CN215164529U - Bridge structure - Google Patents
Bridge structure Download PDFInfo
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- CN215164529U CN215164529U CN202022850033.9U CN202022850033U CN215164529U CN 215164529 U CN215164529 U CN 215164529U CN 202022850033 U CN202022850033 U CN 202022850033U CN 215164529 U CN215164529 U CN 215164529U
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- decking
- cantilever arm
- deck
- box girder
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Abstract
The embodiment of the application provides a bridge structures, including case roof beam, cantilever arm and decking. The cantilever arm is connected with the side part of the box girder, and an open slot is formed at the upper part of one end of the cantilever arm, which is far away from the box girder. The decking sets up on the upper portion of case roof beam and cantilever arm, and the bottom that the decking kept away from case roof beam one side is formed with the escape canal, open slot and escape canal looks adaptation in order to dodge the escape canal. The drainage ditch is communicated with the top of the bridge deck plate so that rainwater on the bridge deck plate flows into the drainage ditch. The application provides a bridge structures forms the escape canal through the bottom that sets up the decking to need not set up the trompil on choosing the arm, improved the structural strength who chooses the arm effectively, avoid the stress concentration and the fatigue damage who chooses the arm.
Description
Technical Field
The application relates to the technical field of bridge construction, in particular to a bridge structure.
Background
In the prior art, in order to increase the width of a bridge structure, cantilever structures are usually disposed on two sides of a box girder. The drainage system of the bridge deck is one of key measures for guaranteeing bridge laying and bridge structure durability, and for a bridge structure with a cantilever arm, the current commonly used drainage structure is in a form that water is collected towards two sides of the bridge deck, and vertical drainage holes are formed in two sides of the bridge deck according to a certain distance. The cantilever arm is provided with a hole for penetrating through the water collecting pipe, the water drain pipe is connected with the water collecting pipe through a vertical water drain pipe, and the water collecting pipe is connected to an underground water system at a pier.
In the prior art, the behavior of opening a hole in the middle of the cantilever arm seriously affects the section characteristic of the cantilever arm, reduces the spanning capability of the cantilever arm, easily causes stress concentration and fatigue damage at the hole and seriously affects the safety performance of a bridge structure.
SUMMERY OF THE UTILITY MODEL
In view of this, the embodiment of the present application is expected to provide a bridge structure, so as to solve the problem that the opening at the middle of the cantilever arm in the prior art affects the safety performance of the bridge structure.
In order to achieve the above object, an embodiment of the present application provides a bridge structure, including:
a box girder;
the cantilever arm is connected with the side part of the box girder, and an open slot is formed in the upper part of one end, far away from the box girder, of the cantilever arm; and
the decking sets up the case roof beam with the upper portion of choosing the arm, the decking is kept away from the bottom of case roof beam one side is formed with the escape canal, the open slot with escape canal looks adaptation is in order to dodge the escape canal, the escape canal with the top intercommunication of decking, so that rainwater on the decking flows into in the escape canal.
Further, the bridge deck is arranged to be inclined downward from the middle to the side of the bridge deck.
Furthermore, the inclination of the bridge deck is K, and K is more than or equal to 1% and less than or equal to 2%.
Furthermore, a plurality of drain holes are formed above the drainage ditch, the drain holes are arranged at intervals, and rainwater on the bridge deck flows into the drainage ditch through the drain holes.
Furthermore, the box girder also comprises a water filtering grate which is arranged at the water drainage hole.
Further, the box girder comprises a bottom plate, a diaphragm plate and a longitudinal web plate which are connected with each other to form a plurality of box structures with upper openings, and the bridge deck plate covers are arranged on the plurality of box structures.
Further, the distance between the diaphragm plates is d1，3m≤d1Less than or equal to 4 m; and/or the presence of a gas in the gas,
the bottom plate comprises a transverse bottom plate and an inclined bottom plate which are smoothly connected, the included angle between the transverse bottom plate and the inclined bottom plate is alpha, and alpha is more than or equal to 15 degrees and less than or equal to 30 degrees.
Further, the bridge deck comprises a bridge deck body and a plurality of stiffening ribs, the drainage ditch and the stiffening ribs are prefabricated at the bottom of the bridge deck body at intervals, and the drainage ditch is positioned on two sides of the stiffening ribs;
the diaphragm plate is provided with a first reinforcing groove, the cantilever arm is provided with a second reinforcing groove, and the first reinforcing groove and the second reinforcing groove are respectively matched with the stiffening ribs.
