CN211312165U - Overhanging type hollow bridge abutment - Google Patents
Overhanging type hollow bridge abutment Download PDFInfo
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- CN211312165U CN211312165U CN201921733955.2U CN201921733955U CN211312165U CN 211312165 U CN211312165 U CN 211312165U CN 201921733955 U CN201921733955 U CN 201921733955U CN 211312165 U CN211312165 U CN 211312165U
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Abstract
The utility model discloses an overhanging type hollow bridge abutment, which is arranged at a main beam grounding section, and the main beam is of an overhanging structure; the abutment is of a box-shaped structure and comprises a top plate, a bottom plate and a web plate; the top plate extends towards two sides along the transverse bridge to be outwards cantilevered to form wing plates, and extends towards the main beam to form a bridge abutment cantilever section; the extending length of the abutment overhanging section spans the revetment structure; the end surfaces of the overhanging sections of the bridge abutment are respectively provided with limit stops corresponding to the lower parts of the two sides of the main beam, and the distance between the two limit stops and the transverse direction of the main beam is reserved to be not more than 50 mm; a shockproof rubber block is arranged between the inward side of each limit stop transverse bridge and the side surface of the corresponding main beam; a bearing is arranged at a transition section between the abutment overhanging section and the abutment box structure; each web plate of the abutment is provided with a plurality of vent holes along the bridge direction. The utility model provides a girder ground connection's that encorbelments functional problem can enough guarantee the wholeness of girder and ground abutment, can continue the outward appearance structure of girder again, and the view effect is better.
Description
Technical Field
The utility model relates to a bridge construction technical field, in particular to hollow abutment of formula of encorbelmenting.
Background
The existing bridge abutment is mostly arranged at two ends of a full bridge, the front end supports a bridge span, the rear end is connected with a roadbed, and the bridge abutment plays a role in supporting and blocking the abutment, filling soil in the roadbed and connecting the bridge span with the roadbed. The main function of this type of abutment is to bear the load from the superstructure and to self-retransmit it and itself to the foundation, and also to bear the additional lateral pressure generated by the vehicle load on the back of the abutment filling and the filling.
However, when the girder is designed as an overhanging structure, the conventional abutment structure is difficult to meet the function of connecting the bridge with the on-shore roadbed; in addition, when the current bank protection structure exists on the river bank, the abutment pile foundation collides with the base position of the bank protection structure, and the construction condition is not met.
Accordingly, there is a need for improvements in existing abutment structures that overcome the deficiencies of the prior art.
SUMMERY OF THE UTILITY MODEL
In view of the above-mentioned defect of prior art, the utility model provides a hollow abutment of formula of encorbelmenting, the purpose of realization is the functional problem of solving the girder ground connection of encorbelmenting, can enough guarantee the wholeness of girder and ground abutment, can continue the outward appearance structure of girder again, and the view effect is better.
In order to achieve the purpose, the utility model discloses a hollow abutment of formula of encorbelmenting, the abutment sets up in girder earthing section, just the girder is the structure of encorbelmenting.
The bridge abutment is of a box-shaped structure with a cavity, and the box-shaped structure comprises a top plate, a bottom plate and a plurality of webs arranged between the top plate and the bottom plate;
the top plate extends towards two sides along the transverse bridge to be outwards cantilevered to form wing plates, and the top plate extends towards the direction of the main beam to form a bridge abutment cantilever section;
the extending length of the abutment overhanging section spans the revetment structure;
the end surface of the bridge abutment overhanging section is connected with the cantilever end surface of the main beam, and an expansion joint is arranged between the end surface of the bridge abutment overhanging section and the cantilever end surface of the main beam;
the end surfaces of the overhanging sections of the bridge abutment are respectively provided with limit stops corresponding to the lower parts of the two sides of the main beam, and the distance between the two limit stops and the main beam in the transverse bridge direction is reserved to be not more than 50 mm;
a shockproof rubber block is arranged between the inward side of each limit stop transverse bridge and the corresponding side surface of the main beam;
a bearing is arranged at a transition section between the abutment overhanging section and the abutment box-shaped structure;
each web of the abutment is provided with a plurality of vent holes along the bridge direction.
