阅读说明：本技术 一种公铁同层偏载布置桥塔中穿主梁的斜拉桥 (Cable-stayed bridge with main beams penetrating through bridge towers arranged on same-layer road and railway in offset load mode ) 是由 曾敏 严爱国 文望青 郭安娜 王鹏宇 李桂林 崔苗苗 黄振 史娣 尹书军 张晓江 于 2018-06-15 设计创作，主要内容包括：本发明公开了一种公铁同层偏载布置桥塔中穿主梁的斜拉桥,包括主梁、沿主梁顺桥向布置的多个桥塔、以及用于连接所述桥塔与主梁横桥向两侧的多根的斜拉索,所述主梁包括用于布置第一公路的纵横格构梁,所述纵横格构梁的横桥向两侧分别设置有用于布置铁路的第一钢箱边梁和用于布置第二公路的第二钢箱边梁,所述纵横格构梁与第一钢箱边梁、第二钢箱边梁均通过螺栓拼接。本发明的主梁采用不对称布置形式,相比分层布置线路标高小,相比于同层对称布置改善了公路铁路的接线条件,节省空间和匝道设置,可节约工程投资,且视野开阔。(The invention discloses a cable-stayed bridge with a main beam penetrating through bridge towers arranged on the same highway and railway layer in an unbalanced load manner, which comprises the main beam, a plurality of bridge towers arranged along the bridge direction of the main beam and a plurality of stay cables used for connecting the bridge towers and the two sides of the main beam in the transverse bridge direction, wherein the main beam comprises a longitudinal and transverse lattice beam used for arranging a first highway, the two sides of the longitudinal and transverse lattice beam in the transverse bridge direction are respectively provided with a first steel box side beam used for arranging a railway and a second steel box side beam used for arranging a second highway, and the longitudinal and transverse lattice beam, the first steel box side beam and the second steel box side beam are spliced through bolts. The main beam adopts an asymmetric arrangement form, has higher height compared with a layered arrangement of line signs, improves the wiring condition of roads and railways compared with a same-layer symmetric arrangement, saves space and ramp arrangement, can save engineering investment, and has wide visual field.)

1. The utility model provides a highway railway is with layer unbalance loading arranges cable-stay bridge of wearing girder in bridge tower, includes girder (1), along girder (1) along a plurality of bridge towers (2) that the bridge was arranged to the bridge direction and be used for connecting bridge tower (2) and girder (1) cross bridge are to stay cable (3) of many of both sides, its characterized in that: girder (1) is including the horizontal and vertical lattice roof beam (4) that is located the middle part and is used for arranging first highway, the horizontal bridge of horizontal and vertical lattice roof beam (4) is provided with first steel case boundary beam (5) that are used for arranging the railway and second steel case boundary beam (6) that are used for arranging the second highway respectively to both sides, horizontal and vertical lattice roof beam (4) all splice through the bolt with first steel case boundary beam (5), second steel case boundary beam (6).

2. The cable-stayed bridge with the main beams penetrating through the bridge towers in the same-layer unbalance loading arrangement of the roads and the railways according to claim 1, which is characterized in that: the longitudinal and transverse lattice beams (4) comprise a plurality of vertical cross-connected longitudinal beams (4.1) and box-type cross beams (4.2), transverse ribs (4.3) are further arranged between every two adjacent longitudinal beams (4.1), the transverse ribs (4.3) are vertically and cross-connected with the longitudinal beams (4.1), and orthotropic bridge decks (4.4) are laid on the top surfaces of the longitudinal and transverse lattice beams (4).

3. The cable-stayed bridge with the main beams penetrating through the bridge towers in the same-layer unbalance loading arrangement of the roads and the railways according to claim 2, characterized in that: the first steel box boundary beam (5) and the second steel box boundary beam (6) have the same structure; the first steel box edge beam (5) and the second steel box edge beam (6) respectively comprise a top plate (5.1) and a bottom plate (5.2) which are arranged along the bridge direction, an inner web (5.3) and an outer web (5.4) are arranged between the top plate (5.1) and the bottom plate (5.2), and the end parts of the top plate (5.1), the inner web (5.3), the bottom plate (5.2) and the outer web (5.4) are welded in sequence to form a box-type structure; a plurality of diaphragm plates (5.5) arranged along the transverse bridge direction are arranged between the inner web plate (5.3) and the outer web plate (5.4).

