CN207259940U - A kind of structural system of combined highway and metro multi pylon cable stayed bridge - Google Patents

Abstract

The utility model provides a kind of structural system of combined highway and metro multi pylon cable stayed bridge, including multiple steel construction bridge towers, and the multiple steel construction bridge tower includes middle tower 1 and Bian Ta 2；The middle tower 1 is using tower Liang Dun consolidations；The side tower 2 is separated using tower beam consolidation, tower pier, and pier top sets double bearing.The utility model is consolidated by using tower Liang Dun, side tower is using tower beam consolidation, the separated structural system of tower pier, railway, highway driving are met to the demand of rigidity, reduce long connection temperature effect, reduce bridge tower and basic scale, project cost is saved, there is good economy and easy for construction.

Description

A Structural System of Multi-tower Cable-Stayed Bridge Built by Highway and Railway

technical field

The utility model relates to the technical field of bridge engineering, in particular to a structural system of a multi-tower cable-stayed bridge built together with highways and railways.

Background technique

Compared with conventional cable-stayed bridges, multi-tower cable-stayed bridges have multi-tower-long layouts; with the increase in the number of cable-stayed bridges, there are no auxiliary piers and transition piers on both sides of the middle towers of multi-tower cable-stayed bridges, and there are no end piers. Anchor cables, lack of effective help to the stiffness of the main girder and tower, make the already flexible structure of the cable-stayed bridge more flexible, resulting in the deflection of the main girder, the fatigue stress amplitude of the cable stays and the internal force of the tower bottom of the multi-tower cable-stayed bridge Much larger than conventional cable-stayed bridges.

Moreover, as the length of the main girder increases, the influence of the temperature effect increases; especially for the cable tower, the change of temperature will form a "drag" effect on the side tower, and improper treatment of the temperature effect will cause the internal force at the bottom of the side tower If it is too large, it will increase the design difficulty of the main force-bearing components such as cable towers and foundations.

In the prior art, in view of the mechanical characteristics of multi-tower cable-stayed bridges, if a conventional semi-floating system is adopted, in order to meet the rigidity requirements, the middle tower should be designed as a rigid tower with sufficient rigidity, and at the same time, the side towers should be designed as rigid towers with sufficient stiffness. Due to the "drag" effect of the bridge, the foundation bears a large force, so the scale of the bridge tower and the foundation is large, which increases the project cost and is less economical.

Utility model content

Aiming at the above-mentioned defects in the prior art, the utility model provides a structural system of a multi-tower cable-stayed bridge built together with highways and railways.

The utility model provides a structural system of a multi-tower cable-stayed bridge built together by highway and railway, which includes a plurality of steel structure bridge towers, and the plurality of steel structure bridge towers include a middle tower 1 and a side tower 2; the middle tower 1 adopts Tower girder piers are consolidated; the side tower 2 is consolidated with tower girders and tower piers are separated, and double-row supports are arranged on the top of the pier.

Wherein, the consolidation of the middle tower 1 with a tower girder pier further includes: the middle tower 1 and the steel box girder 3 are consolidated with a tower beam; the steel box girder 3 corresponding to the middle tower 1 is provided with a diaphragm 4 inside, The two transverse diaphragms 4 corresponding to the same tower limb 5 correspond to the front and rear wall panels of the tower limb 5 in the longitudinal direction, and the side wall panels of the tower limb 5 correspond to the web plates of the steel box girder 3; corresponding to the same A box chamber 6 is formed between the two transverse diaphragms 4 of the tower limb 5 and the two webs of the steel box girder 3 , and the box chamber 6 protrudes a certain distance from the bottom of the beam and is buried in the pier 7 .

Wherein, the side tower 2 is consolidated with a tower beam and the tower pier is separated, and the double-row support is arranged on the top of the pier, which further includes: the side tower 2 and the steel box girder 3 are consolidated with a tower beam; A plurality of diagonal braces 8 are arranged inside the steel box girder 3, and supports 10 are respectively arranged under the two steel beam side boxes 9 of the steel box girder 3; The lower end of the support 10 is connected to the upper end of the pier 7 .

Wherein, concrete is poured into the part of the box chamber 6 between the pier 7 and the steel box girder 3 .

Wherein, the bridge pier 7 is provided with anchoring steel beams; the anchoring steel beams are provided with shear studs, PBL shear keys and multiple stiffening plates.

Wherein, the diaphragm 4 is a solid-belly diaphragm.

The structure system of the multi-tower cable-stayed bridge built together by highway and railway provided by the utility model satisfies the rigidity requirements of railway and road traffic by adopting the structure system of tower girder pier consolidation, side towers using tower beam consolidation and tower pier separation. It reduces the temperature effect of the long-term connection, reduces the size of the bridge tower and the foundation, saves the project cost, and has the characteristics of good economy and convenient construction.

