CN110565501A - Side span consolidation-tower beam semi-floating mixed system concrete beam cable-stayed bridge - Google Patents

Abstract

The invention belongs to the technical field of concrete girder bridge construction, and in particular relates to a concrete girder cable-stayed bridge with a side-span consolidation-tower girder semi-floating hybrid system, including bridge towers, cable-stayed cables, stiffening beams and two bridges located at both ends of the stiffening beams. A set of side-span piers; each set of side-span piers includes at least one side-span pier; a support is provided on the bridge tower, and the middle part of the stiffening beam is supported on the support; the two ends of the stiffening beam are respectively supported on two sets of side-span piers In each group of side-span piers, at least one side-span pier is consolidated with the stiffening girder; there is a stay cable between the bridge tower and the stiffening girder, and the two ends of the stay cable are respectively connected to the bridge tower connected to stiffening beams. The invention adopts side-span piers and stiffening beams to be consolidated, and bridge towers are equipped with supports to support stiffening beams to form a side-span consolidation-tower girder semi-floating hybrid system, and improves the stability of the stiffening beams through the flexible restraint of side-span bridge piers on the stiffening beams. The mechanical performance and vertical residual creep deformation meet the requirements of railway operation.

Description

A concrete girder cable-stayed bridge with side-span consolidation-tower-beam semi-floating hybrid system

technical field

The invention belongs to the technical field of concrete girder bridge construction, in particular to a concrete girder cable-stayed bridge with a side-span consolidation-tower girder semi-floating hybrid system.

Background technique

Concrete girder cable-stayed bridges are widely used in bridge construction due to their advantages of convenient construction, low cost of anti-corrosion and maintenance, and low engineering cost. The beams are separated, except that the stiffened beams are supported by supports on the side piers (and auxiliary piers), the rest are all suspended by cable-stayed floating systems; 3. The stiffened beam is supported by supports on the side piers (and auxiliary piers), and the tower beam is consolidated at the tower column, and fixed supports are set to support the reinforcement on the stiffened beam. System; 4. A rigid frame system in which the tower beams and piers at the tower columns are mutually consolidated, and the stiffening beams are supported by supports at the side piers (and auxiliary piers). However, the concrete girder cable-stayed bridge has always had the problem of large vertical residual creep deformation of the stiffened girder.

Since the road operation has no relevant requirements for the vertical residual creep deformation of the stiffening girder of concrete girder cable-stayed bridges, domestic and foreign highway concrete girder cable-stayed bridges are widely used, such as the Second Yangtze River Bridge in Wuhan. However, the domestic long-span railway concrete girder cable-stayed bridge is still in the development stage. The main bridge of the Oujiang Super Bridge of the Yueqing Port Branch Railway under construction is the first long-span concrete girder cable-stayed bridge in China. The design speed of the bridge is 120km/h, mainly because the vertical residual creep deformation of the stiffened beam is relatively large, which will affect the comfort and safety of train operation in the later stage. Therefore, railway bridges have higher requirements for the vertical residual creep deformation of the stiffened beam. Generally no more than 20mm, the concrete girder cable-stayed bridge with the existing structural system is difficult to meet this requirement.

Contents of the invention

In order to overcome the deficiencies in the prior art mentioned above, the object of the present invention is to provide a concrete girder cable-stayed bridge with side-span consolidation-tower girder semi-floating hybrid system, which can solve the vertical residual creep deformation of the stiffening girder of the concrete girder cable-stayed bridge Higher problems promote the promotion and application of concrete girder cable-stayed bridges in the field of railway bridge construction.

In order to achieve the above object, the technical solution of the present invention is a concrete girder cable-stayed bridge with a side-span consolidation-tower girder semi-floating hybrid system, including bridge towers, cable-stayed cables, stiffening beams, and two sets of bridges located at both ends of the stiffening beams. Side-span bridge piers; each group of side-span bridge piers includes at least one side-span bridge piers; a support is provided on the bridge tower, and the middle part of the stiffening beam is supported on the support; the two ends of the stiffening beam are respectively supported on On two sets of side-span piers, at least one side-span pier in each set of side-span piers is consolidated with the stiffening beam; stay cables are arranged between the bridge tower and the stiffening beam, and the stay cables The two ends of the bridge are respectively connected with the bridge tower and the stiffening beam.

