CN216765563U - Fishbone-shaped steel casing box for connecting abutment butt strap - Google Patents
Fishbone-shaped steel casing box for connecting abutment butt strap Download PDFInfo
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- CN216765563U CN216765563U CN202121049184.2U CN202121049184U CN216765563U CN 216765563 U CN216765563 U CN 216765563U CN 202121049184 U CN202121049184 U CN 202121049184U CN 216765563 U CN216765563 U CN 216765563U
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Abstract
The utility model discloses a fishbone-shaped steel casing box for connecting abutment buttresses, which is arranged at one end of the abutment buttresses extending into a roadbed and is used for absorbing the expansion deformation of the abutment buttresses caused by temperature change; the steel sleeve box is of a box-shaped structure with an opening on one side; the side opening extends into one end of the roadbed towards the abutment butt strap and is matched with one end of the abutment butt strap extending into the roadbed; the steel sleeve box is internally provided with an elastomer comprising a fishbone-shaped steel structure and a buffer filler; the elastic body is used for absorbing the expansion deformation of the abutment butt strap caused by temperature change; the fishbone-shaped steel structure comprises a rigid flat plate and a plurality of elastic plates, wherein the rigid flat plate is arranged along the horizontal direction or the telescopic deformation direction of the abutment butt strap, and the elastic plates are symmetrically arranged on the upper surface and the lower surface of the rigid flat plate. The application of the utility model can solve the problem that the bridge abutment butt strap expands and contracts due to temperature change to form reflection cracks, and avoid the phenomena of vehicle jumping, road surface pits and the like.
Description
Technical Field
The utility model relates to the technical field of bridge construction, in particular to a fishbone-shaped steel sleeve box for connecting abutment butt straps.
Background
The joint of the abutment and the roadbed is always the key of road engineering construction, is not properly treated, can cause uneven settlement after the road is built, causes the phenomenon of 'jumping', influences the driving comfort and accelerates the damage of structures and the road surface. Therefore, in design, a butt strap is often arranged behind the bridge, and a semi-rigid base layer with a certain thickness is arranged below the butt strap for transition so as to weaken the phenomenon of 'vehicle jumping'. The method has relatively low manufacturing cost and simple construction method, but the problems of pit concavity, joint step, vehicle jumping of bridge expansion joints and the like are easily caused at the joint of the butt strap and the roadbed along with repeated application of traffic load.
With the development of semi-integral bridge technology, the existing abutment treatment is also developed into a telescopic butt strap structure, and the schematic diagram of a common structure is shown in fig. 1 and fig. 2 and consists of a road surface, a butt strap and a sleeper beam. As the load of the vehicle and the expansion and contraction of the strap occur, the lower end of the strap stretches back and forth, and thus reflection cracks are generated at the lower end of the strap and above the lower end of the strap, as shown in fig. 2.
Therefore, how to improve the quality of the pavement at the joint of the lower end of the abutment butt strap and the sleeper beam becomes a technical problem which needs to be solved urgently by the technical personnel in the field.
SUMMERY OF THE UTILITY MODEL
In view of the defects of the prior art, the utility model provides the fishbone-shaped steel sleeve box for the connection of the abutment butt strap, and aims to solve the problem that the abutment butt strap stretches and contracts due to temperature change to form reflection cracks and avoid the phenomena of vehicle jumping, road surface pits and the like.
In order to achieve the purpose, the utility model discloses a fishbone-shaped steel casing box for connecting abutment buttresses, which is arranged at one end of the abutment buttresses extending into a roadbed and is used for absorbing the expansion deformation of the abutment buttresses caused by temperature change;
the steel sleeve box is of a box-shaped structure with an opening on one side; the side opening extends into one end of the roadbed towards the abutment butt strap and is matched with one end of the abutment butt strap extending into the roadbed;
one end of the abutment butt strap extending into the roadbed extends into the steel sleeve box from the side opening of the steel sleeve box;
the steel sleeve box is internally provided with an elastomer comprising a fishbone-shaped steel structure and a buffer filler; the elastic body is used for absorbing the expansion deformation of the abutment butt strap caused by the temperature change;
the fishbone-shaped steel structure comprises a rigid flat plate and a plurality of elastic plates, wherein the rigid flat plate is arranged along the horizontal direction or the telescopic deformation direction of the abutment butt strap, and the elastic plates are symmetrically arranged on the upper surface and the lower surface of the rigid flat plate; on a projection plane formed by the length and the height of the corresponding abutment butt strap, each elastic plate and the rigid flat plate form the same included angle.