4. The cable-stayed bridge with the main beams penetrating through the bridge towers in the same-layer unbalance loading arrangement of the roads and the railways according to claim 3, characterized in that: the outside of outer web (5.4) is provided with tuyere (5.6), the lateral wall of one side of tuyere (5.6) and the lateral wall laminating of outer web (5.4) mutually.

5. The cable-stayed bridge with the main beams penetrating through the bridge towers in the same-layer unbalance loading arrangement of the roads and the railways according to claim 4, characterized in that: and an anchoring structure (5.7) for anchoring the stay cable is arranged above the outer web plate (5.4).

6. The cable-stayed bridge with the main beams penetrating through the bridge towers in the same-layer unbalance loading arrangement of the roads and the railways according to claim 3, 4 or 5, characterized in that: and reinforcing ribs (5.8) are welded on the inner side surfaces of the top plate (5.1), the bottom plate (5.2), the inner web plate (5.3) and the outer web plate (5.4).

7. The cable-stayed bridge with the main beams penetrating through the bridge towers in the same-layer unbalance loading arrangement of the roads and the railways according to claim 5, characterized in that: bridge tower (2) are located the middle part of girder (1), bridge tower (2) are including king-post (2.1), well king-post (2.2) and king-post (2.3), well king-post (2.2) are located between king-post (2.1) and king-post (2.3), every king-post (2.2) are including two horizontal bridge to the mast of mutual disposition, two the mast passes and lower king-post (2.3) fixed connection from the space department of reserving between vertical and horizontal lattice beam (4) and first steel case boundary beam (5), second steel case boundary beam (6) respectively.

8. The cable-stayed bridge with the main beams penetrating through the bridge towers in the same-layer unbalance loading arrangement of the roads and the railways according to claim 7, characterized in that: the lower tower column (2.3) comprises two tower limbs which are oppositely arranged in the transverse bridge direction, and a lower cross beam (2.4) is arranged between the two tower limbs.

9. The cable-stayed bridge with the main beams penetrating through the bridge towers in the same-layer unbalance loading arrangement of the roads and the railways according to claim 8, characterized in that: and bracket beams (2.5) used for bearing the first steel box boundary beam (5) and the second steel box boundary beam (6) are respectively arranged on the transverse outer sides of the lower tower columns (2.3).

10. The cable-stayed bridge with the main beams penetrating through the bridge towers in the same-layer unbalance loading arrangement of the roads and the railways according to claim 7, 8 or 9, which is characterized in that: and the two transverse sides of the upper tower column (2.1) are fixedly connected with corresponding anchoring structures (5.7) through stay cables (3) respectively.

Technical Field

The invention belongs to the technical field of bridge engineering, and particularly relates to a cable-stayed bridge with a main beam penetrating through a bridge tower in a way that roads and railways are arranged in a same-layer offset load manner.

Background

At present, the bridge floor arrangement form that the layer was arranged is adopted mostly to cable-stay bridge that domestic highway railway was built jointly, and chinese utility model patent like application number 201720395421.8 discloses a bridge arrangement structure that public rail was built jointly, including highway girder, highway girder's central authorities division strip department is provided with a plurality of pier along highway girder extending direction interval, the top of pier is erect and is used for supplying the current track of track traffic vehicle. According to the bridge arrangement structure built by the public rails together, the idle space of the central dividing strips of the highway main beams is utilized to set the piers, the rails are erected on the piers to arrange upper-layer rail traffic, although the width of a bridge deck caused by the dividing strips can be reduced, the rail traffic load is relatively small, the arrangement mode improves the elevation of the bridge deck, and the length of approach bridges is increased.

