阅读说明：本技术 一种适用于跨座式单轨的单索面大跨桥梁结构 (Single-cable-surface large-span bridge structure suitable for straddle type monorail ) 是由 彭华春 李靖 文望青 瞿国钊 马明 李元俊 陈名欢 刘阳明 林骋 田芳 刘巧丽 于 2020-05-29 设计创作，主要内容包括：本发明提供了一种适用于跨座式单轨的单索面大跨桥梁结构,包括两个相对设置的轨道梁,位于两个轨道梁之间的桥塔,以及斜拉索；桥塔包括上塔柱、下塔柱及位于上塔柱和下塔柱之间的桥塔横梁,两个轨道梁分别位于桥塔横梁的横桥向两端上,两个轨道梁之间通过纵横向联系梁结构件连接,斜拉索为单索面,位于两个轨道梁之间,斜拉索的一端与纵横向联系梁结构件锚接固定,另一端与上塔柱固定连接。该桥梁结构利用钢轨道梁自身作为承重结构,采用纵横向联系梁结构件加强整体刚度,并克服轨道梁截面尺寸对跨度的限制,采用斜拉桥结构,利用斜拉索作为竖向支撑,减小轨道梁的计算弯矩,使得桥梁跨度大,结构高度小,通透性强,景观好。(The invention provides a single-cable-surface large-span bridge structure suitable for a straddle type monorail, which comprises two oppositely arranged track beams, a bridge tower positioned between the two track beams and a stay cable, wherein the two track beams are arranged in parallel; the bridge tower comprises an upper tower column, a lower tower column and a bridge tower cross beam positioned between the upper tower column and the lower tower column, wherein the two track beams are respectively positioned at the two ends of the bridge tower cross beam in the transverse direction of a bridge, the two track beams are connected through a longitudinal and transverse connecting beam structural part, the stay cable is a single cable surface and is positioned between the two track beams, one end of the stay cable is fixedly anchored with the longitudinal and transverse connecting beam structural part, and the other end of the stay cable is fixedly connected with the upper tower column. This bridge construction utilizes steel track roof beam self as load-carrying members, adopts to indulge horizontal tie beam structure spare and strengthens the bulk rigidity to overcome the restriction of track roof beam cross sectional dimension to the span, adopt cable-stay bridge structure, utilize the suspension cable as vertical braces, reduce the calculation moment of flexure of track roof beam, make the bridge span big, the structure height is little, and the permeability is strong, and the view is good.)

1. The utility model provides a single-cable-face large-span bridge structure suitable for stride a formula single track which characterized in that: the system comprises two oppositely arranged track beams, a bridge tower positioned between the two track beams and a stay 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 located at two ends of a transverse bridge of the bridge tower cross beam respectively and are connected through longitudinal and transverse connecting beam structural parts, the stay cable is a single cable surface and is located between the two track beams, one end of the stay cable is fixedly anchored with the longitudinal and transverse connecting beam structural parts, and the other end of the stay cable is fixedly connected with the upper tower column.

2. A single-deck long-span bridge structure suitable for a straddle-type monorail according to claim 1, wherein: the longitudinal and transverse connecting beam structural part comprises cross beams arranged at intervals along the bridge direction and longitudinal beams arranged between two adjacent cross beams; the two ends of the cross beam are respectively connected with the two track beams, and the end parts of the stay cables are anchored on the cross beam.

3. A single-deck long-span bridge structure suitable for a straddle-type monorail according to claim 2, wherein: the crossbeam includes ordinary crossbeam, anchor crossbeam and strengthening beam, the anchor crossbeam is located the anchor position of suspension cable tip, strengthening beam sets up in being close to bridge tower both sides and does not have the suspension cable position, ordinary crossbeam is a plurality of, and interval 3 ~ 5 meters between two adjacent ordinary crossbeams.

4. A single-deck long-span bridge structure suitable for a straddle-type monorail according to claim 3, wherein: the common cross beam is of an I-shaped steel structure, and the anchoring cross beam and the reinforcing cross beam are of box-shaped section steel structures.

5. A single-deck long-span bridge structure suitable for a straddle-type monorail according to claim 2, wherein: a plurality of longitudinal beams are arranged between every two adjacent transverse beams and are arranged at intervals along the transverse bridge direction.

