A track beam combined structure suitable for straddle-type monorail

Abstract

The application discloses a track beam combined structure suitable for straddle type monorail, which comprises a steel structure longitudinal beam and a prefabricated track beam, both sides of the steel structure longitudinal beam are provided with transverse bulkheads, the prefabricated track beam is connected with the transverse bulkheads through a connecting piece, the prefabricated track beam is a horseshoe structure and internally provided with a long circular hole which is hollowed out in the middle, the structure is simple and reasonable, the rigidity of the prefabricated track beam can be improved, the space for arranging the longitudinal prestressed steel strands of the bottom plate can be increased, the chamfering of the widened part and the web plate can reduce the stress concentration of the prefabricated track beam, the insufficient transverse rigidity of the straddle type monorail track beam can be solved, the driving comfort can be influenced, and the investment cost of the evacuation platform can be reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of straddle-type monorail equipment, in particular to a track beam combined structure suitable for straddle-type monorail. BACKGROUND

[0002] Straddle-type monorail belongs to medium-capacity rail transit system, and has the characteristics of strong adaptability, low noise, small turning radius and strong climbing ability, and can better adapt to complex topography and geomorphology environment. The track beam is not only a load-bearing structure, but also a track for vehicle operation, and therefore, the track beam is one of the key technologies of the straddle-type monorail system.

[0003] Disadvantages of prior art:

[0004] The track beam of the straddle-type monorail at home and abroad generally adopts a prefabricated prestressed concrete structure, and two track beams are transversely arranged for a double-line standard track beam. The two track beams are independent of each other. Although this arrangement is beneficial to the hoisting of the prefabricated track beam and improves the construction efficiency, the structure has the following disadvantages: first, due to the narrow transverse width of the track beam, the transverse stiffness of the track beam is insufficient, and the transverse shaking of the vehicle during operation is obvious, which affects the riding comfort. Second, due to the separation of the two track beams in the transverse direction, an independent evacuation structure needs to be separately arranged between the two track beams. Since the structure and the track beam are independent of each other, the evacuation structure has a large span, resulting in a large amount of evacuation structure engineering and increasing the engineering investment. SUMMARY

[0005] The present application aims to provide a track beam combined structure suitable for straddle-type monorail to solve the problems raised in the background.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a track beam combined structure suitable for straddle-type monorail, comprising a steel structure longitudinal beam and a prefabricated track beam, the two sides of the steel structure longitudinal beam are provided with transverse bulkheads, the prefabricated track beam is connected with the transverse bulkheads through a connecting piece, and the prefabricated track beam is in a horseshoe shape and has a long circular hole in the middle.

[0007] Preferably, the steel structure longitudinal beam comprises:

[0008] A first steel bottom plate, a plurality of first reinforcing plates are arranged on the upper end face of the first steel bottom plate, and the first reinforcing plates are arranged at intervals of 1.8-2.1 m;

[0009] A steel web plate, the steel web plate is arranged on both sides of the upper end face of the first steel bottom plate;

[0010] A first steel top plate, the first steel top plate is arranged on the upper end of the steel web plate, and the width of the first steel top plate is 750-850 mm.

[0011] Preferably, the transverse partition plate comprises:

[0012] A second steel bottom plate is arranged on one side of the first steel bottom plate, a plurality of second reinforcing plates are arranged on the upper end face of the second steel bottom plate, the second reinforcing plates are arranged at intervals of 3.8m-4.2m, and the lower end face of the prefabricated track beam, the first steel bottom plate and the second steel bottom plate are flush.

[0013] A second steel top plate is arranged on the upper end of the second reinforcing plate, and the first steel top plate and the second steel top plate are flush.

[0014] Preferably, the connecting piece comprises:

[0015] A pressure bearing plate is connected to the second steel bottom plate, the second reinforcing plate and the second steel top plate on one side respectively.

[0016] A connecting plate is arranged on the side of the pressure bearing plate away from the second steel bottom plate, and the connecting plate and the prefabricated track beam are connected through a plurality of shear studs.

[0017] Preferably, a plurality of stiffening ribs are arranged on the side of the steel web and the lower end face of the first steel top plate.

[0018] Preferably, the width of the horseshoe-shaped web of the prefabricated track beam is 0.69m, and the width of the bottom plate is 2.1m.