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 accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the appended drawings in the following description The drawings show some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creative work.

Fig. 1 is the structural representation of the structural system of the multi-tower cable-stayed bridge built together by highway and railway provided by the embodiment of the utility model;

Fig. 2 is the side structure schematic diagram of the consolidation of the tower girder piers of the structure system of the multi-tower cable-stayed bridge built together by highway and railway provided by the embodiment of the utility model;

Fig. 3 is the cross-sectional structure schematic diagram of the consolidation of the tower girder pier of the structure system of the multi-tower cable-stayed bridge built together by highway and railway provided by the embodiment of the utility model;

Fig. 4 is the side structure schematic diagram of the tower beam consolidation and tower pier separation of the structural system of the multi-tower cable-stayed bridge built together by highway and railway provided by the embodiment of the utility model;

Fig. 5 is the schematic diagram of the cross-sectional structure of tower beam consolidation and tower pier separation of the structural system of the multi-tower cable-stayed bridge built together by road and railway provided by the embodiment of the utility model;

In the figure: 1: middle tower; 2: side tower; 3: steel box girder; 4: diaphragm; 5: tower leg; 6: box room; 7: pier; 8: diagonal brace; ; 10: support.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described implementation Example is a part of embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

In the description of the embodiments of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", " The orientation or positional relationship indicated by "outside" and so on is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the embodiment of the present utility model and simplifying the description, rather than indicating or implying that the referred device or element must have a specific Orientation, construction and operation in a particular orientation, therefore, should not be construed as limiting the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and should not be construed as indicating or implying relative importance.

In the description of the embodiments of the present utility model, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a It is a detachable connection or an integral connection; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediary, and it may be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the embodiments of the present invention in specific situations.

Fig. 1 is the structural representation of the structural system of the multi-tower cable-stayed bridge built together by highway and railway provided by the embodiment of the utility model, as shown in Fig. Tower 1 and side towers 2; the middle tower 1 is consolidated with tower beam piers; the side tower 2 is consolidated with tower beams and tower piers are separated, and double-row supports are arranged on the top of the piers.

Among them, the cable-stayed bridge, also known as the cable-stayed bridge, is a bridge in which the main girder is directly pulled on the bridge tower by many cables; It can be regarded as a multi-span elastically supported continuous beam with cables instead of buttresses; it can reduce the bending moment in the beam body, reduce the height of the building, reduce the weight of the structure, and save materials.

Among them, the middle tower refers to the bridge tower located in the middle of the bridge, and the side tower refers to the bridge towers located on both sides of the bridge; The spacing is 340m), the two bridge towers in the middle are the middle towers; the two bridge towers on both sides are the side towers.

Specifically, the structural system of the highway-rail multi-tower cable-stayed bridge provided by the embodiment of the utility model adopts a rigid frame continuous system, that is, the middle tower is consolidated with tower girder piers, the side towers are consolidated with tower beams, and the tower piers are separated. Double-row supports are arranged on the top of the pier, and the layout is shown in Figure 1; through the double-row supports, the relative rotational freedom between the bridge tower and the steel box girder is restricted to improve the stress of the multi-tower cable-stayed bridge; and , the double-row support not only provides the vertical restraint to the beam, but also provides the rotational restraint to the beam; it reduces the temperature effect of long joints.

It should be noted that for a cable-stayed bridge built together with highways and railways, if all bridge towers are consolidated with tower beams and double-row supports are set between tower piers, measures such as increasing the stiffness of bridge towers and main girders will The overall rigidity of the structure is improved, but it is still difficult to meet the rigidity requirements of railways and highways, and all double-row supports are installed. The excessive force on the fixed pier will increase the difficulty of design. Therefore, the embodiment of the utility model is set as the above-mentioned continuous rigid structure system.

The structure system of the multi-tower cable-stayed bridge built by highway and railway combined by the embodiment of the utility model adopts the structure system of tower girder pier consolidation, side towers adopt tower beam consolidation, and tower pier separation, which meets the requirements of railway and highway traffic. The demand for rigidity reduces the temperature effect of long joints, reduces the scale of bridge towers and foundations, saves engineering costs, and has the characteristics of good economy and convenient construction.

