CN216515078U

CN216515078U - Overflow bridge

Info

Publication number: CN216515078U
Application number: CN202121501004.XU
Authority: CN
Inventors: 彭高著; 蒋士基; 陆迎寿
Original assignee: Guangxi Zhuang Autonomous Region Water Resources And Electric Power Survey Design And Research Institute Co ltd
Current assignee: Guangxi Zhuang Autonomous Region Water Resources And Electric Power Survey Design And Research Institute Co ltd
Priority date: 2021-01-15
Filing date: 2021-07-02
Publication date: 2022-05-13
Anticipated expiration: 2031-07-02

Abstract

The utility model discloses a water overflowing bridge, wherein a bridge body is formed by rigidly connecting a plurality of box girders, each box girder comprises a bottom plate, webs positioned on two sides above the bottom plate and a bridge deck positioned on the top, and bottom plate exhaust holes and web plate exhaust holes used for reducing buoyancy of the bridge during water overflowing are respectively formed in the bottom plate and the webs. The utility model has reasonable and ingenious structural design, is stable and reliable, and can ensure that reservoir water freely enters and exits the box girder cavity by opening holes at the bottom and two sides of the conventional small prestressed box girder, and increase the stop block and the anchor bolt at the support, thereby enhancing the stability of the flood overflowing bridge in the reservoir area and realizing the purpose of allowing the bridge to overflow when the reservoir area water level of the reservoir rises due to the fact that the flood control reservoir capacity is started in the reservoir storage and flood area.

Description

Overflow bridge

Technical Field

The utility model relates to a flooding bridge, in particular to a box girder flooding bridge.

Background

The rural reconstruction road in the temporary storage area of the reservoir is widely provided with medium and small bridges needing to cross small rivers and branch ditches in the reservoir area, because the medium and small bridges are influenced by the flood jacking of large rivers in the reservoir, the water level under the corresponding bridge design flood standard is generally higher (the medium bridge needs to meet the flood standard in 50 years, and the small bridge needs to meet the flood standard in 25 years), if the medium and small bridges are designed according to the corresponding flood standard, the bridge deck elevation is far higher than that of roads and houses on two sides to form a rainbow bridge, so that the manufacturing cost is increased, the driving is inconvenient, and the medium and small bridges obviously deviate from the economic and reasonable principle for rural low-grade roads. Therefore, generally, the height of the bridge deck needs to be reduced to be as wide as roads on two sides, and when the water level of a reservoir area rises due to temporary flood interception and storage when the reservoir meets with a water reservoir to cope with downstream flood control, namely when the temporary storage and flood detention area is temporarily used (the flood frequency of a general occurrence area is more than 20 years), the bridge is allowed to flood, and corresponding engineering measures need to be adopted to ensure the safety of the bridge in flooding. Considering that the flow velocity in the branch flow or branch ditch of the reservoir area is very small when in flood, in order to ensure that the bridge can safely flood, a continuous rigid frame can be generally adopted to rigidly connect the upper structure and the lower structure of the bridge, so as to prevent the upper structure of the bridge from being unstable due to the influence of the buoyancy force, and for the bridge on the rural road, the investment is relatively large, the construction is relatively complex, and the process requirement is relatively high.

The existing medium and small bridge models are mature, and the common bridge section models with medium and small spans are as follows: hollow slab beams, small box beams and the like, but the bridge is not allowed to flood in use. When the bridge is subjected to corresponding flood, the bridge is allowed to flood, and corresponding engineering measures are required to be taken for ensuring the safety of the bridge flooding. Considering that the flow velocity in the branch flow or branch ditch of the reservoir area is very small when in flood, in order to ensure that the bridge can safely flood, a continuous rigid frame can be generally adopted to rigidly connect the upper structure and the lower structure of the bridge, so as to prevent the upper structure of the bridge from being unstable due to the influence of the buoyancy force, and for the bridge on the rural road, the investment is relatively large, the construction is relatively complex, and the process requirement is relatively high.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems, the utility model discloses a flooding bridge.

The technical scheme adopted by the utility model for realizing the purpose is as follows:

the utility model provides a flood bridge, its pontic is formed by a plurality of case roof beams rigid connection, the case roof beam includes the bottom plate, is located the web of bottom plate top both sides and is located the decking at top, in bottom plate, web are last to be offered respectively and are used for reducing bottom plate exhaust hole, web exhaust hole of buoyancy when the bridge flood.

The bottom plate is provided with six bottom plate exhaust holes which are arranged in the middle of the bottom plate at intervals, so that flowing water can enter the box girder from the middle of the bottom of the bridge when flowing over the bridge, and the impact of the flowing water on the bridge is reduced.

The diameter of the bottom plate exhaust hole is 100 mm.

