阅读说明：本技术 一种边跨固结-塔梁半漂浮混合体系混凝土梁斜拉桥 (Side span consolidation-tower beam semi-floating mixed system concrete beam cable-stayed bridge ) 是由 刘振标 任征 郭远航 柯朝晖 段鈜 李喜平 夏正春 于 2019-09-23 设计创作，主要内容包括：本发明属于混凝土梁桥建设技术领域,具体涉及一种边跨固结-塔梁半漂浮混合体系混凝土梁斜拉桥,包括桥塔、斜拉索、加劲梁以及位于所述加劲梁两端的两组边跨桥墩；每组边跨桥墩包括至少一个边跨桥墩；桥塔上设有支座,加劲梁的中部支承于所述支座上；加劲梁的两端分别支承于两组边跨桥墩上,每组边跨桥墩中至少有一个边跨桥墩与所述加劲梁固结；所述桥塔与加劲梁之间设有斜拉索,且所述斜拉索的两端分别与桥塔和加劲梁连接。本发明采用边跨桥墩与加劲梁固结、桥塔上设置支座支承加劲梁组合形成边跨固结-塔梁半漂浮混合体系,通过边跨桥墩对加劲梁的柔性约束作用改善加劲梁的受力性能及竖向残余徐变变形,满足铁路行车要求。(The invention belongs to the technical field of concrete beam bridge construction, and particularly relates to a side span consolidation-tower beam semi-floating hybrid system concrete beam cable-stayed bridge, which comprises a bridge tower, stay cables, stiffening beams and two groups of side span piers positioned at two ends of the stiffening beams; each group of side span bridge piers comprises at least one side span bridge pier; the bridge tower is provided with a support, and the middle part of the stiffening beam is supported on the support; two ends of the stiffening beam are respectively supported on the two groups of side-span piers, and at least one side-span pier in each group of side-span piers is fixedly connected with the stiffening beam; and an inclined stay cable is arranged between the bridge tower and the stiffening beam, and two ends of the inclined stay cable are respectively connected with the bridge tower and the stiffening beam. The invention adopts the combination of the side-span bridge pier and the stiffening girder for consolidation, and the support is arranged on the bridge tower for supporting the stiffening girder to form a side-span consolidation-tower girder semi-floating mixed system, and the stress performance and the vertical residual creep deformation of the stiffening girder are improved by the flexible constraint action of the side-span bridge pier on the stiffening girder, thereby meeting the railway driving requirements.)

1. A side span consolidation-tower beam semi-floating hybrid system concrete beam cable-stayed bridge comprises a bridge tower, stay cables, stiffening beams and two groups of side span piers positioned at two ends of the stiffening beams; each group of side span bridge piers comprises at least one side span bridge pier; the method is characterized in that: the bridge tower is provided with a support, and the middle part of the stiffening beam is supported on the support; two ends of the stiffening beam are respectively supported on two groups of side-span piers, and at least one side-span pier in each group of side-span piers is fixedly connected with the stiffening beam; and an inclined cable is arranged between the bridge tower and the stiffening beam, and two ends of the inclined cable are respectively connected with the bridge tower and the stiffening beam.

2. The sidespan consolidation-tower beam semi-floating hybrid system concrete beam cable-stayed bridge of claim 1, which is characterized in that: the bridge tower comprises tower piers and tower columns, the two sides of the stiffening beam are provided with the tower columns, and the bottom of each tower column is fixedly connected with the tower piers; the support is fixed on the tower pier, and the top of the stay cable is connected with the top of the tower column.

3. The sidespan consolidation-tower beam semi-floating hybrid system concrete beam cable-stayed bridge of claim 2, which is characterized in that: and limiting blocks for limiting the stiffening beam to move along the transverse bridge direction are arranged on the tower columns on the two sides of the stiffening beam.

4. The sidespan consolidation-tower beam semi-floating hybrid system concrete beam cable-stayed bridge of claim 1, which is characterized in that: the bridge tower is provided with at least one bridge tower, two sides of each bridge tower in the transverse bridge direction are connected with the stiffening girder through a plurality of pairs of stay cables, and each pair of stay cables is respectively connected with two sides of the stiffening girder in the longitudinal bridge direction.

5. The sidespan consolidation-tower beam semi-floating hybrid system concrete beam cable-stayed bridge of claim 4, which is characterized in that: the stay cables positioned on the two sides of the transverse bridge of the bridge tower are symmetrically arranged relative to the bridge tower.