6. A single-deck long-span bridge structure suitable for a straddle-type monorail according to claim 1, wherein: and a support cushion stone is arranged between the track beam and the bridge tower cross beam.

Technical Field

The invention belongs to the technical field of rail transit bridge structures, and particularly relates to a single-cable-surface long-span bridge structure suitable for a straddle type monorail.

Background

The cross section of the straddle type monorail track beam is small in size, the span is limited, when the span is large, an upper beam structure is generally adopted, as shown in figure 1, namely, a joist is arranged below the track beam to serve as a track beam supporting platform, the structural form of the common joist comprises a simple joist, a continuous rigid frame and the like, when the span is large, a cable-stayed bridge is required, and because the track beam does not participate in integral stress in the structure, the bridge combined structure is high, and the height of the joist is rapidly increased along with the increase of the span, the whole body is heavy; and because the large river strides is often controlled by the restriction such as the navigation headroom under the bridge or the hundred-year water level, the height of the bridge structure is higher when the beam is arranged on the beam, the integral rail surface elevation of the line can be raised, the construction cost is increased, and the landscape is poorer.

Disclosure of Invention

The invention aims to solve the problems of high construction cost and poor landscape of the existing straddle type monorail bridge adopting a beam-on-beam structure.

Therefore, the invention provides a single-cable-surface large-span bridge structure suitable for a straddle type monorail, which comprises two oppositely arranged track beams, a bridge tower positioned between the two track beams and a stay cable, wherein the two track beams are arranged in a staggered mode; 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 located at two ends of a transverse bridge of the bridge tower cross beam respectively and are connected through longitudinal and transverse connecting beam structural parts, the stay cable is a single cable surface and is located between the two track beams, one end of the stay cable is fixedly anchored with the longitudinal and transverse connecting beam structural parts, and the other end of the stay cable is fixedly connected with the upper tower column.

Furthermore, the longitudinal and transverse connecting beam structural part comprises cross beams arranged at intervals along the bridge direction and longitudinal beams arranged between two adjacent cross beams; the two ends of the cross beam are respectively connected with the two track beams, and the end parts of the stay cables are anchored on the cross beam.

Further, the crossbeam includes ordinary crossbeam, anchor crossbeam and web beam, the anchor crossbeam is located the anchor position of suspension cable tip, web beam sets up in being close to bridge tower both sides and does not have the suspension cable position, ordinary crossbeam is a plurality of, and interval 3 ~ 5 meters between two adjacent ordinary crossbeams.

Furthermore, the common cross beam is of an I-shaped steel structure, and the anchoring cross beam and the reinforcing cross beam are of box-shaped section steel structures.

Furthermore, a plurality of longitudinal beams are arranged between every two adjacent cross beams and are arranged at intervals along the transverse bridge direction.

Furthermore, a support cushion stone is arranged between the track beam and the bridge tower cross beam.

Compared with the prior art, the invention has the beneficial effects that:

(1) the single-cable-surface large-span bridge structure suitable for the straddle type monorail, provided by the invention, utilizes the steel track beam as a bearing structure, adopts the longitudinal and transverse connecting beam structural part to strengthen the integral rigidity, overcomes the limitation of the cross-sectional dimension of the track beam on the span, adopts the cable-stayed bridge structure, utilizes the stay cable as a vertical support, reduces the calculated bending moment of the track beam, and ensures that the bridge has large span, small structural height, strong permeability and good landscape.

(2) The single-cable-plane long-span bridge structure provided by the invention adopts the steel structure track beam, the structure is light and handy, the construction speed is high, meanwhile, the single-cable-plane stay cable is adopted for vertical support, the space between the track beams is fully utilized, the width of the bridge deck is reduced, and the cost is saved.

The present invention will be described in further detail below with reference to the accompanying drawings.

Drawings

FIG. 1 is a schematic cross-sectional view of an upper beam structure of a middle beam of a conventional straddle-type monorail bridge;

FIG. 2 is a schematic view of the vertical arrangement of the single-deck long-span bridge structure of the present invention;

FIG. 3 is a schematic plan view of a single deck long span bridge construction of the present invention;

FIG. 4 is a schematic cross-sectional view taken along line A-A of FIG. 2;

fig. 5 is a schematic cross-sectional view taken along line B-B in fig. 2.

