CN207362673U - One kind is without bearing list limb Continuous Rigid-Frame Bridge with Thin-Wall Piers - Google Patents
One kind is without bearing list limb Continuous Rigid-Frame Bridge with Thin-Wall Piers Download PDFInfo
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- CN207362673U CN207362673U CN201721427409.7U CN201721427409U CN207362673U CN 207362673 U CN207362673 U CN 207362673U CN 201721427409 U CN201721427409 U CN 201721427409U CN 207362673 U CN207362673 U CN 207362673U
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- 239000011513 prestressed concrete Substances 0.000 claims description 6
- 239000011150 reinforced concrete Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 abstract description 4
- 239000011230 binding agent Substances 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 239000004567 concrete Substances 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000007596 consolidation process Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
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Abstract
The utility model provides one kind without bearing list limb Continuous Rigid-Frame Bridge with Thin-Wall Piers, including：Pier, first pair of limb abutment pier and second pair of limb abutment pier in girder, single limb；First pair of limb abutment pier and second pair of limb abutment pier include upper pier shaft and lower pier shaft, upper pier shaft and the rigid connection of lower pier shaft, upper pier shaft includes the first limb column and the second limb column, and the first limb column and the second limb column are affixed with girder, and binder between limb is provided among the first limb column and the second limb column；The height of first limb column of first pair of limb abutment pier is more than the height of the second limb column of first pair of limb abutment pier；Pier and girder are affixed in single limb.The middle pier of traditional scheme is changed to single limb Thin-Wall Piers by no bearing list limb Continuous Rigid-Frame Bridge with Thin-Wall Piers provided by the utility model by twin legged thin wall pier, so both added the overall thrust stiffness joined entirely, thoroughly solves the risk that earthquake territory falls beam, the thrust stiffness of pier do not increase again in, and in can saving pier material utilization amount, reduce cost.
Description
Technical Field
The utility model relates to a highway, railway bridge beam structure technical field, more specifically relates to a continuous rigid frame bridge of no support single limb thin wall mound.
Background
The continuous rigid frame bridge without support is a new bridge type developed in recent years, and compared with the traditional continuous beam (rigid frame) side pier provided with movable supports, the side pier adopts a pier-beam consolidation mode. In order to better adapt to the longitudinal telescopic deformation of the temperature load main beam, the side pier adopts a double-support thin-wall pier with smaller thrust rigidity, and the main beam is only fixedly connected with one thin-wall column. Through the research on related bridges at home and abroad, the continuous rigid frame without the support has the main characteristics that: (1) the support is not arranged, the support is prevented from being damaged, the cost is saved, the later maintenance cost is low, and the circuit shutdown caused by the support replacement is avoided; (2) the anti-seismic performance is good, the horizontal force can be uniformly distributed on each pier during earthquake, and the continuous girder bridge needs to be provided with braking piers or special anti-seismic supports; (3) the pier beams are directly connected in a fixed mode, lines are continuous and bright, the whole is coordinated, and the landscape effect is good.
The continuous rigid frame is a common bridge structure form, and in order to enhance the spanning capability of the bridge type, the pier adopts a double-limb thin-wall pier and a pier beam fixed connection form; the side piers are flexible in temperature suitable for the length range of the beam and are mostly arranged into longitudinal movable supports. When the pier is higher, especially in an earthquake region, overlarge beam pier relative displacement occurs on the longitudinally movable side pier under the action of horizontal earthquake force, and the beam falling risk of the structure is increased.
The conventional treatment method is to increase the thrust rigidity of the pier by increasing the thickness of the middle pier, so that the double-limb thin-wall pier is arranged on the continuous rigid frame to reduce the thrust rigidity, the design concept of increasing the bending rigidity is contrary, the material consumption of the middle pier is more, and the manufacturing cost is relatively higher.
SUMMERY OF THE UTILITY MODEL
In order to overcome at least partially the above-mentioned problems in the prior art, the utility model provides a continuous rigid frame bridge of no support single limb thin wall mound.
The utility model provides a continuous rigid frame bridge of no support single limb thin wall mound, include: the main beam, the single-limb middle pier, the first double-limb side pier and the second double-limb side pier; the first double-limb side pier and the second double-limb side pier respectively comprise an upper pier body and a lower pier body, the upper pier body is rigidly connected with the lower pier body, the upper pier body comprises a first limb column and a second limb column, the first limb column and the second limb column are fixedly connected with the main beam, and an inter-limb tie beam is arranged between the first limb column and the second limb column; the height of the first limb column of the first double limb pier is greater than the height of the second limb column of the first double limb pier; the single-limb middle pier is fixedly connected with the main beam.
