CN111560831A - Continuous bridge without fixed support - Google Patents
Continuous bridge without fixed support Download PDFInfo
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- CN111560831A CN111560831A CN202010316128.4A CN202010316128A CN111560831A CN 111560831 A CN111560831 A CN 111560831A CN 202010316128 A CN202010316128 A CN 202010316128A CN 111560831 A CN111560831 A CN 111560831A
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- Prior art keywords
- bridge
- concrete beam
- continuous
- main
- main pier
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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
- E01D1/00—Bridges in general
-
- 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
Abstract
The invention relates to the technical field of bridge structure buildings, and provides a continuous bridge without fixed supports, which comprises a plurality of main piers, a concrete beam arranged along the longitudinal direction of the bridge and a plurality of supporting structures for movably supporting the concrete beam, wherein each main pier is arranged below the concrete beam, and each main pier is also connected to the concrete beam through an elastic cable arranged along the longitudinal direction of the bridge. According to the continuous bridge without the fixed support, the longitudinal displacement of the main beam can be reduced by adjusting the cable force of the elastic cable and adjusting the rigidity of the damper arranged along the longitudinal direction of the bridge, and the two are independently used or matched for use, so that the temperature 0 point is limited to be at the midspan position, the problem that a steel rail telescopic regulator is required to be arranged on the long-span continuous beam of the high-speed railway is solved, the span range of the continuous beam without the steel rail telescopic regulator is greatly widened, the steel consumption and the maintenance workload are greatly reduced compared with a steel bridge or a steel pipe arch stiffening rigid frame, and the construction cost is obviously reduced.
Description
Technical Field
The invention relates to the technical field of bridge structure buildings, in particular to a continuous bridge without a fixed support.
Background
Along with the development of high-speed railway construction, the structural form of a large-span concrete bridge is widely applied, and seamless lines are paved on the large-span concrete bridge, which is a severe test for both bridge and rail engineering.
Laying a jointless track on a continuous beam usually requires a rail expansion adjuster. And the length of the conventional continuous beam is generally controlled to be less than 200m in the side span and the mid-span, and the length of the main span is generally less than 128m, so that a steel rail expansion adjuster is avoided. The temperature span is the distance from the fixed support to the adjacent fixed support, and when the temperature span exceeds 200m, a steel rail telescopic regulator is generally required to be arranged.
The rail expansion adjustment ware makes the temperature stress that jointless quality route freely diffuses the internal portion of roof beam production according to the temperature variation condition on the bridge in the operation process to reduce the jointless quality route longitudinal force that track and long and large bridge pier shaft bore, nevertheless influence the driving travelling comfort, and increase maintenance work volume, increase engineering cost, still can become the weak link of track structure.
Disclosure of Invention
The invention aims to provide a continuous bridge without a fixed support, which solves the problem that a long-span continuous beam of a high-speed railway needs to be provided with a steel rail telescopic regulator through the cable force regulation of an elastic cable, greatly widens the span range of the continuous beam without the steel rail telescopic regulator, greatly reduces the steel consumption and the maintenance workload, and obviously reduces the construction cost.
In order to achieve the above purpose, the embodiments of the present invention provide the following technical solutions: the utility model provides a continuous bridge of no fixing support, includes a plurality of main piers, along the vertical concrete beam that sets up of bridge and mobile support a plurality of bearing structure of concrete beam, each main pier is all located the below of concrete beam, and each main pier still is connected through the elastic cable along the vertical setting of bridge on the concrete beam.
Furthermore, the supporting structures are sequentially arranged along the longitudinal direction of the bridge, a plurality of the supporting structures correspond to the main piers one by one, and each main pier is connected with the concrete beam through the corresponding supporting structure.
And the damper is arranged along the longitudinal direction of the bridge and is arranged between the support structure at the main pier and the concrete beam.
Further, each support structure comprises a first movable support capable of moving along the longitudinal direction of the bridge, and the main pier is connected with the concrete beam through the first movable support.
Furthermore, each support structure also comprises a second movable support capable of moving in multiple directions, and the main pier is connected with the concrete beam through the first movable support and the second movable support.
Further, the first movable support and the second movable support of each support structure are arranged transversely along the bridge.
Furthermore, each main pier is connected to the concrete beam through two elastic cables, and the two elastic cables are transversely arranged along the bridge.
Further, one end of the elastic cable far away from the main pier is connected to the concrete beam close to the arch vertex.
