Double H-shaped concrete track beam for rubber-tyred tram and construction method thereof

Abstract

The invention discloses a double H-shaped concrete track beam for a rubber-wheeled tram and a construction method thereof, which is arranged on a bridge pier and includes a plurality of guide rail beam spans, and two adjacent guide rail beam spans are linked and connected; the guide rail beam span includes four webs, two bottom plates and a cross diaphragm; the four webs and two bottom plates are combined into a double "H"-shaped structure, and are connected and combined into an integrated structure through a cross diaphragm; each web is arranged to have an "I"-shaped cross section, and the top of each web and one side end of the top are provided with embedded wear-resistant steel plates; the cross diaphragm is located below the bottom plate, and the cross diaphragm includes two end cross diaphragms and a plurality of middle cross diaphragms; the two end cross diaphragms are located at both ends of the guide rail beam span, and the plurality of middle cross diaphragms are arranged in sequence. Compared with the existing steel guide rail beams, the double H-shaped concrete track beam has large overall rigidity, good driving comfort, low noise, good durability of the concrete structure, and small amount of later maintenance.

Description

Technical Field

[0001] The invention relates to the technical field of civil engineering, and more particularly to a double H-shaped concrete track beam for a rubber-tyred tram and a construction method thereof. Background Art

[0002] Yunba is a rail-type rubber-wheeled tram with a capacity of 6,000 to 10,000 passengers per hour. It is a small-capacity rubber-wheeled tram system and a new system in modern trams. It can improve the level of public transportation, fill in product gaps, and is committed to building a multi-level public transportation network. In recent years, it has been widely planned into the transportation trunk lines of small and medium-sized cities and the transportation branch lines of large and medium-sized cities. Currently, the first Yunba line is under construction in Bishan, Chongqing, and the project uses BYD steel rail beams.

[0003] As a new thing in recent years, there are two main types of beams used in some of the early projects of Yunba. The first is the steel guide rail beam launched by BYD, and the second is to set a steel guide rail on the top surface of a conventional concrete box beam. Although the steel guide rail beam launched by BYD is light in weight, it has the characteristics of low rigidity, poor driving comfort, relatively high noise, high cost, and high maintenance in the later stage. Adding a steel guide rail on the top of a conventional concrete box beam can facilitate the maintenance of the structure, but the structure is heavy, the cost is high, the construction convenience is poor, and it is wasteful to set a steel guide rail beam on the top of the beam.

[0004] Therefore, how to provide a double H-type concrete track beam for rubber-wheeled trams that not only has high overall stiffness of the track beam, good driving comfort, low noise, good durability of the concrete structure, and low amount of later maintenance - is a problem that technical personnel in this field urgently need to solve. Summary of the invention

[0005] In view of this, the present invention provides a double H-shaped concrete track beam for a rubber-tyred tram and a construction method thereof.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] A double H-shaped concrete track beam for a rubber-tyred tram is arranged on a bridge pier, and comprises a plurality of guide rail beam spans, and two adjacent guide rail beam spans are linked and connected; the guide rail beam spans comprise four webs, two bottom plates and a transverse diaphragm; the four webs and two bottom plates are combined into a double "H"-shaped structure, and then connected and combined into an integrated structure through the transverse diaphragm;

[0008] Each of the webs is configured to have an "I"-shaped cross section, and a pre-buried wear-resistant steel plate is provided at the top of each web and one side end of the top;

[0009] The transverse partition is located below the bottom plate, and the transverse partition includes two end transverse partitions and a plurality of middle transverse partitions; the two end transverse partitions are located at the two ends of the guide rail beam span, and the plurality of middle transverse partitions are arranged in sequence.

[0010] Preferably, the bottom plate is arranged with its top surface located 60 cm below the top surface of the web plate, and forms an open trough structure with two adjacent web plates.

[0011] The above scheme has the following effects: it serves as a maintenance and emergency passage and increases the overall rigidity of the track beam.

[0012] Preferably, each of the end transverse partitions is provided with one or more linking holes, and the end transverse partitions of two adjacent guide rail beam spans are linked and connected by connecting pieces passing through the linking holes.

[0013] Preferably, each of the end transverse diaphragms is correspondingly arranged at the top of the pier; and a plurality of the middle transverse diaphragms are arranged at intervals of 6m to 8m along the guide rail beam span direction, and are arranged between two of the end transverse diaphragms of a guide rail beam span.

