CN113863114B - Cable-stayed bridge with same-layer asymmetric arrangement of male and female railways - Google Patents
Cable-stayed bridge with same-layer asymmetric arrangement of male and female railways Download PDFInfo
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- CN113863114B CN113863114B CN202111205191.1A CN202111205191A CN113863114B CN 113863114 B CN113863114 B CN 113863114B CN 202111205191 A CN202111205191 A CN 202111205191A CN 113863114 B CN113863114 B CN 113863114B
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- steel box
- bridge
- box girder
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- tower
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D11/00—Suspension or cable-stayed bridges
- E01D11/04—Cable-stayed bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/16—Suspension cables; Cable clamps for suspension cables ; Pre- or post-stressed cables
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2/00—Bridges characterised by the cross-section of their bearing spanning structure
- E01D2/04—Bridges characterised by the cross-section of their bearing spanning structure of the box-girder type
Abstract
The invention relates to a cable-stayed bridge with common-railway same-layer asymmetric arrangement, which comprises: single or multiple bridge towers, main beams, transverse stabilizing cables and a plurality of stay cables for connecting the bridge towers and the main beams, wherein the single or multiple bridge towers, the main beams, the transverse stabilizing cables and the plurality of stay cables are arranged along the longitudinal bridge direction; the girder comprises a first steel box girder for arranging a railway and a second steel box girder for arranging a highway, wherein the constant load on the first steel box girder is larger than that on the second steel box girder, the first steel box girder and the second steel box girder are respectively positioned on two opposite sides of a bridge tower, the length of the first steel box girder along the transverse bridge direction is smaller than that of the second steel box girder along the transverse bridge direction, the distance between the first steel box girder and the bridge tower is a first preset distance, the distance between the second steel box girder and the bridge tower is a second preset distance, and the constant load acting line of the girder is overlapped with the axis of the bridge tower along the transverse bridge direction by adjusting the first preset distance and the second preset distance; therefore, the unbalanced load effect caused by the asymmetric arrangement of the transverse constant load is eliminated, the structure is simple, the stress is clear, and the economy is good.
Description
Technical Field
The invention relates to the field of bridge structures, in particular to a cable-stayed bridge with common-rail same-layer asymmetric arrangement.
Background
At present, because the load of a train is large, the requirements on operation safety and stability are high, the vertical rigidity and the beam end rotation angle are strictly controlled, a cable-stayed bridge with relatively high rigidity is often adopted for a large-span highway-railway dual-purpose bridge, the common form of the cable-stayed bridge arranged on a highway-railway combined construction flat layer is that a railway is arranged in the middle of a box girder, and the roads are symmetrically arranged on two sides of the railway, so that the form is favorable for structural stress and reduces the cost of a main bridge. However, the road connection and the railway are inevitably crossed, the space utilization rate is reduced, the bridge approach cost is increased, the comprehensive investment of the line is possibly increased, and if the railway is arranged on one side and the road is arranged on the other side, the problem of crossing of the road and the railway connection is effectively avoided.
The scheme of the cable-stayed bridge in the related art comprises a main girder, a plurality of middle-penetrating main girder A-shaped bridge towers which are arranged along the main girder along the bridge direction, and a plurality of stay cables which are used for connecting the bridge towers and the main girder transverse bridges to the two sides, wherein the stay cables at the two sides of the highway and the railway adopt different specifications and initial tension for balancing the unbalanced load effect under constant load and balanced unbalanced load effect under active load. However, under the action of horizontal component force of the asymmetric cable force, the main girder and the main tower of the cable-stayed bridge generate horizontal deformation, and the concrete main tower is more obviously deformed under the action of shrinkage creep and second-order effect, so that the structure is more complex, and the economical efficiency is reduced.
Disclosure of Invention
The embodiment of the invention provides a cable-stayed bridge with common-railway same-layer asymmetric arrangement, which aims to solve the problems that a main girder and a main tower of the cable-stayed bridge in the related art are deformed in the transverse direction, the structure is complex and the economical efficiency is reduced.