[0019] Preferably, the prefabricated track beam is a prestressed concrete structure.

[0020] Compared with the prior art, the present application has the following advantages:

[0021] 1. The track beam combined structure suitable for straddle-type monorail is characterized in that the steel structure longitudinal beam is provided with a transverse partition plate on both sides, the prefabricated track beam and the transverse partition plate are connected through a connecting piece, the prefabricated track beam is a horseshoe-shaped structure and internally provided with a long circular hole, the stiffness of the prefabricated track beam can be improved, the space for arranging the longitudinal prestressed steel strands of the bottom plate can be increased, the chamfering of the part and the web reduces stress concentration of the prefabricated track beam, and the problem of insufficient transverse stiffness of the straddle-type monorail track beam is solved.

[0022] 2. The track beam combined structure suitable for straddle-type monorail is characterized in that the steel structure longitudinal beam comprises a first steel bottom plate, a steel web and a first steel top plate, the transverse partition plate comprises a second steel bottom plate and a second steel top plate, the lower end face of the prefabricated track beam, the first steel bottom plate and the second steel bottom plate are flush, the lower end face of the prefabricated track beam, the first steel bottom plate and the second steel bottom plate can be used as an evacuation platform, the problem of insufficient transverse stiffness of the straddle-type monorail track beam is solved, the comfort of driving is affected, and the investment cost of the evacuation platform is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0023] Fig. 1 is a whole perspective view of the present application;

[0024] Fig. 2 is a whole structural schematic view of the present application.

[0025] In the figure: 1, steel structure longitudinal beam; 101, first steel bottom plate; 102, first reinforcing plate; 103, steel web; 104, first steel top plate; 2, prefabricated track beam; 3, transverse partition plate; 31, second steel bottom plate; 32, second reinforcing plate; 33, second steel top plate; 4, connecting piece; 41, pressure plate; 42, connecting plate; 5, stiffening rib. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0027] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0028] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "setting" should be understood broadly, for example, it can be fixedly connected, set, or detachably connected, set, or integrally connected, set. For those skilled in the art, the specific meaning of the above terms in the present patent can be understood according to the specific circumstances.

[0029] In addition, the terms "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "several" is two or more, unless otherwise explicitly specified and limited.

[0030] Please refer to Figs. 1-2As shown, the application provides a kind of track beam combination structure suitable for straddle-type monorail technical scheme: a kind of track beam combination structure suitable for straddle-type monorail, including steel structure longitudinal beam 1 and prefabricated track beam 2, both sides of steel structure longitudinal beam 1 are equipped with transverse bulkhead 3, prefabricated track beam 2 is connected between transverse bulkhead 3 by mounting connecting piece 4, prefabricated track beam 2 is long circular hole with middle hollow horseshoe structure, prefabricated track beam 2 is horseshoe structure, track beam adopts whole hole prefabrication, horseshoe web width 0.69m, bottom plate width 2.1m, horseshoe is hollow, and the self weight of concrete is reduced.

[0031] Steel structure longitudinal beam 1 includes first steel bottom plate 101, steel web 103 and first steel top plate 104, the upper end surface of first steel bottom plate 101 is welded with a plurality of first reinforcing plates 102, first reinforcing plate 102 is distributed with 1.8-2.1m interval between first reinforcing plate 102, manhole needs to be set in first reinforcing plate 102, and stiffener needs to be set in a circle of manhole, steel web 103 is welded on the upper end surface of first steel bottom plate 101 on both sides, first steel top plate 104 is welded on the upper end of steel web 103, and the width of first steel top plate 104 is 750mm-850mm, which is common to participate in bridge longitudinal stress with prefabricated track beam 2, wherein, first steel top plate 104 and first steel bottom plate 101 mainly bear bridge longitudinal bending moment, steel web 103 mainly bears shear force, first reinforcing plate 102 mainly plays the role of limiting steel beam torsional deformation, and the distortion is limited, which is important for the stability of steel structure longitudinal beam 1, steel structure longitudinal beam 1 and first reinforcing plate 102 are welded and assembled in factory, transported to site, hoisted to temporary support and welded with embedded part on site.