Preferably, the abutment butt strap is connected with the abutment through a support and is connected with the bridge floor through a deformation joint.
Preferably, each included angle opening with an angle smaller than 90 degrees between the elastic plate and the rigid flat plate faces the abutment butt strap.
Preferably, the buffer filler is fine sand, foamed rubber or elastic particles.
Preferably, the abutment butt strap extends into one end of the roadbed, and the steel sleeve box is arranged on the sleeper beam;
the steel sleeve box is fixed on the sleeper beam, and the lower end of the side wall is embedded into the upper surface of the sleeper beam; and the upper surface of the sleeper beam is used as a bottom plate of the steel pouring jacket.
More preferably, a bonding separation layer made of bonding is arranged between one end of the abutment butt strap extending into the roadbed and the upper surface of the sleeper beam.
Preferably, the end of the abutment strap extending into the subgrade extends into the steel jacket box by at least 100mm, i.e. there is an overlap section of at least 100mm between the steel jacket box and the end of the abutment strap extending into the subgrade.
Preferably, the fishbone-shaped steel structure is made of stainless steel materials.
Preferably, the outer sides of the three sides of the steel pouring jacket without the opening and the upper part of the top plate are filled with broken stones.
Preferably, C15 concrete, cement-cement water-stable macadam and a soil foundation are sequentially arranged below the sleeper beam from top to bottom;
an asphalt pavement surface layer, a water-stable base layer and a gravel cushion layer are sequentially arranged on the bridge abutment butt strap from top to bottom; c15 concrete, cement water-stable macadam and a gravel layer are sequentially arranged below the abutment butt strap from top to bottom;
and the part below the gravel layer, which is close to the sleeper beam, is a soil foundation, and the part close to the bridge platform is filled with medium and coarse sand.
The utility model has the beneficial effects that:
the application of the utility model can prevent the bridge abutment from forming reflection cracks due to the expansion and contraction of the bridge abutment butt strap caused by temperature change, and avoid the phenomena of vehicle jumping, road surface pits and the like.
The conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings to fully understand the objects, the features and the effects of the present invention.
Drawings
Fig. 1 shows a schematic structure of the prior art.
Fig. 2 shows a schematic enlarged view of a portion a of fig. 1 according to the present invention.
Fig. 3 shows a schematic structural diagram of an embodiment of the present invention.
Fig. 4 is a partially enlarged view showing the elastic body absorbing the deformation after the abutment strap is contracted according to an embodiment of the present invention.
Fig. 5 is a partially enlarged view showing the amount of deformation that has not been absorbed by the elastomer after contraction of the abutment strap in one embodiment of the present invention.
Detailed Description
Examples
As shown in fig. 3 to 5, the fishbone-shaped steel casing for the abutment strap connection is disposed at one end of the abutment strap 1 extending into the roadbed, and is used for absorbing the expansion deformation of the abutment strap 1 caused by the temperature change;
the steel sleeve box 2 is of a box-shaped structure with an opening on one side; the side opening is towards one end of the abutment butt strap 1 extending into the roadbed and is matched with one end of the abutment butt strap 1 extending into the roadbed;
one end of the abutment butt strap 1 extending into the roadbed extends into the steel sleeve box 2 from the side opening of the steel sleeve box 2;
an elastic body comprising a fishbone-shaped steel structure 6 and a buffer filler 7 is arranged in the steel sleeve box 2; the elastic body is used for absorbing the expansion deformation of the abutment butt strap 1 caused by the temperature change;
the fishbone-shaped steel structure 6 comprises a rigid flat plate and a plurality of elastic plates, wherein the rigid flat plate is arranged along the horizontal direction or the telescopic deformation direction of the abutment butt strap 1, and the elastic plates are symmetrically arranged on the upper surface and the lower surface of the rigid flat plate; on a projection plane formed by the length and the height of the corresponding abutment butt strap 1, each elastic plate and the rigid flat plate form the same included angle.