In a first aspect, there is provided a cable-stayed bridge with common-rail and same-layer asymmetric arrangement, comprising: single or multiple pylons arranged along the longitudinal bridge direction; the main beam comprises a first steel box beam for arranging a railway and a second steel box beam for arranging a highway, wherein the constant load on the first steel box beam is larger than that on the second steel box beam, the first steel box beam and the second steel box beam are respectively positioned on two opposite sides of the bridge tower, the length of the first steel box beam along the transverse bridge direction is smaller than that of the second steel box beam along the transverse bridge direction, the distance between the first steel box beam and the bridge tower is a first preset distance, the distance between the second steel box beam and the bridge tower is a second preset distance, and the constant load acting line of the main beam coincides with the axis of the bridge tower along the transverse bridge direction by adjusting the first preset distance and the second preset distance; and a plurality of stay cables connecting the bridge tower and the girder transverse bridge to two sides.
In some embodiments, the pylon comprises: a lower tower for supporting the cable-stayed bridge; the lower cross beam is fixed at the top of the lower tower column, the first steel box girder and the second steel box girder are arranged on the lower cross beam at intervals along the transverse bridge, and the width of the lower cross beam on one side of the first steel box girder is smaller than that of the lower cross beam on one side of the second steel box girder; and the upper tower column penetrates through a gap between the first steel box girder and the second steel box girder and is fixed with the lower cross beam.
In some embodiments, the pylon further comprises: the two transverse struts are respectively arranged at two opposite ends of the lower transverse beam and are fixed with the lower transverse beam; the plurality of transverse stabilizing cables comprise an upper transverse stabilizing cable and a lower transverse stabilizing cable, one end of the upper transverse stabilizing cable is anchored at the upper part of the upper tower column, the other end of the upper transverse stabilizing cable is connected with the anchoring point of the transverse support, one end of the lower transverse stabilizing cable is connected with the anchoring point of the transverse support, and the other end of the lower transverse stabilizing cable is anchored at the lower tower column.
In some embodiments, a first distance is provided between the anchor point on the side of the first steel box girder and the bridge tower, a second distance is provided between the anchor point on the side of the second steel box girder and the bridge tower, and the first distance is less than the second distance.
In some embodiments, the lower column comprises: the bottom of the lower section of the lower tower column is fixedly provided with a tower seat; the lower tower column upper section, its one end is fixed in the top surface of lower tower column lower section, the other end of lower tower column upper section with the bottom end rail is fixed, the cross sectional area of lower tower column upper section is less than the cross sectional area of lower tower column lower section.
In some embodiments, a transverse wind-resistant support is arranged between the first steel box girder and the second steel box girder and the bridge tower respectively.
In some embodiments, a plurality of small stringers are provided on the first steel box girder along the longitudinal direction of the railway track.
In some embodiments, the main beam further comprises: the cross beam is connected with the first steel box girder and the second steel box girder, is positioned between the first steel box girder and the second steel box girder, and is provided with a plurality of cross beams along the longitudinal bridge direction at intervals.
In some embodiments, the first steel box girder and the second steel box girder are substantially identical in structure, and each of the first steel box girder and the second steel box girder includes: the vertical bridge comprises a top plate, a flat bottom plate and an inclined bottom plate which are arranged along the vertical bridge direction, wherein the flat bottom plate and the inclined bottom plate are positioned on the same side of the top plate, a middle web plate is arranged between the top plate and the flat bottom plate, an edge web plate is arranged between the top plate and the inclined bottom plate, and the ends of the top plate, the middle web plate, the flat bottom plate, the inclined bottom plate and the edge web plate are welded in sequence to form a box-shaped structure; the lengths of the top plate and the bottom plate of the first steel box girder along the transverse bridge direction are larger than those of the top plate and the bottom plate of the second steel box girder along the transverse bridge direction; and a plurality of diaphragm plates are arranged between the middle web plate and the side web plates at intervals along the longitudinal bridge direction.
In some embodiments, the top plate, the middle web, the flat bottom plate, the inclined bottom plate, the side web and the diaphragm plate are welded with stiffening ribs.
