CN215104595U - Road bridge transition device - Google Patents
Road bridge transition device Download PDFInfo
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- CN215104595U CN215104595U CN202023350982.7U CN202023350982U CN215104595U CN 215104595 U CN215104595 U CN 215104595U CN 202023350982 U CN202023350982 U CN 202023350982U CN 215104595 U CN215104595 U CN 215104595U
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- butt strap
- transition device
- bridge
- main beam
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Abstract
The utility model discloses a road and bridge transition device, which comprises a butt strap; the butt strap is in an inverted step shape, the upper step side of the butt strap is connected with the road surface plate, and the lower step side of the butt strap is connected with the main beam; and expansion joints are arranged between the butt straps and the road slab. The utility model provides a stairstepping attachment strap has realized the steady transition of two different rigidity of rigid bridge to flexible road bed, and the vehicle can smoothly pass through the road bridge changeover portion, has solved the problem of bridgehead bump car betterly, has improved the driving travelling comfort, can wide application in road bridge building field.
Description
Technical Field
The utility model relates to a road bridge building technical field, concretely relates to road bridge transition device.
Background
In recent years, road and bridge construction in China is rapidly developed, however, in the practical use process, the phenomenon of vehicle jumping at the bridge head of the road and bridge transition section frequently occurs for the following reasons: pile foundations are adopted on the bridge sides of the bridge abutment, so that the bridge settlement is small; and the abutment roadbed side is often a higher soft soil filling roadbed, and because the roadbed construction speed is high, and the filling soil behind the abutment is not easy to compact, the settlement after construction is larger. The phenomenon of bridge head jumping is caused by severe rigidity change from a rigid bridge to a flexible roadbed and cracking and slab staggering of a butt strap caused by large settlement difference of two sides of a bridge abutment. In addition, the unevenness of the expansion joint of the abutment, the rainwater infiltration at the expansion joint and the like aggravate the phenomenon of vehicle jump at the bridge head.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is, to the above-mentioned defect that prior art exists, provide a road bridge transition device, it can realize the smooth transition of two different rigidity of rigid bridge to flexible road bed, and the vehicle can smoothly pass through the road bridge changeover portion, solves the problem of bridgehead car jump betterly, improves the driving travelling comfort, can wide application in road bridge building field.
The utility model discloses a solve the technical scheme that above-mentioned technical problem adopted and be:
a road bridge transition device comprises a butt strap; the butt strap is in an inverted step shape, the upper step side of the butt strap is connected with the road surface plate, and the lower step side of the butt strap is connected with the main beam; and expansion joints are arranged between the butt straps and the road slab.
According to the technical scheme, the road slab is made of common concrete.
According to the technical scheme, a packing layer used for supporting the butt strap and the road slab is arranged below the connecting end of the butt strap, the road slab and the butt strap; the material used by the filler layer is light foam concrete; the light foam concrete is filler of a transitional filling road section of a soft soil foundation road bridge, the density is low (the minimum is 450kg/m3), and the settlement of a roadbed after construction is low. The length range of the packing layer is related to the filling height and soil mechanics parameters of the soft soil foundation, and the length range of the packing layer is determined through settlement calculation.
According to the technical scheme, the light foam concrete filler layer below the expansion joint is provided with a water drainage hole; the arrangement mode of the water drainage holes is quincunx.
According to the technical scheme, an impermeable film is arranged between the expansion joint and the water drainage hole; the contact surface of prevention of seepage membrane and outlet is provided with the through-hole, and the through-hole is in time discharged the ponding on the prevention of seepage membrane to the outlet, prevention of seepage membrane 8 is the geomembrane.
According to the technical scheme, the material of the butt strap is high-ductility polymer (EGC). The high-ductility polymer (EGC) is prepared from cement, silica fume, blast furnace slag, sand, stone, PE fibers and a high-efficiency water reducing agent, has the ultimate tensile strength of 3.8MPa in 28 days, the ultimate tensile strain of 6.8 percent and the initial crack strength of 1.9MPa, has large ultimate tensile strain and good ductility, has the tensile strain strengthening characteristic, and has better impermeability and durability compared with common reinforced concrete.