Along with the continuous development and the technological progress of national highway and railway construction, and the enthusiasm of constructing railways and highway-railway co-constructed bridges in each province and city is high, the quantity of highway-railway co-constructed bridges is continuously increased, the railway load is placed in the middle, the highway load distribution also has application in the same-layer symmetrical arrangement form of two sides, for example, the Chinese utility model with the application number of 201711374882.8 discloses a highway-railway dual-purpose bridge flat-layer girder section structure, which comprises a railway girder, two sides of which are respectively connected with a left highway girder and a right highway girder, the top surface of the railway girder and the top surfaces of the left highway girder and the right highway girder are positioned on the same plane, highway-railway parallel separation belts between the railway girder and the left highway girder and the right highway girder are respectively provided with an anchoring system, the anchoring systems are used for connecting stay cables, the railway girder and the left highway girder and the right highway girder respectively comprise a plurality of. In the scheme, the inclined stay cables are connected to the two sides of the railway main beam instead of the two sides of the whole highway-railway main beam by applying the main beam section structure, so that the bending moment of the main beam is reduced, but the width of a bridge deck is increased for improving torsional rigidity and wind resistance, the transverse stress is large, the requirement on the stability of the structure is high, and the utilization rate of materials is not high. In addition, in the middle of the railway load is placed in the scheme, the highway loads are distributed on the two sides in the same-layer symmetrical arrangement mode, intersection can occur in the wiring of the highway and the railway at the bridge head, the wiring is complex, a large space field is needed, and the space utilization rate is low.

Disclosure of Invention

The invention aims to solve the defects in the prior art and provide the cable-stayed bridge with reasonable stress, stable structure and high space utilization rate, wherein the main beam penetrates through the bridge tower arranged on the same layer of the highway and railway in an offset load way.

In order to achieve the purpose, the invention adopts the technical scheme that: the utility model provides a highway railway is with layer unbalance loading arrange cable-stay bridge of wearing girder in bridge tower, includes the girder, follows the girder in the same layer a plurality of bridge towers that the bridge tower was arranged to the bridge direction and be used for connecting the bridge tower is with the many suspension cables of girder crossbridge to both sides, the girder is including lieing in the middle part and being used for arranging the vertical and horizontal lattice roof beam of first highway, the crossbridge of vertical and horizontal lattice roof beam is provided with the first steel case boundary beam that is used for arranging the railway and is used for arranging the second steel case boundary beam of second highway respectively to both sides, vertical and horizontal lattice roof beam all splices through the bolt with first steel case boundary beam, second steel case boundary beam.

In the technical scheme, the longitudinal and transverse lattice beams comprise a plurality of vertical cross-connected longitudinal beams and box-shaped cross beams, transverse ribs are further arranged between every two adjacent longitudinal beams, the transverse ribs are vertically and cross-connected with the longitudinal beams, and orthotropic bridge decks are laid on the top surfaces of the longitudinal and transverse lattice beams.

In the technical scheme, the first steel box boundary beam and the second steel box boundary beam have the same structure; the first steel box edge beam and the second steel box edge beam respectively comprise a top plate and a bottom plate which are arranged along the bridge direction, an inner web and an outer web are arranged between the top plate and the bottom plate, and the end parts of the top plate, the inner web, the bottom plate and the outer web are welded in sequence to form a box-type structure; and a plurality of transverse clapboards arranged along the transverse bridge direction are arranged between the inner web plate and the outer web plate.

In the technical scheme, the outer side of the outer web plate is provided with the air nozzle, and one side wall of the air nozzle is attached to the outer side wall of the outer web plate.

In the technical scheme, an anchoring structure for anchoring the stay cable is arranged above the outer web plate.

In the technical scheme, the inner side surfaces of the top plate, the bottom plate, the inner web plate and the outer web plate are welded with reinforcing ribs.

In the technical scheme, the bridge tower is located in the middle of the main beam and comprises an upper tower column, a middle tower column and a lower tower column, the middle tower column is located between the upper tower column and the lower tower column, each middle tower column comprises two tower poles which are arranged transversely and oppositely, and the two tower poles penetrate through reserved gaps between the longitudinal and transverse lattice beams and between the first steel box side beams and between the longitudinal and transverse lattice beams and between the first steel box side beams and between the second steel box side beams and are fixedly connected with the lower tower column.