Further, the distance between the stiffening ribs is d2，0.4m≤d2≤0.6m。
Further, the cantilever comprises a cantilever beam body and a flange plate, the flange plate is arranged at the lower part of the cantilever beam body, the opening groove is formed in the cantilever beam, and the cantilever beam body is aligned with the diaphragm plate.
Furthermore, the transverse length of the cantilever arm is L, and L is more than or equal to 4m and less than or equal to 8 m; and/or the presence of a gas in the gas,
the bridge structure also comprises railings which are respectively arranged on two sides of the bridge deck; and/or the presence of a gas in the gas,
the cross section of the drainage ditch is semicircular.
The bridge structures that this application embodiment provided keeps away from the bottom of box girder one side and forms the escape canal on the decking to need not to add drainage device such as the drain pipe that hangs, can extensively be applicable to the bridge of strideing across the railway. The upper portion of the end, far away from the box girder, of the cantilever arm is provided with an open slot avoiding a drainage ditch, and a hole for a water supply and drainage pipe to penetrate through is not needed to be formed in the middle of the cantilever arm, so that the risk of stress concentration and fatigue damage on the cantilever arm is effectively reduced, and the safety performance of a bridge structure is improved.
Drawings
FIG. 1 is a cross-sectional view of one side of a center section of a bridge construction according to an embodiment of the present application;
FIG. 2 is an enlarged view of a portion of FIG. 1 at A;
fig. 3 is a schematic structural diagram of a portion of a bridge structure according to an embodiment of the present application.
Description of reference numerals:
1. a box girder; 11. a base plate; 111. a transverse bottom plate; 112. a sloping floor; 12. a diaphragm plate; 121. a first reinforcement groove; 13. a longitudinal web; 2. picking an arm; 21. a cantilever beam body; 211. an open slot; 212. a second reinforcement groove; 22. a flange plate; 3. a bridge deck; 31. a bridge deck panel body; 311. a drainage ditch; 312. a water drain hole; 32. A stiffening rib; 4. draining the water grate; 5. a railing.
Detailed Description
It should be noted that, in the present application, technical features in examples and embodiments may be combined with each other without conflict, and the detailed description in the specific embodiment should be understood as an explanation of the gist of the present application and should not be construed as an improper limitation to the present application.
The directional terms in the description of the present application are used for convenience in describing the present application and for simplicity in description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present application. The terms "top," "bottom," "lateral," "longitudinal," and the like, as used herein, refer to an orientation and are described with reference to the orientation as shown in FIG. 1.
In the prior art, the middle part of the cantilever is provided with a hole in order to arrange a drainage ditch, so that the section characteristic of the cantilever can be influenced, and stress concentration and fatigue damage at the hole of the cantilever are easily caused. In addition, for the bridge spanning railways and stations, the drainage ditch is hung in the middle of the cantilever arm, so that certain potential safety hazards are caused for the operation of railways and stations below the bridge.
In view of the above, an embodiment of the present invention provides a bridge structure, please refer to fig. 1 to 3, which includes a box girder 1, an arm 2 and a bridge deck 3. The cantilever arm 2 is connected with the side part of the box girder 1, and the upper part of one end of the cantilever arm 2 far away from the box girder 1 is provided with an open slot 211. The bridge deck 3 is arranged on the upper portions of the box girder 1 and the cantilever arm 2, a drainage ditch 311 is formed at the bottom of one side, away from the box girder 1, of the bridge deck 3, and the open groove 211 is matched with the drainage ditch 311 to avoid the drainage ditch 311. The drain 311 communicates with the top of the bridge deck 3 so that rainwater on the bridge deck 3 flows into the drain 311. Specifically, the cantilever arms 2 are arranged on two sides of the box girder 1, so that the box girder has the advantages of excellent stress performance and convenience in construction, and the width of a bridge structure can be increased. The open slot 211 of the cantilever arm 2 should be able to accommodate the drain 311, so that the drain 311 formed on the bridge deck 3 can be placed in the open slot 211, and the matching between the bridge deck 3 and the cantilever arm 2 is more consistent.
When rainwater exists on the bridge deck 3, the drainage ditch 311 is communicated with the top of the bridge deck 3, so that the rainwater on the bridge deck 3 can directly flow into the drainage ditch 311 without opening a hole on the cantilever arm 2, and the structural strength of the cantilever arm 2 is effectively improved. In addition, in order to form the drainage ditch 311 on the bridge deck 3, the bottom of the bridge deck 3 needs to be additionally provided with a corresponding structure to enclose the drainage ditch 311, and the drainage ditch 311 can effectively improve the bending strength of the bridge deck 3, thereby improving the overall strength of the bridge structure. Meanwhile, rainwater on the bridge deck 3 directly flows into the drainage ditch 311, so that a drain pipe, a vertical drainage pipe and a water collecting pipe are not needed, the overall structure of the bridge structure is simplified, the weight of the bridge structure is reduced, the construction cost is saved, and the maintenance is more convenient.
