A concrete-truss composite structure suitable for straddle-type monorails

Abstract

This utility model relates to the field of rail transit technology and discloses a concrete-truss composite structure suitable for straddle-type monorails, comprising: a track beam, which consists of two sets of steel trusses, two sets of upper concrete slabs, two sets of lower concrete slabs, and several crossbeams; the upper concrete slabs are located at the upper chord position of the steel trusses, and the lower concrete slabs are located at the lower chord position of the steel trusses; the crossbeams are located between the two sets of lower concrete slabs and are set at predetermined intervals along the bridge span at the nodes of the steel trusses; piers are located at both ends of the bottom of the track beam; and foundation load-bearing bodies are located at the bottom of the piers. This utility model, through the concrete top and bottom slabs and triangular steel trusses, adapts to the medium span and double-track operation requirements of straddle-type monorails, reducing the self-weight of the track beam, reducing steel consumption and lowering costs, improving construction efficiency through prefabrication, and optimizing landscape harmony through the transparent design of the trusses, thus achieving optimization of structure, efficiency, and operation and maintenance.

Description

Technical Field

[0001] This utility model relates to the field of rail transit technology, and more specifically, to a concrete-truss composite structure suitable for straddle-type monorails. Background Technology

[0002] As a medium-capacity rail transit system, the straddle-type monorail boasts advantages such as strong adaptability, low noise, small turning radius, and outstanding climbing ability, enabling it to efficiently adapt to complex terrain. The track beam serves the dual function of a load-bearing structure and a vehicle running track, making it an indispensable core technology of the system.

[0003] Currently, domestic and international rail bridge systems have evolved to meet varying span requirements, resulting in a variety of typical beam structures. For conventional medium spans, two main forms have emerged: continuous rigid concrete frames and steel-concrete composite beams, which combine concrete bridge decks with steel structures. However, both have significant limitations in practical applications. Concrete structures are heavy and have limited room for increasing span. Steel-concrete composite structures, except for the concrete bridge deck, consist entirely of steel, leading to high costs due to the large amount of steel used. The monolithic design of the bridge sides creates a heavy appearance and poor aesthetic harmony. Furthermore, the narrow internal space of individual steel beams prevents personnel from entering for maintenance, significantly hindering the later operation and maintenance of the rail bridge.

[0004] No effective solutions have yet been proposed to address the problems in the relevant technologies. Utility Model Content

[0005] In view of the problems in the related technologies, this utility model proposes a concrete-truss composite structure suitable for straddle-type monorails to overcome the above-mentioned technical problems existing in the existing related technologies.

[0006] Therefore, the specific technical solution adopted by this utility model is as follows: A concrete-truss composite structure suitable for straddle-type monorails includes: a track beam for bearing the entire load of the straddle-type monorail train and its electromechanical system, and guiding the vehicle; the track beam consists of two sets of steel trusses, two sets of upper concrete slabs, two sets of lower concrete slabs, and several crossbeams; wherein the upper concrete slabs are located at the upper chord position of the steel trusses, and the lower concrete slabs are located at the lower chord position of the steel trusses; crossbeams are located between the two sets of lower concrete slabs for connecting the two sets of lower concrete slabs, and the crossbeams are set at predetermined intervals along the bridge span at the nodes of the steel trusses; piers are located at both ends of the bottom of the track beam for supporting the upper load of the track beam; and foundation bearing bodies are located at the bottom of the piers for transferring the load of the piers to the soil layer through pile-soil action.

[0007] Furthermore, in order to bear the entire load of the straddle-type monorail train and the electromechanical system, and to guide the vehicle, the steel truss has a triangular truss facade; and the steel truss consists of two sets of webs and several partitions disposed between the two sets of webs; the partitions include first partitions disposed at the upper chord and lower chord positions of the steel truss, several second partitions disposed between adjacent sets of two first partitions; and third partitions connected to the first partitions disposed between adjacent sets of two second partitions; the first partitions are transverse partitions, the length of which is equal to the longitudinal length of the web, and the first partitions are continuous at the nodes of the steel truss and arranged along the entire length; the second partitions are disposed at the midpoint between the upper chord and lower chord positions of the steel truss, the second partitions are oblique partitions, and the second partitions are discontinuous at a predetermined distance from the nodes of the steel truss; the third partitions are disposed at the nodes of the steel truss and are vertical partitions.