Further, the bridge tower includes tower piers and tower columns, tower columns are arranged on both sides of the stiffened beam, and the bottom of each tower column is consolidated with the tower piers; the support is fixed on the On the tower pier, the top of the stay cable is connected to the top of the tower column.

Furthermore, the pylons on both sides of the stiffened beam are provided with limiting blocks for limiting the movement of the stiffened beam along the transverse bridge.

Further, there is at least one pylon, and the two sides of each pylon in the transverse bridge direction are connected to the stiffening beam through multiple pairs of stay cables, and each pair of stay cables is respectively connected to the two sides of the stiffening beam along the bridge direction. side connection.

Furthermore, the stay cables on both sides of the cross bridge of the bridge tower are arranged symmetrically with respect to the bridge tower.

Furthermore, the connection points between the stay cables and the stiffening beams located on the same side of the stiffening beam transverse bridge and on the same side of the stiffening beam along the bridge are arranged at equal intervals along the bridge direction.

Furthermore, the connection points between the stay cables on the same side of the stiffening girder transverse bridge and the stiffening girder along the same side of the bridge and the bridge tower are arranged equidistantly along the height direction of the bridge tower.

Further, each group of side-span piers includes at least two side-span piers, and among the side-span piers, one side-span pier close to the bridge tower is consolidated with the stiffening beam, and one of the side-span piers away from the bridge tower A support is provided on the side-span pier, and the stiffening beam is supported on the support of the side-span pier.

Further, the bridge tower is set on the tower pier foundation, and the side-span bridge pier is set on the side pier foundation.

Compared with prior art, the beneficial effect of the present invention:

(1) The present invention adopts side-span bridge piers and stiffening beams to be consolidated, and bridge towers are equipped with supports to support the stiffening beams to form a side-span consolidation-tower girder semi-floating hybrid system. Through the flexible restraint of side-span bridge piers on stiffening beams, Improve the mechanical performance and vertical residual creep deformation of the stiffened beam to meet the requirements of railway traffic;

(2) At least one side-span pier in each set of side-span piers of the concrete girder cable-stayed bridge of the side-span consolidation-tower girder semi-floating hybrid system is consolidated with the stiffening beam, which can save the number of bridge supports and reduce engineering costs. Cost, reduce post-corrosion maintenance costs;

(3) The concrete girder cable-stayed bridge with side-span consolidation-tower girder semi-floating hybrid system of the present invention has the advantages of high structural rigidity, convenient construction, low cost of anti-corrosion and maintenance, and low engineering cost;

(4) The concrete girder cable-stayed bridge with side-span consolidation-tower girder semi-floating hybrid system further broadens the scope of application of concrete girder cable-stayed bridges, and can effectively promote the promotion of concrete girder cable-stayed bridges in the field of railway bridge construction and apply.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is the structural representation of the concrete girder cable-stayed bridge with side-span consolidation-tower beam semi-floating hybrid system provided by the embodiment of the present invention;

Fig. 2 is the cross-sectional schematic diagram of the pylon of the concrete girder cable-stayed bridge of side-span consolidation-tower beam semi-floating hybrid system provided by the embodiment of the present invention;

In the figure: 1. side-span bridge pier, 11. side pier foundation, 2. stiffening beam, 3. bridge tower, 31. tower column, 32. tower pier, 33. limit block, 34. tower pier foundation, 4. oblique Cable, 5, bearing.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

In describing the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", The orientations or positional relationships indicated by "top", "bottom", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying References to devices or elements must have a particular orientation, be constructed, and operate in a particular orientation and therefore should not be construed as limiting the invention.

The terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of these features; in the description of the present invention, unless otherwise specified, the meaning of "plurality" is two or more.