The technical scheme provided by the invention has the beneficial effects that:
the embodiment of the invention provides a cable-stayed bridge with common-rail and same-layer asymmetric arrangement, because the main beam comprises a first steel box beam and a second steel box beam, the first steel box beam and the second steel box beam are respectively positioned at two opposite sides of a bridge tower, the constant load on the first steel box beam is larger than the constant load on the second steel box beam, the length of the first steel box beam along the transverse direction of the bridge is smaller than that of the second steel box beam along the transverse direction of the bridge, the distance between the first steel box beam and the bridge tower is a first preset distance, the distance between the second steel box beam and the bridge tower is a second preset distance, and the constant load acting line of the main beam is overlapped with the axis of the bridge tower along the transverse direction of the bridge tower by adjusting the first preset distance and the second preset distance.
The embodiment of the invention provides a cable-stayed bridge with a common-railway and same-layer asymmetric arrangement, wherein as a first steel box girder and a second steel box girder are respectively positioned at two opposite sides of a bridge tower, railways are arranged on the first steel box girder, and roads are arranged on the second steel box girder, so that the intersection of the wiring of the roads and the railways is avoided, and compared with the bridge with the same-layer symmetric arrangement, the cable-stayed bridge reduces the wiring space requirement and has strong adaptability to the topography of bridge positions; the bridge deck has the advantages of lower bridge deck elevation, small gradient of bridge approach at two sides of the main bridge, short length, small occupied area and less total engineering investment.
The embodiment of the invention provides a cable-stayed bridge with common-rail same-layer asymmetric arrangement, wherein the distribution of active loads acting on a transverse bridge direction is similar to that of secondary constant loads, the active loads of a train on a first steel box girder are larger, but the resultant acting line is closer to the axis of a bridge tower; the active load of the automobile on the second steel box girder is smaller, but the action line of the combined force is far from the axis of the bridge tower. Therefore, the deformation and torsion of the transverse bridge generated by the structure under the action of live load are reduced.
The embodiment of the invention provides a cable-stayed bridge with asymmetric arrangement of common iron and common layers, which is characterized in that a single column type tower is combined with a transverse stable rope, so that the material consumption and the basic scale of the bridge tower are effectively reduced under the condition of meeting the structural strength, rigidity and stability compared with a double column type tower, thereby reducing the manufacturing cost and having better economic benefit.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a cable-stayed bridge with asymmetric common-rail layers according to an embodiment of the present invention;
fig. 2 is a top view of a cable-stayed bridge with asymmetric common-rail layers according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a main girder structure of a cable-stayed bridge with asymmetric arrangement of common-rail and common-rail layers according to an embodiment of the present invention.
In the figure:
1. a bridge tower; 11. a lower tower column; 111. a lower section of the lower tower column; 112. an upper section of the lower tower column; 12. a lower cross beam; 13. a tower column is arranged; 14. a cross brace; 141. an anchor point; 15. a lateral stabilizing cable; 151. an upper lateral stabilizing rope; 152. a lower lateral stabilizing cable; 2. a main beam; 21. a first steel box girder; 211. a top plate; 212. a flat bottom plate; 213. an inclined bottom plate; 214. a middle web; 215. a side web; 216. a diaphragm; 22. a second steel box girder; 23. a cross beam; 3. stay cables; 4. and a transverse wind-resistant support.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The embodiment of the invention provides a cable-stayed bridge with common-rail and same-layer asymmetric arrangement, which can solve the problems that a main girder and a main tower of the cable-stayed bridge in the related art will generate transverse bridge directional deformation under the action of constant load, and the cable-stayed bridge has a complex structure and reduced economy.
