Variable cross-section multi-box chamber box girder structure

Abstract

The utility model discloses a variable cross section multi -box chamber box girder structure, including bridge body, first end part and second end part, from the first end plate along the direction of second end part's width size of bridge surface gradually reduces the setting, a plurality of box chamber structures are arranged between first end part and second end part, and at least partial box chamber structure is arranged along the center position symmetry of first end part and second end part, first abutment is arranged on first end part, and second abutment is arranged on second end part, the bridge body is supported with ground through first abutment and second abutment, the distance from first end part to second end part is less than the width of second end part, the structure of this scheme can not only guarantee the drainage of wide bridge body structure, but also can guarantee the stability of whole, can also reduce the construction difficulty of bridge body simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of box girder technology, and in particular to a variable cross-section multi-compartment box girder structure. Background Technology

[0002] Prestressed concrete cast-in-place bridges have been widely used in highways, railways, and urban roads in China, becoming one of the main bridge types. Since the 1950s, my country has been researching and applying prestressed concrete technology. With continuous technological development, prestressed concrete highway bridges have been widely used in my country, especially since the 1990s. With the rapid development of expressways and urbanization, prestressed concrete highway bridges have played a vital role in highway bridge construction. Currently, prestressed concrete highway bridges have a wide range of applications, not only becoming one of the main bridge types in expressway bridges, but also being widely used in urban viaducts, interchanges, and railway overpasses.

[0003] In the current technology, box girders are usually used for bridges with small transverse spans and high vertical heights. Therefore, box girders usually have only 2 or 3 box cells, and the high vertical height facilitates the construction of the box girder and box cells. At present, there is no existing technology for box girder structures with large transverse spans and low vertical heights, which brings difficulties to the construction of existing technologies. Utility Model Content

[0004] The purpose of this utility model is to provide a variable cross-section multi-cell box girder structure to address the above-mentioned shortcomings, thereby solving the problem that the lack of application technology for bridge box girders with large transverse spans and low vertical height in the existing technology brings difficulties to construction.

[0005] This utility model is achieved through the following solution:

[0006] A variable cross-section multi-cell box girder structure includes a bridge body, a first end, and a second end. The width of the bridge deck gradually decreases from the first end plate towards the second end. Multiple box structures are arranged through the first end and the second end, with at least some of the box structures symmetrically arranged around the center of the first end and the second end. A first abutment is provided on the first end, and a second abutment is provided on the second end. The bridge body is supported by the first abutment and the second abutment. The distance from the first end to the second end is less than the width of the second end.

[0007] Based on the above-mentioned variable cross-section multi-cell box girder structure, sidewalks are provided on both sides of the bridge body, parallel to the sides of the bridge body, and the sidewalks are raised. A centerline is provided at the center of the bridge body, and two-way carriageways are provided on both sides of the centerline.

[0008] Based on the above-mentioned variable cross-section multi-cell box girder structure, a drainage outlet is provided at the elevated part of the sidewalk, and the sidewalk as a whole is inclined toward the drainage outlet, while the single-sided carriageway is also inclined toward the drainage outlet that is close to it.

[0009] Based on the above-mentioned variable cross-section multi-cell box girder structure, the overall slope of the single-sided carriageway from the center line to the drainage outlet is 2%, and the overall slope of the sidewalk from the side to the drainage outlet is 1.5%.

[0010] Based on the above-mentioned variable cross-section multi-compartment box girder structure, ten compartments are arranged sequentially along the width direction of the cavity. The first to fifth compartments are respectively located at the bottom of the left carriageway, and the sixth to tenth compartments are respectively located at the bottom of the right carriageway. The first and tenth compartments are respectively located on the two carriageways away from the center line, while the fifth and sixth compartments are respectively symmetrically located on the two carriageways close to the center line.

[0011] Based on the above-mentioned variable cross-section multi-cell box girder structure, the horizontal height of the first to fifth and tenth to sixth cell boxes gradually increases, with the first and tenth cell boxes being the smallest.

[0012] Based on the above-mentioned variable cross-section multi-cell box girder structure, the width of the first end is 53m, the width of the second end is 36.5m, and the length of the bridge body is 29.5m.

[0013] Based on the above-mentioned variable cross-section multi-cell box girder structure, the bottom of the first abutment is provided with a first foundation top, and the bottom of the second abutment is provided with a second foundation top.

[0014] Based on the above-mentioned variable cross-section multi-cell box girder structure, the area of ​​the top of the first foundation is not less than the coverage area of ​​the bottom of the first abutment, and the area of ​​the top of the second foundation is not less than the coverage area of ​​the bottom of the second abutment.

[0015] Based on the above-mentioned variable cross-section multi-cell box girder structure, a height difference is provided between the top of the first foundation and the top of the second foundation.