When the span is less than 25m, the main beam is of a reinforced concrete plate beam structure; when the span is more than 25m, the main beam is of a conventional prestressed concrete box girder structure; when the span is larger than 48m, the main beam is a high-degree prestressed concrete box girder structure.
Wherein, the cross-sectional shape of pier shaft down is circular or square.
Wherein the cross section of the pier in the single limb is round or rectangular.
Wherein, the bottom of the lower pier body is provided with a foundation and a bearing platform; wherein the foundation is disposed in a basement layer suitable for engineering geology below the surface of the earth; the bearing platform is positioned above the foundation and is connected with the top of the foundation into a whole; the lower pier shaft is arranged on the bearing platform and is rigidly connected with the bearing platform.
Wherein, be provided with the cross-sectional shape on the lower pier body and be the through-hole of rectangle or polygon.
Wherein, a through hole with a rectangular or polygonal cross section is arranged on the first limb column and/or the second limb column.
Wherein the linear stiffness of the main beam is greater than five times the linear stiffness of the first and second limb columns.
To sum up, the utility model provides a continuous rigid frame bridge of no support single limb thin wall mound, the mound all with the girder rigid coupling in the first limb post of first double limb limit mound, the second limb post of first double limb limit mound, the first limb post of second double limb limit mound, the second limb post and the single limb of second double limb limit mound, the height that highly is greater than the second limb post of first double limb limit mound of first double limb post, be provided with the tie beam between the limb in the middle of the first limb post of first double limb limit mound and the second limb post of first double limb limit mound, be provided with the tie beam between the limb in the middle of the first limb post of second double limb limit mound and the second limb post of second double limb mound. The utility model provides a continuous rigid frame bridge of support-free single-limb thin-wall pier, which is free from support, avoids support damage, saves cost, has low later maintenance cost and avoids the relevant problems caused by support replacement; the pier beams are directly connected in a fixed mode, lines are continuous and bright, the whole is coordinated, and the landscape effect is good; meanwhile, the middle pier of the traditional scheme is changed from a double-limb thin-wall pier to a single-limb thin-wall pier, so that the integral thrust rigidity of the full link is increased, the risk of beam falling in an earthquake area is thoroughly solved, the thrust rigidity of the middle pier is not increased, the material consumption of the middle pier can be saved, and the manufacturing cost is reduced.
Drawings
Fig. 1 is a schematic structural diagram of a support-free single-limb thin-wall pier continuous rigid frame bridge according to an embodiment of the present invention;
fig. 2 is a schematic structural view of an inter-limb tie beam arranged between a first limb column and a second limb column of a second double-limb side pier in a support-free single-limb thin-wall pier continuous rigid frame bridge according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of the upper pier body and the lower pier body of the first double-limb side pier in the support-free single-limb thin-wall pier continuous rigid frame bridge according to the embodiment of the present invention, which are provided with through holes.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The present embodiment provides a support-free single-limb thin-wall pier continuous rigid frame bridge, referring to fig. 1 and 2, including: the main beam, the single-limb middle pier, the first double-limb side pier and the second double-limb side pier; wherein,
the first double-limb side pier and the second double-limb side pier respectively comprise an upper pier body and a lower pier body, the upper pier body is rigidly connected with the lower pier body, the upper pier body comprises a first limb column and a second limb column, the first limb column and the second limb column are fixedly connected with the main beam, and an inter-limb tie beam is arranged between the first limb column and the second limb column;
the height of the first limb column of the first double limb pier is greater than the height of the second limb column of the first double limb pier;
the single-limb middle pier is fixedly connected with the main beam.
Wherein, the main beam comprises a continuous rigid frame 4b, a beam body 3 and another continuous rigid frame 4 a.
Wherein, the single-limb middle pier 5, the first double-limb side pier and the second double-limb side pier are all of reinforced concrete structures.
Specifically, the upper end of a first limb column 1a of the first double-limb side pier is fixedly connected with a continuous rigid frame 4b, and the upper end of a second limb column 1b of the first double-limb side pier is fixedly connected with one end of a beam body 3; the height of the first limb column 1a of the first double limb pier is greater than that of the second limb column 1b of the first double limb pier;
the upper end of a first limb column 2a of the second double-limb side pier is fixedly connected with the other end of the beam body 3; the upper end of a second limb column 2b of the second double-limb side pier is fixedly connected with another connecting continuous rigid frame 4 a;
the single-limb middle pier 5 is fixedly connected with the beam body 3.
Wherein, be provided with the tie beam between first limb in the middle of the first limb post 1a of first double limb side pier and the second limb post 1b of first double limb side pier, improved the stability of pier.
Wherein, the second inter-limb tie beam 2c is arranged between the first limb column 2a of the second double-limb pier and the second limb column 2b of the second double-limb pier, so that the stability of the pier is improved.
