CN214328478U - Three-tower self-anchored suspension bridge - Google Patents
Three-tower self-anchored suspension bridge Download PDFInfo
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- CN214328478U CN214328478U CN202022284089.2U CN202022284089U CN214328478U CN 214328478 U CN214328478 U CN 214328478U CN 202022284089 U CN202022284089 U CN 202022284089U CN 214328478 U CN214328478 U CN 214328478U
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Abstract
A three-tower self-anchored suspension bridge comprises two side piers, two auxiliary piers, a main beam erected on the side piers, three main towers positioned between the auxiliary piers, a plurality of main cables fixed on the main tower and a plurality of slings used for lifting the main beam, wherein the main beam is a combined beam or a steel box beam. The utility model discloses a three towers are from anchor suspension bridge and are public rail and build the bridge jointly, and the main push-towing rope is located and is the space cable surface between highway lane and the city light rail, establishes central authorities in striding and detains the too big problem of tower atress in solving, and bridge tower crossbeam department sets up vertical support and improves structure antitorque performance, and both sides set up supplementary strides and reduce the beam-ends corner. The central buckle forms a three-tower self-anchored suspension bridge structure system, increases the horizontal constraint of the midspan main cable on the top of the middle tower, reduces the longitudinal bridge bending moment at the bottom of the middle tower under unbalanced live load, reduces the structural size of the middle tower, improves the vertical rigidity of the structure, improves the economic span of the three-tower self-anchored suspension bridge, is suitable for three-tower self-anchored suspension bridges with the span of more than 400m, and is suitable for the co-construction of large-span highway rails.
Description
Technical Field
The utility model belongs to the technical field of bridge engineering, a three-tower self-anchored suspension bridge is related to.
Background
The three-tower self-anchored suspension bridge is appreciated by most people due to the beautiful line shape and the well-laid appearance, and is more and more favored by people particularly in urban bridges. The maximum span of the three-tower self-anchored suspension bridge at home and abroad is not more than 200 m. When the span is increased, the unbalanced bending moment at the bottom of the middle tower is obviously increased; when the size rigidity of the middle tower is increased, the anti-sliding coefficient of the main cable of the saddle of the middle tower is obviously reduced. The conflict between the two limits the development of the span of the three-tower self-anchored suspension bridge.
For public rail co-construction bridges, a box girder structure with public rails on the same layer can be generally adopted, a truss structure with the public rails layered can also be adopted, the truss structure is not suitable for maintenance compared with the box girder structure, the box girder structure is easier to be subjected to incremental launching construction, and the method is more suitable for conditions of a construction site.
The existing three-tower self-anchored suspension bridge towers are generally positioned on the outer side of a main beam in the transverse direction, and when a bridge deck is too wide, the transverse distance between the main towers is too large; however, when the bridge tower is arranged at the transverse center of the main beam as a single tower, the size of the bridge tower is often large if the stress and stability of the bridge tower are required to be met.
How to solve the stress of the tower in the long-span three-tower self-anchored suspension bridge and how to balance the mechanics of the wide-deck three-tower self-anchored suspension bridge and the size of the bridge tower is a problem to be solved all the time.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a three towers are from anchor suspension bridge to solve the three towers that prior art exists and hardly break through from anchor suspension bridge stride footpath, and the balanced problem of broad width bridge floor bridge dynamics and bridge tower size.
The utility model discloses an above-mentioned technical problem is solved through following technical scheme:
the utility model provides a three-tower is from anchor suspension bridge, it includes two side piers, set up two supplementary mounds at two side pier inboards, set up three main tower between two supplementary mounds, the girder, a plurality of main cables that are fixed in the main tower and a plurality of hoist cable that are used for carrying the girder, a serial communication port, the girder setting is at the side pier, on the supplementary mound and wear to locate the main tower, between adjacent main tower, erect main cable between supplementary mound and the main tower, main cable is the space cable face, main cable is detained with the girder at midspan position through central authorities and is connected, restraint relative displacement between them.