6. the side span consolidation-tower beam semi-floating hybrid system concrete beam cable-stayed bridge according to claim 4 or 5, characterized in that: and the stay cables which are positioned at the same side and are positioned in the stiffening beam transverse bridge are equidistantly arranged along the bridge direction along the connecting points of the stiffening beams along the stay cables which are positioned at the same side in the stiffening beam transverse bridge direction.

7. The side span consolidation-tower beam semi-floating hybrid system concrete beam cable-stayed bridge according to claim 4 or 5, characterized in that: and the stay cables which are positioned at the same side of the stiffening beam transverse bridge and are positioned at the same side of the stiffening beam transverse bridge along the bridge direction and the connection points of the bridge tower are arranged at equal intervals in the height direction of the bridge tower.

8. The sidespan consolidation-tower beam semi-floating hybrid system concrete beam cable-stayed bridge of claim 1, which is characterized in that: each group of side span piers comprises at least two side span piers, one side span pier close to the bridge tower is fixedly connected with the stiffening girder, one side span pier far away from the bridge tower is provided with a support, and the stiffening girder is supported on the support of the side span pier.

9. The sidespan consolidation-tower beam semi-floating hybrid system concrete beam cable-stayed bridge of claim 1, which is characterized in that: the bridge tower is arranged on a tower pier foundation, and the side span bridge pier is arranged on a side pier foundation.

Technical Field

The invention belongs to the technical field of concrete beam bridge construction, and particularly relates to a side span consolidation-tower beam semi-floating hybrid system concrete beam cable-stayed bridge.

Background

The concrete beam cable-stayed bridge is widely applied in bridge construction due to the advantages of convenient construction, low anticorrosion maintenance cost, low construction cost and the like, and the existing structural system mainly has four forms: 1. the tower pier is consolidated at the tower column, the tower beam is separated, and except that the stiffening beam is supported by a support at the side pier (and the auxiliary pier), the rest of the stiffening beam is a floating system which is suspended by a stay cable; 2. on the basis of the floating system, a semi-floating system of a vertical support supporting stiffening beam which moves in the longitudinal direction is arranged on a lower beam of the bridge tower; 3. the stiffening beam is supported by a support at the side pier (and the auxiliary pier), and the tower beam at the tower column is fixedly connected and provided with a fixed support and a fixed system on the stiffening beam; 4. the tower beam piers at the tower column are mutually consolidated, and the stiffening beam is provided with a rigid frame system supported by a support at the side pier (and the auxiliary pier). However, the concrete beam cable-stayed bridge always has the problem that the vertical residual creep deformation of the stiffening beam is large.

Because highway operation has no relevant requirements for vertical residual creep deformation of a stiffening beam of a concrete beam cable-stayed bridge, the concrete beam cable-stayed bridge on domestic and foreign roads is widely applied, such as Wuhan Yangtze river two-bridge. The domestic large-span railway concrete beam cable-stayed bridge is still in a development stage, the main bridge of the Oujiang grand bridge of the established Leqing harbor branch railway is a domestic first large-span concrete beam cable-stayed bridge which is a single-track railway concrete beam cable-stayed bridge with a main span of 300m, and the design speed is 120km/h, mainly because the vertical residual creep deformation of the stiffening girder is large, the later-stage train operation comfort level and safety can be influenced, therefore, the railway bridge has higher requirements on the vertical residual creep deformation of the stiffening girder and generally does not exceed 20mm, and the concrete beam cable-stayed bridge of the existing structural system is difficult to meet the requirements.

Disclosure of Invention

In order to overcome the defects in the prior art, the invention aims to provide a side span consolidation-tower beam semi-floating hybrid system concrete beam cable-stayed bridge, which can solve the problem that the stiffening beam of the concrete beam cable-stayed bridge has higher vertical residual creep deformation and promote the popularization and application of the concrete beam cable-stayed bridge in the field of railway bridge construction.

In order to achieve the purpose, the technical scheme of the invention is a side span consolidation-tower beam semi-floating hybrid system concrete beam cable-stayed bridge, which comprises a bridge tower, a stay cable, a stiffening beam and two groups of side span piers positioned at two ends of the stiffening beam; each group of side span bridge piers comprises at least one side span bridge pier; the bridge tower is provided with a support, and the middle part of the stiffening beam is supported on the support; two ends of the stiffening beam are respectively supported on two groups of side-span piers, and at least one side-span pier in each group of side-span piers is fixedly connected with the stiffening beam; and an inclined cable is arranged between the bridge tower and the stiffening beam, and two ends of the inclined cable are respectively connected with the bridge tower and the stiffening beam.

