-span and large-load environment. The two plate bodies 21 arranged at a relative interval are connected by the truss 22, which is conducive to the laying and installation of the prefabricated functional panel 2 in the plate girder structure of the magnetic levitation transportation. In the plate girder structure, the grouting body 3 can use concrete materials with good fluidity, fast strength development and excellent mechanical properties, such as UHPC ultra-high performance concrete and epoxy mortar. Pouring the grouting body 3 in the post-cast strip 5 makes the truss 22 and the carrier 1 fixedly connected, i.e., the prefabricated functional panel 2 and the carrier 1 are fixedly connected.

[0036] Further, the two ends of the truss 22 are embedded in the corresponding plate body 21 respectively, at least part of the two ends of the truss 22 is located outside the plate body 21, the truss 22 is connected between the two plate bodies 21, which strengthens the connection between the two plate bodies 21 and the truss 22 and supports the two plate bodies 21.

[0037] Further, at least two trusses 22 are arranged longitudinally and spaced apart on the plate body 21, and the multiple trusses 22 can ensure that the prefabricated functional panel 2 is light and has improved strength and rigidity.

[0038] The functional part 23 specifically includes a levitation component 231, a lateral limiting component 232 and a sliding surface 233; the levitation component 231 is arranged on the bottom surface of the end of the plate body 21, which provides levitation force and traction for the maglev vehicle; the lateral limiting component 232 is arranged on the side surface of the end of the plate body 21, which provides braking or limiting for the maglev vehicle; and the sliding surface 233 is arranged on the top surface of the end of the plate body 21, which is used for sliding of the maglev vehicle. The functional part 23 for maglev is prefabricated on the plate body 21, which ensures manufacturing precision and installation quality, and reduces the problem of inaccurate positioning and low precision of the functional part 23 in site construction and installation.

[0039] The prefabricated functional panel of the embodiment of the application can be modularly produced by prefabricating the functional part 23 on the plate body 21 and connecting the two plate bodies 21 arranged at intervals by the truss 22, which ensures manufacturing quality, facilitates erection of the slab girder structure of the maglev transportation and reduces engineering quantity.

[0040] The slab girder structure of the maglev transportation of the embodiment of the application can directly erect the prefabricated functional panel 2 on the bearing body 1, and cast and grout the grouting body 3 in the post-cast strip 5 to fixedly connect the prefabricated functional panel 2 and the bearing body 1, so as to form an integral structure to jointly bear the load of the maglev train, which is convenient for construction.

[0041] The bearing body 1 can be a bridge structure of an elevated section, such as a small box girder, an integral box girder, a large-span bridge and the like, the prefabricated functional panel is arranged on the upper part of the bridge structure to form a beam-on-beam structure and form reliable connection; or the bearing body 1 can be a tunnel structure, the prefabricated functional panel 2 is arranged on the bottom plate of the tunnel lining; or the bearing body 1 can be a low-lying structure, which is used for a section with low line elevation, and the prefabricated functional panel 2 is arranged on the low-lying structure.

[0042] In an embodiment, the slab girder structure further includes an adjusting part arranged between the bearing body 1 and the prefabricated functional panel 2 and configured to adjust and position the prefabricated functional panel. The slab girder structure of the maglev transportation needs to adjust the elevation according to the erection requirement in erection, and the adjusting part arranged between the bearing body 1 and the prefabricated functional panel 2 is used for high-precision adjustment to meet the high-precision adjustment requirement of the high-speed maglev.

[0043] Specifically, the adjusting component is an adjusting screw 4, and a threaded hole 213 adapted to the adjusting screw 4 is formed on the plate 21. One end of the adjusting screw 4 is set in the threaded hole 213, and the other end of the adjusting screw 4 abuts or is screwed to the carrier 1.

[0044] The plate 21 can be a longitudinal beam structure without bosses, with two plate beams spaced apart from each other, and the two ends of the truss 22 are respectively embedded in the corresponding plate 21. In this embodiment, the plate 21 is as follows: Figure 2 As shown, the structure includes longitudinal beams 211 and bosses 212. Two longitudinal beams 211 are spaced apart, and functional components 23 are respectively mounted on the two longitudinal beams 211. Bosses 212 are spaced apart along the longitudinal direction of the longitudinal beams 211. Bosses 212 are prefabricated integrally with the longitudinal beams 211, and two corresponding bosses 212 are spaced apart on the two longitudinal beams 211. Both ends of the truss 22 are pre-embedded in the corresponding bosses 212. The presence of bosses 212 ensures the prefabricated functional panel 2 is firmly and stably positioned in the transverse direction of the truss 22, thus improving the load-bearing capacity of the prefabricated functional panel 2. Therefore, threaded holes 213 can be provided on either the bosses 212 or the longitudinal beams 211.