Be equipped with 8 web exhaust holes on the web, the web exhaust hole is arranged according to spacing distance and is set up in the upper end of this web, and the upper end and the decking of this web are connected, and the web exhaust hole sets up in the upper end of web to gaseous gathering in the box girder can be reduced when the bridge is overflowed to flowing water, the harmful effects of buoyancy to the bridge is reduced.

The diameter of the web plate vent hole is 50 mm.

And the bridge deck is provided with a deck vent hole.

The bridge body is fixed on the support, and the bridge body is connected with the support through an anchor bolt.

And the support is also provided with stop blocks which are positioned at two sides of the bridge body.

The utility model has the beneficial effects that: the utility model has reasonable and ingenious structural design, is stable and reliable, and can ensure that reservoir water freely enters and exits the box girder cavity by opening holes at the bottom and two sides of the conventional small prestressed box girder, and increase the stop block and the anchor bolt at the support, thereby enhancing the stability of the flood overflowing bridge in the reservoir area and realizing the purpose of allowing the bridge to overflow when the reservoir area water level of the reservoir rises due to the fact that the flood control reservoir capacity is started in the reservoir storage and flood area.

The utility model is further described with reference to the following detailed description and accompanying drawings.

Drawings

FIG. 1 is a side view of a box girder according to the present invention;

fig. 2 is a front view of the box girder of the present invention.

Detailed Description

In the embodiment, referring to fig. 1 and fig. 2, a bridge body of the overtopping bridge provided by the embodiment is formed by rigidly connecting a plurality of box girders, each box girder comprises a bottom plate 1, web plates 2 located on two sides above the bottom plate 1 and a bridge deck 3 located at the top, and bottom plate exhaust holes 4 and web plate exhaust holes 5 used for reducing buoyancy of the bridge during overtopping are respectively formed in the bottom plate 1 and the web plates 2.

Six bottom plate exhaust holes 4 are formed in the bottom plate 1, the bottom plate exhaust holes 4 are arranged in the middle of the bottom plate 1 at intervals, so that flowing water can enter the box girder from the middle of the bottom of the bridge when flowing over the bridge, and impact of flowing water on the bridge is reduced.

The diameter of the bottom plate vent hole 4 is 100 mm.

Be equipped with 8 web exhaust holes 5 on the web 2, web exhaust holes 5 arrange according to spacing distance and set up in the upper end of this web 2, and the upper end and the decking 3 of this web 2 are connected, and web exhaust holes 5 set up in the upper end of web 2 to gaseous gathering in the case roof beam can be reduced when the bridge is overflowed to flowing water, the harmful effects of buoyancy to the bridge is reduced.

The diameter of the web vent hole 5 is 50 mm.

And a panel exhaust hole is formed in the bridge panel 3.

The bridge body is fixed on the support, and the bridge body is connected with the support through anchor bolts.

The utility model has reasonable and ingenious structural design, is stable and reliable, and can ensure that reservoir water freely enters and exits the box girder cavity by opening holes at the bottom and two sides of the conventional small prestressed box girder, and increase the stop block and the anchor bolt at the support, thereby enhancing the stability of the flood overflowing bridge in the reservoir area and realizing the purpose of allowing the bridge to overflow when the reservoir area water level of the reservoir rises due to the fact that the flood control reservoir capacity is started in the reservoir storage and flood area.

The foregoing is merely a preferred embodiment of the utility model and is not intended to limit the utility model in any manner. Those skilled in the art can make many possible variations and modifications to the utility model using the above disclosed technical means and teachings, or can modify equivalent embodiments with equivalent variations, without departing from the scope of the utility model. Therefore, all equivalent changes made according to the shape, structure and principle of the present invention without departing from the technical scheme of the present invention shall be covered by the protection scope of the present invention.

Claims

1. The utility model provides a flood bridge, its pontic is formed by a plurality of case roof beam rigid connection, the case roof beam includes the bottom plate, is located the web of bottom plate top both sides and is located the decking at top, its characterized in that: and the bottom plate and the web plate are respectively provided with a bottom plate exhaust hole and a web plate exhaust hole which are used for reducing the buoyancy force of the bridge in the process of overflowing water.

2. The flooding bridge of claim 1 wherein said base plate is provided with six base plate exhaust vents.

3. The flooding bridge of claim 2 wherein said floor vents have a diameter of 100 mm.

4. The flooding bridge of claim 1 wherein said web is provided with 8 web vents.

5. The flooding bridge of claim 4 wherein said web vent holes are 50mm in diameter.

6. The flooding bridge of claim 1 wherein said deck is provided with deck vents.

7. The flooding bridge of claim 1 further comprising a support, said pontic being secured to said support, said pontic being connected to said support by an anchor.

8. The flooding bridge of claim 7 further comprising stops on said support, said stops being located on either side of said bridge body.