A double-track girder support system and construction method applicable to suspended monorails

Abstract

The present invention provides a double-track girder support system applicable to a suspended monorail, which includes double-track girders arranged side by side in two lines. A pier and a cross beam are provided between the two-track girders and at the ends of the track girders. A pier top cover beam is provided on the top of the pier. The bottom of the cross beam is supported on the pier top cover beam of the pier through a bearing, and the two ends of the cross beam are respectively connected to the sides of the two-track girders to form an integral body. In addition, the present invention also provides a construction method for the double-track girder support system. On the premise of meeting the vehicle driving requirements, the double-track girders are connected into an integral body through the cross beam, converted from the conventional single-track girders to double-track girders, and the pier top cover beam is placed between the two track girders, effectively reducing the height of the pier, improving the structural stress and stability of the track girders and the piers. At the same time, the utilization of the materials of the track girders and the piers is more sufficient, the steel consumption can be greatly saved, the construction is simple, the later maintenance is convenient, and the economic and technical benefits are obvious.

Description

Technical Field

[0001] The invention belongs to the technical field of suspended monorails, and particularly relates to a double-track beam support system applicable to suspended monorails and a construction method thereof. Background Art

[0002] Currently, the commonly used support systems for suspended monorails mainly include the pin type and the support type.

[0003] In the pin-type support system, in the double-track bridge section, T-shaped piers are used to suspend the track beams on both sides of the pier capping beam through hanging plates. In actual use, the hanging plates on the track beams and the hanging plates on the capping beams are both connected to their main bodies by welding. Since they are in a suspended state, the welds are unevenly stressed, resulting in a situation of relatively large local stress and prominent fatigue problems. In addition, the pin-type connection requires the corresponding pin holes of the hanging plates to be successfully connected, and the adjustable range of installation is very small, which requires a high level of steel structure processing.

[0004] In the support type support system, suspension boxes and corbels are arranged below the capping beam of the T-shaped pier and on both sides of the track beam, and supports are arranged above the corbels, and the track beam is supported on the supports. In actual use, although the fatigue problem and the processing accuracy problem of the pin-type support are solved, in order to provide sufficient support stiffness, a suspension box structure with a higher stiffness needs to be adopted, increasing the steel structure consumption.

[0005] Both the conventional pin-type and support-type support systems place the track beam below the overhanging part of the T-shaped pier. The pier and the capping beam need to be higher than the track beam, resulting in poor aesthetics, and the pier height is relatively high, and the deformation at the pier top is often relatively large. In addition, there is no connection between the two track beams on both sides, and they are all independent structures, so their lateral anti-deformation ability is weak, and the lateral deformation in the curve section is relatively large, resulting in poor driving comfort. Summary of the Invention

[0006] The purpose of the invention is to provide a double-track beam support system applicable to suspended monorails, which can at least solve some of the defects existing in the above-mentioned prior art.

[0007] To achieve the above purpose, the invention provides the following technical solution: A double-track beam support system applicable to suspended monorails, including two track beams arranged side by side, a pier and a cross beam are arranged between the two track beams and at the end of the track beam, a pier capping beam is provided at the top of the pier, the bottom of the cross beam is supported on the pier capping beam of the pier through a support, and both ends of the cross beam are respectively connected to the sides of the two track beams as a whole.

[0008] Further, the upper edge of the cross beam is flush with the upper edge of the track beam.

[0009] Further, an inner side box is additionally arranged within the range of the cross beam near the beam end of the track beam, and the end of the cross beam is connected to the inner side box.

[0010] Furthermore, the pier is a T-shaped pier, and its pier body is located between the two-track girders, and the edge of the pier body does not intrude into the vehicle clearance suspended on the track girder.

[0011] Furthermore, the capping beam of the pier is arranged in the lower half space between the two-track girders, and the lower edge of the end of the capping beam of the pier is flush with the lower edge of the track girder and does not intrude into the vehicle clearance suspended on the track girder.

[0012] Furthermore, the cross beam adopts a steel box section structure composed of a web, a top plate, a bottom plate, and stiffeners, and the stiffeners are arranged directly above the bearing.