Furthermore, the three-tower self-anchored suspension bridge is a highway and light rail combined bridge, the light rail lane is positioned in the middle of the bridge floor, the motor vehicle lane is positioned on the outer side of the bridge floor, and the main cable and the main tower are positioned between the light rail lane and the motor vehicle lane.
Furthermore, the bottom of the central buckle is welded with the main beam, a main cable through pipe is arranged at the upper part of the central buckle, and the main cable penetrates through the main cable through pipe of the central buckle.
Furthermore, the main beam is a composite beam or a steel box beam.
Furthermore, vertical support members are arranged between the part, where the main beam penetrates through the main tower, of the main tower and the main tower, brackets are arranged at the position, below the main beam, of the main tower, the vertical support members are arranged between the main beam and the brackets on the inner side of the main tower, the vertical support members are also arranged between the brackets on the outer side of the main tower and the main beam, and the support members transversely expand the brackets on the outer side of the main tower to improve the torsional rigidity of the structure.
Auxiliary spans are formed between the side piers on the two sides and the auxiliary piers, and the functions of reducing the corners of the beam ends and partial weights can be achieved.
The utility model discloses an actively advance the effect and lie in: a novel three-tower self-anchored suspension bridge structural system is formed through the central buckle, horizontal restraint of the midspan main cable on the top of the intermediate tower is increased, so that longitudinal bridge bending moment of the bottom of the intermediate tower under unbalanced live load is reduced, vertical rigidity of the structure is improved, economic span of the three-tower self-anchored suspension bridge is improved, and the three-tower self-anchored suspension bridge is suitable for co-building bridges of large-span public rails. The bridge deck structure is super wide, and the bridge tower passes from the box roof beam centre, has solved the atress problem of broad width bridge floor.
Drawings
Fig. 1 is a schematic structural view of a triple-tower self-anchored suspension bridge according to a preferred embodiment of the present invention.
Fig. 2 is a schematic structural view of a main tower of a triple-tower self-anchored suspension bridge according to a preferred embodiment of the present invention.
Fig. 3 is a schematic structural view of a main beam of a triple-tower self-anchored suspension bridge according to a preferred embodiment of the present invention.
Fig. 4 is a schematic diagram of a central buckle structure of a triple-tower self-anchored suspension bridge according to a preferred embodiment of the present invention.
Fig. 5 is a schematic structural view of a suspension bridge during construction by using the construction process of the three-tower self-anchored suspension bridge according to the preferred embodiment of the present invention.
Detailed Description
The present invention will be more clearly and completely described below with reference to the accompanying drawings.
As shown in fig. 1, 2 and 3, a three-tower self-anchored suspension bridge comprises a foundation 1, two side piers 2, two auxiliary piers 12, main girders erected on the side piers 2, a plurality of main towers 3 located between the side piers 2, a plurality of main cables 4 fixed to the main towers 3, and a plurality of slings 5 for lifting the main girders. As shown in fig. 3, the main beams may be composite beams or steel box beams, including the main steel beams 6 and the concrete deck 9 above the main steel beams 6 if the composite beams are composite beams, and including only the main steel beams 6 if the composite beams are steel box beams. The concrete bridge deck 9 is not shown in both fig. 1 and 2. As shown in FIG. 2, the main steel beams 6 are inserted into the main tower 3, that is, the main steel beams 6 are slotted at the positions staggered with the main tower 3 so as to pass through the main tower, and vertical supporting members 13 are arranged between the part of the main steel beams 6 inserted into the main tower 3 and the corbels 10 of the bridge tower of the main tower 3, and the supporting distance can be transversely expanded to act on the corbels outside the bridge tower. As shown in fig. 4, the main cable 4 and the main beam 6 are provided with a central buckle 11 at a midspan position to restrain the relative displacement of the two.