Compared with the prior art, the invention has the beneficial effects that: the utility model provides a continuous bridge of no fixing support, adjust through the cable force of elastic cord, still adjust through the rigidity of the attenuator of following the vertical setting of bridge, the two independent use or cooperation are used, can reduce girder longitudinal displacement, the 0 point of restriction temperature is in the mid-span position, the difficult problem that continuous roof beam need set up the flexible regulator of rail has been solved to high-speed railway long-span, the span range of continuous roof beam that need not set up the flexible regulator of rail has been widened greatly, compare with steel bridge, perhaps steel pipe arch stiffening rigid frame, the steel volume and maintenance work load reduce by a wide margin, engineering cost obviously reduces.
Drawings
Fig. 1 is a schematic elevation layout view of a continuous bridge without a fixed support provided by an embodiment of the invention;
FIG. 2 is a schematic plan view of a continuous bridge without fixed bearings according to an embodiment of the present invention;
FIG. 3 is an enlarged schematic view of FIG. 1 at A;
in the reference symbols: 1-main pier; 2-a concrete beam; 3-a support structure; 30-a first cradle; 31-a second cradle; 4-an elastic cord; 5-a damper.
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.
Referring to fig. 1, 2 and 3, an embodiment of the present invention provides a continuous bridge without a fixed support, including a plurality of main piers 1, a concrete beam 2 disposed along a longitudinal direction of the bridge, and a plurality of support structures 3 movably supporting the concrete beam 2, wherein each of the main piers 1 is disposed below the concrete beam 2, and each of the main piers 1 is further connected to the concrete beam 2 by a flexible cable 4 disposed along the longitudinal direction of the bridge. In the prior art, to lay the jointless quality route on the continuous beam, need set up rail flexible regulator usually, because rail flexible regulator can make jointless quality route freely diffuse the temperature stress that the internal portion of roof beam produced according to the temperature variation condition in the operation process on the bridge, thereby reduce the longitudinal force of jointless quality route that track and long and large bridge pier body bore, however this rail flexible regulator's shortcoming is also very obvious, it not only can influence the driving travelling comfort, increase maintenance work load, increase engineering cost, can also form track structure's weak link. Therefore, the number of the steel rail telescopic adjusters is the crux, and the defects can be solved as long as the steel rail telescopic adjusters are reduced or not arranged. In this embodiment, therefore, the full bridge uses the support structure 3 for movably supporting the concrete beam 2, so that the temperature span can be shortened, because the distance between the fixed supports can easily exceed 200m, and the rail expansion adjuster is required to be arranged when the distance exceeds 200 m. Then, the main pier 1 and the concrete beam 2 are connected through the elastic cable 4, when the temperature rises and falls, the elastic cable 4 arranged along the longitudinal direction of the bridge can restrain the deformation of the concrete beam 2 (main beam), so that the effect of limiting the temperature 0 point to the midspan position and reducing the temperature span of the continuous beam is achieved, the problem that a steel rail telescopic regulator needs to be arranged on the long-span continuous beam of the high-speed railway is solved, the span range of the continuous beam without the steel rail telescopic regulator is greatly widened, compared with a steel bridge or a steel pipe arch stiffening rigid frame, the steel consumption and the maintenance workload are greatly reduced, and the construction cost is obviously reduced. The bridge structure is convenient to construct and can be conveniently suitable for the requirement of a ballastless track.
The following are specific examples:
as an optimized solution of the embodiment of the present invention, please refer to fig. 1 and 2, each of the support structures 3 is sequentially arranged along a longitudinal direction of the bridge, and several of the support structures 3 correspond to each of the main piers 1 one by one, and each of the main piers 1 is connected to the concrete beam 2 through the corresponding support structure 3. In the present embodiment, one support structure 3 is associated with each main pier 1. Preferably, the continuous bridge further comprises a damper 5 arranged along the longitudinal direction of the bridge, wherein the damper 5 is arranged between the support structure 3 corresponding to the main pier 1 and the concrete beam 2. In the embodiment, the rigidity adjustment of the damper 5 can also reduce the longitudinal displacement of the main beam, limit the temperature 0 point at the midspan position, improve the application range of the concrete continuous beam, and can be matched with the cable force adjustment of the elastic cable 4 to achieve a better effect.