Preferably, the abutment and the horizontal beam are placed on the foundation, and a butt strap is arranged between the abutment and the horizontal beam;
a bracket is arranged at one end of the abutment connected with the butt strap, one end of the butt strap is connected with the abutment through the bracket, and a settlement joint is arranged between the abutment and the butt strap;
the cross section of the butt strap is shaped like Jiong, vertical plates extending vertically downwards are arranged on two sides of the butt strap, and soil is filled on the inner side below the butt strap in the shape like Jiong.
Preferably, the slope aspect ratio of the bearing is 2/3.
Preferably, the anti-vibration rubber block is anchored to the inner side of the transverse bridge of the limit stop by using stainless steel bars.
Preferably, the top plate, the bottom plate and the web all have a thickness of between 200mm and 300 mm.
Preferably, the distance between the vent holes along the bridge direction is not more than 2m, and each vent hole is higher than the ground line by more than 0.4 m and is higher than the designed water level of the bridge.
Preferably, each of the ventilation holes in the outermost web is provided with a 5% transverse slope laterally outwards.
Preferably, a concrete cushion is arranged below the abutment.
More preferably, the concrete pad is 100mmC15 concrete.
Preferably, the top plate extends towards both sides along the transverse bridge and is provided with a drip groove on the bottom edge surface of the wing plate formed by overhanging.
The utility model has the advantages that:
the utility model discloses an abutment of encorbelmenting compares the vertical power that does not bear the girder and transmit with traditional abutment, and the structure atress is little.
The utility model discloses the abutment section of encorbelmenting of well abutment can be adjusted according to the demand, can be suitable for the multiple condition. Can adjust the span that the structure of encorbelmenting is suitable for through the section structure roof beam height of encorbelmenting and the arrangement of reinforcement condition, and then be applicable to multiple ground condition, the structure section of encorbelmenting moreover can keep unanimous with the girder structure, realizes the wholeness and the aesthetic property of bridge.
The utility model discloses an abutment section of encorbelmenting is equipped with the bearing, can improve the structure of encorbelmenting and stride across the ability, increases the bearing and makes the structure root roof beam height of encorbelmenting increase, and the ability of moment of flexure is born to the very big improvement structure, and then enlarges the leap across ability of cantilever section, and the atress performance of the size control section of encorbelmenting of accessible adjustment bearing has certain degree of freedom moreover.
The limit stop block of the cantilever bridge abutment can provide limit guarantee for the transverse displacement of the main beam under natural vibration, man-induced vibration and earthquake, can limit the transverse movement and rotation of the main beam, effectively prevent the irreversible damage of the lower structure caused by external force, and improve the service life of the structure; meanwhile, the safety sense of pedestrians during passing is increased; in addition, limit stop cost of maintenance is low, and does not influence the normal use of main bridge.
The utility model discloses well hollow abutment can the material performance of make full use of concrete and reinforcing bar to save material, the abutment design is hollow thin-walled structure moreover, can alleviate the abutment dead weight, reduces the requirement to the ground bearing capacity.
The utility model discloses under the relatively poor condition of geological conditions, the abutment platform of encorbelmenting can arrange bearing board and pile foundation, and under the better condition of geological conditions, can adopt to enlarge the basis and carry out the ground and handle.
The utility model discloses well transversal access board of personally submitting "Jiong" font has not only realized the smooth-going connection at abutment and horizon, guarantees the current ability of structure, and the riser of both sides can also play the effect of retaining soil, has promoted overall structure's view effect.
The utility model discloses the air vent is all established to the web of well abutment can adjust the indoor outer difference in temperature of case, prevents that the case roof beam from leading to inside and outside difference in temperature too big because the hydration heat reaction of concrete or outside temperature sudden change, produces the non-atress crack, and the side web air vent sets up to horizontal outside 5% cross slope in addition, can guarantee to flow into the indoor rainwater of case and discharge smoothly.
The conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings, so as to fully understand the objects, the features and the effects of the present invention.
Drawings
Fig. 1 is a schematic top view of an embodiment of the present invention.
Fig. 2 shows a schematic side view of an embodiment of the present invention.
Fig. 3 is a schematic cross-sectional view at AA of fig. 1 according to the present invention.
Fig. 4 is a schematic cross-sectional view at BB in fig. 1 according to the present invention.