The embodiment provides a continuous rigid frame bridge of support-free single-limb thin-wall pier, the piers in the first limb column of first double-limb side pier, the second limb column of first double-limb side pier, the first limb column of second double-limb side pier, the second limb column of second double-limb side pier and the single limb all with girder rigid coupling, the height of the first limb column of first double-limb side pier is greater than the height of the second limb column of first double-limb side pier, be provided with the inter-limb tie beam in the middle of the first limb column of first double-limb side pier and the second limb column of first double-limb side pier, be provided with the inter-limb tie beam in the middle of the first limb column of second double-limb side pier and the second limb column of second double-limb side pier. The support-free single-limb thin-wall pier continuous rigid frame bridge provided by the embodiment has the advantages that the support is not arranged, the support damage is avoided, the cost is saved, the later maintenance cost is low, and the related problems caused by support replacement are avoided; the pier beams are directly connected in a fixed mode, lines are continuous and bright, the whole is coordinated, and the landscape effect is good; meanwhile, the middle pier of the traditional scheme is changed from a double-limb thin-wall pier to a single-limb thin-wall pier, so that the integral thrust rigidity of the full link is increased, the risk of beam falling in an earthquake area is thoroughly solved, the thrust rigidity of the middle pier is not increased, the material consumption of the middle pier can be saved, and the manufacturing cost is reduced.
In another embodiment of the present invention, on the basis of the above embodiment, when the span is less than 25m, the main beam is a reinforced concrete slab beam structure;
when the span is more than 25m, the main beam is of a conventional prestressed concrete box girder structure;
when the span is larger than 48m, the main beam is a high-degree prestressed concrete box girder structure.
In another embodiment of the present invention, on the basis of the above embodiment, the cross-sectional shape of the lower pier body is circular or square.
Specifically, the cross section of the lower pier body of the first double-limb pier is round or square; the cross-sectional shape of the lower body of the second double limb pier is round or square.
Preferably, the cross-sectional shape of the lower body of the first double-limb pier is circular; the cross-sectional shape of the lower body of the second double limb pier is circular.
The embodiment provides a continuous rigid frame bridge of no support single limb thin wall mound, and the cross sectional shape of the lower pier body of first double limb side mound is circular, and the cross sectional shape of the lower pier body of second double limb side mound is circular, has not only improved the anti ability of hitting of lower pier body, has also reduced the resistance to rivers.
In another embodiment of the present invention, on the basis of the above embodiment, the sectional shape of the pier in the single limb is circular or rectangular.
Preferably, the cross-sectional shape of the piers 5 in a single limb is rectangular.
In another embodiment of the present invention, on the basis of the above embodiment, a foundation and a bearing platform are installed at the bottom of the lower pier body; wherein,
the foundation is arranged in a foundation layer suitable for engineering geology below the ground surface;
the bearing platform is positioned above the foundation and is connected with the top of the foundation into a whole;
the lower pier shaft is arranged on the bearing platform and is rigidly connected with the bearing platform.
Specifically, the bottom of the lower pier body of the first double-limb pier is provided with a foundation and a bearing platform; the bottom of the lower pier body of the second double-limb pier is provided with a foundation and a bearing platform.
In another embodiment of the present invention, on the basis of the above embodiment, referring to fig. 3, a through hole having a rectangular or polygonal cross-sectional shape is provided on the lower pier body.
Specifically, a through hole with a rectangular or polygonal cross section is arranged on the lower pier body of the first double-limb pier; the lower pier body of the second double-limb-side pier is provided with a through hole with a rectangular or polygonal cross section.
Preferably, a through hole with a polygonal cross section is formed in the lower pier body of the first double-limb side pier; the lower pier body of the second double limb side pier is provided with a through hole with a polygonal cross section.
The embodiment provides a continuous rigid frame bridge of a support-free single-limb thin-wall pier, a through hole with a rectangular or polygonal cross section is formed in the lower pier body, and the concrete consumption of the lower pier body is saved.
In another embodiment of the present invention, on the basis of the above embodiment, a through hole with a rectangular or polygonal cross section is provided on the first limb column and/or the second limb column.
Specifically, a through hole with a rectangular or polygonal cross section is arranged on the first limb column 1a of the first double-limb pier and/or the second limb column 1b of the first double-limb pier;
the first limb column 2a of the second double limb pier and/or the second limb column 2b of the second double limb pier are/is provided with through holes with rectangular or polygonal cross-sectional shapes.
Preferably, the first limb column 1a of the first double-limb pier and/or the second limb column 1b of the first double-limb pier are/is provided with through holes with polygonal cross-sectional shapes;
the first limb column 2a of the second double limb pier and/or the second limb column 2b of the second double limb pier are/is provided with through holes with polygonal cross-sectional shapes.