[0016] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0017] 1. In this design, the bridge deck dimensions gradually decrease from the first end to the second end, resulting in a variable cross-section structure. Furthermore, the distance from the first end to the second end is less than the width of the second end, making the bridge length less than the width on both sides. This leads to a wider lateral span for the abutments. Existing technology lacks a suitable box girder structure for this purpose. This design employs multiple box girder structures within the box girder. This approach reduces material usage while maintaining the bridge's mechanical properties, and ensures overall structural stability and symmetry despite the wider width and drainage slope. Because the bridge structure is wider overall, and a 2% slope reduction is implemented during construction to prevent water accumulation in the center, a height difference of 60-70cm is created between the bridge's center and its sides. This design not only ensures drainage for the wide bridge structure but also guarantees overall stability and reduces construction difficulty. Attached Figure Description

[0018] Figure 1 This is a top view of the overall structure of this utility model;

[0019] Figure 2 This is a cross-sectional structural diagram of the entire utility model;

[0020] Figure 3 This is a schematic cross-sectional view of the first end portion of this utility model;

[0021] Figure 4 This is a schematic cross-sectional view of the second end of the present invention.

[0022] Attached drawings: 1. Bridge body; 2. First end; 3. Second end; 4. First abutment; 5. Second abutment; 6. Pedestrian walkway; 7. Roadway; 8. Drainage outlet; 9. First foundation top; 10. Second foundation top; 11. First compartment; 12. Second compartment; 13. Third compartment; 14. Fourth compartment; 15. Fifth compartment; 16. Sixth compartment; 17. Seventh compartment; 18. Eighth compartment; 19. Ninth compartment; 110. Tenth compartment. Detailed Implementation

[0023] All features disclosed in this specification, or all steps in all disclosed methods or processes, may be combined in any way, except for mutually exclusive features and / or steps.

[0024] Any feature disclosed in this specification (including any appended claims and abstract) may be replaced by other equivalent or similar features, unless specifically stated otherwise. That is, unless specifically stated otherwise, each feature is merely one example of a series of equivalent or similar features.

[0025] In the description of this utility model, it should be understood that the terms "upper", "lower", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0026] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature.

[0027] Example 1

[0028] like Figures 1-4 As shown, this utility model provides a technical solution:

[0029] A variable cross-section multi-cell box girder structure includes, but is not limited to, a bridge body 1, a first end 2, and a second end 3. The width of the bridge deck gradually decreases from the first end plate along the direction of the second end 3. Multiple box structures are arranged through the first end 2 and the second end 3, and at least some of the box structures are symmetrically arranged along the center position of the first end 2 and the second end 3. A first abutment 4 is provided on the first end 2, and a second abutment 5 is provided on the second end 3. The bridge body 1 is supported by the first abutment 4 and the second abutment 5. The distance from the first end 2 to the second end 3 is less than the width of the second end 3.

[0030] Based on the above structure, in this design, the bridge deck dimensions gradually decrease from the first end 2 to the second end 3 of bridge body 1, presenting a variable cross-section structure. Furthermore, the distance from the first end 2 to the second end 3 is less than the width of the second end 3, making the length of bridge body 1 less than its width on both sides. This results in a wider lateral span for the abutments. Existing technology lacks a corresponding box girder structure for application. This design employs multiple box girder structures within the box girder. This approach reduces material usage while ensuring the mechanical performance of bridge body 1, and also maintains overall structural stability and symmetry despite the larger width and drainage slope. Since bridge body 1 is generally wider in width, and a 2% slope reduction is implemented during construction to prevent water accumulation in the center, a height difference of 60-70cm is created between the center and the sides of the bridge. This design not only ensures drainage for the wide bridge body 1 structure but also guarantees overall stability and reduces the construction difficulty of bridge body 1.

[0031] As an example, sidewalks 6 are provided on both sides of the bridge body 1, parallel to the sides of the bridge body 1. The sidewalks 6 are raised. A center line is provided at the center of the bridge body 1, and two-way carriageways 7 are provided on both sides of the center line.

[0032] Based on the above structure, a sloping sidewalk 6 is set up to facilitate pedestrian traffic, and a two-way roadway 7 is set up to facilitate vehicle traffic. Raising the sidewalk 6 can prevent water flowing from the roadway 7 from flowing onto the sidewalk 6.

[0033] As an example, a drain outlet 8 is provided at the elevated position of the sidewalk 6, and the sidewalk 6 is inclined towards the drain outlet 8. The single-sided carriageway 7 is also inclined towards the drain outlet 8 that is close to it.

[0034] Based on the above structure, by tilting the sidewalk 6 and the roadway 7, any water flow can be quickly discharged outward through the drain outlet 8.