On the basis of any of the above-mentioned embodiments, the consolidation of the middle tower 1 using a tower girder pier further includes: the middle tower 1 and the steel box girder 3 are consolidated with a tower beam; the steel box girder corresponding to the middle tower 1 3 The transverse diaphragm 4 is arranged inside, and the two transverse diaphragms 4 corresponding to the same tower limb 5 correspond to the front and rear wall panels of the tower limb 5 in the longitudinal direction, and the side wall panels of the tower limb 5 and the steel box girder 3 corresponding to the web; the two diaphragms 4 corresponding to the same tower limb 5 and the two webs of the steel box girder 3 form a box chamber 6, and the box chamber 6 extends a certain distance from the bottom of the beam and is embedded in the Inside pier 7.

Among them, steel box girder, also called steel plate box girder, is a common structural form of long-span bridges. Generally used on bridges with large spans, it is called steel box girder because it looks like a box.

Among them, the diaphragm is a member arranged between the beams to maintain the cross-sectional shape and enhance the lateral stiffness; it acts on the live load distributed on the bridge.

Fig. 2 is the side structure schematic diagram of the pylon pier consolidation of the structure system of the multi-tower cable-stayed bridge built together by road and railway provided by the embodiment of the utility model; The schematic diagram of the cross-sectional structure of the tower girder pier consolidation of the structural system of the pulled bridge is shown in Figure 2 and Figure 3. The middle tower 1 and the steel box girder 3 are the tower girder consolidation used; The consolidation between them is as follows: a diaphragm 4 is installed inside the steel box girder 3, and the longitudinal distance between the two diaphragms 4 corresponding to the same tower leg 5 corresponds to the longitudinal dimension of the tower leg 5, that is, the two The longitudinal position of a diaphragm 4 corresponds to the two ends of the tower limb 5 in the longitudinal direction; for example, if the longitudinal dimension of the tower limb 5 is 3.6m, then two diaphragms 4 are arranged at both ends in the longitudinal direction. At the corresponding position, the longitudinal distance between the two diaphragms 4 is also 3.6m; the transverse dimension of the diaphragm 4 corresponds to the width of the steel box girder 3, for example, in Figure 3, the transverse width of the diaphragm 4 is 17.6m m (the transverse diaphragm is composed of multiple plates in the transverse direction, and the sum of the widths of the multiple plates is the transverse width).

Based on the diaphragm 4 set above, two diaphragms 4 corresponding to the same tower limb 5 form two chambers 6 with a longitudinal length of 3.6 m and a transverse width of 17.6 m along the beam height direction; The bottom of the steel box girder 3 protrudes 5.8m from top to bottom, and 4m is buried in the pier 7; therefore, the consolidation of the steel box girder 3 and the pier 7 is realized through the box body 6 .

It should be noted that the dimensions involved in the embodiments of the present utility model are for illustrative purposes only, and the protection scope of the embodiments of the present utility model is not limited thereto.

On the basis of any of the above-mentioned embodiments, the side tower 2 is consolidated with a tower beam and the tower pier is separated, and a double-row support is arranged on the top of the pier, which further includes: the side tower 2 and the steel box girder 3 are consolidated with a tower beam The interior of the steel box girder 3 corresponding to the side tower 2 is provided with a plurality of diagonal braces 8, and the two steel girder side boxes 9 of the steel box girder 3 are respectively provided with a support 10; the upper end of the support 10 It is connected with the lower end of the steel girder side box 9 , and the lower end of the support 10 is connected with the upper end of the pier 7 .

Figure 4 is a schematic diagram of the side structure of the tower beam consolidation and tower pier separation of the structural system of the multi-tower cable-stayed bridge built together by highway and railway in the embodiment of the utility model; Figure 5 is the joint construction of highway and railway provided in the embodiment of the utility model Schematic diagram of the cross-sectional structure of tower girder consolidation and tower pier separation of the structural system of a multi-tower cable-stayed bridge; Separate, the pier top is provided with double rows of supports specifically: the steel box girder 3 at the corresponding position of the side tower 2 is provided with a steel girder side box 9; the part of the steel box girder 3 between the two steel girder side boxes 9 is provided with a A plurality of diagonal braces 8; corresponding to the centerline positions of the four tower limbs of the bridge tower, double-row supports 10 are arranged longitudinally under the two steel girder side boxes 9, with a distance of 10.4m and a distance of 14.7m between transverse supports; The upper end of the support 10 is connected with the lower end of the steel beam side box 9, and the lower end of the support 10 is connected with the upper end of the pier 7. The quasi-consolidated state of the main girder is realized through the above-mentioned double-row supports.

On the basis of any of the above-mentioned embodiments, the consolidation of the tower beam further includes: connecting the tower leg 5 and the steel beam side box 9 with high-strength bolts.

Specifically, regardless of the side tower or the middle tower, the four tower limbs at the lower part of the steel bridge tower and the steel girder side box are connected with high-strength bolts to form a tower-beam consolidation. Moreover, since the steel girder side box 9 is located in the middle of the bridge deck, not on both sides of the bridge deck; therefore, the bridge tower is arranged in the middle of the main girder through the connection between the tower limb 5 and the steel girder side box 9 .