In the above technical scheme, the lower tower column comprises two tower limbs which are oppositely arranged in the transverse bridge direction, and a lower cross beam is arranged between the two tower limbs.

In the technical scheme, the horizontal outer side of the lower tower column is respectively provided with a bracket beam used for bearing the first steel box boundary beam and the second steel box boundary beam.

In the above technical scheme, the two transverse sides of the upper tower column are respectively fixedly connected with the corresponding anchoring structures through stay cables.

The invention has the beneficial effects that:

firstly, compared with the line signs arranged in a layered mode, the highway and railway same-layer main beam bridge deck adopts an asymmetric arrangement mode, the height of the highway and railway same-layer main beam bridge deck is smaller, compared with the same-layer symmetric arrangement, the wiring condition of a highway and a railway is improved, the stress of the system is reasonable under the action of unbalance loading, the number of foundations is reduced, the space and the ramp arrangement are saved, the economic index is better, and the highway and railway combined-construction bridge deck arrangement mode is worthy of popularization.

Secondly, the split type double-box girder structure is adopted, three parts of the girder are independently formed, compared with an integral steel box girder, the full-scale manufacturing is convenient, the girder is convenient to manufacture, transport and install, the construction speed is high, the construction site welding is avoided, the construction precision and quality are guaranteed, the engineering investment can be saved, the visual field is wide, the integral performance is good, the torsional rigidity is high, compared with the integral steel box girder, the steel consumption is saved, and the manufacturing cost is reduced.

Thirdly, the stayed cables on two sides of the highway and the railway adopt different specifications and initial tensions, balance the unbalance loading effect under constant load and live load, and have reasonable structural stress.

Fourthly, the structural form of the main beam penetrating through the bridge tower reduces the material and construction cost of the foundation construction of the bridge tower under the condition of not increasing the width of the bridge deck.

Fifthly, the cable-stayed bridge has good attractive effect, light and soft structure, can be perfectly combined with the surrounding environment, and has remarkable social benefit.

Drawings

FIG. 1 is a schematic structural view of a cable-stayed bridge with a main beam penetrating through a bridge tower arranged in a way of unbalance loading on the same layer of highway and railway in the invention;

FIG. 2 is a cross-sectional structural view of the main beam of FIG. 1;

FIG. 3 is a schematic view of the structure of FIG. 2 taken along the direction I-I;

in the figure: 1-main beam, 2-bridge tower (2.1-upper tower column, 2.2-middle tower column, 2.3-lower tower column), 3-stay cable, 4-longitudinal and transverse lattice beam (4.1-longitudinal beam, 4.2-box type cross beam, 4.3-transverse rib, 4.4-orthotropic bridge deck), 5-first steel box side beam (5.1-top plate, 5.2-bottom plate, 5.3-inner web, 5.4-outer web, 5.5-transverse clapboard, 5.6-tuyere, 5.7-anchoring structure), 6-second steel box side beam.

Detailed Description

The invention will be further described in detail with reference to the following drawings and specific examples, which are not intended to limit the invention, but are for clear understanding.

The cable-stayed bridge with the main beams penetrating through the bridge towers in the highway-railway same-layer unbalanced load arrangement shown in the figure 1 comprises a main beam 1, a plurality of bridge towers 2 arranged along the bridge direction of the main beam 1 and a plurality of stay cables 3 used for connecting the bridge towers 2 and the two sides of the main beam 1 in the transverse bridge direction, wherein the main beam 1 comprises a longitudinal and transverse lattice beam 4 located in the middle and used for arranging a first road, a first steel box side beam 5 used for arranging a railway and a second steel box side beam 6 used for arranging a second road are respectively arranged on the two sides of the longitudinal and transverse lattice beam 4 in the transverse bridge direction, the three parts of the main beam are respectively manufactured in a factory, the first steel box side beam 5 and the second steel box side beam 6 are bolted on site after being transported to a construction site, and then are assembled by adopting single cantilevers. Like this, adopt the two case girder structures of disconnect-type of first steel case boundary beam 5, second steel case boundary beam 6, the antitorque commentaries on classics rigidity is big, and wind resistance can be good, and the steel utilization ratio is high. The girder falls into three relatively independent part, compares in whole steel box girder, and the full batch production of being convenient for is made and is transported, avoids the building site to weld, guarantees construction precision and quality. The stay cables on two sides of the highway and the railway adopt different specifications and initial tensions, the unbalance loading effect under the constant load and the live load is balanced, and the structural stress is reasonable.