Referring to fig. 1, a cable-stayed bridge with asymmetric common-rail and common-rail layers according to an embodiment of the present invention may include: a single or a plurality of bridge towers 1 arranged along the longitudinal bridge direction, in this embodiment, the bridge towers 1 are single column towers; the main beam 2, the main beam 2 may include a first steel box girder 21 and a second steel box girder 22, the first steel box girder 21 may be used for arranging railways, the second steel box girder 22 may be used for arranging roads, in this embodiment, two railway lines are arranged on the first steel box girder 21, four road lines are arranged on the second steel box girder 22, in other embodiments, other numbers of railway lines may be arranged on the first steel box girder 21, and other numbers of roads may be arranged on the second steel box girder 22 according to actual calculation, constant load on the first steel box girder 21 may be greater than constant load on the second steel box girder 22, the first steel box girder 21 and the second steel box girder 22 may be respectively located at opposite sides of the bridge tower 1, length of the first steel box girder 21 along the transverse bridge may be smaller than length of the second steel box girder 22 along the transverse bridge, namely, the center of gravity of the first steel box girder 21 is closer to the axis of the bridge tower 1, the center of gravity of the second steel box girder 22 is farther from the axis of the bridge tower 1, the distance between the first steel box girder 21 and the bridge tower 1 along the transverse bridge direction can be a first preset distance, the distance between the second steel box girder 22 and the bridge tower 1 along the transverse bridge direction can be a second preset distance, according to the lever principle, the first preset distance and the second preset distance can be adjusted according to actual conditions, so that the stress on two opposite sides of the bridge tower 1 can be balanced, the constant load action line on the main girder 2 coincides with the axis of the bridge tower 1 along the transverse bridge direction, and the constant load action line refers to the dead weight of the first steel box girder 21, the second constant load on the first steel box girder 21, the dead weight of the second steel box girder 22 and the combined force action line of the second steel box girder 22; the top of the bridge tower 1 can be respectively connected with the transverse bridge of the main beam 2 to two sides by the plurality of stay cables 3, and the specification and the initial tension of the plurality of stay cables 3 are the same, so that the transverse self-balancing effect of the bridge tower 1 can be achieved by skillfully adopting an asymmetric structure, the unbalanced load effect caused by transverse asymmetric arrangement of male iron is eliminated, and the bridge tower has the advantages of simple structure and high economy; meanwhile, the train live load on the first steel box girder 21 is larger, but the resultant force action line of the train live load is closer to the axis of the bridge tower 1; the active load of the automobile on the second steel box girder 22 is smaller, but the action line of the active load of the automobile is far away from the axis of the bridge tower 1, so that the transverse bridge deformation and torsion effect generated by the structure of the cable-stayed bridge under the active load are smaller.
Referring to fig. 1, in some embodiments, the pylon 1 may be a single column pylon, and the pylon 1 may comprise: the top of the lower tower column 11 can be supported on the cable-stayed bridge, a tower seat can be arranged at the bottom of the lower tower column 11, and the tower seat can spread the force at the bottom of the lower tower column 11 to the bearing platform; the lower beam 12 can be fixed at the top of the tower column, a first steel box girder 21 and a second steel box girder 22 can be arranged on the lower beam 12 at intervals along the transverse bridge direction, a plurality of vertical supports can be arranged between the lower beam 12 and the first steel box girder 21 and the second steel box girder 22 respectively, the vertical supports can support the first steel box girder 21 and the second steel box girder 22, the width of the lower beam 12 on one side of the first steel box girder 21 is smaller than the width of the lower beam 12 on one side of the second steel box girder 22, and the arrangement of the positions of the lower beam 12 can be matched with the lengths of the first steel box girder 21 and the second steel box girder 22 along the transverse bridge direction; the upper tower column 13, the upper tower column 13 can pass through the gap between the first steel box girder 21 and the second steel box girder 22 and is fixed with the lower cross beam 12, and the axes of the upper tower column 13 and the lower tower column 11 are coincident, so that the first steel box girder 21 and the second steel box girder 22 are positioned on two opposite sides of the upper tower column 13 and the lower tower column 11, and compared with a double column type tower, the single column type tower has the advantages that the material consumption and the basic scale of the bridge tower 1 are effectively reduced under the condition of meeting the structural strength, the rigidity and the stability, the manufacturing cost is reduced, and the economic benefit is better.