[0035] As an example, the slope of the single-sided carriageway 7 from the center line to the drain outlet 8 is 2%, and the slope of the sidewalk 6 from the side to the drain outlet 8 is 1.5%.

[0036] As an example, ten chambers are arranged sequentially along the width of the cavity. The first chamber 11, the second chamber 12, the third chamber 13, the fourth chamber 14, and the fifth chamber 15 are respectively located at the bottom of the left carriageway 7, and the sixth chamber 16, the seventh chamber 17, the eighth chamber 18, the ninth chamber 19, and the tenth chamber 110 are respectively located at the bottom of the right carriageway 7. The first chamber 11 and the tenth chamber 110 are respectively located on the two carriageways 7 away from the center line, and the fifth chamber 15 and the sixth chamber 16 are respectively symmetrically located on the two carriageways 7 close to the center line.

[0037] The horizontal height of the first compartment 11 to the fifth compartment 15, and from the tenth compartment 110 to the sixth compartment 16, gradually increases, with the first compartment 11 and the tenth compartment 110 being the smallest compartments.

[0038] Based on the above structure, this scheme sets the height position of the box chamber according to the shape and slope of bridge body 1, which can make the overall structure of bridge body 1 more stable and prevent bridge deck deformation.

[0039] As an example, the width of the first end 2 is 53m, the width of the second end 3 is 36.5m, and the length of the bridge body 1 is 29.5m.

[0040] As an example, a first foundation top 9 can be set at the bottom of the first abutment 4, and a second foundation top 10 can be set at the bottom of the second abutment 5. The first foundation top 9 and the second foundation top 10 support the first abutment 4 and the second abutment 5, which can prevent overall settlement.

[0041] As an example, the area of ​​the first foundation top 9 is not less than the coverage area of ​​the bottom of the first bridge abutment 4, and the area of ​​the second foundation top 10 is not less than the coverage area of ​​the bottom of the second bridge abutment 5.

[0042] There is a height difference between the first foundation top 9 and the second foundation top 10.

[0043] Based on the above structure, by setting a foundation with a large area, ground settlement can be avoided, thus demonstrating the overall structural strength.

[0044] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A variable cross-section multi-cell box girder structure, characterized in that: The bridge includes a bridge body, a first end, and a second end. The width of the bridge deck gradually decreases from the first end plate towards the second end. Multiple box structures are provided through the first end and the second end, and at least some of the box structures are symmetrically arranged around the center of the first end and the second end. A first abutment is provided on the first end, and a second abutment is provided on the second end. The bridge body is supported by the first abutment and the second abutment. The distance from the first end to the second end is less than the width of the second end.

2. The variable cross-section multi-cell box girder structure as described in claim 1, characterized in that: Sidewalks are provided on both sides of the bridge body, parallel to the sides of the bridge body. The sidewalks are raised. A center line is provided at the center of the bridge body, and two-way carriageways are provided on both sides of the center line.

3. The variable cross-section multi-cell box girder structure as described in claim 2, characterized in that: The elevated part of the sidewalk is equipped with a drainage outlet, and the entire sidewalk is inclined toward the drainage outlet. The single-sided carriageway is also inclined toward the drainage outlet that is close to it.

4. A variable cross-section multi-cell box girder structure as described in claim 3, characterized in that: The slope of the single-sided carriageway from the center line to the drain outlet is 2%, and the slope of the sidewalk from the side to the drain outlet is 1.5%.

5. A variable cross-section multi-cell box girder structure as described in claim 4, characterized in that: Ten compartments are arranged sequentially along the width of the cavity. The first to fifth compartments are located at the bottom of the left lane, and the sixth to tenth compartments are located at the bottom of the right lane. The first and tenth compartments are located on the two lanes away from the center line, while the fifth and sixth compartments are symmetrically located on the two lanes close to the center line.

6. The variable cross-section multi-cell box girder structure as described in claim 5, characterized in that: The horizontal height of the containers gradually increases from the first to the fifth container, and from the tenth to the sixth container, with the first and tenth containers being the smallest.

7. A variable cross-section multi-cell box girder structure as described in claim 6, characterized in that: The width of the first end is 53m, the width of the second end is 36.5m, and the length of the bridge body is 29.5m.

8. A variable cross-section multi-cell box girder structure as described in claim 7, characterized in that: The bottom of the first bridge abutment is provided with a first foundation top, and the bottom of the second bridge abutment is provided with a second foundation top.

9. A variable cross-section multi-cell box girder structure as described in claim 8, characterized in that: The area of ​​the top of the first foundation is not less than the coverage area of ​​the bottom of the first abutment, and the area of ​​the top of the second foundation is not less than the coverage area of ​​the bottom of the second abutment.

10. A variable cross-section multi-cell box girder structure as described in claim 9, characterized in that: There is a height difference between the top of the first foundation and the top of the second foundation.

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