As shown in fig. 5, the construction process of the composite beam self-anchored suspension bridge includes the following steps:
step 1, building two side piers 2 and two auxiliary piers 12, and building a plurality of lower tower columns of a main tower 3 and a plurality of temporary piers 8 between the two side piers 2;
step 2, building a steel main beam 6, wherein the steel main beam 6 is erected on the side pier 2, the auxiliary pier 12 and the temporary pier 8 and penetrates through the main tower 3;
step 5, erecting a sling 5 between a main steel beam 6 above the temporary pier 8 and a main cable 4;
step 7, according to the near-term highway constant load tensioning sling 5, the initial length of the sling provides a reserved amount for the far-term light rail constant load;
and 8, installing a central buckle 11, tensioning the temporary suspender at the position before installation, and removing the temporary suspender after the installation of the central buckle is finished so that the internal force of the temporary suspender is converted into the central buckle.
And 9, re-tensioning the lifting rod force 5 according to the constant load increase of the light rail in the long term after the bridge is formed, so that the secondary conversion of the system is realized, and the stress of the short-term bridge structure and the stress of the long-term bridge structure are optimal.
In the step 2 of the construction process, a pushing construction process is adopted for the construction of the steel girder, namely, a pushing platform is built at the position of the side pier 2, steel girder segments are assembled at the position of the pushing platform, segments are assembled, segments are pushed in a midspan after welding is completed, and the operation is circulated to midspan closure. The incremental launching construction process is a common construction process and is not described herein again.
In step 3 of the construction process, the tower column on the main tower 3 is constructed by rotating or assembled by sections.
For current three towers from anchor suspension bridge, the utility model discloses a suspension bridge detains through central authorities and forms novel three towers from anchor suspension bridge structural system, has increased the horizontal restraint of main push-towing rope to well tower top of the tower in striding to reduced the uneven live load down the longitudinal bridge at the bottom of the well tower to moment of flexure, reduced the structural dimension of well tower, improved the vertical rigidity of structure, improved three towers from the economy of anchor suspension bridge and strided the footpath, be applicable to the public rail joint construction bridge of striding the footpath greatly. The bridge deck structure is super wide, and the bridge tower passes from the box roof beam centre, has both taken into account the atress problem of broad width bridge floor, has controlled the size of bridge tower again. The construction process accelerates the construction progress and improves the internal force distribution of the central button.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
Although specific embodiments of the present invention have been described above, it will be understood by those skilled in the art that this is by way of example only and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and the principles of the present invention, and these changes and modifications are all within the scope of the present invention.
Claims (4)
1. The utility model provides a three-tower is from anchor suspension bridge, it includes two side piers, set up two supplementary mounds at two side pier inboards, set up three main tower between two supplementary mounds, the girder, a plurality of main cables that are fixed in the main tower and a plurality of hoist cable that are used for carrying the girder, a serial communication port, the girder setting is at the side pier, on the supplementary mound and wear to locate the main tower, between adjacent main tower, erect main cable between supplementary mound and the main tower, main cable is the space cable face, main cable is detained with the girder at midspan position through central authorities and is connected, restraint relative displacement between them.
2. The self-anchored triple-tower bridge as claimed in claim 1, wherein the bottom of said central buckle is welded to the main girder, and the upper part of said central buckle is provided with a main cable through-tube through which the main cable passes.
3. A triple tower self-anchored suspension bridge as in claim 1, wherein the main beams are composite beams or steel box beams.
4. The self-anchored three-tower bridge according to claim 1, wherein the vertical support members are provided between the main tower and the portion of the main tower through which the main beam passes, the main tower is provided with brackets at positions below the main beam, the vertical support members are provided between the main beam and the brackets at the inner side of the main tower, and the vertical support members are provided between the brackets at the outer side of the main tower and the main beam.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022284089.2U CN214328478U (en) | 2020-10-14 | 2020-10-14 | Three-tower self-anchored suspension bridge |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022284089.2U CN214328478U (en) | 2020-10-14 | 2020-10-14 | Three-tower self-anchored suspension bridge |
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| CN214328478U true CN214328478U (en) | 2021-10-01 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112239992A (en) * | 2020-10-14 | 2021-01-19 | 上海市政工程设计研究总院（集团）有限公司 | Novel three-tower self-anchored suspension bridge and construction method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112239992A (en) * | 2020-10-14 | 2021-01-19 | 上海市政工程设计研究总院（集团）有限公司 | Novel three-tower self-anchored suspension bridge and construction method thereof |
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