[0008] Furthermore, in order to support all the superstructure loads of the track beam, the pier has a T-shaped cross-section. The pier includes a cap beam set at the bottom of the crossbeam, and a pier column is set at the bottom of the cap beam, with the pier column set at the top of the foundation load-bearing body. The cap beam has a variable cross-section rectangular section, and the pier column has a constant cross-section rectangular section.

[0009] Furthermore, in order to transfer all the loads of the piers to the soil layer through pile-soil action, the foundation bearing body includes a pile cap set at the bottom of the pier column, and pile foundations are symmetrically arranged at the bottom of the pile cap; wherein, the cross-section of the pile cap is a rectangular structure, and the cross-section of the pile foundation is a circular structure.

[0010] The beneficial effects of this utility model are as follows: This utility model, through the combined design of concrete top and bottom slabs and triangular steel trusses, is suitable for straddle-type monorails with medium spans of 30m to 50m and double-track operation requirements. It reduces the self-weight of the track beam, breaks through the traditional span limitations of concrete beams, reduces the amount of steel used and lowers the cost, improves construction efficiency through prefabrication, optimizes landscape coordination with the transparent design of the truss, avoids the drawbacks of traditional beam types, and achieves multiple optimizations in structure, efficiency and operation and maintenance, supporting the efficient operation of medium-capacity rail transit systems. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is a general elevation view of a concrete-truss composite structure applicable to straddle-type monorails according to an embodiment of the present utility model; Figure 2This is a general cross-sectional view of a concrete-truss composite structure applicable to straddle-type monorails according to an embodiment of the present utility model; Figure 3 This is a three-dimensional axonometric drawing of the track beam in a concrete-truss composite structure applicable to straddle-type monorails according to an embodiment of the present invention. Figure 4 This is one of the construction steps diagrams for the track beam in a concrete-truss composite structure applicable to straddle-type monorails according to an embodiment of this utility model; Figure 5 This is the second construction step diagram of the track beam in the concrete-truss composite structure applicable to straddle-type monorail according to the embodiments of this utility model; Figure 6 This is the third step diagram of the construction steps of the track beam in the concrete-truss composite structure applicable to straddle-type monorails according to the embodiments of this utility model; Figure 7 This is the fourth step diagram of the construction steps of the track beam in the concrete-truss composite structure applicable to straddle-type monorails according to the embodiments of this utility model. Figure 8 This is a schematic diagram showing the upper chord position, lower chord position, and node position of the steel truss in a concrete-truss composite structure suitable for straddle-type monorails according to an embodiment of the present utility model. Figure 9 This is a summary diagram of the track beam concrete structure in a concrete-truss composite structure applicable to straddle-type monorails according to an embodiment of the present utility model; Figure 10 This is a detailed drawing of the track beam web in a concrete-truss composite structure applicable to straddle-type monorails according to an embodiment of the present utility model. Figure 11 This is a detailed drawing of the track beam partition in a concrete-truss composite structure suitable for straddle-type monorails according to an embodiment of the present utility model.

[0013] In the picture: 1. Track beam; 101. Steel truss beam; 1011. Web plate; 1012. Diaphragm; 10121. First diaphragm; 10122. Second diaphragm; 10123. Third diaphragm; 102. Upper concrete slab; 103. Lower concrete slab; 104. Crossbeam; 2. Pier; 201. Cap beam; 202. Pier column; 3. Foundation load-bearing body; 301. Pier cap; 302. Pile foundation; 4. Support; 5. Pad block; 6. Cushion layer; 7. Upper chord position; 8. Lower chord position; 9. Node position. Detailed Implementation

[0014] To further illustrate the various embodiments, the present invention provides accompanying drawings, which are part of the disclosure of the present invention. These drawings are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, those skilled in the art should be able to understand other possible implementation methods and the advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are usually used to represent similar components.

