A single-cable long-span bridge structure suitable for straddle-type monorail

Abstract

The present invention provides a single-cable-plane long-span bridge structure suitable for straddle-type monorail, comprising two track beams arranged opposite to each other, a bridge tower located between the two track beams, and a cable-stayed cable; the bridge tower comprises an upper tower column, a lower tower column, and a bridge tower crossbeam located between the upper tower column and the lower tower column, the two track beams are respectively located on the two ends of the bridge tower crossbeam in the transverse direction of the bridge, the two track beams are connected by a longitudinal and transverse connecting beam structural member, the cable-stayed cable is a single-cable-plane cable located between the two track beams, one end of the cable-stayed cable is anchored and fixed to the longitudinal and transverse connecting beam structural member, and the other end is fixedly connected to the upper tower column. The bridge structure uses the steel track beam itself as a load-bearing structure, uses the longitudinal and transverse connecting beam structural member to strengthen the overall rigidity, and overcomes the limitation of the track beam cross-sectional size on the span, adopts a cable-stayed bridge structure, uses the cable-stayed cable as a vertical support, reduces the calculated bending moment of the track beam, and makes the bridge have a large span, a small structural height, strong permeability, and good landscape.

Description

Technical Field

[0001] The invention belongs to the technical field of rail transit bridge structures, and in particular relates to a single-cable-plane long-span bridge structure suitable for a straddle-type monorail. Background Art

[0002] The cross-section size of the straddle-type monorail beam is small and the span is limited. When the span is large, a beam-on-beam structure is generally used, such as Figure 1 As shown, a joist is arranged under the track beam as a support platform for the track beam. Common structural forms of joists include simply supported beams, continuous beams, continuous rigid frames, etc. When the span is larger, a cable-stayed bridge is required. Since the track beam in this structure does not participate in the overall force, the composite structure of the bridge is relatively high, and the height of the joist increases rapidly with the increase of the span, which is relatively heavy as a whole. Moreover, since crossing large rivers is often controlled by restrictions such as the navigation clearance under the bridge or the hundred-year water level, the height of the bridge structure is relatively high when beam-on-beam is used, which will raise the overall track surface elevation of the line, increase the project cost, and have a poor landscape. Summary of the invention

[0003] The purpose of the present invention is to overcome the problems of high engineering cost and poor landscape of the existing straddle-type monorail bridge adopting a beam-on-beam structure.

[0004] To this end, the present invention provides a single-cable-plane large-span bridge structure suitable for a straddle-type monorail, comprising two relatively arranged track beams, a bridge tower located between the two track beams, and a cable-stayed cable; the bridge tower comprises an upper tower column, a lower tower column, and a bridge tower crossbeam located between the upper tower column and the lower tower column, the two track beams are respectively located on the transverse ends of the bridge tower crossbeam, the two track beams are connected by longitudinal and transverse connecting beam structural members, the cable-stayed cable is a single-cable-plane cable, and is located between the two track beams, one end of the cable-stayed cable is anchored and fixed to the longitudinal and transverse connecting beam structural members, and the other end is fixedly connected to the upper tower column.

[0005] Furthermore, the longitudinal and transverse connecting beam structure includes transverse beams arranged at intervals along the bridge direction, and longitudinal beams arranged between two adjacent transverse beams; the two ends of the transverse beam are respectively connected to the two track beams, and the ends of the inclined cables are anchored on the transverse beams.

[0006] Furthermore, the crossbeams include common crossbeams, anchoring crossbeams and reinforcing crossbeams. The anchoring crossbeams are located at the anchoring position of the ends of the inclined cables, and the reinforcing crossbeams are arranged at positions without inclined cables near both sides of the bridge towers. There are multiple common crossbeams, and the interval between two adjacent common crossbeams is 3 to 5 meters.

[0007] Furthermore, the common crossbeam is an I-beam structure, and the anchoring crossbeam and the reinforcing crossbeam are box-section steel structures.

[0008] Furthermore, a plurality of longitudinal beams are provided between two adjacent transverse beams, and the plurality of longitudinal beams are spaced apart in the transverse direction of the bridge.