[0013] Furthermore, the cross beam is longitudinally divided into two half cross beams at the middle position between the two-track girders, and the two half cross beams are spliced into a whole through a connecting component.

[0014] Furthermore, the connecting component includes a splicing plate and high-strength bolts, and a manhole is arranged at the splicing position of the two half cross beams.

[0015] Furthermore, a group of cross beams or two groups of cross beams arranged side by side are arranged on the capping beam of the pier.

[0016] In addition, the present invention also provides a construction method for the above-mentioned double-track girder support system applicable to a suspended monorail, including the following steps:

[0017] 1) Construct the pier and the capping beam of the pier on site;

[0018] 2) Prefabricate the track girder and the cross beam in the factory. The cross beam is prefabricated in two halves, and an assembly site is left at one end of the two half cross beams. Weld the end of the track girder away from the assembly site to the corresponding half cross beam, and the upper edge of the cross beam is flush with the upper edge of the track girder;

[0019] 3) Install the bearing on the capping beam of the pier, hoist the track girder to both sides of the pier, and bolt and splice the corresponding two half cross beams on the two sides of the track girder, and the construction of the double-track girder support system is completed.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] (1) The double-track girder support system applicable to a suspended monorail provided by the present invention connects the originally separated track girders into a whole through the cross beam, converts from the conventional independent single-track girders to double-track girders, improves the lateral stiffness, and has a relatively large transverse spacing of the bearings, so the main girder has good stability and improves the riding comfort; at the same time, the pier of it does not need to be higher than the track girder to extend and overhang, and the capping beam of the pier is arranged below the cross beam, reducing the structural height of the pier, giving full play to the material performance, reducing the material consumption, and improving the aesthetics.

[0022] (2) In the double-track beam support system applicable to the suspended monorail provided by the present invention, an adjustable support is adopted between the cross beam and the pier, which can adapt to the settlement and deformation generated during operation. At the same time, the support can be lifted for replacement, and the bolt connection of the cross beam can also be released to realize the replacement of the track beam, making maintenance and repair convenient. Moreover, this double-track beam support system is applicable to both simply supported and continuous track beams, and the structural design is flexible and variable.

[0023] (3) During the construction process of the double-track beam support system applicable to the suspended monorail provided by the present invention, all welding operations of the cross beam can be carried out in the factory, and only high-strength bolt connections are required for on-site construction. The installation construction is simple, and the quality is easy to be guaranteed.

[0024] The following will further elaborate on the present invention in conjunction with the accompanying drawings. Description of the Drawings

[0025] Figure 1 It is a schematic cross-sectional structure diagram of the double-track beam support system of the present invention;

[0026] Figure 2 It is a schematic connection structure diagram of the track beam and the cross beam in the present invention;

[0027] Figure 3 It is a schematic elevation layout diagram of the double-track beam support system applicable to the simply supported beam structure system in the embodiment of the present invention;

[0028] Figure 4 It is a schematic elevation layout diagram of the double-track beam support system applicable to the continuous beam structure system in the embodiment of the present invention;

[0029] Figure 5 It is a schematic structure diagram of an inner side box in the embodiment of the present invention.

[0030] Description of the reference numerals in the drawings: 1, pier; 2, pier top capping beam; 3, track beam; 4, support; 5, inner side box; 6, cross beam; 7, high-strength bolt; 8, splicing plate; 9, manhole; 10, top plate; 11, web; 12, stiffening rib; 13, bottom plate; 14, track beam stiffening rib; 15, beam top plate; 16, beam web; 17, diaphragm; 18, protruding part; 19, beam bottom plate. Detailed Embodiment