Furthermore, the bridge tower comprises a tower pier and tower columns, the tower columns are arranged on two sides of the stiffening beam, and the bottom of each tower column is fixedly connected with the tower pier; the support is fixed on the tower pier, and the top of the stay cable is connected with the top of the tower column.

Furthermore, the tower columns on two sides of the stiffening beam are provided with limiting blocks for limiting the stiffening beam to move along the transverse bridge direction.

Furthermore, there is at least one bridge tower, and both sides of each bridge tower in the transverse bridge direction are connected with the stiffening girder through a plurality of pairs of stay cables, and each pair of stay cables is respectively connected with both sides of the stiffening girder in the longitudinal bridge direction.

Furthermore, the stay cables positioned on the two sides of the transverse bridge of the bridge tower are symmetrically arranged relative to the bridge tower.

Furthermore, the stay cables which are positioned on the same side of the stiffening beam transverse bridge and positioned on the same side of the stiffening beam along the bridge are equidistantly arranged along the bridge direction with the connection points of the stiffening beams.

Furthermore, the stay cables which are positioned on the same side of the stiffening beam transverse bridge in the same direction and on the same side of the stiffening beam along the bridge are equidistantly arranged with the connecting point of the bridge tower along the height direction of the bridge tower.

Furthermore, each group of side-span piers comprises at least two side-span piers, one side-span pier close to the bridge tower is fixedly connected with the stiffening beam, one side-span pier far away from the bridge tower is provided with a support, and the stiffening beam is supported on the support of the side-span pier.

Further, the bridge tower is arranged on a tower pier foundation, and the side span pier is arranged on a side pier foundation.

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

(1) The invention adopts the combination of the side-span bridge pier and the stiffening girder for consolidation, and the support is arranged on the bridge tower for supporting the stiffening girder to form a side-span consolidation-tower girder semi-floating mixed system, and the stress performance and the vertical residual creep deformation of the stiffening girder are improved by the flexible constraint action of the side-span bridge pier on the stiffening girder, thereby meeting the railway driving requirement;

(2) At least one side span bridge pier in each side span bridge pier of the side span consolidation-tower beam semi-floating mixed system concrete beam cable-stayed bridge is consolidated with the stiffening beam, so that the number of bridge supports can be saved, the construction cost is reduced, and the later-period anticorrosion maintenance cost is reduced;

(3) the side span consolidation-tower beam semi-floating hybrid system concrete beam cable-stayed bridge has the advantages of large structural rigidity, convenience in construction, low anticorrosion maintenance cost, low construction cost and the like;

(4) The side span consolidation-tower beam semi-floating hybrid system concrete beam cable-stayed bridge further widens the application range of the concrete beam cable-stayed bridge, and can effectively promote the popularization and application of the concrete beam cable-stayed bridge in the railway bridge construction field.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

fig. 1 is a schematic structural diagram of a side span consolidation-tower beam semi-floating hybrid system concrete beam cable-stayed bridge provided by an embodiment of the invention;

FIG. 2 is a schematic cross-sectional view of a bridge tower of a side span consolidation-tower beam semi-floating hybrid system concrete beam cable-stayed bridge according to an embodiment of the invention;

In the figure: 1. the side span bridge comprises a side span bridge pier 11, a side pier foundation 2, a stiffening beam 3, a bridge tower 31, a tower column 32, a tower pier 33, a limiting block 34, a tower pier foundation 4, a stay cable 5 and a support.

Detailed Description

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

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

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; in the description of the present invention, "a plurality" means two or more unless otherwise specified.

As shown in fig. 1-2, an embodiment of the present invention provides a side span consolidation-tower beam semi-floating hybrid system concrete beam cable-stayed bridge, including a bridge tower 3, a stay cable 4, a stiffening beam 2, and two sets of side span piers located at two ends of the stiffening beam 2; each group of side span piers comprises at least one side span pier 1; the bridge tower 3 is provided with a support 5, and the middle part of the stiffening beam 2 is supported on the support 5; two ends of a stiffening beam 2 are respectively supported on two groups of side-span piers, and at least one side-span pier 1 in each group of side-span piers is fixedly connected with the stiffening beam 2; an inclined stay cable 4 is arranged between the bridge tower 3 and the stiffening girder 2, and two ends of the inclined stay cable 4 are respectively connected with the bridge tower 3 and the stiffening girder 2. The invention adopts the side-span bridge pier 1 and the stiffening beam 2 to be consolidated, the bridge tower 3 is provided with the support 5 to support the stiffening beam 2 to form a side-span consolidation-tower beam semi-floating mixed system, when the side-span bridge pier 1 works, the side-span bridge pier 1 can bear the axial and vertical acting force and the induced bending moment of the stiffening beam 2, and the side-span bridge pier 1 can flexibly restrain the stiffening beam 2, thereby effectively improving the stress performance and the vertical residual creep deformation of the stiffening beam 2, meeting the railway driving requirement and further widening the application range of the concrete beam cable-stayed bridge; and at least one side span pier 1 in each group of side span piers at two ends of the stiffening beam 2 is fixedly connected with the stiffening beam 2, so that the number of bridge supports 5 can be saved, the construction cost is reduced, and the later-stage anticorrosion maintenance cost is reduced.