As shown in Figures 1-2, the embodiment of the present invention provides a concrete girder cable-stayed bridge with a side-span consolidation-tower beam semi-floating hybrid system, including a bridge tower 3, a stay cable 4, a stiffening beam 2 and a Two groups of side-span bridge piers at both ends of the stiffening beam 2; each group of side-span bridge piers includes at least one side-span bridge pier 1; a support 5 is provided on the bridge tower 3, and the middle part of the stiffening beam 2 is supported on the support 5; The two ends are respectively supported on two sets of side-span piers, and at least one side-span pier 1 in each set of side-span piers is consolidated with the stiffening beam 2; stay cables 4 are arranged between the bridge tower 3 and the stiffening beam 2, and the oblique Both ends of the stay cable 4 are respectively connected with the bridge tower 3 and the stiffening beam 2 . In the present invention, the side-span pier 1 is consolidated with the stiffening beam 2, and the bridge tower 3 is equipped with a support 5 to support the stiffening beam 2 to form a side-span consolidation-tower girder semi-floating hybrid system. During operation, the side-span pier 1 can bear the stiffening The axial and vertical forces of the beam 2 and the resulting bending moment, and through the flexible restraint of the side-span bridge pier 1 on the stiffened beam 2, effectively improve the mechanical performance and vertical residual creep deformation of the stiffened beam 2 to meet the requirements of railway traffic. Requirements further broaden the scope of application of concrete girder cable-stayed bridges; and at least one side-span pier 1 in each group of side-span piers at both ends of the stiffened beam 2 is consolidated with the stiffened beam 2, which can save the number of bridge supports 5 and reduce Lower project cost and reduce post-corrosion maintenance costs.

Specifically, the bridge tower 3 in this embodiment includes a tower pier 32 and a tower column 31, and both sides of the stiffening beam 2 are provided with a tower column 31, and the bottom of each tower column 31 is consolidated with the tower pier 32; the support 5 Fixed on the tower pier 32, the stiffening beam 2 is supported on the support 5; the top of the stay cable 4 is connected to the top of the tower column 31, and the bottom is connected to the stiffening beam 2; the top of each tower column 31 is consolidated, and the tower column 31 It could be two, it could be four. In this embodiment, bridge towers 3 and stiffening beams 2 are connected through supports 5 to form a semi-floating system. The number of bridge towers 3 is not limited, and can be set according to specific conditions, and various types of supports 5 can be used, such as longitudinal movable supports seat or fixed support etc. Optimally, the pylons 31 on both sides of the stiffening beam 2 are provided with limiting blocks 33 for limiting the movement of the stiffening beam 2 along the transverse direction, as shown in FIG. The movement of the stiffening beam 2 in the direction of the cross bridge is restricted to ensure the stability of the railway running.

Specifically, in this embodiment, there is at least one bridge tower 3, and each bridge tower 3 is connected to the stiffening beam 2 through multiple pairs of stay cables 4 on both sides of the bridge direction, and each pair of stay cables 4 is connected to the stiffening beam respectively. 2 The two sides along the bridge direction are connected to ensure that the stress on both sides of the stiffening beam 2 across the bridge direction is even. Further, the stay cables 4 located on both sides of the bridge tower 3 are arranged symmetrically with respect to the bridge tower 3 to ensure that the stiffening beams on both sides of the bridge tower 3 are evenly stressed; further, as shown in Figure 1, the The connection points of the stiffening beam 2 on the same side of the transverse bridge and the stiffening beam 2 along the same side of the bridge and the stiffening beam 2 are arranged at equal intervals along the direction of the bridge; as shown in Figure 2, the stiffening beam 2 Stiffening beams located on the same side of the cross bridge 2 along the same side of the bridge The connection points of the stay cables 4 and the bridge tower 3 are arranged equidistantly along the height direction of the bridge tower 3 .

In this embodiment, the side-span pier groups of the cable-stayed bridge are consolidated with the stiffening girder 2 , and the number of pier inside the side-span is not limited, and a single pier or multiple piers may be consolidated with the stiffening girder 2 . Optimally, each group of side-span piers includes at least two side-span piers 1, and among the side-span piers 1, one side-span pier 1 close to the bridge tower 3 is consolidated with the stiffening beam 2, and one side-span bridge pier away from the bridge tower 3 There is a support 5 on the pier 1, and the stiffening girder 2 is consolidated and supported on the support 5 of the side-span pier 1; as shown in Fig. A side-span pier 1 of 3 is consolidated with the stiffening beam 2, and a side-span pier 1 away from the bridge tower 3 supports the stiffening beam 2 through a support. Further, the bridge tower 3 is arranged on the tower pier foundation 34, and the side-span bridge pier 1 is arranged on the side pier foundation 11, and the tower pier foundation 34 and the side pier foundation 11 can be pile foundations or enlarged foundations.