It can be understood that the drainage ditch 311 may be integrally formed in the process of processing the bridge deck 3, or may be formed by welding in the subsequent construction process, specifically, the drainage ditch is selected according to the convenience degree in the actual construction. When the drainage ditch 311 is integrally formed in the process of processing the bridge deck 3, the overall construction convenience of the bridge structure can be improved. The deck slab 3 may be made of steel, concrete or a mixture of steel and concrete. The bridge structure that this application embodiment provided forms escape canal 311 through the bottom of keeping away from box girder one side on decking 3 to need not add drainage devices such as the drain pipe that hangs. And the upper part of the end of the cantilever arm 2 far away from the box girder 1 is provided with an open slot 211 avoiding the drainage ditch 311, so that the middle part of the cantilever arm 2 is not required to be provided with an opening through which a water supply and drainage pipe penetrates, the risk of stress concentration and fatigue damage on the cantilever arm 2 is effectively reduced, and the safety performance of the bridge structure is improved.
Preferably, in order to enhance the connection strength between the drainage ditch 311 and the cantilever arm 2, after the bridge deck 3 is installed in the opening groove 211, the drainage ditch 311 and the cantilever arm 2 may be welded, so as to improve the stress condition of the cantilever arm 2 and further enhance the overall strength of the bridge structure.
The bridge structures that this application embodiment provided forms escape canal 311 through the bottom of keeping away from box girder 1 one side on decking 3 to need not to add drainage device such as the drain pipe that hangs, can extensively be applicable to the bridge of strideing across the railway. The upper part of one end of the cantilever arm 2 far away from the box girder 1 is provided with an open slot 211 avoiding the drainage ditch 311, and the middle part of the cantilever arm 2 is not required to be provided with a hole for the water supply and drainage pipe to penetrate, so that the risk of stress concentration and fatigue damage on the cantilever arm 2 is effectively reduced, and the safety performance of the bridge structure is improved.
It is understood that the cross-sectional shape of the gutter 311 may be various, such as rectangular, trapezoidal, etc.
In a preferred embodiment, referring to fig. 1 and 2, the bridge structure provided by the present application, wherein the drainage ditch 311 has a semicircular cross-sectional shape. According to the water passing capability checking calculation, the water passing capability of the semicircular drainage ditch 311 is stronger, and the drainage capability is obviously higher than that of the drainage ditch 311 with other shapes and sections.
Further, in an embodiment, referring to fig. 1, the present application provides a bridge structure in which the deck slab 3 is inclined downward from the middle to the side of the deck slab 3. Thereby the rainwater on the decking 3 always flows to the escape canal 311 direction of both sides, prevents to appear ponding on the decking 3, has improved the drainage efficiency of decking 3 effectively, is favorable to keeping the clean, clean and tidy of decking 3.
In a preferred embodiment, the inclination of the bridge deck 3 is K, 1% K2%. The scope of the gradient K of setting up decking 3 prevents that decking 3's gradient from too high or low excessively to when improving decking 3's drainage efficiency, prevent that decking 3 from influencing the normal driving of vehicle on the bridge floor because of the inclination is too big.
In an embodiment, referring to fig. 2, in the bridge structure provided by the present application, a plurality of drainage holes 312 are formed above the drainage ditch 311, the drainage holes 312 are arranged at intervals, and the rainwater on the bridge deck 3 flows into the drainage ditch 311 through the drainage holes 312. Through setting up outlet 312 to satisfy the discharge demand of rainwater on the decking 3, and set up outlet 312 through the interval, can prevent to influence the structural strength of decking 3 because of outlet 312 is too much.
Further, in an embodiment, referring to fig. 2, in the bridge structure provided by the present application, the box girder 1 further includes a water filtering grate 4 disposed at the water discharge hole 312. The water filtering grate 4 can prevent the garbage on the bridge deck 3 from entering the drainage ditch 311 and causing certain blockage to the drainage system of the bridge.
In an embodiment, referring to fig. 3, the present application provides a bridge structure, in which a box girder 1 includes a bottom plate 11, a diaphragm plate 12 and a longitudinal web 13 connected to each other to form a plurality of box structures with an upper opening, and a bridge deck 3 is covered on the plurality of box structures. By providing the bottom plate 11, the horizontal partition plate 12, and the vertical web 13 to form a box structure, the bending strength of the box girder 1 can be effectively improved.