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0032] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention; in the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0033] like Figure 1 As shown, this embodiment provides a double-line track beam support system suitable for a suspended monorail, including two lines of track beams 3 arranged side by side, a pier 1 and a cross beam 6 are arranged between the two track beams 3 and at the ends of the track beam 3, a pier top cap beam 2 is provided on the top of the pier 1, and the bottom of the cross beam 6 is supported on the pier top cap beam 2 of the pier 1 through a support 4, and the two ends of the cross beam 6 are respectively connected to the side surfaces of the two lines of track beams 3 as a whole. For optimization, the upper edge of the cross beam 6 can be designed and arranged to be flush with the upper edge of the track beam 3. In this embodiment, the originally separated two-line track beams 3 are connected as a whole through the crossbeam 6, and the conventional independent single-line beams are converted into double-line beams, and a support 4 is arranged under the crossbeam 6 to support the pier top cover beam 2 of the pier 1, so that the load transfer path on the track beam 3 is the crossbeam 6-support 4-pier top cover beam 2, which improves the lateral stiffness of the double-line track beam structure and improves driving comfort; at the same time, the pier 1 of this embodiment does not need to be cantilevered higher than the track beam 3, and the pier top cover beam 2 is arranged under the crossbeam 6, which reduces the structural height of the pier 1, greatly saves the amount of steel used, and improves the aesthetics.

[0034] An optimized implementation manner, an inner side box 5 is additionally provided within the crossbeam range of the track beam 3 near the beam end, and the end of the crossbeam 6 is connected to the inner side box 5. Through the design of the inner side box 5, the load of the track beam 3 can be more evenly transferred to the crossbeam 6, further significantly improving the integrity of the track beam.

[0035] A specific implementation method, such as Figure 5 As shown, the inner side box 5 is composed of a beam top plate 15, a beam bottom plate 19 and two beam webs 16 arranged in parallel and spaced apart between the beam top plate 15 and the beam bottom plate 19 of the track beam 3, and the beam web 16 and the beam top plate 15 and the beam top plate 19 of the track beam 3 are surrounded to form a side box chamber, which is a closed structure and can form a closed shear flow, and then the track beam 3 can form a closed shear flow when subjected to force, so it has greater torsional stiffness.

[0036] Further optimized, a transverse partition 17 is provided in the side box chamber of the inner side box 5, and the transverse partition 17 is perpendicularly and intersectingly connected to the two beam webs 16 of the side box chamber; it can be understood that the plate surface of the transverse partition 17 is perpendicular to the longitudinal direction of the track. Among them, it is preferably that there are multiple transverse partitions 17 in the side box chamber, and the multiple transverse partitions 17 are arranged at intervals in the longitudinal direction of the track. By adding the transverse partitions 17, the structural integrity of the side box area and the smoothness and reliability of force transmission can be improved. Further, the upper and lower ends of the transverse partition 17 are respectively connected to the beam top plate 15 and the beam bottom plate 19, further improving the structural strength and stiffness of the track beam 3.

[0037] For the installation of the above-mentioned transverse partition 17, it is preferably welded to the two beam webs 16, the beam top plate 15 and the beam bottom plate 19 respectively. In one embodiment, a protruding portion 18 is provided at the transverse end of the transverse partition 17 close to the cross beam 6, and the protruding portion 18 penetrates through the corresponding beam web 16 and is welded to the beam web 16; the height of the protruding portion 18 is preferably less than the height of the transverse partition 17, and a through groove with a corresponding height is opened on the beam web 16 to allow the protruding portion 18 to pass through. Based on the above structure, on the one hand, through the cooperation of the protruding portion 18 and the through groove on the beam web 16, it is convenient for the alignment and assembly between the transverse partition 17 and the corresponding beam web 16. On the other hand, the welding method outside the box can be adopted, which is simple and convenient to operate and can ensure the welding quality. Specifically, during processing and manufacturing, first weld the transverse partition 17 to the beam top plate 15, the beam bottom plate 19 and one of the beam webs 16 (i.e., the beam web 16 far from the cross beam 6), then insert the other beam web 16 on the transverse partition 17 in a way that the protruding portion 18 and the through groove are interspersed with each other, and then weld outside the box to form a complete beam cross-section.