[0032] Transverse bulkhead 3 includes second steel bottom plate 31 and second steel top plate 33, second steel bottom plate 31 is welded on one side of first steel bottom plate 101, a plurality of second reinforcing plates 32 are welded on the upper end surface of second steel bottom plate 31, second reinforcing plate 32 is distributed with 3.8m-4.2m interval, the lower end surface of prefabricated track beam 2, first steel bottom plate 101 and second steel bottom plate 31 are flush, second steel top plate 33 is arranged on the upper end of second reinforcing plate 32, and first steel top plate 104 and second steel top plate 33 are flush.

[0033] The connecting piece 4 comprises a pressure bearing plate 41 and a connecting plate 42, one side of the pressure bearing plate 41 is connected with the second steel bottom plate 31, the second reinforcing plate 32 and the second steel top plate 33 respectively, the connecting plate 42 is welded on the side of the pressure bearing plate 41 far away from the second steel bottom plate 31, the pressure bearing plate 41 is exposed by 10mm and is welded with the second reinforcing plate 32 on site, the connecting plate 42 is connected with the prefabricated track beam 2 through installation of a plurality of shear nails, the length and thickness of the connecting plate 42 need to meet the shear nail structure requirement and the force transmission requirement, the pressure bearing plate 41, the connecting plate 42 and the shear nail are all welded and assembled in the factory and then pre-buried in the prefabricated track beam 2 to be jointly poured and formed, the shear nail is welded with the connecting plate 42 in the factory and is used for transmitting the shear force transmitted by the pressure bearing plate 41 and its connecting components, the shear nails are uniformly arranged at intervals, and the shear nail has strong shearing capacity and construction convenience.

[0034] A plurality of stiffening ribs 5 are welded on the side surface of the steel web 103 and the lower end surface of the first steel top plate 104, the stiffening ribs 5 of the first steel top plate 104 are mainly used for limiting the longitudinal compression instability of the first steel top plate 104, and the stiffening ribs 5 of the steel web 103 are mainly used for limiting the shear instability of the steel web 103.

[0035] The prefabricated track beam 2 is a prestressed concrete structure, adopts post-tensioning prestress tensioning, needs to pre-bury a prestress pipeline when prefabricating the prefabricated track beam 2, the prestress tensioning will produce an upward camber, the prefabricated track beam 2 needs to be calculated according to the dead weight, the secondary dead load and the prestress camber when prefabricating the prefabricated track beam 2, sets the corresponding reverse camber value, and the storage time of each prefabricated track beam 2 is not less than 90 days.

[0036] The working principle of the application is as follows:

[0037] The track beam combination structure suitable for straddle-type monorail of the embodiment changes the bottom structure of the prefabricated track beam 2 into a horseshoe structure in use, the prefabricated track beam 2 is internally provided with a long circular hole hollowed in the middle, which reduces the self weight of the beam body, saves the amount of beam body concrete and ordinary steel bars, has better economy, has similar cross section stress to the box section, has greater bending and torsional stiffness, has high cross section efficiency, the fulcrum, the middle span and the 1 / 4 span are provided with the transverse diaphragm 3, the transverse stiffness of the box beam is increased, the distortion effect is limited, the steel bars of the prefabricated track beam 2 are subjected to two stages of initial tension and final tension, the early concrete is prevented from cracking due to shrinkage, the width of the bottom concrete is widened outside the vehicle gauge range, which can improve the stiffness of the prefabricated track beam 2 and increase the space for arranging the longitudinal prestressed steel bars of the bottom plate, the widened part and the web are provided with chamfered transitions, the stress concentration of the prefabricated track beam 2 is reduced, the steel structure longitudinal beam 1 has a box section and is located in the middle of the two prefabricated track beams 2, the first steel bottom plate 101 and the first steel top plate 104 have a width of 800 mm, the first steel bottom plate 101 is flush with the bottom plate of the prefabricated track beam 2, the height of the first steel top plate 104 is flush with the vehicle bottom plate, and the first steel top plate 104 can be used as an evacuation platform, the steel structure longitudinal beam 1 has light weight but high strength, the steel structure longitudinal beam 1 is connected through the transverse diaphragm 3 to participate in the longitudinal stress of the prefabricated track beam 2, the distribution effect of the force of the prefabricated track beam 2 is reduced, the stiffening ribs 5 of the first steel top plate 104 and the steel web 103 are provided, the stiffening ribs 5 of the first steel top plate 104 are located in the middle of the inner side of the first steel top plate 104, the positions of the stiffening ribs 5 of the steel web 103 are aligned with the first steel top plate 104, the stiffening ribs 5 are welded with the first steel top plate 104 and the steel web 103, and then the plate assembly is formed, the box-shaped steel structure longitudinal beam 1 is longitudinally provided with the first reinforcing plate 102, the longitudinal distance between the first reinforcing plates 102 is 2 m, the transverse diaphragm 3 is located at the first reinforcing plate 102, the first reinforcing plate 102 is internally provided with an access hole to ensure longitudinal communication and facilitate later inspection and maintenance, the transverse diaphragm 3 is located in the middle of the two prefabricated track beams 2 and is used for transversely connecting the prefabricated track beams 2 and the steel structure longitudinal beam 1, the second reinforcing plate 32 is longitudinally provided with one every 4 m or so, the second reinforcing plate 32 is a steel structure in the shape of an I-beam, the second reinforcing plate 32 and the steel structure longitudinal beam 1 are welded and assembled in the factory and transported to the site for hoisting into place, the track beam structure adopts a 30 m simply supported structure system, the prefabricated track beam 2, the steel structure longitudinal beam 1 and the transverse diaphragm 3 are all prefabricated in the factory and transported to the site, the components are hoisted to the piers, the transverse diaphragm 3 is welded with the embedded components on site, and there is no cast-in-place operation on site.