Fig. 5 shows a schematic view of a partial cross-sectional structure of a middle vent part of the present invention.
Detailed Description
Examples
As shown in fig. 1 to 5, the overhanging hollow bridge abutment, the bridge abutment 3 is arranged at the grounding section of the main beam 1, and the main beam 1 is of an overhanging structure;
the bridge abutment 3 is of a box-shaped structure with a cavity, and the box-shaped structure comprises a top plate, a bottom plate and a plurality of web plates arranged between the top plate and the bottom plate;
the top plate extends towards two sides along the transverse bridge to be outwards cantilevered to form wing plates, and the top plate extends towards the direction of the main beam 1 to form a bridge abutment cantilever section 31;
the extended length of the abutment overhanging section 31 spans the revetment structure 5;
the end surface of the bridge abutment overhanging section 31 is connected with the cantilever end surface of the main beam 1, and an expansion joint 33 is arranged between the end surface of the bridge abutment overhanging section 31 and the cantilever end surface of the main beam 1;
the end surfaces of the abutment overhanging sections 31 are respectively provided with limit stops 35 corresponding to the lower parts of the two sides of the main beam 1, and the distance between the two limit stops 35 and the main beam 1 in the transverse bridge direction is reserved to be not more than 50 mm;
a shockproof rubber block 36 is arranged between the inner side of each limit stop 35 transverse bridge and the corresponding side surface of the main beam 1;
a bearing 32 is arranged at a transition section between the abutment overhanging section 31 and the box-shaped structure of the abutment 3;
each web of the abutment 3 is provided with a plurality of vent holes 37 along the bridge direction.
The utility model discloses a principle lies in, the roof forms the abutment section of encorbelmenting 31 towards the extension of main 1 direction of boxlike structure roof beam of girder's one end, adopts the abutment of encorbelmenting and connects the bridge construction in the same direction, and is discontinuous in the structure, consequently only bears the dead load such as the dead weight of choosing the arm section and upper portion crowd, and the atress is less, and comparatively frivolous that can design practices thrift concrete and reinforcing bar quantity, and then reduces engineering cost.
The two limit stoppers 35 and the shockproof rubber blocks 36 arranged at the lower parts of the two sides of the main beam 1 can limit the transverse movement and rotation of the main beam, effectively prevent the irreversible damage to the lower part structure caused by external force, and prolong the service life of the structure.
In some embodiments, the abutment 3 and the horizontal beam 2 are placed on the foundation, and the butt strap 4 is arranged between the abutment 3 and the horizontal beam 2
A bracket 39 is arranged at one end of the abutment 3 connected with the butt strap 4, one end of the butt strap 4 is connected with the abutment 3 through the bracket 39, and a butt strap settlement joint 34 is arranged between the abutment 3 and the butt strap 4;
the cross section of the access board 4 is shaped like Jiong, both sides are provided with a vertical board extending vertically downwards, and earth is filled at the inner side below the access board 4 shaped like Jiong.
In some embodiments, the slope aspect ratio of the support 32 is 2/3.
In some embodiments, the anti-rattle rubber 36 is anchored to the laterally inboard side of the positive stop 35 with stainless steel reinforcement.
In certain embodiments, the top plate, bottom plate, and web each have a thickness between 200mm and 300 mm.
In some embodiments, every two vent holes 37 are spaced apart by no less than 2 meters, and each vent hole 37 is at least 0.4 meters above the ground line 6 and above the height of the designed water level of the bridge.
In certain embodiments, each vent hole 37 on the outermost web is provided with a 5% lateral outward slope.
In some embodiments, a concrete pad 7 is provided below the abutment 3.
In some embodiments, the concrete pad 7 is 100mmC15 concrete.
In some embodiments, the top plate is provided with a drip groove 38 along the bottom edge surface of the overhanging wing plate extending towards both sides of the cross bridge.
The foregoing has described in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can 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 logic 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 defined by the claims.