Description of reference numerals: 1. a track beam; 2. a stay cable; 3. a reinforcing cross beam; 4. lowering the tower column; 5. a bridge tower beam; 6. mounting the tower column; 7. a common cross beam; 8. a stringer; 9. anchoring the cross beam; 10. and (5) supporting base cushion stones.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention; in the description of the present invention, "a plurality" means two or more unless otherwise specified.

As shown in fig. 2, 3, 4 and 5, the present embodiment provides a single-cable-surface large-span bridge structure suitable for a straddle-type monorail, which includes two oppositely-arranged track beams 1, a bridge tower located between the two track beams 1, and a stay cable 2; the bridge tower comprises an upper tower column 6, a lower tower column 4 and a bridge tower cross beam 5 positioned between the upper tower column 6 and the lower tower column 4, the two track beams 1 are respectively positioned at two ends of the bridge tower cross beam 5 in the transverse bridge direction, the track beams 1 are used as a bearing structure of the bridge, the beam height is reduced, the problems that the requirements of a straddle-type single-track bridge on transverse rigidity and vertical rigidity are strict, the rigidity requirements are difficult to meet only by using the track beams 1 as main beams, and the structural stress is difficult to meet are solved, in the embodiment, the two track beams 1 are connected through longitudinal and transverse connecting beam structural members, and the overall rigidity of the bridge is enhanced by using the longitudinal and transverse connecting beam structural members, so that the bridge can meet the rigidity requirements; in addition, one end of the stay cable 2 is fixedly anchored with the longitudinal and transverse connecting beam structural part, the other end of the stay cable is fixedly connected with the upper tower column 6, the limitation of the cross-sectional size of the track beam 1 on the span is overcome, the stay cable 2 is used as a vertical support, the calculation bending moment of the track beam 1 is reduced, the stay cable 2 adopts a single cable surface and is positioned between the two track beams 1, the space between the track beams 1 is fully utilized, the width of a bridge deck is reduced, and the cost is saved. The bridge structure designed by the embodiment has the advantages of large bridge span, small structure height, strong permeability and good landscape.

And a support base stone 10 is arranged between the track beam 1 and the bridge tower cross beam 5, so that the section bending moment of the track beam 1 is further reduced.

The structure of the longitudinal and transverse connection beam structural part is refined, and as shown in fig. 2 and 3, the longitudinal and transverse connection beam structural part comprises cross beams which are arranged at intervals along the bridge direction, and longitudinal beams 8 which are arranged between every two adjacent cross beams; the two ends of the cross beam are respectively connected with the two track beams 1, the longitudinal beams 8 and the cross beam which are arranged in a criss-cross mode are connected with the two track beams, the overall connection rigidity between the two track beams 1 is enhanced, the overall rigidity requirement of the bridge when only the track beams 1 are adopted as main beams is guaranteed, and the end portions of the stay cables 2 are anchored on the cross beam.

Specifically, the cross beams comprise a plurality of common cross beams 7, anchoring cross beams 9 and reinforcing cross beams 3, wherein the common cross beams 7 are arranged densely, the distance between every two adjacent common cross beams 7 is 3-5 m, the distance between each anchoring cross beam 9 and each reinforcing cross beam 3 is large, the anchoring cross beams 9 are determined according to the positions of the stay cables 2 and are used for anchoring the stay cables 2 and are generally positioned at the anchoring positions of the end parts of the stay cables 2, the reinforcement cross beams 3 can be properly supplemented and encrypted as required, and the reinforcing cross beams 3 are arranged at positions close to the two sides of the bridge tower without the stay cables 2; furthermore, the common cross beam 7 is of an I-shaped steel structure, the anchoring cross beam 9 and the reinforcing cross beam 3 are of a box-shaped section steel structure, cross beams with different structural designs are arranged at different stress points, and the overall rigidity of the reinforcing beam body is ensured while the stress of the beam body structure is ensured.

And when the distance between two track beams 1 is large, a plurality of longitudinal beams 8 can be arranged between two adjacent transverse beams, and the longitudinal beams 8 are arranged at intervals along the transverse bridge direction to increase the integral structural rigidity of the bridge.

In addition, the bridge tower in the single-cable-surface long-span bridge structure of the embodiment can adopt a single-tower, double-tower or three-tower cable-stayed bridge structure as required.

The above examples are merely illustrative of the present invention and should not be construed as limiting the scope of the invention, which is intended to be covered by the claims and any design similar or equivalent to the scope of the invention.