For example, for a cable-stayed bridge built on the same level as a highway and railway, since the road and railway are arranged on the same level, the bridge deck is relatively large. The cost is high and the landscape effect is poor; therefore, by placing the bridge tower in the middle, the above defects are effectively solved.

On the basis of any of the above embodiments, concrete is poured into the part of the box chamber 6 between the pier 7 and the steel box girder 3 .

Specifically, for the box chamber 6 formed by the above-mentioned diaphragm 4, concrete is poured into the part of the box chamber 6 between the steel box girder 3 and the pier 7, that is, the length is 1.8m in Fig. 2 and Fig. 3 (Fig. 2 Marked as the part of the box chamber 6 of 180) among; Guaranteed the consolidation effect of tower girder pier.

On the basis of any of the above-mentioned embodiments, anchor steel beams are arranged in the pier 7; shear studs, PBL shear keys and a plurality of stiffening plates are arranged on the anchor steel beams, and the shear studs and shear keys It is to strengthen the connection between the steel beam and the concrete to ensure the consolidation effect, and the stiffening plate is to meet the stress requirements of the anchored steel beam.

On the basis of any of the above embodiments, the diaphragm 4 is a solid-web diaphragm. Setting the diaphragm 4 as a solid-web type can meet the force requirements and at the same time meet the needs of pouring concrete.

On the basis of any of the above embodiments, the length of the box chamber 6 buried in the bridge pier 7 is greater than the length between the bridge pier 7 and the steel box girder 3 .

Specifically, as shown in Figure 3, the box chamber 6 protrudes from the bottom of the beam by 5.8m, 4m of which is embedded in the bridge pier 7, and 1.8m is located between the bridge pier 7 and the steel box girder 3; The length between the pier 7 and the steel box girder 3 makes the consolidation effect good.

The structural system of the multi-tower cable-stayed bridge jointly built by highway and railway provided by the embodiment of the utility model adopts a rigid frame continuous system, which expands the constraint system of the multi-tower cable-stayed bridge jointly built by highway and railway, and satisfies the premise of structural rigidity and stress In this way, the scale of the bridge tower and the foundation can be reduced, and the construction cost can be saved.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present utility model, and are not intended to limit it; although the utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: It is still possible to modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit of the technical solutions of the various embodiments of the present invention. and range.

Claims (6)

1. a kind of structure system of road-rail joint construction multi-tower cable-stayed bridge, is characterized in that, comprises a plurality of steel structure bridge towers, and described multiple steel structure bridge towers comprise middle tower (1) and side tower (2); The middle tower (1) is consolidated with tower beam piers; The side towers (2) are consolidated with tower beams and separated from tower piers, and double-row supports are arranged on the top of the piers. 2. The structural system according to claim 1, characterized in that, said middle tower (1) adopting tower beam pier consolidation further comprises: The middle tower (1) and the steel box girder (3) are consolidated with a tower beam; The steel box girder (3) corresponding to the middle tower (1) is internally provided with a diaphragm (4), and the two diaphragms (4) corresponding to the same tower limb (5) are longitudinally connected to the tower limb ( The front and rear wall plates of 5) correspond to each other, and the side wall plates of the tower limb (5) correspond to the web plates of the steel box girder (3); A box chamber (6) is formed between the two transverse diaphragms (4) corresponding to the same tower limb (5) and the two webs of the steel box girder (3), and the box chamber (6) extends out from the bottom of the beam for a certain period of time. distance and embed in the pier (7). 3. The structural system according to claim 1, characterized in that, the side towers (2) are consolidated with tower beams and separated from tower piers, and the top of the piers is provided with double rows of supports further comprising: The side tower (2) and the steel box girder (3) are consolidated with a tower beam; The steel box girder (3) corresponding to the side tower (2) is provided with a plurality of diagonal braces (8), and the two steel beam side boxes (9) of the steel box girder (3) are respectively provided with supports (10); The upper end of the support (10) is connected to the lower end of the steel beam side box (9), and the lower end of the support (10) is connected to the upper end of the pier (7). 4. The structural system according to claim 2, characterized in that concrete is poured into the part of the box chamber (6) between the bridge pier (7) and the steel box girder (3). 5. The structural system according to claim 2, characterized in that, anchoring steel beams are arranged in the pier (7); The anchor steel beam is provided with shear studs, PBL shear keys and multiple stiffening plates. 6. The structural system according to claim 2, characterized in that, the diaphragm (4) is a solid-web diaphragm.