[0014] Preferably, the double H-shaped concrete track beam of the rubber-tyred tram also includes a cable channel, and the cable channel is arranged at the bottom of both sides of the open trough structure.

[0015] Preferably, the linear shape of the guide rail beam span is set to be a straight line or / and a curve.

[0016] Preferably, the two end transverse partitions and the plurality of middle transverse partitions are all integral plate structures;

[0017] Or, each of the end transverse partitions is divided into two identical end transverse partition embedded steel plates; the connection between the two prefabricated end transverse partitions is provided with a cast-in-place wet joint; correspondingly, each of the middle transverse partitions is also divided into two identical middle transverse partition embedded steel plates, and the connection between the two prefabricated middle transverse partitions is provided with reserved bolt holes and middle transverse partition connecting steel plates.

[0018] Preferably, the web of the simply supported beam structure adopts an "I"-shaped cross-section with a constant height, and the web of the large-span continuous beam structure adopts an "I"-shaped web with a variable height.

[0019] Preferably, the track beams with a span greater than or equal to 16 meters adopt a prestressed concrete structure, and the track beams with a span less than 16 meters adopt an ordinary reinforced concrete structure.

[0020] The invention also discloses a construction method for a double H-shaped concrete track beam for a rubber-tyred tram, which specifically comprises: the double H-shaped concrete track beam for the rubber-tyred tram is cast in situ using an on-site bracket; or a single H track beam is centrally prefabricated and hoisted for construction.

[0021] Preferably, when centralized prefabrication and hoisting construction is adopted, the end transverse diaphragms on the top of the piers are connected by cast-in-place wet joints. After the prefabricated parts of the middle transverse diaphragms are hoisted into place, the corresponding parts of the two embedded steel plates of the middle transverse diaphragms are first welded and fixed, and then the two embedded steel plates of the middle transverse diaphragms are bolted and connected by connecting parts passing through the reserved bolt holes.

[0022] Compared with the prior art, the present invention has achieved the following technical effects:

[0023] The present invention uses a double H-shaped concrete track beam for rubber-wheeled trams composed of 4 webs, 2 bottom plates and several transverse partitions, which is compared with the existing concrete box beam top steel guide rail scheme. Each web top directly acts on a row of wheels, and the force is direct and clear; the webs all adopt an "I"-shaped cross-section structure, which can give full play to the good compressive performance of concrete; the transversely long bottom plate is cancelled, and a bottom plate whose top surface is located 60cm below the top surface of the web is set instead. The bottom plate is not only a load-bearing component that increases the overall rigidity of the track beam, but also serves as a maintenance and emergency passage. The amount of concrete is reduced by 20% to 40% compared with the box beam, and the steel guide rail beam on the top of the box beam is cancelled, which reduces the amount of steel; by setting the end transverse partition at the top of the pier, a middle transverse partition is set every 6 to 8m along the direction of the track beam, thereby enhancing the rigidity of the double H-shaped concrete track beam. Compared with the existing steel guide rail beams, the double H-shaped concrete track beams have greater overall rigidity, better driving comfort, less noise, better durability of the concrete structure, and less subsequent maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is an isometric view of a double H-shaped concrete track beam of a rubber-tyred tram of the present invention;

[0025] Figure 2 It is a cross-sectional view of the ends of a double H-shaped concrete track beam of a rubber-tyred tram of the present invention at equal heights;

[0026] Figure 3 It is a cross-sectional view of a prefabricated and assembled double H-shaped concrete track beam of equal height (middle transverse partition part) of a double H-shaped concrete track beam for a rubber-tyred tram of the present invention;

[0027] Figure 4 It is a cross-sectional view of a prefabricated middle transverse partition in a prefabricated and assembled double H-shaped concrete track beam of equal height for a rubber-tyred tram according to the present invention;

[0028] Figure 5 It is a cross-sectional view of a prefabricated and assembled equal-height double H-shaped concrete track beam (end transverse partition part) of an equal-height double H-shaped concrete track beam of a rubber-tyred tram of the present invention;

[0029] Figure 6It is a cross-sectional view of the middle part of a double H-shaped concrete track beam of equal height for a rubber-tyred tram of the present invention;

[0030] Figure 7 This is the plan view of 1 / 2 double H-shaped concrete track beam;

[0031] Figure 8 This is the elevation drawing of 1 / 2 equal height double H-shaped concrete track beam;

[0032] Fig. 9 This is the elevation view of the 1 / 2 variable height double H-shaped concrete track beam.