Referring to fig. 1, in some embodiments, the pylon 1 may further comprise: at least two cross braces 14, the two cross braces 14 may be respectively disposed at opposite ends of the lower cross beam 12, and the cross braces 14 may be inserted into the lower cross beam 12 to be fixed with the lower cross beam 12; in this embodiment, two opposite sides of the bridge tower 1 are respectively provided with one transverse stabilizing cable 15, in other embodiments, other numbers of transverse stabilizing cables 15 may be provided, one end of the upper transverse stabilizing cable 151 may be anchored at the upper portion of the upper tower column 13, the other end of the upper transverse stabilizing cable 151 may be connected to the anchoring point 141 on the cross brace 14, one end of the lower transverse stabilizing cable 152 may be connected to the anchoring point 141 on the cross brace 14, and the other end of the lower transverse stabilizing cable 152 may be anchored to the lower tower column 11, so that the upper tower column 13, the lower tower column 11, the lower cross beam 12, the cross brace 14 and the transverse stabilizing cable 15 form a triangular truss in the cross bridge direction, under the action of load such as transverse wind and live load, the transverse stability of one side, the upper tower column 13 and the lower cross beam 12 are stressed, the transverse rigidity of the bridge tower 1 is effectively improved, the pressure of the upper tower column 13 is converted into the upper tower column 13 to a certain extent, the weight is reduced, the weight of the cross section is reduced, and the weight of the tower column 13 is reduced, and the weight is reduced.
Referring to fig. 1, in some embodiments, the distance between the anchoring point 141 on one side of the first steel box girder 21 and the bridge tower 1 may be a first distance, the distance between the anchoring point 141 on one side of the second steel box girder 22 and the bridge tower 1 may be a second distance, and the first distance may be smaller than the second distance, that is, the triangle formed by the upper lateral stabilizing cables 151 and the cross braces 14 on two opposite sides of the bridge tower 1 and the upper tower column 13 and the lower cross beam 12 respectively is an asymmetric triangle, and the triangle formed by the lower lateral stabilizing cables 152 and the cross braces 14 on two opposite sides of the bridge tower 1 and the lower tower column 11 and the lower cross beam 12 respectively is an asymmetric triangle, so that the structure of the cable-stayed bridge may be matched with the first steel box girder 21 and the second steel box girder 22 which are designed asymmetrically, so that the structure of the cable-stayed bridge is more stable.
Referring to fig. 1, in some embodiments, the lower tower 11 may include: a lower tower column lower section 111, the bottom of which can be provided with a tower seat; the upper end of the lower tower column 11, one end of the upper section 112 of the lower tower column is fixed on the top surface of the lower section 111 of the lower tower column, the other end of the upper section 112 of the lower tower column is fixed with the lower cross beam 12 and supported below the lower cross beam 12, the cross section area of the upper section 112 of the lower tower column is smaller than that of the lower section 111 of the lower tower column, in this embodiment, the anchoring positions of the lower lateral stabilizing cables 152 and the lower tower column 11 are located at the section sections of the lower tower column 11, and the lower tower column 11 with the structure has the function of supporting a cable-stayed bridge and can reduce the cross section area of the tower column and save the manufacturing cost.
Referring to fig. 1, in some embodiments, a transverse wind-resistant support 4 may be disposed between the first steel box girder 21 and the second steel box girder 22 and the bridge tower 1, that is, a transverse wind-resistant support 4 is disposed between the first steel box girder 21 and the upper tower column 13, and a transverse wind-resistant support 4 is disposed between the second steel box girder 22 and the upper tower column 13, where the transverse wind-resistant support 4 may perform a pushing action on the first steel box girder 21 and the second steel box girder 22 in a transverse bridge direction, and may prevent the first steel box girder 21 and the second steel box girder 22 from performing a transverse bridge shaking under the load actions such as transverse wind and live load.
Referring to fig. 1, in some embodiments, a plurality of small stringers may be disposed on the first steel girder box along a longitudinal direction of the railway track, the small stringers are disposed right under each railway track, and the small stringers are of an inverted T-shaped structure, and the small stringers are welded and fixed to the first steel girder box, so that local rigidity of the railway bridge deck may be ensured.
Referring to fig. 1, in some embodiments, a cross beam 23 may be disposed between the first steel box beam 21 and the second steel box beam 22 along the transverse bridge direction, the cross beam 23 may connect the first steel box beam 21 and the second steel box beam 22, in this embodiment, the cross beam 23 may connect the first steel box beam 21 and the second steel box beam 22 through bolts, in other embodiments, the cross beam 23 may connect the first steel box beam 21 and the second steel box beam 22 through welding or other manners, and a plurality of cross beams 23 may be disposed between the first steel box beam 21 and the second steel box beam 22 along the longitudinal bridge direction at intervals, in this embodiment, one cross beam 23 may be disposed at intervals of 9m, in other embodiments, one cross beam 23 may be disposed at intervals of other distances, and by disposing the cross beam 23, the stress of the main beam 2 in the transverse bridge direction may be ensured to meet the requirements.