[0045] In one embodiment, such as Figures 1 to 3 As shown, a boss 212 is provided on the support body 1, and threaded holes 213 for adjustment and positioning are formed thereon. Multiple threaded holes 213 can be pre-set on the boss 212 according to construction needs, and adjusting screws 4 are installed in each of the multiple threaded holes. Each boss 212 has at least one threaded hole 213 pre-set, thus the evenly distributed adjusting screws 4 ensure balanced force on the panel 21. When the longitudinal beam 211 is partially erected on the support body 1 and has sufficient longitudinal length, the threaded holes 213 are pre-set on the longitudinal beam 211, and the adjusting screws 4 are arranged along the longitudinal beam 211. Multiple adjusting screws 4 evenly distributed along the longitudinal beam 211 can prevent large deformation of the prefabricated functional panel 2. In actual construction, the specific positions of the threaded holes 213 need to be determined according to the structural dimensions of the support body 1, the boss 212, and the longitudinal beam 211. Pre-fabricating the threaded holes in the factory facilitates height adjustment of the prefabricated functional panel during on-site construction using bolts or screws.

[0046] Corresponding to slab-beam structures, such as Figure 1 As shown, the adjusting screw 4 is disposed in the threaded hole 213 on the boss 212. When one end of the adjusting screw 4 is disposed in the threaded hole 213 and the other end abuts against the support body 1, there is a gap between the prefabricated functional panel 2 and the support body 1. A post-pouring strip 5 can be formed between the prefabricated functional panel 2 and the support body 1 and is poured by the grouting body 3 to further fix the prefabricated functional panel 2 and the support body 1. When one end of the adjusting screw 4 is disposed in the threaded hole 213 and the other end of the adjusting screw 4 is screwed to the support body 1, the prefabricated functional panel 2 and the support body 1 are tightly connected.

[0047] The adjusting screw 4 of the embodiment plays a temporary supporting role in the plate girder structure installation process. Before the prefabricated functional panel 2 and the load-bearing beam body 1 are not tightly connected, the adjusting screw 4 supports the prefabricated functional panel 2 as a fulcrum. The adjusting screw 4 also serves as an adjusting part and plays a positioning height role. By rotating one end of the adjusting screw 4, the length of the other end of the adjusting screw 4 is adjusted to adjust the elevation of the concrete functional panel body 1. The multi-point adjustment of the adjusting screw 4 makes the prefabricated functional panel 2 accurately positioned and effectively controls the elevation and linear shape to meet the high-precision requirements of the maglev train.

[0048] As shown in Figure 2 , the post-cast strip 5 of the plate girder structure is formed between the two oppositely arranged bosses 212. The grouting body 3 is connected with the two oppositely arranged bosses 212 to form a cross beam, and the two adjacent cross beams are arranged at intervals.

[0049] Specifically, the two ends of the truss 22 are embedded in the corresponding bosses 212. The part of the truss 22 located outside the plate body 21 is arranged in the post-cast strip 5. The grouting body 3 is poured into the post-cast strip 5 to form a cross beam with truss stiffening. The prefabricated functional panel 2 and the load-bearing body 1 are reliably connected, and the post-cast strip 5 plays a role of supporting the longitudinal beam 211 and transferring load during operation.

[0050] In an embodiment, as shown in Figure 3 , the post-cast strip 5 is also formed in the area above the load-bearing body 1 between the two longitudinal beams 211. The grouting body 1 connects the two bosses 212 longitudinally adjacent along the longitudinal beam 211, and the grouting body 1 is arranged at intervals with the longitudinal beam 211.

[0051] Specifically, to improve the load-carrying capacity and stiffness of the plate girder structure, the post-cast strip area of the prefabricated functional panel 2 and the load-bearing body 1 can be increased. After the prefabricated functional panel 2 is erected and adjusted, the post-cast strip 5 is formed in the area above the load-bearing body 1 between the two longitudinal beams 211, and the grouting body 3 is poured. The pouring thickness of the grouting body 3 can be consistent with that of the cross beam, so that the load-bearing body 1 is continuously connected above. The grouting body 3 can be arranged at intervals with the longitudinal beam 211, or can connect the two opposite longitudinal beams 211.

[0052] In an embodiment, the load-bearing body 1 has an exposed embedded bar 11. The exposed end of the embedded bar 11 is arranged in the truss 22. The exposed embedded bar 11 is poured into the post-cast strip 5 together with the grouting body 3 to form a cross beam, thereby improving the reliability of the plate girder structure.

[0053] Further, the exposed end of the embedded bar 11 is arranged in the area above the load-bearing body 1 between the two longitudinal beams 211. The exposed embedded bar 11 is poured into the post-cast strip 5 together with the grouting body 3, thereby further improving the reliability of the plate girder structure.

[0054] The prefabricated functional panel 2 is laid on the carrier 1, and the longitudinal length of the prefabricated functional panel 2 is modularized to facilitate factory standardization prefabrication, and the length of the carrier 1 is an integer multiple of the length of the prefabricated functional panel 2.