The principle of the utility model is as follows:
when the abutment butt strap 1 is subjected to the action of vehicle load or expansion with heat and contraction with cold caused by temperature change, the tendency of stretching and moving appears. When the length of the abutment attachment strap 1 is increased, the fishbone-shaped steel structure 6 can be compressed, deformation is absorbed by the steel sleeve box 2, and after the length of the abutment attachment strap 1 is shrunk, the road surface above the steel sleeve box 2 is supported, so that gaps caused by stretching of the abutment attachment strap 1 are prevented, and further pits and reflection cracks on the road surface are prevented.
And, because the fishbone-shaped steel structure 6 sets up in steel jacket case 2, so after fishbone-shaped steel structure 6 received abutment attachment strap 1's thrust, can take place to warp in the steel jacket case 2, rely on the buffering filler 7 of steel jacket case 2 intussuseption simultaneously can take place to cushion when the abutment attachment strap 1 takes place to stretch out and draw back, realize similar to the spring atress and produce deformation, the effect of external force after withdrawing the recovery initial condition.
In some embodiments, the abutment strap 1 is connected to the abutment 3 by means of a support and to the deck 4 by means of a deformation joint.
In some embodiments, the included angle opening between each elastic plate and the rigid flat plate, which is smaller than 90 degrees, faces the abutment strap 1. In order to facilitate the elastic body to absorb the thrust of the butt strap, the direction of the opening of the included angle is consistent with the direction of the telescopic sideline of the butt strap.
In certain embodiments, the cushion fill 7 is fine sand, foamed rubber, or elastomeric particles.
In some embodiments, the abutment strap 1 extends into one end of the subgrade, and the steel casing 2 is arranged on the sleeper beam 8;
the steel pouring jacket 2 is fixed on the sleeper beam 8, and the lower end of the side wall is embedded into the upper surface of the sleeper beam 8; the upper surface of the sleeper beam 8 serves as the floor of the steel jacket 2.
In practical application, the steel pouring jacket 2 is 600mm long and 1m high, and is embedded into the upper surface of the sleeper beam 8 by 400 mm.
In some embodiments, a bonded spacer layer 9 made of adhesive is provided between one end of the abutment strap 1 extending into the subgrade and the upper surface of the sleeper beam 8.
In some embodiments, the end of the abutment strap 1 extending into the subgrade extends at least 100mm into the steel casing 2, i.e. there is a minimum of 100mm overlap between the steel casing 2 and the end of the abutment strap 1 extending into the land.
In certain embodiments, the fishbone 6 is made of stainless steel.
Wherein the thickness of the rigid flat plate is 1 cm, and the thickness of each elastic plate is 0.5 cm.
In some embodiments, the outside of the three unopened sides of the steel jacket box 2, as well as above the roof, are filled with gravel 13.
In some embodiments, the C15 concrete 10, the cement water-stabilized macadam 11 and the soil foundation 12 are sequentially arranged below the sleeper beam 8 from top to bottom;
in practical application, the sleeper beam 8 is 600mm high and 1500mm long and is made of C20 concrete. And a bonding separation layer is arranged between the sleeper beam 8 and the abutment butt strap 1 and is made of bonding oil.
The C15 concrete 10 below the sleeper beam 8 has a height of 100mm and a length of 2000mm and is placed below the sleeper beam 8.
The cement stabilized macadam below the sleeper beam 8 is 200mm in height, 2000mm in length and 4% in cement content, and is placed between the soil foundation 12 and the concrete.
An asphalt pavement surface layer 14, a water stabilization base layer 15 and a gravel cushion layer 16 are sequentially arranged on the bridge abutment butt strap from top to bottom; c15 concrete 10, cement water-stable macadam 11 and a gravel layer 17 are sequentially arranged below the abutment butt strap from top to bottom;
the part of the lower surface of the gravel layer 17, which is close to the sleeper beam 8, is provided with a soil foundation 12, and the part of the lower surface of the gravel layer, which is close to the bridge deck, is provided with a medium coarse sand filling 18.
The foregoing detailed description of the preferred embodiments of the utility model has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions that can be obtained by a person skilled in the art through logical analysis, reasoning or limited experiments based on the prior art according to the concepts of the present invention should be within the scope of protection determined by the claims.