Referring to fig. 1, in some embodiments, the first steel box girder 21 and the second steel box girder 22 have the same structure, and each of the first steel box girder 21 and the second steel box girder 22 may include: the top plate 211, the flat bottom plate 212 and the inclined bottom plate 213 are arranged along the longitudinal bridge direction, the flat bottom plate 212 and the inclined bottom plate 213 can be positioned on the same side of the top plate 211, a middle web 214 can be arranged between the top plate 211 and the flat bottom plate 212, a side web 215 can be arranged between the top plate 211 and the inclined bottom plate 213, and the ends of the top plate 211, the middle web 214, the flat bottom plate 212, the inclined bottom plate 213 and the side web 215 can be welded in sequence to form a box structure; the lengths of the top plate 211 and the bottom plate 212 of the first steel box girder 21 in the transverse bridge direction may be greater than the lengths of the top plate 211 and the bottom plate 212 of the second steel box girder 22 in the transverse bridge direction; a plurality of transverse baffles 216 can be arranged between the middle web 214 and the side webs 215 at intervals along the longitudinal bridge direction, in the embodiment, the transverse baffles 216 are transverse baffles 216 with variable heights, and one transverse baffle 216 is arranged at each interval of 3m along the longitudinal bridge direction, so that transverse loads on the first steel box girder 21 and the second steel box girder 22 can be transmitted.
Referring to fig. 1, in some embodiments, the top plate 211, the middle web 214, the flat bottom plate 212, the inclined bottom plate 213, the side webs 215 and the transverse partition plate 216 may be welded with stiffening ribs, so as to ensure local stress and stability of the steel plate.
The principle of the cable-stayed bridge with the same-layer asymmetric arrangement of the common iron provided by the embodiment of the invention is as follows:
because the bridge tower 1 is a single column type tower, the main beam 2 comprises a first steel box girder 21 and a second steel box girder 22, railways can be arranged on the first steel box girder 21, highways can be arranged on the second steel box girder 22, the first steel box girder 21 and the second steel box girder 22 are respectively positioned on two opposite sides of the bridge tower 1, the constant load on the first steel box girder 21 can be larger than the constant load on the second steel box girder 22, when the first steel box girder 21 and the second steel box girder 22 are designed, the length of the first steel box girder 21 along the transverse direction is designed to be smaller than the length of the second steel box girder 22 along the transverse direction, namely the constant load acting line on the first steel box girder 21 is nearer to the axis of the bridge tower 1, the constant load acting line on the second steel box girder 22 is farther away from the axis of the bridge tower 1, the distance between the first steel box girder 21 and the bridge tower 1 can be a first preset distance, the distance between the second steel box girder 22 and the bridge tower 1 can be a second preset distance, the distance can be a second preset distance according to the lever preset, the principle can be adjusted according to the preset distance, and the actual distance can be coincident with the first preset distance, and the transverse direction can be balanced with the bridge tower 1, so that the force can be clearly and the two sides of the bridge tower can be balanced, and the load can be balanced, and the bridge tower is clearly stressed on the two sides.
Meanwhile, as the train live load on the first steel box girder 21 is larger, the resultant force action line of the train live load is closer to the axis of the bridge tower 1; the active load of the automobile on the second steel box girder 22 is smaller, but the action line of the active load of the automobile is far away from the axis of the bridge tower 1, so that the transverse bridge deformation and torsion effect generated by the structure of the cable-stayed bridge under the action of the active load of the train and the automobile are smaller.