[0015] According to an embodiment of the present invention, a concrete-truss composite structure suitable for straddle-type monorails is provided.

[0016] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments, such as... Figures 1-11 As shown, the concrete-truss composite structure applicable to straddle-type monorails according to an embodiment of this utility model includes: a track beam 1, used to bear the entire load of the straddle-type monorail train and electromechanical system, and to guide the vehicle; the track beam 1 is composed of two sets of steel truss beams 101, two sets of upper concrete slabs 102, two sets of lower concrete slabs 103, and several crossbeams 104; wherein, the upper concrete slabs 102 are located at the upper chord position 7 of the steel truss beams 101, and the lower concrete slabs 103 are located at the lower chord position 8 of the steel truss beams 101; the crossbeams 104 are located between the two sets of lower concrete slabs 103, used to connect the two sets of lower concrete slabs 103, and the crossbeams 104 are set at predetermined intervals along the bridge span direction at node positions 9 of the steel truss beams 101; piers 2 are set at both ends of the bottom of the track beam 1, used to support the upper load of the track beam 1; foundation bearing bodies 3 are set at the bottom of the piers 2, used to transfer the load of the piers 2 to the soil layer through pile-soil action.

[0017] With the help of the above-mentioned technical solution of this utility model, this utility model, through the combination design of concrete top and bottom plates and triangular steel trusses, is suitable for the medium span of straddle-type monorails of 30m to 50m and the needs of double-track operation. It not only reduces the self-weight of the track beam and breaks through the span limit of traditional concrete beams, but also reduces the amount of steel used and lowers the cost. Prefabrication improves construction efficiency, and the transparent design of the truss optimizes the landscape coordination, avoids the drawbacks of traditional beams, and achieves multiple optimizations in structure, efficiency and operation and maintenance, supporting the efficient operation of medium-capacity rail transit systems.

[0018] It should be noted that this utility model is applicable to medium-span applications, generally ranging from 30m to 50m. The concrete-truss composite structure is suitable for double-track operation. Track beam 1 is a beam-track integrated structure, serving as both the load-bearing structure for the vehicle and its own structural weight, and the track structure for vehicle operation. Track beam 1 is a prefabricated structure, which can be prefabricated in a factory or fabricated in a temporary beam yard. The track beam is a novel composite structure, belonging to a simply supported structural system.

[0019] like Figure 1 As shown, the concrete-truss composite structure is generally composed of three main components: track beam 1, pier 2, and foundation load-bearing body 3. Each component is composed of its own sub-components. Track beam 1 is a precast component in the factory, while pier 2 and foundation load-bearing body 3 are cast-in-place components.

[0020] In one embodiment, for the aforementioned track beam 1, the elevation of the steel truss beam 101 is a triangular truss; and the steel truss beam 101 is composed of two sets of webs 1011 and a plurality of partitions 1012 disposed between the two sets of webs 1011; the partitions 1012 include first partitions 10121 disposed at the upper chord position 7 and the lower chord position 8 of the steel truss beam 101, and a plurality of second partitions 10122 disposed between two adjacent sets of first partitions 10121; a third partition 10123 connected to the first partition 10121 is disposed between two adjacent sets of second partitions 10122; the first partitions 10121... 0121 is a transverse partition. The length of the first partition 10121 is equal to the longitudinal length of the web 1011, and the first partition 10121 is continuous at the node position 9 of the steel truss beam 101 and is arranged along the entire length. The second partition 10122 is located between the upper chord position 7 and the lower chord position 8 of the steel truss beam 101. The second partition 10122 is an oblique partition, and the second partition 10122 is discontinuous at a predetermined distance at the node position 9 of the steel truss beam 101. The third partition 10123 is located at the node position 9 of the steel truss beam 101, and the third partition 10123 is a vertical partition.

[0021] It should be explained that the track beam 1 is located at the top of the concrete-truss composite structure in space. It has two functions: first, to bear the entire load of the straddle-type monorail train and the electromechanical system; and second, to serve as the track for the straddle-type monorail train and guide the vehicle.