[0038] In a refined implementation manner, the pier 1 is a T-shaped pier, and its pier body is located between the two track beams 3, and the edge of the pier does not intrude into the vehicle clearance suspended on the track beam 3. The pier top cover beam 2 is arranged in the lower half space between the two track beams 3, and the lower edge of the end of the pier top cover beam 2 is flush with the lower edge of the track beam 3 and does not intrude into the vehicle clearance suspended on the track beam 3; this structural design makes the cross beam 6 + pier top cover beam 2 structure not higher than the cross-section of the track beam 3, ensuring the continuity of the appearance of the track beam 3 and being beneficial to increasing the permeability of the landscape.

[0039] Specifically, as Figure 2 shown, the cross beam 6 adopts a steel box-shaped cross-section structure composed of a web 11, a top plate 10, a bottom plate 13 and stiffening ribs 12. The stiffening ribs 12 are arranged directly above the support 4. The cross beam 6 and the inner side box 5 of the track beam 3 form an integral structure, further ensuring the lateral stiffness of the double-track beam structure.

[0040] Furthermore, for convenient transportation, the cross beam 6 can be designed as an assembled structure. In a specific implementation, the cross beam 6 is longitudinally divided into two half cross beams at the middle position between the two track beams 3, and the two half cross beams are spliced into a whole through a connecting component. In this way, when the single-sided track beam is manufactured in the factory, one half cross beam can be manufactured synchronously, and during on-site construction, the two half cross beams can be spliced into a whole through the connecting component arranged in the middle of the cross beam 3. Specifically, the connecting component includes a splicing plate 8 and high-strength bolts 7. The two half cross beams are connected into a whole by using high-strength bolts 7 and the splicing plate 8. At the same time, a manhole 9 is arranged at the splicing position of the two half cross beams to facilitate the tightening of the high-strength bolts 7.

[0041] In addition, the track beam 3 adopts a thin-walled cross-section structure with an open lower edge, and track beam stiffeners 14 are provided on the track beam 3. The supports 4 between the cross beam 6 and the bridge pier 1 are located at both ends of the bridge pier 1, and the transverse spacing of the supports 4 is increased as much as possible to improve the stability of the main beam. Optimally, the support 4 adopts a three-way adjustable support to adapt to the settlement and deformation generated during operation. At the same time, the support 4 can be lifted and replaced, and the bolt connection of the cross beam 6 can also be released to realize the replacement of the track beam 3, which is convenient for maintenance. The double-track beam support system of this embodiment can adjust the spatial position of the track beam 3 through two means. One is to use the bolt connection of the cross beam 6 to achieve adjustment within a certain accuracy range during the construction period, and the other is to use a three-way adjustable support to achieve the adjustment of the beam shape during the construction period and the operation stage. The construction accuracy requirements are relatively low, and the maintenance during the operation period is convenient.

[0042] As Figure 3 and Figure 4 shown, for the track beams of simply supported structures and continuous structures, the structure of the support system can be adjusted accordingly. That is, for the simply supported structure system, two groups of cross beams 6 are arranged side by side on the pier capping beam 2 of the bridge pier 1, and for the continuous structure system, one group of cross beams 6 is arranged on the pier capping beam 2 of the bridge pier 1. Correspondingly, the bridge pier 1 can be longitudinally widened according to the structural type of the track beam 3 to meet the placement space requirements of the supports 4.

[0043] This embodiment also provides a construction method for the above-mentioned double-track beam support system applicable to suspended monorails, which can make the welding and manufacturing of the bridge structure all carried out in the factory, and only hoisting and bolting operations are required on site, and the construction accuracy and quality are easy to control. The specific process is as follows:

[0044] First, construct the bridge pier 1 and the pier capping beam 2 on site.

[0045] Then, synchronously prefabricate the track beam 3 and the cross beam 6 in the factory. The cross beam 6 is prefabricated in two halves, and an assembly site is left at one end of the two half cross beams. The track beam 3 is welded to the end of the corresponding half cross beam away from the assembly site, and the upper edge of the cross beam 6 is flush with the upper edge of the track beam 3.