[0009] Furthermore, a support pad stone is provided between the track beam and the bridge tower cross beam.

[0010] Compared with the prior art, the present invention has the following beneficial effects:

[0011] (1) The single-cable long-span bridge structure suitable for straddle-type monorail provided by the present invention utilizes the steel track beam itself as a load-bearing structure, adopts longitudinal and transverse connecting beam structural members to strengthen the overall rigidity, and overcomes the limitation of the track beam cross-sectional size on the span. It adopts a cable-stayed bridge structure and utilizes the inclined cable as a vertical support to reduce the calculated bending moment of the track beam, thereby making the bridge have a large span, a small structural height, strong permeability, and a good landscape.

[0012] (2) The single-cable-plane long-span bridge structure provided by the present invention adopts a steel track beam, which has a light structure and a fast construction speed. At the same time, a single-cable-plane inclined cable is used as a vertical support, which fully utilizes the space between the track beams, reduces the bridge deck width, and saves costs.

[0013] The present invention will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic cross-sectional diagram of the upper beam structure of the middle beam of a conventional straddle-type monorail bridge;

[0015] Figure 2 It is a schematic elevational layout diagram of a single-cable-plane long-span bridge structure of the present invention;

[0016] Figure 3 It is a schematic diagram of the plan layout of the single-cable-plane long-span bridge structure of the present invention;

[0017] Figure 4 yes Figure 2 Schematic diagram of the middle section along AA;

[0018] Figure 5 yes Figure 2 Schematic diagram of the cross section along the middle line BB.

[0019] Explanation of the reference numerals: 1. Track beam; 2. Stay cable; 3. Reinforced beam; 4. Lower tower column; 5. Bridge tower beam; 6. Upper tower column; 7. Ordinary beam; 8. Longitudinal beam; 9. Anchor beam; 10. Support pad stone. DETAILED DESCRIPTION

[0020] 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.

[0021] 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.

[0022] like Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, this embodiment provides a single-cable long-span bridge structure suitable for a straddle-type monorail, comprising two track beams 1 arranged opposite to each other, a bridge tower located between the two track beams 1, and a cable-stayed cable 2; wherein the track beam 1 can be made of a steel structure, which is light and has a fast processing speed; the bridge tower comprises an upper tower column 6, a lower tower column 4, and a bridge tower cross beam 5 located between the upper tower column 6 and the lower tower column 4; the two track beams 1 are respectively located at the two ends of the bridge tower cross beam 5 in the transverse direction of the bridge; the track beam 1 is used as the load-bearing structure of the bridge, thereby reducing the beam height; and considering that the straddle-type monorail bridge has strict requirements on the lateral and vertical stiffness, it is difficult to meet the stiffness requirements when only the track beam 1 is used as the main beam In order to solve the problem that the requirements of the bridge structure are met and the structural stress is difficult to meet, in this embodiment, the two track beams 1 are connected by longitudinal and transverse connecting beam structures, and the longitudinal and transverse connecting beam structures are used to strengthen the overall stiffness of the bridge, so that the bridge can meet the stiffness requirements; in addition, one end of the inclined cable 2 is anchored and fixed to the longitudinal and transverse connecting beam structures, and the other end is fixedly connected to the upper tower column 6, which overcomes the limitation of the cross-sectional size of the track beam 1 on the span, and uses the inclined cable 2 as a vertical support to reduce the calculated bending moment of the track beam 1, wherein the inclined cable 2 adopts a single cable plane and is located between the two track beams 1, making full use of the space between the track beams 1, reducing the width of the bridge deck, and saving costs. The bridge structure designed in this embodiment has a large span, a small structural height, strong permeability, and good landscape.

[0023] A support pedestal 10 is arranged between the track beam 1 and the bridge tower cross beam 5 to further reduce the cross-sectional bending moment of the track beam 1 .