[0022] Steel truss 101 is a triangular truss in elevation. Its material is steel structure and should conform to the standard "Structural Steel for Bridges" (GB / T714).

[0023] The steel truss beam 101 is welded together from web plate 1011 and diaphragm plate 1012. The web plate 1011 is a plate parallel to the direction of the bridge facade, and the diaphragm plate 1012 is a plate perpendicular to the direction of the bridge facade. Each steel truss beam 101 consists of two web plates 1011 and several diaphragm plates 1012.

[0024] The partition 1012 is a plate that connects the two web plates 1011 by welding. There are three types: The first type (i.e., the first partition 10121) is a partition at the upper chord position 7 and the lower chord position 8, with a length equal to the longitudinal length of the web plate 1011, and it is continuous at the node position 9. The second type (i.e., the second partition 10122) is an oblique partition located between the upper chord position 7 and the lower chord position 8, and this partition is broken at a certain distance at the node position 9. The third type (the third partition 10123) is a vertical partition set at the node position 9.

[0025] The upper concrete slab 102 is located at position 7 of the upper chord of the steel truss beam 101, and its size can cover the upper chord of the steel truss beam 101. The lower concrete slab 103 is located at position 8 of the lower chord of the steel truss beam 101, and its size can cover the lower chord of the steel truss beam 101. The crossbeam 104 is located between the two lower concrete slabs 103 and is used to connect the two lower concrete slabs 103. It is arranged at regular intervals at node positions 9 of the steel truss beam 101 along the bridge span direction.

[0026] The specific steps for constructing track beam 1 in the factory are as follows: The first step is to fix the welded and assembled steel truss beam 101 onto the temporary pad 5, with the temporary pad 5 located at node 9 of the steel truss beam 101. The second step is to erect a support frame 4 around the steel truss beam 101. A cushion layer 6 needs to be poured under the support frame 4 to ensure the stability of the support frame 4.

[0027] The third step is to pour the upper concrete slab 102, the lower concrete slab 103, and the crossbeam 104, and then cure them. At this time, the support 4 is not removed.

[0028] The fourth step is to remove support 4 after maintenance, and the track beam 1 is then manufactured.

[0029] In one embodiment, for the aforementioned pier 2, the cross-section of the pier 2 is a T-shaped structure. The pier 2 includes a cap beam 201 set at the bottom of the crossbeam 104, and a pier column 202 is set at the bottom of the cap beam 201, and the pier column 202 is set at the top of the foundation load-bearing body 3; wherein, the cross-section of the cap beam 201 is a variable cross-section rectangular section, and the cross-section of the pier column 202 is a constant cross-section rectangular section.

[0030] It should be explained that pier 2 is a concrete structure, which is cast on site at the bridge location. Pier 2 serves as the supporting structure for track beam 1, and is used to support all the upper loads of track beam 1. In space, pier 2 is located below track beam 1 and above the foundation load-bearing body 3.

[0031] In one embodiment, the foundation bearing body 3 includes a foundation 301 set at the bottom of the pier 202, and pile foundations 302 are symmetrically arranged at the bottom of the foundation 301; wherein, the cross-section of the foundation 301 is a rectangular structure, and the cross-section of the pile foundations 302 is a circular structure.

[0032] It should be explained that the foundation load-bearing body 3 is the supporting structure of the pier 2. Its function is to transfer all the load of the pier 2 to the soil layer through the pile-soil action. Furthermore, both the pier cap 301 and the pile foundation 302 are cast-in-place concrete structures.

[0033] To facilitate understanding of the above-mentioned technical solutions of this utility model, the working principle or operation method of this utility model in actual process will be described in detail below.

[0034] In practical applications, the track beam 1 is manufactured in the factory (the specific steps of the construction of the track beam 1 in the factory are as described above), and the pier 2 and the foundation load-bearing body 3 are poured on site simultaneously. The on-site pouring sequence is to first pour the foundation load-bearing body 3, and then pour the pier 2. After the pier 2 and the foundation load-bearing body 3 are poured and cured, the track beam 1 is transported to the site and erected, ultimately forming a concrete-truss composite structure.