Claims (10)
1. The bridge abutment (3) is arranged at the grounding section of the main beam (1), and the main beam (1) is of an overhanging structure; the method is characterized in that:
the bridge abutment (3) is of a box-shaped structure provided with a cavity, and the box-shaped structure comprises a top plate, a bottom plate and a plurality of webs arranged between the top plate and the bottom plate;
the top plate extends towards two sides along the transverse bridge to be outwards cantilevered to form wing plates, and the top plate extends towards the main beam (1) to form a bridge abutment cantilever section (31);
the extended length of the abutment overhanging section (31) spans the revetment structure (5);
the end face of the abutment overhanging section (31) is connected with the cantilever end face of the main beam (1), and an expansion joint (33) is arranged between the end face of the abutment overhanging section (31) and the cantilever end face of the main beam (1);
the end surface of the bridge abutment overhanging section (31) is respectively provided with limit stops (35) corresponding to the lower parts of the two sides of the main beam (1), and the distance between the two limit stops (35) and the main beam (1) in the transverse bridge direction is reserved to be not more than 50 mm;
a shockproof rubber block (36) is arranged between the inner side of each limit stop (35) transverse bridge and the corresponding side surface of the main beam (1);
a bearing (32) is arranged at a transition section between the abutment overhanging section (31) and the box-shaped structure of the abutment (3);
each web plate of the abutment (3) is provided with a plurality of vent holes (37) along the bridge direction.
2. The overhanging hollow abutment according to claim 1, wherein the abutment (3) and the horizontal beam (2) are placed on a foundation, and a butt strap (4) is arranged between the abutment (3) and the horizontal beam (2);
a bracket (39) is arranged at one end, connected with the butt strap (4), of the abutment (3), one end of the butt strap (4) is connected with the abutment (3) through the bracket (39), and a butt strap settlement joint (34) is arranged between the abutment (3) and the butt strap (4);
the cross section of the butt strap (4) is Jiong-shaped, two sides of the butt strap are respectively provided with a vertical plate which vertically extends downwards, Jiong-shaped earth is filled at the inner side below the butt strap (4).
3. The overhanging hollow abutment of claim 1 wherein the bearing (32) has a slope aspect ratio of 2/3.
4. The overhanging hollow abutment of claim 1, wherein the anti-seismic rubber block (36) is anchored to the transverse bridge inboard side of the limit stop (35) with stainless steel reinforcement.
5. The overhanging hollow abutment of claim 1 wherein the top plate, bottom plate and web each have a thickness between 200mm and 300 mm.
6. The overhanging hollow abutment of claim 1, wherein the distance between the vent holes (37) is not more than 2m along the bridge direction, and each vent hole (37) is higher than the ground line (6) by more than 0.4 m and higher than the designed water level of the bridge.
7. The overhanging hollow abutment of claim 1 wherein each of the vent holes (37) in the outermost web is provided with a 5% lateral outward slope.
8. An overhanging hollow abutment according to claim 1 characterized in that a concrete cushion (7) is provided under the abutment (3).
9. The overhanging hollow abutment of claim 8, wherein the concrete pad (7) is 100mmC15 concrete.
10. The overhanging hollow abutment of claim 1 wherein the top plate has drip grooves (38) along the bottom edge surfaces of the cantilevered flanges extending laterally along the bridge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921733955.2U CN211312165U (en) | 2019-10-16 | 2019-10-16 | Overhanging type hollow bridge abutment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921733955.2U CN211312165U (en) | 2019-10-16 | 2019-10-16 | Overhanging type hollow bridge abutment |
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| Publication Number | Publication Date |
|---|---|
| CN211312165U true CN211312165U (en) | 2020-08-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921733955.2U Active CN211312165U (en) | 2019-10-16 | 2019-10-16 | Overhanging type hollow bridge abutment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112853943A (en) * | 2021-01-18 | 2021-05-28 | 浙江工业大学 | Pile-supported type empty box abutment in soft soil area |
| CN114687273A (en) * | 2022-02-25 | 2022-07-01 | 中铁十八局集团有限公司 | Bridge structure with U-shaped beam and construction method thereof |
-
2019
- 2019-10-16 CN CN201921733955.2U patent/CN211312165U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112853943A (en) * | 2021-01-18 | 2021-05-28 | 浙江工业大学 | Pile-supported type empty box abutment in soft soil area |
| CN114687273A (en) * | 2022-02-25 | 2022-07-01 | 中铁十八局集团有限公司 | Bridge structure with U-shaped beam and construction method thereof |
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