Among the above-mentioned technical scheme, the bridge tower 2 is located the middle part of girder 1, and bridge tower 2 adopts automatic hydraulic pressure creeping formwork system segmentation construction. The bridge tower 2 comprises an upper tower column 2.1, a middle tower column 2.2 and a lower tower column 2.3, wherein the middle tower column 2.2 is positioned between the upper tower column 2.1 and the lower tower column 2.3, each middle tower column 2.2 comprises two tower poles which are arranged oppositely in the transverse bridge direction, and the two tower poles respectively penetrate through a reserved gap between the longitudinal and transverse lattice beam 4 and the first steel box boundary beam 5 and the second steel box boundary beam 6 to be fixedly connected with the lower tower column 2.3. The lower tower column 2.3 comprises two tower limbs which are oppositely arranged in the transverse bridge direction, a lower cross beam 2.4 is arranged between the two tower limbs, and the horizontal outer side of the lower tower column 2.3 is respectively provided with a bracket beam 2.5 which is used for bearing a first steel box boundary beam 5 and a second steel box boundary beam 6. Therefore, the highway and railway are arranged in different layers symmetrically, the cable-stayed bridge with the main beam penetrating through the bridge tower improves the wiring condition of highway and railway combined construction, the structural system is stressed reasonably under the action of unbalance loading, the number of foundations is reduced, the main beam is convenient to manufacture, transport and install, the construction speed is high, and the economic index is better.

As shown in fig. 2 and 3, the longitudinal and transverse lattice beams 4 comprise a plurality of vertical cross-connected longitudinal beams 4.1 and box-type cross beams 4.2, transverse ribs 4.3 are further arranged between two adjacent longitudinal beams 4.1, the transverse ribs 4.3 are vertically cross-connected with the longitudinal beams 4.1, and orthotropic bridge decks 4.4 are laid on the top surfaces of the longitudinal and transverse lattice beams 4. The first steel box boundary beam 5 and the second steel box boundary beam 6 have the same structure; first steel case boundary beam 5 and second steel case boundary beam 6 all include along roof 5.1 and bottom plate 5.2 along arranging along the bridge to, be provided with interior web 5.3 and outer web 5.4 between roof 5.1 and the bottom plate 5.2, roof 5.1, interior web 5.3, bottom plate 5.2, the tip of outer web 5.4 welds in proper order and forms the box structure, roof 5.1, bottom plate 5.2, interior web 5.3, the medial surface of outer web 5.4 all welds reinforcing rib 5.8. A plurality of diaphragm plates 5.5 arranged along the transverse bridge direction are arranged between the inner web plate 5.3 and the outer web plate 5.4. The outer side of the outer web 5.4 is provided with a tuyere 5.6, and one side wall of the tuyere 5.6 is attached to the outer side wall of the outer web 5.4. An anchoring structure 5.7 for anchoring a stay cable is arranged above the outer web 5.4, and the two transverse sides of the upper tower column 2.1 are fixedly connected with the corresponding anchoring structures 5.7 through the stay cables 3 respectively. Therefore, the invention adopts the arrangement form of the same layer of the highway and the railway, the railway is arranged at one side, the highway is arranged at the other side, the elevation of the highway is reduced, the wiring condition of the highway and railway co-building bridge is improved, the longitudinal and transverse lattice beams 4, the first steel box side beams 5 and the second steel box side beams 6 meet the rationality of the stress of the unbalanced load arrangement structure of the same layer of the highway and the railway, the utilization rate of materials is improved, and the construction quality is ensured. Moreover, under the condition of not increasing the width of the bridge deck, the transverse arrangement form of the bridge tower and the main beam is solved, and the safety, economy and attractiveness of the structure are ensured.

The above description is only for the specific embodiments of the present invention, and it should be noted that the remaining detailed descriptions are related to the prior art, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the protection scope of the present invention.