The embodiment provides a continuous rigid frame bridge of no support single limb thin wall mound, is provided with the cross sectional shape on first limb post and/or the second limb post and is the through-hole of rectangle or polygon, has saved the concrete volume of going up the pier shaft.
In another embodiment of the present invention, on the basis of the above embodiment, the linear stiffness of the main beam is greater than five times the linear stiffness of the first and second limb columns.
Specifically, in order to ensure that the first limb column and the second limb column have smaller thrust rigidity, can adapt to longitudinal temperature expansion and contraction deformation of the main beam, and only a smaller bending moment is distributed to the first limb column and the second limb column at the beam end of the main beam, the following conditions are met:
the linear rigidity of the main beam is five times higher than that of the first limb column;
the linear stiffness of the main beam is five times greater than the linear stiffness of the second limb column.
Preferably, E1A1/L1＞5*E2A2/L2(ii) a Wherein,
E1the modulus of elasticity of the girder; a. the1The cross-sectional area of the main beam; l is1The length of the main beam;
E2is the modulus of elasticity of the first limb column or the second limb column; a. the2Is the cross-sectional area of the first limb column or the second limb column; l is2Is the length of the first limb post or the second limb post.
Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations fall within the scope defined by the appended claims.
Claims (8)
1. The utility model provides a continuous rigid frame bridge of no support single limb thin wall mound which characterized in that includes: the main beam, the single-limb middle pier, the first double-limb side pier and the second double-limb side pier; wherein,
the first double-limb side pier and the second double-limb side pier respectively comprise an upper pier body and a lower pier body, the upper pier body is rigidly connected with the lower pier body, the upper pier body comprises a first limb column and a second limb column, the first limb column and the second limb column are fixedly connected with the main beam, and an inter-limb tie beam is arranged between the first limb column and the second limb column;
the height of the first limb column of the first double limb pier is greater than the height of the second limb column of the first double limb pier;
the single-limb middle pier is fixedly connected with the main beam.
2. The continuous rigid frame bridge of the support-free single-limb thin-wall pier is characterized in that when the span is less than 25m, the main beam is of a reinforced concrete plate beam structure;
when the span is more than 25m, the main beam is of a conventional prestressed concrete box girder structure;
when the span is larger than 48m, the main beam is a high-degree prestressed concrete box girder structure.
3. The continuous rigid frame bridge of the support-free single-limb thin-wall pier as claimed in claim 1, wherein the cross-sectional shape of the lower pier body is circular or square.
4. The continuous rigid frame bridge of the support-free single-limb thin-wall pier is characterized in that the cross section of the pier in the single limb is circular or rectangular.
5. The continuous rigid frame bridge of the support-free single-limb thin-wall pier is characterized in that a foundation and a bearing platform are installed at the bottom of the lower pier body; wherein,
the foundation is arranged in a foundation layer suitable for engineering geology below the ground surface;
the bearing platform is positioned above the foundation and is connected with the top of the foundation into a whole;
the lower pier shaft is arranged on the bearing platform and is rigidly connected with the bearing platform.
6. The continuous rigid frame bridge of the support-free single-limb thin-wall pier is characterized in that a through hole with a rectangular or polygonal cross section is formed in the lower pier body.
7. The continuous rigid frame bridge of the support-free single-limb thin-wall pier is characterized in that the first limb column and/or the second limb column are/is provided with through holes with rectangular or polygonal cross sections.
8. The continuous rigid frame bridge of claim 1, wherein the linear stiffness of the main beam is greater than five times the linear stiffness of the first and second limb columns.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721427409.7U CN207362673U (en) | 2017-10-31 | 2017-10-31 | One kind is without bearing list limb Continuous Rigid-Frame Bridge with Thin-Wall Piers |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721427409.7U CN207362673U (en) | 2017-10-31 | 2017-10-31 | One kind is without bearing list limb Continuous Rigid-Frame Bridge with Thin-Wall Piers |
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| CN207362673U true CN207362673U (en) | 2018-05-15 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109371799A (en) * | 2018-10-29 | 2019-02-22 | 中铁第四勘察设计院集团有限公司 | Tramway track beam steel structure system |
| CN111155410A (en) * | 2020-01-19 | 2020-05-15 | 中交公路规划设计院有限公司 | Continuous bridge floor and medium and small span continuous rigid frame composite structure |
-
2017
- 2017-10-31 CN CN201721427409.7U patent/CN207362673U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109371799A (en) * | 2018-10-29 | 2019-02-22 | 中铁第四勘察设计院集团有限公司 | Tramway track beam steel structure system |
| CN111155410A (en) * | 2020-01-19 | 2020-05-15 | 中交公路规划设计院有限公司 | Continuous bridge floor and medium and small span continuous rigid frame composite structure |
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