[0033] In the figure: 1. web; 2. bottom plate; 3. transverse partition; 31. end transverse partition; 311. connecting hole; 312. cast-in-place wet joint; 32. middle transverse partition; 321. bolt hole; 4. embedded wear-resistant steel plate; 5. open trough structure; 6. cable channel; 7. middle transverse partition connecting steel plate. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] Example

[0036] Reference Figure 1 A double H-shaped concrete track beam for a rubber-tyred tram is provided on a bridge pier and includes a plurality of guide beam spans, and two adjacent guide beam spans are linked and connected;

[0037] The guide rail beam span includes 4 webs 1, 2 bottom plates 2 and a transverse partition 3; the 4 webs 1 and the 2 bottom plates 2 are combined into a double "H"-shaped structure, and then connected and combined into an integral structure through the transverse partition 3; each web 1 is configured to have an "I"-shaped cross-section, and the top of each web and one side of its top are provided with embedded wear-resistant steel plates 4; and the bottom plate 2 is arranged at a position where its top surface is 60 cm below the top surface of the web 1, and forms an open trough structure 5 with two adjacent webs 1; cable channels 6 are provided at the bottom of both sides of the open trough structure 5.

[0038] The diaphragm 3 is located below the bottom plate 2, and the diaphragm 3 includes two end diaphragms 31 and a plurality of middle diaphragms 32. The two end diaphragms 31 are located at the two ends of the guide rail beam span, and each end diaphragm 31 is correspondingly arranged at the top of the pier; each end diaphragm 31 is provided with one or more linking holes 311, and the end diaphragms 31 of two adjacent guide rail beam spans are linked and connected through the linking holes 311 by connecting pieces. A plurality of middle diaphragms 32 are arranged at intervals of 6m to 8m along the guide rail beam span direction, and are arranged between the two end diaphragms 31 of a guide rail beam span.

[0039] In some embodiments, the linear shape of the guide rail beam span is set to be straight or / and curved.

[0040] In some embodiments, the web of the simply supported beam structure adopts an "I"-shaped cross-section with a constant height, and the web of the long-span continuous beam structure adopts an "I"-shaped web with a variable height.

[0041] In some embodiments, the track beam with a span greater than or equal to 16 meters adopts a prestressed concrete structure, and the track beam with a span less than 16 meters adopts an ordinary reinforced concrete structure.

[0042] In some embodiments, the two end transverse partitions 31 and the plurality of middle transverse partitions 32 are all integral plate structures.

[0043] In some other embodiments, each end transverse partition 31 is divided into two identical end transverse partition embedded steel plates; the connection between the two prefabricated end transverse partitions is provided with a cast-in-place wet joint 312; accordingly, each middle transverse partition 32 is also divided into two identical middle transverse partition embedded steel plates, and the connection between the two prefabricated middle transverse partitions is provided with a reserved bolt hole 321 and a middle transverse partition connecting steel plate 7.

[0044] The present invention also provides a construction method for a double H-shaped concrete track beam for a rubber-tyred tram, wherein the double H-shaped concrete track beam for a rubber-tyred tram is cast in situ using an on-site bracket;

[0045] Or a single H-track beam is used for centralized prefabrication and hoisting construction; when centralized prefabrication and hoisting construction is adopted, the end transverse diaphragm 31 on the top of the pier is connected by a cast-in-place wet joint 312, and after the prefabricated parts of the middle transverse diaphragm 32 are hoisted into place, the corresponding parts of the two middle transverse diaphragm embedded steel plates are first welded and fixed, and then the two middle transverse diaphragm embedded steel plates are bolted and connected through the connecting parts through the reserved bolt holes 321.