In an embodiment, referring to fig. 1, the present application provides a bridge structure, in which a bridge deck 3 includes a bridge deck body 31 and a plurality of stiffeners 32. The drainage ditch 311 and the plurality of stiffening ribs 32 are prefabricated at the bottom of the bridge deck body 31 at intervals, the drainage ditch 311 is positioned at two sides of the plurality of stiffening ribs 32, and the stiffening ribs 32 are arranged to improve the structural strength of the bridge deck 3. In order to ensure that the bridge deck 3 is well attached to the box girder 1 after the stiffening ribs 32 are arranged, the diaphragm 12 is provided with a first reinforcing groove 121, the cantilever arm 2 is provided with a second reinforcing groove 212, and the first reinforcing groove 121 and the second reinforcing groove 212 are respectively matched with the stiffening ribs 32.
It will be understood that the stiffening ribs 32 formed on the same deck 3 may be of the same or different shape, and accordingly, the shape of the first stiffening grooves 121 and the second stiffening grooves 212 need only be adapted to the shape of the corresponding stiffening ribs 32 to accommodate the stiffening ribs 32. Preferably, the outer surfaces of the corresponding stiffening ribs 32 of the first reinforcing groove 121 and the second reinforcing groove 212 are completely attached, so that the overall performance of the bridge structure after the two reinforcing grooves are matched is improved while the stiffening ribs 32 are accommodated.
Preferably, after the bridge deck 3 is covered on the box girder 1 and the outrigger 2, the first reinforcement groove 121 and the second reinforcement groove 212 are respectively matched with the stiffening ribs 32, and in order to improve the connection strength of the bridge deck 3 with the box girder 1 and the outrigger 2, the matching part of the first reinforcement groove 121 and the stiffening ribs 32 and the matching part of the second reinforcement groove 212 and the stiffening ribs 32 are welded.
It can be understood that, according to the stress requirement, the bottom plate 11, the diaphragm plate 12, the longitudinal web 13, the bridge deck plate 31, the stiffening ribs 32 and the cantilever arm 2 are made of steel plates with different thicknesses, such as 14mm, 16mm, 18mm, 20mm or 24mm, at different sections along the extending direction of the bridge, so as to meet the strength requirement of the bridge structure and simultaneously reduce the overall weight of the bridge structure. It should be noted that, depending on the stress of different structures, even in the same section, different thicknesses may be provided for the bottom plate 11, the diaphragm plate 12, the longitudinal web 13, the bridge deck body 31, the stiffening ribs 32, and the cantilever arm 2, so as to keep the service life of each structure in the bridge structure as uniform as possible.
Further, in an embodiment, referring to fig. 2, the present application provides a bridge structure in which the distance between the stiffeners 32 is d2Taking into account the reinforcing effect of the stiffening ribs 32 on the deck 3 and its effect on the weight of the deck 3, d2Can float within a certain range, for example, 0.4m ≦ d2Less than or equal to 0.6 m. Preferably, d2May be 0.4m, 0.5m, 0.6m, etc.
In one embodiment, the present application provides a bridge structure in which the distance between the diaphragms 12 is d1，3m≤d1Less than or equal to 4 m. E.g. d1May be 3m, 3.5m, 4m, etc. It will be appreciated that the distance d between the diaphragms 12 is set1Is 4m, the structural strength of the box girder 1 can be effectively secured, and d is set1Is 3m, preventing the diaphragm 12 from being too dense and increasing the overall weight of the bridge structure.
In one embodiment, referring to fig. 1 and 3, the present application provides a bridge structure, wherein the bottom plate 11 comprises a smoothly connected horizontal bottom plate 111 and an inclined bottom plate 112, an included angle between the horizontal bottom plate 111 and the inclined bottom plate 112 is α, and α is greater than or equal to 15 ° and less than or equal to 30 °. For example, α is 15 °, 20 °, 25 °, or 30 °, etc. It is understood that the horizontal bottom plate 111 and the inclined bottom plate 112 may be formed by bending after being integrally formed, or may be formed by cutting and then connected together by welding or the like. It can be understood that the horizontal bottom plate 111 is horizontally arranged, and the inclined bottom plate 112 is obliquely arranged relative to the horizontal bottom plate 111, so that the cross section of the whole bottom plate 11 is streamline, and the whole bottom plate has better wind resistance. It should be noted that, for different bridge structures, the optimal values corresponding to α are different, and need to be obtained through testing by means such as experiments.