According to the technical scheme, a bridge abutment used for supporting the main beam and the butt strap is arranged below the main beam.
According to the technical scheme, the bridge further comprises a movable support, and the upper portion of the first end of the bridge abutment is connected with the lower portion of the main beam through the movable support.
According to the technical scheme, a felt is attached to the upper portion of the second end of the bridge abutment; the butt strap is arranged above the felt.
According to the technical scheme, paving layers are arranged above the main beam and the butt strap; the upper surface of the pavement layer is flush with the upper surface of the road slab.
According to the technical scheme, the butt strap steel bars are arranged on the butt strap and inserted into the main beam to connect the butt strap with the main beam; an expansion joint dowel bar is arranged in the expansion joint, one end of the expansion joint dowel bar is inserted into the butt strap, the other end of the expansion joint dowel bar is inserted into the road slab, and the butt strap is connected with the road slab.
The utility model discloses following beneficial effect has:
1. the utility model provides a stairstepping attachment strap has realized the steady transition of two different rigidity of rigid bridge to flexible road bed, and the vehicle can smoothly pass through the road bridge changeover portion, has solved the problem of bridgehead bump car betterly, has improved the driving travelling comfort, can wide application in road bridge building field.
2. The utility model provides a changeover portion weak soil roadbed fill highway section adopts light-duty foam concrete filler, has reduced abutment left and right sides, the expansion joint both sides roadbed settlement difference of attachment strap department, avoids the attachment strap to produce fracture or wrong platform.
3. The utility model discloses in lead to the good high ductility polymer of ductility (EGC) attachment strap of bridge deformation, no longer set up traditional bridge expansion joint.
Drawings
Fig. 1 is a schematic structural diagram of a road-bridge transition device in an embodiment of the present invention;
in the figure, a butt strap-1, a bridge abutment-2, a main beam-3, a filler layer-4, a road deck-5, a movable support-6, a water drainage hole-7, an impermeable membrane-8, a pavement layer-9, an expansion joint dowel bar-10, an expansion joint-11, butt strap steel bars-12 and an oil felt-13.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and examples.
Referring to fig. 1, the present invention provides an embodiment of a road-bridge transition device, which includes a butt strap 1; the butt strap 1 is in an inverted step shape, the upper step side of the butt strap 1 is connected with a road surface plate 5, and the lower step side of the butt strap 1 is connected with a main beam 3; an expansion joint 11 is arranged between the access board 1 and the road surface board 5.
Further, the material of the road slab 5 is common concrete.
Further, a packing layer 4 for supporting the access boards 1 and the access boards 5 is arranged below the connecting ends of the access boards 1, the access boards 5 and the access boards 1; the filler layer 4 is made of light foam concrete. The length range of the light foam concrete filler layer 4 is related to the filling height and soil mechanics parameters of a soft soil foundation, and the length range of the filler layer 4 is determined through settlement calculation.
Furthermore, the packing layer 4 below the expansion joint 11 is provided with a water drainage hole 7; the arrangement mode of the water drainage holes 7 is quincunx.
Further, an impermeable film 8 is arranged between the expansion joint 11 and the water drainage hole 7; the contact surface of prevention of seepage membrane 8 and outlet 7 is provided with the through-hole, and the through-hole in time drains the ponding on the prevention of seepage membrane 8 to outlet 7, prevention of seepage membrane 8 is the geomembrane.
Further, the material of the butt strap 1 is high ductility polymer (EGC). The high-ductility polymer (EGC) is prepared from cement, silica fume, blast furnace slag, sand, stone, PE fibers and a high-efficiency water reducing agent, has the ultimate tensile strength of 3.8MPa in 28 days, the ultimate tensile strain of 6.8 percent and the initial crack strength of 1.9MPa, has large ultimate tensile strain and good ductility, has the tensile strain strengthening characteristic, and has better impermeability and durability compared with common reinforced concrete.
Further, a bridge abutment 2 for supporting the main beam 3 and the butt strap 1 is arranged below the main beam 3.