[0046] Finally, install the bearing 4 on the pier capping beam 2, transport the track beam 3 and the cross beam 6 to the construction site, hoist them to both sides of the pier 1, and at the same time, the two half cross beams are respectively supported on the bearings 4 at both ends of the pier capping beam 2, and bolt and assemble the two half cross beams corresponding to the two side track beams 3, thus completing the construction of the double-track beam support system. In this process, the track beam 3 can be hoisted as a whole or the cross beam 6 can be spliced after piecemeal hoisting, with flexible construction and simple operation.

[0047] The above examples are only illustrative of the present invention and do not constitute a limitation on the protection scope of the present invention. Any design identical or similar to the present invention falls within the protection scope of the present invention.

Claims

1. A double-track girder support system applicable to a suspended monorail, comprising two side-by-side arranged track girders, characterized in that: Between the two described track beams and at the ends of the track beams, there are piers and cross beams. On top of the piers, there are pier top cover beams. The bottom of the cross beam is supported on the pier top cover beam of the pier through bearings. The two ends of the cross beam are respectively connected to the sides of the two track beams to form a whole. On one side of the track beam close to the cross beam, there is an inner side box. The end of the cross beam is connected to the inner side box. The inner side box is composed of a beam top plate, a beam bottom plate of the track beam, and two beam web plates arranged in parallel and spaced apart between the beam top plate and the beam bottom plate of the track beam. And the beam web plates and the beam top plate and the beam top plate of the track beam enclose to form a side box chamber, which is a closed structure and can form a closed shear flow. Inside the side box chamber of the inner side box, there is a diaphragm. The diaphragm is vertically and intersectingly connected with the two beam web plates of the side box chamber. The upper and lower ends of the diaphragm are respectively connected to the beam top plate and the beam bottom plate. On the transverse end of the diaphragm close to the cross beam side, there is a protruding part, which penetrates through the corresponding beam web plate and is welded to the beam web plate.

2. The double-track girder support system applicable to a suspended monorail according to claim 1, characterized in that: The upper edge of the cross beam is flush with the upper edge of the track beam.

3. The double-track girder support system applicable to a suspended monorail according to claim 1, wherein: The pier is a T-shaped pier. Its pier body is located between the two track beams, and the edge of the pier does not intrude into the vehicle clearance suspended on the track beam.

4. The double-track girder support system applicable to the suspended monorail according to claim 1, wherein: The pier top cover beam is arranged in the lower half space between the two track beams. The lower edge of the end of the pier top cover beam is flush with the lower edge of the track beam and does not intrude into the vehicle clearance suspended on the track beam.

5. The double-track girder support system applicable to a suspended monorail according to claim 1, characterized in that: The cross beam adopts a steel box section structure composed of a web, a top plate, a bottom plate, and stiffening ribs. The stiffening ribs are arranged directly above the bearing.

6. The double-track girder support system applicable to the suspended monorail according to claim 1, wherein: The cross beam is longitudinally divided into two half cross beams at the middle position of the two track beams. The two half cross beams are spliced into a whole through a connection component.

7. The double-track girder support system for suspended monorail according to claim 6, characterized in that: The connection component includes a splicing plate and high-strength bolts, and a manhole is arranged at the splicing position of the two half cross beams.

8. The double-track girder support system applicable to the suspended monorail according to claim 1, characterized in that: One set of cross beams or two sets of cross beams arranged side by side are arranged on the pier top cover beam of the pier.

9. The construction method of the double-track girder support system applicable to the suspended monorail according to any one of claims 1 to 8, characterized in that, It includes the following steps: 1) Construct the pier and the pier top cover beam on site; 2) Prefabricate the track beam and the cross beam in the factory. The cross beam is prefabricated in two halves, and an assembly site is reserved at one end of the two half cross beams. Weld the end of the track beam away from the assembly site to the corresponding half cross beam, and the upper edge of the cross beam is flush with the upper edge of the track beam; 3) Install the bearing on the pier top cover beam, hoist the track beam to both sides of the pier, and bolt and splice the corresponding two half cross beams on the two sides of the track beam, then the construction of the double-track beam support system is completed.

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