[0024] Refine the structure of the longitudinal and transverse connecting beams, such as Figure 2 and Figure 3 As shown, the longitudinal and transverse connecting beam structure includes transverse beams arranged at intervals along the bridge direction, and a longitudinal beam 8 arranged between two adjacent transverse beams; the two ends of the transverse beam are respectively connected to the two track beams 1, and the two track beams are connected by the criss-crossing longitudinal beams 8 and transverse beams, which strengthens the overall connection stiffness between the two track beams 1, thereby ensuring the overall stiffness requirement of the bridge when only the track beam 1 is used as the main beam, and the end of the inclined cable 2 is anchored on the transverse beam.

[0025] Specifically, the cross beams include common cross beams 7, anchoring cross beams 9 and reinforcing cross beams 3, wherein there are multiple common cross beams 7 which are densely arranged, and the spacing between two adjacent common cross beams 7 is 3 to 5 meters, and the spacing between the anchoring cross beams 9 and the reinforcing cross beams 3 is larger. The anchoring cross beams 9 are determined according to the position of the inclined cable 2 and are used to anchor the inclined cable 2. They are generally located at the anchoring position at the end of the inclined cable 2 and can be appropriately supplemented and encrypted as needed. The reinforcing cross beams 3 are arranged at positions where there are no inclined cables 2 on both sides of the bridge tower; further, the common cross beams 7 are I-beam structures, and the anchoring cross beams 9 and the reinforcing cross beams 3 are both box-section steel structures. By arranging beams of different structural designs at different stress-bearing point positions, the overall rigidity of the beam body is strengthened while the stress on the beam structure is also ensured.

[0026] When the distance between two track beams 1 is relatively large, a plurality of longitudinal beams 8 may be provided between two adjacent transverse beams, and the plurality of longitudinal beams 8 may be spaced apart along the transverse direction of the bridge to increase the overall structural rigidity of the bridge.

[0027] In addition, the bridge tower in the single-cable-plane large-span bridge structure of the present embodiment can adopt a single-tower, double-tower or three-tower cable-stayed bridge structure as required.

[0028] The above examples are merely illustrative of the present invention and do not constitute a limitation on the protection scope of the present invention. All designs that are the same or similar to the present invention fall within the protection scope of the present invention.

Claims

1. A single-cable long-span bridge structure suitable for straddle-type monorail, characterized in that: It comprises two track beams arranged opposite to each other, a bridge tower located between the two track beams, and a cable-stayed cable; the bridge tower comprises an upper tower column, a lower tower column, and a bridge tower cross beam located between the upper tower column and the lower tower column, the two track beams are respectively located at the two ends of the bridge tower cross beam in the transverse direction of the bridge, the two track beams are connected by a longitudinal and transverse connecting beam structure, the cable-stayed cable is a single cable plane, located between the two track beams, one end of the cable-stayed cable is anchored and fixed to the longitudinal and transverse connecting beam structure, and the other end is fixedly connected to the upper tower column; The longitudinal and transverse connecting beam structural members include transverse beams arranged at intervals along the longitudinal direction of the bridge, and longitudinal beams arranged between two adjacent transverse beams; the two ends of the transverse beams are respectively connected to two track beams, and the ends of the inclined cables are anchored on the transverse beams; the transverse beams include ordinary transverse beams, anchoring transverse beams and reinforced transverse beams, the anchoring transverse beams are located at the anchoring position of the ends of the inclined cables, and the reinforced transverse beams are arranged at positions without inclined cables near both sides of the bridge towers, there are multiple ordinary transverse beams, and the spacing between two adjacent ordinary transverse beams is 3 to 5 meters; multiple longitudinal beams are arranged between two adjacent transverse beams, and the multiple longitudinal beams are arranged at intervals along the transverse direction of the bridge.

2. A single-cable-plane long-span bridge structure suitable for straddle-type monorail according to claim 1, characterized in that: The common cross beam is an I-beam structure, and the anchoring cross beam and the reinforcing cross beam are box-section steel structures.

3. A single-cable-plane long-span bridge structure suitable for straddle-type monorail according to claim 1, characterized in that: A support pad stone is arranged between the track beam and the bridge tower cross beam.

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