[0046] The present invention uses a double H-shaped concrete track beam for rubber-wheeled trams composed of 4 webs, 2 bottom plates and several transverse partitions, which is compared with the existing concrete box beam top steel guide rail scheme. Each web top directly acts on a row of wheels, and the force is direct and clear; the webs all adopt an "I"-shaped cross-section structure, which can give full play to the good compressive performance of concrete; the transversely long bottom plate is cancelled, and a bottom plate whose top surface is located 60cm below the top surface of the web is set instead. The bottom plate is not only a load-bearing component that increases the overall rigidity of the track beam, but also serves as a maintenance and emergency passage. The amount of concrete is reduced by 20% to 40% compared with the box beam, and the steel guide rail beam on the top of the box beam is cancelled, which reduces the amount of steel; by setting the end transverse partition at the top of the pier, a middle transverse partition is set every 6 to 8m along the direction of the track beam, thereby enhancing the rigidity of the double H-shaped concrete track beam. Compared with the existing steel guide rail beams, the double H-shaped concrete track beams have greater overall rigidity, better driving comfort, less noise, better durability of the concrete structure, and less subsequent maintenance.

[0047] The above description is only a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any slight modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A double H-shaped concrete track beam for a rubber-tyred tram, arranged on a bridge pier, characterized in that: It includes a plurality of guide rail beam spans, and two adjacent guide rail beam spans are linked and connected; The guide rail beam span comprises four webs (1), two bottom plates (2) and a transverse partition (3); the four webs (1) and the two bottom plates (2) are combined into a double "H"-shaped structure, and then connected and combined into an integrated structure via the transverse partition (3); Each of the webs (1) is configured to have an "I"-shaped cross section, and a pre-embedded wear-resistant steel plate (4) is provided at the top end of each web and at one side end of the top thereof; The transverse partition (3) is located below the bottom plate (2), and the transverse partition (3) includes two end transverse partitions (31) and a plurality of middle transverse partitions (32); the two end transverse partitions (31) are located at both ends of the guide rail beam span, and the plurality of middle transverse partitions (32) are arranged in sequence; The bottom plate (2) is arranged with its top surface located 60 cm below the top surface of the web (1), and forms an open slot structure (5) with two adjacent webs (1); Each of the end transverse diaphragms (31) is provided with one or more linking holes (311), and the end transverse diaphragms (31) of two adjacent guide rail beam spans are linked and connected by connecting pieces passing through the linking holes (311); each of the end transverse diaphragms (31) is correspondingly arranged at the top of the pier; and a plurality of the middle transverse diaphragms (32) are arranged at intervals of 6m to 8m along the direction of the guide rail beam span, and are arranged between the two end transverse diaphragms (31) of one guide rail beam span.

2. The double H-shaped concrete track beam for rubber-tyred tram according to claim 1, characterized in that: It also comprises a cable channel (6), wherein the cable channel (6) is arranged at the bottom of both sides of the open slot structure (5).

3. The double H-shaped concrete track beam for rubber-tyred tram according to claim 1, characterized in that: The linear shape of the guide rail beam span is set to be a straight line or / and a curve.

4. A double H-shaped concrete track beam for a rubber-tyred tram according to any one of claims 1 to 3, characterized in that: The two end transverse partitions (31) and the plurality of middle transverse partitions (32) are all integral plate structures; Alternatively, each of the end transverse partitions (31) is divided into two identical end transverse partition pre-embedded steel plates; a cast-in-place wet joint (312) is provided at the connection between the two prefabricated end transverse partitions; correspondingly, each of the middle transverse partitions (32) is also divided into two identical middle transverse partition pre-embedded steel plates, and a reserved bolt hole (321) and a middle transverse partition connecting steel plate (7) are provided at the connection between the two prefabricated middle transverse partitions.

5. A construction method for a double H-shaped concrete track beam for a rubber-tyred tram as claimed in claim 4, characterized in that: The double H-shaped concrete track beams of rubber-tyred trams are cast in situ by on-site brackets; or the single H-shaped track beams are centrally prefabricated and hoisted for construction; When centralized prefabrication and hoisting construction is adopted, the end transverse diaphragms (31) at the top of the pier are connected via cast-in-place wet joints (312). After the prefabricated parts of the middle transverse diaphragm (32) are hoisted into place, the corresponding parts of the two middle transverse diaphragm embedded steel plates are first welded and fixed, and then the two middle transverse diaphragm embedded steel plates are bolted and connected via a connecting piece passing through the reserved bolt holes (321).

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