Specifically, the bridge tower 3 in this embodiment includes a tower pier 32 and tower columns 31, the tower columns 31 are disposed on both sides of the stiffening beam 2, and the bottom of each tower column 31 is fixedly connected to the tower pier 32; the support 5 is fixed on the tower pier 32, and the stiffening beam 2 is supported on the support 5; the top of the stay cable 4 is connected with the top of the tower column 31, and the bottom of the stay cable is connected with the stiffening beam 2; the top of each column 31 is fixed, and the number of the columns 31 may be two or four. In the embodiment, the bridge tower 3 and the stiffening beam 2 are connected through the support 5 to form a semi-floating system, the number of the bridge tower 3 is not limited, the bridge tower can be arranged according to specific conditions, and various types of supports 5 can be adopted, such as a longitudinal movable support or a fixed support. Optimally, the tower columns 31 on two sides of the stiffening beam 2 are respectively provided with a limiting block 33 for limiting the stiffening beam 2 to move along the transverse bridge direction, as shown in fig. 2, the limiting blocks 33 on the tower columns 31 on two sides limit the stiffening beam 2 to move along the transverse bridge direction, and the stability of railway travelling is ensured.

Specifically, in this embodiment, there is at least one bridge tower 3, and the lateral both sides of each bridge tower 3 are all connected with stiffening beam 2 through a plurality of pairs of stay cables 4, and each pair of stay cables 4 is connected with stiffening beam 2 along the lateral both sides of bridge respectively, and it is even to guarantee that the lateral both sides of stiffening beam 2 are stressed. Furthermore, the stay cables 4 positioned on the two sides of the bridge tower 3 in the transverse direction are symmetrically arranged relative to the bridge tower 3, so that the stiffening beams on the two sides of the bridge tower 3 in the transverse direction are uniformly stressed; further, as shown in fig. 1, the connection points of the stay cables 4 and the stiffening beams 2 located on the same side of the stiffening beam 2 in the transverse direction of the bridge and located on the same side of the stiffening beam 2 in the longitudinal direction of the bridge are arranged at equal intervals in the longitudinal direction of the bridge; as shown in fig. 2, the connection points of the stay cables 4 and the pylons 3, which are located on the same side of the stiffening beams 2 in the transverse direction of the bridge and on the same side of the stiffening beams 2 in the bridge direction, are arranged at equal intervals in the height direction of the pylon 3.

In this embodiment, the side span pier group of the cable-stayed bridge is fixedly connected with the stiffening girder 2, the number of the piers in the side span is not limited, and a single pier or a plurality of piers can be adopted to be fixedly connected with the stiffening girder 2. Optimally, each group of side-span piers comprises at least two side-span piers 1, one side-span pier 1 close to the bridge tower 3 in the side-span piers 1 is fixedly connected with a stiffening beam 2, one side-span pier 1 far away from the bridge tower 3 is provided with a support 5, and the stiffening beam 2 is fixedly supported on the support 5 of the side-span pier 1; as shown in fig. 1, the two sets of side-span piers each include two side-span piers 1, wherein one side-span pier 1 close to the bridge tower 3 is fixedly connected with a stiffening beam 2, and one side-span pier 1 far away from the bridge tower 3 supports the stiffening beam 2 through a support. Further, the bridge tower 3 is disposed on the tower pier foundation 34, the side span pier 1 is disposed on the side pier foundation 11, and the tower pier foundation 34 and the side pier foundation 11 may be a pile foundation or an enlarged foundation, or the like.

the structure of the side span consolidation-tower beam semi-floating hybrid system concrete beam cable-stayed bridge is simple, novel and attractive, convenient to construct, economical and applicable, has the advantages of high structural rigidity, convenience in construction, low maintenance cost and the like, can effectively improve the stress performance and the vertical residual creep deformation of the stiffening beam 2 of the cable-stayed bridge, meets the railway driving requirement, and can effectively promote the popularization and application of the concrete beam cable-stayed bridge in the railway bridge construction field.

the above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.