Further, the movable support 6 is further included, and the upper portion of the first end of the abutment 2 is connected with the lower portion of the main beam 3 through the movable support 6.
Further, a felt 13 is attached to the second end of the bridge abutment 2; the butt strap 1 is arranged above the felt 13.
Furthermore, paving layers 9 are arranged above the main beam 3 and the butt strap 1; the upper surface of the paving layer 9 is flush with the upper surface of the road slab 5.
Furthermore, the access board 1 is provided with access board reinforcing steel bars 12, and the access board reinforcing steel bars 12 are inserted into the main beam 3 to connect the access board 1 with the main beam 3; an expansion joint dowel bar 10 is arranged in the expansion joint 11, one end of the expansion joint dowel bar 10 is inserted into the butt strap 1, the other end of the expansion joint dowel bar is inserted into the road slab 5, and the butt strap 1 is connected with the road slab 5.
The above is only a preferred embodiment of the present invention, and the scope of the right of the present invention should not be limited by this, so that the equivalent changes made in the claims of the present invention still belong to the protection scope of the present invention.
Claims (10)
1. A road and bridge transition device is characterized by comprising a butt strap; the butt strap is in an inverted step shape, the upper step side of the butt strap is connected with the road surface plate, and the lower step side of the butt strap is connected with the main beam; and expansion joints are arranged between the butt straps and the road slab.
2. The road-bridge transition device of claim 1, wherein a packing layer for supporting the access boards and the access boards is arranged below the connecting ends of the access boards and the access boards; the filler layer is made of light foam concrete.
3. The road and bridge transition device of claim 2, wherein the packing layer below the expansion joint is provided with a drain hole; the arrangement mode of the water drainage holes is quincunx.
4. The road and bridge transition device of claim 3, wherein an impermeable film is arranged between the expansion joint and the drainage hole; the contact surface of prevention of seepage membrane and outlet is provided with the through-hole, and the through-hole is in time discharged the ponding on the prevention of seepage membrane to the outlet, the prevention of seepage membrane is the geomembrane.
5. The road-bridge transition device of claim 1, wherein the material of the butt strap is high-ductility polymer.
6. The road-bridge transition device of claim 1, wherein a bridge abutment for supporting a main beam and a butt strap is provided below the main beam.
7. The road-bridge transition device of claim 6, further comprising a movable support, wherein the main beam is supported by the movable support at the upper part of the first end of the abutment.
8. The road and bridge transition device of claim 6, wherein a felt is attached above the second end of the abutment; the butt strap is arranged above the felt.
9. The road and bridge transition device of claim 1, wherein a paving layer is arranged above the main beam and the butt strap; the upper surface of the pavement layer is flush with the upper surface of the road slab.
10. The road and bridge transition device of claim 1, wherein the butt strap is provided with butt strap steel bars, and the butt strap steel bars are inserted into the main beam to connect the butt strap with the main beam; an expansion joint dowel bar is arranged in the expansion joint, one end of the expansion joint dowel bar is inserted into the butt strap, the other end of the expansion joint dowel bar is inserted into the road slab, and the butt strap is connected with the road slab.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023350982.7U CN215104595U (en) | 2020-12-31 | 2020-12-31 | Road bridge transition device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023350982.7U CN215104595U (en) | 2020-12-31 | 2020-12-31 | Road bridge transition device |
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| Publication Number | Publication Date |
|---|---|
| CN215104595U true CN215104595U (en) | 2021-12-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023350982.7U Active CN215104595U (en) | 2020-12-31 | 2020-12-31 | Road bridge transition device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114351567A (en) * | 2021-12-31 | 2022-04-15 | 安徽省交通规划设计研究总院股份有限公司 | Novel road and bridge connection structure and construction method |
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2020
- 2020-12-31 CN CN202023350982.7U patent/CN215104595U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114351567A (en) * | 2021-12-31 | 2022-04-15 | 安徽省交通规划设计研究总院股份有限公司 | Novel road and bridge connection structure and construction method |
| CN114351567B (en) * | 2021-12-31 | 2024-04-26 | 安徽省交通规划设计研究总院股份有限公司 | Road bridge connection structure and construction method |
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