In the description of the present invention, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of describing the present invention and simplifying the description, and are not indicative or implying that the apparatus or element in question must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present invention. Unless specifically stated or limited otherwise, the terms "mounted," "connected," and "coupled" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
It should be noted that in the present invention, relational terms such as "first" and "second" and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The foregoing is only a specific embodiment of the invention to enable those skilled in the art to understand or practice the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. A cable-stayed bridge with common-rail and same-layer asymmetric arrangement, which is characterized by comprising:
-a single or a plurality of pylons (1) arranged along the longitudinal bridge direction, the structure of the pylons (1) being a single column pylon;
-a main girder (2) comprising a first steel box girder (21) for arranging a railway and a second steel box girder (22) for arranging a highway, wherein the constant load on the first steel box girder (21) is greater than the constant load on the second steel box girder (22), the first steel box girder (21) and the second steel box girder (22) are respectively positioned on two opposite sides of the bridge tower (1), the length of the first steel box girder (21) along the transverse bridge direction is smaller than the length of the second steel box girder (22) along the transverse bridge direction, the distance between the first steel box girder (21) and the bridge tower (1) is a first preset distance, the distance between the second steel box girder (22) and the bridge tower (1) is a second preset distance, and the constant load action line of the main girder (2) is overlapped with the axis of the bridge tower (1) along the transverse bridge direction by adjusting the first preset distance and the second preset distance;
and a plurality of stay cables (3) connecting the bridge tower (1) and the main beam (2) to two sides of the transverse bridge;
the pylon (1) comprises:
-a lower pylon (11) for supporting the cable-stayed bridge;
the lower cross beam (12) is fixed at the top of the lower tower column (11), the first steel box girder (21) and the second steel box girder (22) are arranged on the lower cross beam (12) along a transverse bridge at intervals, and the width of the lower cross beam (12) on one side of the first steel box girder (21) is smaller than that on one side of the second steel box girder (22);
an upper tower column (13) which is fixed to the lower cross beam (12) through a gap between the first steel box beam (21) and the second steel box beam (22);
the pylon (1) further comprises:
the two transverse struts (14) are respectively arranged at two opposite ends of the lower transverse beam (12) and are fixed with the lower transverse beam (12);
a plurality of transverse stabilizing cables (15), which comprises an upper transverse stabilizing cable (151) and a lower transverse stabilizing cable (152), wherein one end of the upper transverse stabilizing cable (151) is anchored at the upper part of the upper tower column (13), the other end of the upper transverse stabilizing cable (151) is connected with the anchoring point (141) of the transverse support (14), one end of the lower transverse stabilizing cable (152) is connected with the anchoring point (141) of the transverse support (14), and the other end of the lower transverse stabilizing cable (152) is anchored at the lower tower column (11).
2. A cable-stayed bridge with asymmetric arrangement of common-rail and common-rail layers as claimed in claim 1, wherein:
a first distance is reserved between the anchoring point (141) on one side of the first steel box girder (21) and the bridge tower (1), a second distance is reserved between the anchoring point (141) on one side of the second steel box girder (22) and the bridge tower (1), and the first distance is smaller than the second distance.
3. A cable-stayed bridge with asymmetric arrangement of common-rail and common-rail layers according to claim 1, characterized in that the lower tower (11) comprises:
a lower tower column lower section (111), the bottom of which is provided with a tower seat;
and one end of the lower tower column upper section (112) is fixed on the top surface of the lower tower column lower section (111), the other end of the lower tower column upper section (112) is fixed with the lower cross beam (12), and the cross section area of the lower tower column upper section (112) is smaller than that of the lower tower column lower section (111).
4. A cable-stayed bridge with asymmetric arrangement of common-rail and common-rail layers as claimed in claim 1, wherein:
and a transverse wind-resistant support (4) is arranged between the first steel box girder (21) and the second steel box girder (22) and the bridge tower (1).
5. A cable-stayed bridge with asymmetric arrangement of common-rail and common-rail layers as claimed in claim 1, wherein:
a plurality of small longitudinal beams are arranged on the first steel box girder (21) along the longitudinal direction of the railway track.
6. A cable-stayed bridge with asymmetric arrangement of common-rail and common-rail layers according to claim 1, characterized in that the main girder (2) further comprises:
the cross beam (23) is connected with the first steel box beam (21) and the second steel box beam (22), the cross beam (23) is positioned between the first steel box beam (21) and the second steel box beam (22), and a plurality of cross beams (23) are arranged at intervals along the longitudinal bridge direction.