The concrete girder cable-stayed bridge with side-span consolidation-tower girder semi-floating hybrid system in this embodiment is simple in structure, novel and beautiful, convenient for construction, economical and applicable, and has the advantages of high structural rigidity, convenient construction, and low maintenance cost. It can effectively improve the mechanical performance and vertical residual creep deformation of the stiffening girder 2 of the cable-stayed bridge, meet the requirements of railway traffic, and effectively promote the popularization and application of the concrete girder cable-stayed bridge in the field of railway bridge construction.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of the present invention. within the scope of protection.

Claims (9)

1. A side-span consolidation-tower girder semi-floating hybrid system concrete girder cable-stayed bridge, comprising bridge towers, cable-stayed cables, stiffening beams and two groups of side-span piers positioned at the two ends of the stiffening beam; each group of side-span piers It includes at least one side-span pier; it 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; the two ends of the stiffening beam are respectively supported on two sets of side-span piers In each group of side-span piers, at least one side-span pier is consolidated with the stiffened girder; there is a stay cable between the bridge tower and the stiffened girder, and the two ends of the stay cable are respectively connected to the stiffened beam. The pylons are connected to the stiffening beams. 2. A kind of side-span consolidation-tower beam semi-floating hybrid system concrete girder cable-stayed bridge as claimed in claim 1, characterized in that: said bridge tower comprises tower piers and tower columns, and the two sides of said stiffening beam Tower columns are all provided, and the bottom of each tower column is consolidated 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. 3. A side-span consolidation-tower girder semi-floating hybrid system concrete girder cable-stayed bridge as claimed in claim 2, characterized in that: the pylons on both sides of the stiffening beam are provided with a structure for limiting the stiffening. Limiting block for the movement of the beam along the transverse bridge. 4. A side-span consolidation-tower beam semi-floating hybrid system concrete girder cable-stayed bridge as claimed in claim 1, characterized in that: said bridge tower has at least one, and each bridge tower cross-bridge direction both sides They are all connected to the stiffening beam through multiple pairs of stay cables, and each pair of stay cables is respectively connected to both sides of the stiffening beam along the bridge direction. 5. A kind of side-span consolidation-tower girder semi-floating mixed system concrete girder cable-stayed bridge as claimed in claim 4, characterized in that: the stay cables positioned on both sides of the pylon transverse bridge are relatively to the The bridge towers are arranged symmetrically. 6. A side-span consolidation-tower girder semi-floating hybrid system concrete girder cable-stayed bridge as claimed in claim 4 or 5, characterized in that: the stiffening beams located on the same side of the stiffening girder cross bridge The connection points between the stay cables on the same side of the beam along the bridge and the stiffening beam are arranged at equidistant intervals along the direction of the bridge. 7. A side-span consolidation-tower girder semi-floating hybrid system concrete girder cable-stayed bridge as claimed in claim 4 or 5, characterized in that: the stiffening beams located on the same side as the stiffening girder cross bridge The connection points between the stay cables on the same side of the Liangshun Bridge and the bridge towers are arranged equidistantly along the height direction of the bridge towers. 8. A side-span consolidation-tower girder semi-floating hybrid system concrete girder cable-stayed bridge as claimed in claim 1, characterized in that: each set of side-span piers comprises at least two side-span piers, and the side-span piers Among the bridge piers, a side-span bridge pier close to the bridge tower is consolidated with the stiffening girder, a side-span bridge pier away from the bridge tower is provided with a support, and the stiffening beam is supported on the side-span bridge pier on the stand. 9. A concrete girder cable-stayed bridge with side-span consolidation-tower beam semi-floating hybrid system as claimed in claim 1, characterized in that: the bridge tower is arranged on the tower pier foundation, and the side-span bridge pier is arranged on side pier foundation.