CN211395406U - Anti-overturning device of single-column pier bridge - Google Patents
Anti-overturning device of single-column pier bridge Download PDFInfo
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- CN211395406U CN211395406U CN201922186890.0U CN201922186890U CN211395406U CN 211395406 U CN211395406 U CN 211395406U CN 201922186890 U CN201922186890 U CN 201922186890U CN 211395406 U CN211395406 U CN 211395406U
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Abstract
An anti-overturning device of a single-column pier bridge comprises a cantilever beam fixed at the top of the single-column pier, wherein the cantilever beam is connected with the peripheral surface of the top of the single-column pier through an annular hoop and extends to two sides of the single-column pier in parallel to a cantilever plate of a main beam; diagonal braces are arranged between the webs on the two sides of the main beam and the cantilever beams, and a plurality of prestressed cables are vertically connected between the cantilever plates of the main beam and the cantilever beams; the single-column pier support is arranged between the top surface of the single-column pier and the bottom plate of the main beam, the cantilever beam supports are arranged between the bottom plates of the main beams on the two sides of the single-column pier and the cantilever beams, and the buffer blocks are arranged between the edges of the bottom plates and the cantilever beams. The utility model discloses cantilever beam, a plurality of cantilever beam support, buffer block, bracing and prestressed cable, these five partial structures provide antidumping ability jointly, and each other combines each other, and each other is supplementary, and then the security performance of reinforcing single-column pier bridge that can be great during the operation.
Description
Technical Field
The utility model belongs to bridge structures consolidates the field, concretely relates to antidumping device of single-column mound bridge.
Background
The single-pier bridge occupies small space, is attractive in appearance, can save the use amount of pier materials due to more piers, has good economic indexes, and is widely applied to highway ramp bridges, overpasses and urban overpasses. However, the shortcoming of single-column pier bridge is also comparatively obvious, because the single-column pier structure is mostly single bearing structure, when the vehicle overloads and off-centre goes on the bridge, will make the atress of bridge both sides produce great gap, can make bridge beam supports to come to nothing when serious, and what more can lead to the bridge to turn on one's side, causes serious incident.
In recent years, a safety accident of a single-column pier bridge occurs. 10 months and 10 nights in 2019, a bridge deck rollover accident happens to a viaduct without tin 312 national roads in Jiangsu, so that 3 people die and 2 people are injured, the accident causes the thinking of bridge workers on the safety of the single-column pier bridge, and especially the anti-overturning device of the single-column pier bridge with an obvious effect is urgently needed to be researched.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an antidumping device of single-column mound bridge to the problem that single-column mound bridge factor of safety is not enough among the above-mentioned prior art, reinforcing single-column mound bridge security performance during the operation that can be comparatively obvious.
In order to achieve the above object, the present invention provides the following technical solutions:
an anti-overturning device of a single-column pier bridge comprises a cantilever beam fixed at the top of the single-column pier, wherein the cantilever beam is connected with the peripheral surface of the top of the single-column pier through an annular hoop and extends to two sides of the single-column pier in parallel to a cantilever plate of a main beam; diagonal braces are arranged between the webs on the two sides of the main beam and the cantilever beams, and a plurality of prestressed cables are vertically connected between the cantilever plates of the main beam and the cantilever beams; the single-column pier is characterized in that a single-column pier support is arranged between the top surface of the single-column pier and the bottom plate of the main beam, a plurality of cantilever beam supports are arranged between the bottom plates of the main beams on two sides of the single-column pier and the cantilever beams, and a buffer block is arranged between the edge of the bottom plate and the cantilever beams.
Preferably, the annular hoop consists of two semicircular parts, the edges of the two parts of the annular hoop are butted through first bolts, and a plurality of second bolts are arranged on the surface of the annular hoop and connected with the peripheral surface of the top of the single-column pier.
Preferably, the single-column pier support is arranged between the center of the top surface of the single-column pier and the center line of the bottom plate of the main beam, the axis of the single-column pier is perpendicular to the center line of the main beam, and the cantilever beam, the annular anchor ear, the inclined strut, the prestressed cable and the cantilever beam support are symmetrically arranged on two sides of the single-column pier relative to the axis of the single-column pier.
Preferably, the upper surface of the cantilever beam is kept flush with the top surface of the single-column pier, and the height of the cantilever beam support is equal to that of the single-column pier support.
Preferably, the buffer block is a rubber buffer block, the bottom surface of the buffer block is fixed on the cantilever beam, a gap is reserved between the top surface of the buffer block and the bottom plate of the main beam, and the gaps between the buffer blocks on the two sides of the main beam and the bottom plate of the main beam are equal.
Preferably, the length of the buffer block along the longitudinal bridge direction is consistent with that of the cantilever beam.