7. A cable-stayed bridge with asymmetric arrangement of common-rail and railway according to claim 1, characterized in that the first steel box girder (21) and the second steel box girder (22) have substantially the same structure, and the first steel box girder (21) and the second steel box girder (22) each comprise:
the vertical bridge comprises a top plate (211), a flat bottom plate (212) and an inclined bottom plate (213) which are arranged along a vertical bridge direction, wherein the flat bottom plate (212) and the inclined bottom plate (213) are positioned on the same side of the top plate (211), a middle web plate (214) is arranged between the top plate (211) and the flat bottom plate (212), a side web plate (215) is arranged between the top plate (211) and the inclined bottom plate (213), and the ends of the top plate (211), the middle web plate (214), the flat bottom plate (212), the inclined bottom plate (213) and the side web plate (215) are welded in sequence to form a box structure;
the lengths of the top plate (211) and the flat bottom plate (212) of the first steel box girder (21) along the transverse bridge direction are larger than those of the top plate (211) and the flat bottom plate (212) of the second steel box girder (22) along the transverse bridge direction;
a plurality of transverse baffles (216) are arranged between the middle web plate (214) and the side web plates (215) at intervals along the longitudinal bridge direction.
8. The common-rail same-layer asymmetrically-arranged cable-stayed bridge according to claim 7, wherein:
stiffening ribs are welded on the top plate (211), the middle web plate (214), the flat bottom plate (212), the inclined bottom plate (213) and the side web plates (215) and the diaphragm plates (216).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111205191.1A CN113863114B (en) | 2021-10-15 | 2021-10-15 | Cable-stayed bridge with same-layer asymmetric arrangement of male and female railways |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111205191.1A CN113863114B (en) | 2021-10-15 | 2021-10-15 | Cable-stayed bridge with same-layer asymmetric arrangement of male and female railways |
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| CN113863114A CN113863114A (en) | 2021-12-31 |
| CN113863114B true CN113863114B (en) | 2023-06-23 |
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| CN114717961B (en) * | 2022-04-22 | 2023-04-28 | 中交第二航务工程局有限公司 | Independent-tower self-anchored suspension bridge structure without lower cross beam and construction method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104846733A (en) * | 2014-12-05 | 2015-08-19 | 广东省公路勘察规划设计院股份有限公司 | Half-through bowstring arch bridge with vehicle and light rail on same layer and construction method thereof |
| CN105421212A (en) * | 2015-06-09 | 2016-03-23 | 吉林省银河水利水电新技术设计有限公司 | Single tower cable-stayed bridge with unsymmetrical plane broken line arranged bridge deck and building method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004300744A (en) * | 2003-03-31 | 2004-10-28 | Jfe Engineering Kk | Windproof bridge |
| JP4252982B2 (en) * | 2005-08-15 | 2009-04-08 | 独立行政法人土木研究所 | Bridge and bridge construction method |
| CN101215819B (en) * | 2007-12-27 | 2012-02-29 | 上海市政工程设计研究总院 | Separated double-layer bridge-floor cable stayed bridge |
| CN102392422B (en) * | 2011-11-26 | 2013-04-24 | 广州大学 | Reinforcement structure of single-cable-plane cable-stayed bridge |
| CN206591417U (en) * | 2017-03-01 | 2017-10-27 | 中铁第四勘察设计院集团有限公司 | A kind of only floating system cable stayed bridge structure of post wide cut rachis face half |
| CN110607740A (en) * | 2018-06-15 | 2019-12-24 | 中铁第四勘察设计院集团有限公司 | Cable-stayed bridge with main beams penetrating through bridge towers arranged on same-layer road and railway in offset load mode |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104846733A (en) * | 2014-12-05 | 2015-08-19 | 广东省公路勘察规划设计院股份有限公司 | Half-through bowstring arch bridge with vehicle and light rail on same layer and construction method thereof |
| CN105421212A (en) * | 2015-06-09 | 2016-03-23 | 吉林省银河水利水电新技术设计有限公司 | Single tower cable-stayed bridge with unsymmetrical plane broken line arranged bridge deck and building method thereof |
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