Claims (10)
1. The fishbone-shaped steel casing box for the connection of the abutment butt strap is characterized by being arranged at one end, extending into a roadbed, of the abutment butt strap (1) and used for absorbing the expansion deformation of the abutment butt strap (1) caused by the temperature change;
the steel sleeve box (2) is of a box-shaped structure with an opening on one side; the side opening extends into one end of the roadbed towards the abutment butt strap (1) and is matched with one end of the abutment butt strap (1) extending into the roadbed;
one end of the abutment butt strap (1) extending into the roadbed extends into the steel sleeve box (2) from an opening on the side surface of the steel sleeve box (2);
the steel jacket box (2) is internally provided with an elastomer comprising a fishbone-shaped steel structure (6) and a buffer filling material (7); the elastic body is used for absorbing the expansion deformation of the abutment butt strap (1) caused by the temperature change;
the fishbone-shaped steel structure (6) comprises a rigid flat plate and a plurality of elastic plates, wherein the rigid flat plate is arranged along the horizontal direction or the telescopic deformation direction of the abutment butt strap (1), and the elastic plates are symmetrically arranged on the upper surface and the lower surface of the rigid flat plate; on a projection plane formed by the length and the height of the corresponding abutment butt strap (1), each elastic plate and the rigid flat plate form the same included angle.
2. The steel sleeve for abutment strap joints according to claim 1, characterized in that the abutment strap (1) is connected to the abutment (3) by means of a support and to the deck (4) by means of a deformation joint.
3. The steel slip-on-box for abutment strap joints according to claim 1, characterized in that the included angle between each elastic plate and the rigid flat plate is less than 90 degrees open towards the abutment strap (1).
4. Fishbone steel casing for abutment strap connection according to claim 1, characterised in that the buffer filling (7) is fine sand, foamed rubber or elastic particles.
5. The fishbone steel casing for abutment strap connection according to claim 1, characterized in that the abutment strap (1) extends into one end of the subgrade and the steel casings (2) are arranged on the sleeper beams (8);
the steel sleeve box (2) is fixed on the sleeper beam (8), and the lower end of the side wall is embedded into the upper surface of the sleeper beam (8); the upper surface of the sleeper beam (8) is used as a bottom plate of the steel pouring jacket (2).
6. Fishbone steel casing for abutment strap connection according to claim 5, characterised in that between the end of the abutment strap (1) extending into the subgrade and the upper surface of the sleeper beam (8) is provided a bonding spacer layer (9) made of adhesive.
7. The fishbone steel casing for abutment butt strap connection of claim 5, wherein the C15 concrete (10), cement-water stable broken stones (11) and a soil foundation (12) are sequentially arranged below the sleeper beam (8) from top to bottom;
an asphalt pavement surface layer (14), a water stabilization base layer (15) and a gravel cushion layer (16) are sequentially arranged on the bridge abutment butt strap from top to bottom; c15 concrete (10), cement water-stable macadam (11) and a gravel layer (17) are sequentially arranged below the abutment butt strap from top to bottom;
and a part of the lower surface of the gravel layer (17), which is close to the sleeper beam (8), is a soil foundation (12), and a part of the lower surface of the gravel layer, which is close to the bridge deck, is filled with medium and coarse sand (18).
8. The fishbone steel casing for abutment strap connection according to claim 1, characterised in that the end of the abutment strap (1) extending into the subgrade extends at least 100mm into the steel casing (2), i.e. there is a minimum of 100mm overlap between the steel casing (2) and the end of the abutment strap (1) extending into the subgrade.
9. Fishbone steel casing for abutment strap connection according to claim 1, characterised in that the fishbone steel structure (6) is made of stainless steel.
10. Fishbone steel casing for abutment strap connection according to claim 1, characterised in that the steel casing (2) is filled with crushed stones (13) on the outside of the three sides not open and above the top plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121049184.2U CN216765563U (en) | 2021-05-17 | 2021-05-17 | Fishbone-shaped steel casing box for connecting abutment butt strap |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121049184.2U CN216765563U (en) | 2021-05-17 | 2021-05-17 | Fishbone-shaped steel casing box for connecting abutment butt strap |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216765563U true CN216765563U (en) | 2022-06-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121049184.2U Active CN216765563U (en) | 2021-05-17 | 2021-05-17 | Fishbone-shaped steel casing box for connecting abutment butt strap |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216765563U (en) |
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2021
- 2021-05-17 CN CN202121049184.2U patent/CN216765563U/en active Active
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