[0055] Specifically, the transverse size of the prefabricated functional panel 2 is affected by vehicle construction and building limits, and the longitudinal length can be a smaller size such as about 3 m or about 6 m, which ensures manufacturing quality and is more convenient for transportation and installation. At the same time, the carrier 1 (track beam, tunnel, low structure) connected thereto is in an integer multiple relationship, for example, a 6 m long panel beam structure can be used for a 30 m long track beam, a 12 m long low structure, etc., so that it has wide applicability.

[0056] During the laying process of the panel beam structure, adjacent prefabricated functional panels can be connected according to the installation position, and the adjacent prefabricated functional panels can be connected to enhance the overall integrity of the structure; or can be kept in a disconnected state, and a single prefabricated functional panel is independently stressed.

[0057] The third aspect of the embodiment of the application provides a construction method of a panel beam structure of a magnetic levitation transportation, applied to the panel beam structure described above, such as Figure 4 , the construction method comprises:

[0058] S1: hoisting the prefabricated functional panel to the carrier;

[0059] S2: adjusting and positioning the prefabricated functional panel;

[0060] S3: pouring the grouting body to connect the prefabricated functional panel and the carrier.

[0061] Specifically, the prefabricated functional panel is accurately positioned by the adjusting piece in step S2, and the elevation and linearity are controlled to meet the high-precision requirements of the magnetic levitation train. In step S3, the grouting body is poured to connect the prefabricated functional panel and the carrier according to the position of the post-cast strip, so as to ensure reliable connection.

[0062] The application uses the prefabricated functional panel to make the on-site construction simple, the height adjustment convenient, and the positioning accurate, thereby ensuring the construction quality.

[0063] The above only describes the preferred embodiments of the application and is not intended to limit the application, and any modifications, equivalent replacements and improvements made within the spirit and principle of the application shall be included in the protection scope of the application.

Claims

1. A prefabricated functional panel for magnetic levitation transport, characterized in that, The plate body is prefabricated as a concrete component. The truss is configured to reinforce the component and is connected to two plate bodies arranged at a distance from each other, two ends of the truss are embedded in the corresponding plate bodies, at least part of the truss between the two ends is located outside the plate bodies, and at least two trusses are arranged at a distance along the longitudinal direction of the plate body. The functional part is arranged on the two plate bodies to provide magnetic levitation function. The plate body comprises: The longitudinal beam is arranged opposite to each other along the transverse direction of the plate body, and the functional part is arranged on the two longitudinal beams. The boss is arranged at a distance along the longitudinal direction of the longitudinal beam on one side of the two longitudinal beams close to each other, the boss is prefabricated integrally with the longitudinal beam, two bosses corresponding to the two longitudinal beams are arranged at a distance, and the two ends of the truss are embedded in the corresponding boss. The boss is formed with a threaded hole for adjusting the position. The plate beam structure comprises: The bearing body; 2. The pre-fabricated functional panel of claim 1, wherein, The prefabricated functional panel of claim 1 is arranged on the bearing body, at least part of the area between the two plate bodies above the bearing body forms a post-cast strip, and the part of the truss located outside the plate body is arranged in the post-cast strip.

3. A plate girder structure of a magnetic levitation transportation system, characterized by The grouting body is poured into the post-cast strip to connect the prefabricated functional panel and the bearing body. The plate beam structure further comprises: The adjusting part is arranged between the bearing body and the prefabricated functional panel and is configured to adjust the position of the prefabricated functional panel. The adjusting part is an adjusting screw, the plate body is formed with a threaded hole matched with the adjusting screw, one end of the adjusting screw is arranged in the threaded hole, and the other end of the adjusting screw is in abutment or screw connection with the bearing body. The boss is arranged on the bearing body; 4. The plate girder structure according to claim 3, characterized in that The post-cast strip is formed between the two bosses arranged opposite to each other, the grouting body is connected with the two bosses arranged opposite to each other to form a cross beam, and the two adjacent cross beams are arranged at a distance; or, the post-cast strip is formed in the area between the two longitudinal beams above the bearing body, the grouting body connects the two bosses adjacent to each other along the longitudinal direction of the longitudinal beam, and the grouting body is arranged at a distance from the longitudinal beam. The bearing body has an exposed embedded bar, and the exposed end of the embedded bar penetrates the truss.

5. The plate girder structure according to claim 4, characterized in that The longitudinal length of the prefabricated functional panel is modular, and the length of the bearing body is an integer multiple of the length of the prefabricated functional panel.

6. The plate girder structure according to claim 3, characterized in that The construction method is applied to the plate beam structure of any one of claims 3-8, and the construction method comprises: Hoisting the prefabricated functional panel onto the bearing body; 7. A plate girder structure according to any one of claims 3-6, c h a r a c t e r i s e d in that Adjusting the position of the prefabricated functional panel; 8. A plate girder structure according to any one of claims 3-6, characterized in that Pouring the grouting body to connect the prefabricated functional panel and the bearing body.

9. A construction method of a deck girder structure of a magnetic levitation transportation system, characterized by, ​ ​ ​ ​

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