As a preferred solution of the embodiment of the present invention, referring to fig. 1 and 2, each of the support structures 3 includes a first movable support 30 movable in a longitudinal direction of the bridge, and the main pier 1 is connected to the concrete beam 2 through the first movable support 30. In this embodiment, the first movable support 30 can avoid the problem caused by the fixed distance between the fixed supports, because the distance between the fixed supports changes when the temperature is raised or lowered, that is, the distance between the temperature spans (i.e., the distance from the fixed support to the adjacent fixed support) changes, and if the distance exceeds 200m, a rail expansion and contraction adjuster needs to be arranged, so that the first movable support 30 can move in the longitudinal direction of the bridge, as shown in fig. 2, the arrow in the figure is the moving direction of the first movable support 30. Preferably, each of the support structures 3 further includes a second movable support 31 movable in multiple directions, and the main pier 1 is connected to the concrete beam 2 through the first movable support 30 and the second movable support 31. In this embodiment, the supporting structure 3 may further comprise a second movable support 31, and the second movable support 31 may be movable along the longitudinal direction of the bridge, or along the transverse direction of the bridge, compared with the first movable support 30, and when necessary, the movement in this direction may be performed, as shown in fig. 2, and the arrow in the figure is the movement direction of the second movable support 31. Preferably, the first and second mobile supports 30, 31 of each of the support structures 3 are arranged in the bridge transverse direction, and in each of the support structures 3, the first and second mobile supports 30, 31 thereof are arranged in the bridge transverse direction.
Referring to fig. 1 and 2 as an optimized solution of the embodiment of the present invention, each main pier 1 is connected to the concrete beam 2 by two elastic cables 4, and the two elastic cables 4 are arranged along the bridge in the transverse direction. In this embodiment, each main pier 1 is connected to the concrete beam 2 by two elastic ropes 4, and the two elastic ropes 4 are arranged in the transverse direction of the bridge, so that a stable rope force can be given.
Referring to fig. 1 and 2 as a preferred solution of the embodiment of the present invention, one end of the elastic cable 4 away from the main pier 1 is connected to the concrete beam 2 near the arch apex. In this embodiment, the elastic cord 4 extends to a position near the apex of the concrete beam 2. Preferably, the elastic ropes 4 arranged on the two adjacent main piers 1 are symmetrical about the arch apex of the concrete beam 2.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. A continuous bridge without fixed support is characterized in that: including a plurality of main piers, along the vertical concrete beam that sets up of bridge and mobile support a plurality of bearing structure of concrete beam, each main pier is all located the below of concrete beam, and each main pier still is connected through the elastic cord along the vertical setting of bridge on the concrete beam.
2. A continuous bridge without fixed bearing according to claim 1, characterized in that: the supporting structures are sequentially arranged along the longitudinal direction of the bridge, a plurality of the supporting structures correspond to the main piers one by one, and each main pier is connected with the concrete beam through the corresponding supporting structure.
3. A continuous bridge without fixed bearing according to claim 1, characterized in that: the bridge is characterized by further comprising a damper arranged longitudinally along the bridge, wherein the damper is arranged between the supporting structure at the main pier and the concrete beam.
4. A continuous bridge without fixed bearing according to claim 1, characterized in that: each support structure comprises a first movable support capable of moving along the longitudinal direction of the bridge, and the main pier is connected with the concrete beam through the first movable support.
5. A continuous bridge without fixed bearing according to claim 4, characterized in that: each support structure further comprises a second movable support capable of moving in multiple directions, and the main pier is connected with the concrete beam through the first movable support and the second movable support.
6. A continuous bridge without fixed bearing according to claim 5, characterized in that: the first movable support and the second movable support of each supporting structure are arranged transversely along the bridge.
7. A continuous bridge without fixed bearing according to claim 1, characterized in that: each main pier is connected to the concrete beam through two elastic cables, and the two elastic cables are transversely arranged along the bridge.
8. A continuous bridge without fixed bearing according to claim 1, characterized in that: and one end of the elastic cable far away from the main pier is connected to the concrete beam close to the arch vertex.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010316128.4A CN111560831A (en) | 2020-04-21 | 2020-04-21 | Continuous bridge without fixed support |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010316128.4A CN111560831A (en) | 2020-04-21 | 2020-04-21 | Continuous bridge without fixed support |
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| CN111560831A true CN111560831A (en) | 2020-08-21 |
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| CN202010316128.4A Pending CN111560831A (en) | 2020-04-21 | 2020-04-21 | Continuous bridge without fixed support |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113250086A (en) * | 2021-05-17 | 2021-08-13 | 中交第二公路工程局有限公司 | Method for finely adjusting position of beam body by using ambient temperature and application |
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| CN110219234A (en) * | 2019-06-20 | 2019-09-10 | 中铁大桥勘测设计院集团有限公司 | Temperature self-adaptation tower Liang Shunqiao is to constant temperature reinforcing pull rod constrained procedure and system |
| CN212801162U (en) * | 2020-04-21 | 2021-03-26 | 中铁武汉勘察设计研究院有限公司 | Continuous bridge without fixed support |
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2020
- 2020-04-21 CN CN202010316128.4A patent/CN111560831A/en active Pending
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113250086A (en) * | 2021-05-17 | 2021-08-13 | 中交第二公路工程局有限公司 | Method for finely adjusting position of beam body by using ambient temperature and application |
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