[0035] In summary, by utilizing the above-mentioned technical solution of this utility model, the present utility model, through the combined design of concrete top and bottom slabs and triangular steel trusses, is suitable for the medium span and double-track operation requirements of straddle-type monorails with spans of 30m to 50m. It not only reduces the self-weight of the track beam and breaks through the span limitations of traditional concrete beams, but also reduces the amount of steel used and lowers the cost. Prefabrication improves construction efficiency, and the transparent design of the truss optimizes the landscape coordination, avoids the drawbacks of traditional beam types, and achieves multiple optimizations in structure, efficiency and operation and maintenance, supporting the efficient operation of medium-capacity rail transit systems.

[0036] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two sets of components or the interaction between two sets of components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0037] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A concrete-truss composite structure suitable for straddle-type monorails, characterized in that, include: The track beam (1) is used to bear the entire load of the straddle-type monorail train and the electromechanical system, and to guide the vehicle; the track beam (1) consists of two sets of steel truss beams (101), two sets of upper concrete slabs (102), two sets of lower concrete slabs (103) and several crossbeams (104). The upper concrete slab (102) is located at the upper chord position (7) of the steel truss beam (101), and the lower concrete slab (103) is located at the lower chord position (8) of the steel truss beam (101). The crossbeam (104) is located between the two sets of lower concrete slabs (103) and is used to connect the two sets of lower concrete slabs (103). The crossbeam (104) is set at predetermined intervals along the bridge span at the node positions (9) of the steel truss girder (101); and, Piers (2) are set at both ends of the bottom of the track beam (1) to support the upper load of the track beam (1); The foundation bearing body (3) is set at the bottom of the pier (2) to transfer the load of the pier (2) to the soil layer through the pile-soil action.

2. A concrete-truss composite structure suitable for straddle-type monorails according to claim 1, characterized in that, The elevation of the steel truss (101) is a triangular truss; The steel truss beam (101) is composed of two sets of webs (1011) and a number of partitions (1012) disposed between the two sets of webs (1011).

3. A concrete-truss composite structure suitable for straddle-type monorails according to claim 2, characterized in that, The partition (1012) includes a first partition (10121) disposed at the upper chord position (7) and the lower chord position (8) of the steel truss (101), and a plurality of second partitions (10122) are disposed between two adjacent sets of the first partitions (10121). A third partition (10123) connected to the first partition (10121) is provided between two adjacent groups of the second partition (10122).

4. A concrete-truss composite structure suitable for straddle-type monorails according to claim 3, characterized in that, The first partition (10121) is a transverse partition. The length of the first partition (10121) is equal to the longitudinal length of the web (1011). The first partition (10121) is continuous at the node position (9) of the steel truss (101) and is arranged along the entire length.

5. A concrete-truss composite structure suitable for straddle-type monorails according to claim 3, characterized in that, The second partition (10122) is located in the middle of the upper chord position (7) and the lower chord position (8) of the steel truss beam (101). The second partition (10122) is an oblique partition, and the second partition (10122) is disconnected at a preset distance from the node position (9) of the steel truss beam (101).

6. A concrete-truss composite structure suitable for straddle-type monorails according to claim 3, characterized in that, The third partition (10123) is located at the node position (9) of the steel truss beam (101), and the third partition (10123) is a vertical partition.

7. A concrete-truss composite structure suitable for straddle-type monorails according to claim 6, characterized in that, The cross section of the pier (2) is a T-shaped structure. The pier (2) includes a cap beam (201) set at the bottom of the cross beam (104). A pier column (202) is set at the bottom of the cap beam (201), and the pier column (202) is set at the top of the foundation load-bearing body (3). The cross-section of the cap beam (201) is a variable cross-section rectangular section, and the cross-section of the pier column (202) is a constant cross-section rectangular section.

8. A concrete-truss composite structure suitable for straddle-type monorails according to claim 7, characterized in that, The foundation load-bearing body (3) includes a pile cap (301) set at the bottom of the pier (202), and pile foundations (302) are symmetrically arranged at the bottom of the pile cap (301). The cross-section of the pier cap (301) is rectangular, and the cross-section of the pile foundation (302) is circular.

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