[0038] The above shows and describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above-mentioned embodiments, and the above-mentioned embodiments and descriptions in the specification are only preferred examples of the present application and are not intended to limit the present application. Various changes and improvements can be made to the present application without departing from the spirit and scope of the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A track beam combined structure suitable for straddle-type monorail, comprising a steel structure longitudinal beam (1) and a prefabricated track beam (2), characterized in that: Both sides of the steel structure longitudinal beam (1) are provided with cross partition plates (3), the prefabricated track beam (2) and the cross partition plate (3) are connected through the setting of connecting pieces (4), the prefabricated track beam (2) is a horseshoe structure and internally provided with a long circular hole; The steel structure longitudinal beam (1) comprises: A first steel bottom plate (101), a plurality of first reinforcing plates (102) are arranged on the upper end face of the first steel bottom plate (101), and the first reinforcing plates (102) are arranged at intervals of 1.8-2.1 m; A steel web plate (103) is arranged on the upper end face of the first steel bottom plate (101) on both sides; A first steel top plate (104) is arranged on the upper end of the steel web plate (103), and the width of the first steel top plate (104) is 750mm-850mm; The cross partition plate (3) comprises: A second steel bottom plate (31) is arranged on one side of the first steel bottom plate (101), a plurality of second reinforcing plates (32) are arranged on the upper end face of the second steel bottom plate (31), the second reinforcing plates (32) are arranged at intervals of 3.8m-4.2m, and the lower end face of the prefabricated track beam (2), the first steel bottom plate (101) and the second steel bottom plate (31) are flush; A second steel top plate (33) is arranged on the upper end of the second reinforcing plate (32), and the first steel top plate (104) and the second steel top plate (33) are flush.

2. The track beam assembly for straddle-type monorail according to claim 1, wherein: The connecting piece (4) comprises: A pressure bearing plate (41) is connected with the second steel bottom plate (31), the second reinforcing plate (32) and the second steel top plate (33) on one side respectively; A connecting plate (42) is arranged on the side of the pressure bearing plate (41) away from the second steel bottom plate (31), and the connecting plate (42) is connected with the prefabricated track beam (2) through a plurality of shear nails.

3. The track beam assembly for straddle-type monorail according to claim 1, wherein: A plurality of stiffening ribs (5) are arranged on the side face of the steel web plate (103) and the lower end face of the first steel top plate (104).

4. The track beam assembly for straddle-type monorail according to claim 1, wherein: The width of the horseshoe web plate of the prefabricated track beam (2) is 0.69m, and the width of the bottom plate is 2.1m.

5. The track beam assembly for straddle-type monorail according to claim 1, wherein: The prefabricated track beam (2) is a prestressed concrete structure.

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