In an embodiment, referring to fig. 1, in the bridge structure provided by the present application, the cantilever 2 includes a cantilever beam body 21 and a flange plate 22, the flange plate 22 is disposed at a lower portion of the cantilever beam body 21, and the opening groove 211 is formed on the cantilever beam body 21. The flange plate 22 is arranged at the bottom of the cantilever beam body 21, so that the local stability of the cantilever 2 can be effectively enhanced, and the strength of the bridge structure is further improved. In addition, the cantilever beam body 21 is aligned with the diaphragm plate 12 to improve the overall strength of the bridge structure.
In an embodiment, in the bridge structure provided by the application, the transverse length of the cantilever arm 2 is L, L is greater than or equal to 4m and less than or equal to 8m, for example, L may be 4m, 5m, 6m, 7m or 8m, and the transverse width of the bridge structure is increased while the structural stability is ensured.
In an embodiment, referring to fig. 1 and 2, the bridge structure provided by the present application further includes railings 5 respectively disposed on two sides of the bridge deck 3. It will be appreciated that the balustrade 5 should be disposed outside the gutter 311 so as to have a function of laterally retaining water to allow rainwater on the bridge deck 3 to flow into the gutter 311. In addition, the railing 5 also has the function of blocking, and when an accident happens, the vehicle falls down to the bridge.
The various embodiments/implementations provided herein may be combined with each other without contradiction.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (11)
1. A bridge construction, comprising:
a box girder;
the cantilever arm is connected with the side part of the box girder, and an open slot is formed in the upper part of one end, far away from the box girder, of the cantilever arm; and
the decking sets up the case roof beam with the upper portion of choosing the arm, the decking is kept away from the bottom of case roof beam one side is formed with the escape canal, the open slot with escape canal looks adaptation is in order to dodge the escape canal, the escape canal with the top intercommunication of decking, so that rainwater on the decking flows into in the escape canal.
2. The bridge construction of claim 1, wherein the deck slab is disposed downwardly from the middle to the side of the deck slab.
3. The bridge construction according to claim 2, wherein the inclination of the deck slab is K, K being 1% to 2%.
4. The bridge structure according to claim 1, wherein a plurality of drainage holes are formed above the drainage ditch, the drainage holes are arranged at intervals, and rainwater on the bridge deck flows into the drainage ditch through the drainage holes.
5. The bridge structure of claim 4, wherein the box girder further comprises a water filtration grate disposed at the drainage opening.
6. The bridge construction of claim 1, wherein the box girder comprises a bottom plate, a diaphragm plate and a longitudinal web plate connected to each other to form a plurality of box structures having an upper opening, and the bridge deck plate is covered on the plurality of box structures.
7. A bridge construction according to claim 6, wherein the distance between the diaphragms is d1，3m≤d1Less than or equal to 4 m; and/or the presence of a gas in the gas,
the bottom plate comprises a transverse bottom plate and an inclined bottom plate which are smoothly connected, the included angle between the transverse bottom plate and the inclined bottom plate is alpha, and alpha is more than or equal to 15 degrees and less than or equal to 30 degrees.
8. The bridge structure according to claim 6, wherein the bridge deck comprises a bridge deck body and a plurality of stiffening ribs, the drainage ditch and the plurality of stiffening ribs are prefabricated at the bottom of the bridge deck body at intervals, and the drainage ditch is positioned at two sides of the plurality of stiffening ribs;
the diaphragm plate is provided with a first reinforcing groove, the cantilever arm is provided with a second reinforcing groove, and the first reinforcing groove and the second reinforcing groove are respectively matched with the stiffening ribs.
9. The bridge construction of claim 8, wherein the stiffeners have a spacing d2，0.4m≤d2≤0.6m。
10. The bridge structure according to claim 6, wherein the outrigger includes an outrigger body and a flange plate, the flange plate being provided at a lower portion of the outrigger body, the open slot being formed on the outrigger beam, the outrigger body being provided in alignment with the diaphragm plate.
11. The bridge structure of claim 1, wherein the cantilever arm has a transverse length L, L is greater than or equal to 4m and less than or equal to 8 m; and/or the presence of a gas in the gas,
the bridge structure also comprises railings which are respectively arranged on two sides of the bridge deck; and/or the presence of a gas in the gas,
the cross section of the drainage ditch is semicircular.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022850033.9U CN215164529U (en) | 2020-12-01 | 2020-12-01 | Bridge structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022850033.9U CN215164529U (en) | 2020-12-01 | 2020-12-01 | Bridge structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112376384A (en) * | 2020-12-01 | 2021-02-19 | 中铁第四勘察设计院集团有限公司 | Bridge structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112376384A (en) * | 2020-12-01 | 2021-02-19 | 中铁第四勘察设计院集团有限公司 | Bridge structure |
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