Preferably, the cantilever beam, the annular hoop and the inclined strut are all made of steel, and the cantilever beam support is a basin-type rubber support.
Preferably, the surface of the prestressed cable is coated with a layer of epoxy resin anticorrosive paint and sleeved with a PVC pipe; the prestressed cable passes through a reserved hole in the beam body of the main beam and is anchored at the top of the main beam, and passes through a reserved hole in the beam body of the cantilever beam and is anchored at the bottom of the cantilever beam.
Compared with the prior art, the utility model discloses following beneficial effect: the upper part of the single-column pier is reinforced by the annular hoop, so that the upper part of the pier can be prevented from being damaged by large force transmitted from the cantilever beam body under the action of the overturning bending moment. A plurality of cantilever beam supports are arranged on the surface of the cantilever beam, so that multi-point support can be provided when the main beam overturns, and the anti-overturning capacity is enhanced. The bottom plate edge below of girder is provided with the buffer block, reduces the impact force when the girder topples, additionally provides a support, strengthens girder's antidumping ability. The inclined struts are arranged between the web plates at the two sides of the main beam and the cantilever beam, when the main beam acts on the overturning bending moment, the inclined strut at one side of the overturning provides pressure, and the inclined strut at the other side of the overturning provides tension, so that the anti-overturning capacity of the main beam can be effectively enhanced. Compared with the traditional scheme that a single prestressed cable is arranged on the side of the main beam, when the main beam overturns, the sum of the self weight of the main beam and the load of a vehicle is large, so that the tension in the prestressed cable is easy to be overlarge, the prestressed cable is broken, and the anti-overturning capability cannot be effectively provided. The utility model discloses provide pulling force by many prestressed cables jointly, when the moment of flexure that topples is the same, reduce the pulling force that every prestressed cable will provide. When the overturning deformation is the same, larger pulling force can be provided. Therefore, the utility model discloses can effectively prevent that prestressed cable from being broken to show and improve antidumping ability. In the prior art, when a main beam overturns, the anchoring point of a prestressed cable is easy to damage due to the fact that the tension in a single prestressed cable is large. The utility model discloses can reduce the pulling force in the every prestressed cable, and then effectively avoid anchor point department to produce and destroy. Through the cantilever beam that extends to the both sides of single-column mound, can make the prestressed cable lean on the outside of girder cantilever slab to arrange, increase the distance between prestressed cable and the girder central line, and then the increase arm of force can provide bigger antidumping moment under the same pulling force. The utility model discloses cantilever beam, a plurality of cantilever beam support, buffer block, bracing and prestressed cable, these five partial structures provide antidumping ability jointly, and each other combines each other, and each other is supplementary, and then the security performance of reinforcing single-column pier bridge that can be great during the operation.
Further, the utility model discloses PVC pipe is established to prestressed cable one deck epoxy anticorrosive paint and cover with a brush on surface, can effectively play anticorrosive effect, and prestressed cable atress is less during the normal operation of bridge for the durability of prestressed cable is better.
Drawings
FIG. 1 is a front view of an assembly structure of the device of the present invention;
FIG. 2 is a top view of the assembly structure of the device of the present invention;
in the drawings: 1-a main beam; 2-single column pier; 3-annular hoop; 4-single column pier support; 5-cantilever beam; 6-cantilever beam support; 7-a buffer block; 8-diagonal bracing; 9-a prestressed cable; 10-PVC pipe.
Detailed Description
The embodiments of the present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1-2, the utility model provides an antidumping device of single-column mound bridge, including fixing the cantilever beam 5 at single-column mound 2 top, cantilever beam 5 links to each other globally with single-column mound 2's top through annular staple bolt 3, and annular staple bolt 3 comprises semicircular two parts, through the butt joint of first bolt 11 between the edge of two parts annular staple bolt 3, and annular staple bolt 3's surface mounting has second bolt 12, is connected global with single-column mound 2 tops. The cantilever beams 5 extend to two sides of the single-column pier 2 in parallel with the cantilever plate of the main beam 1; inclined struts 8 are arranged between the webs on the two sides of the main beam 1 and the cantilever beams 5, and prestressed cables 9 are vertically connected between the cantilever plates of the main beam 1 and the cantilever beams 5; coating a layer of epoxy resin anticorrosive paint on the surface of the prestressed cable 9 and sleeving a PVC pipe 10; the prestressed cable 9 passes through a reserved hole in the girder body of the girder 1 and is anchored at the top of the girder 1, and passes through a reserved hole in the girder body of the cantilever 5 and is anchored at the bottom of the cantilever 5. Set up single-column pier support 4 between the top surface of single-column pier 2 and the bottom plate of girder 1, be provided with two cantilever beam supports 6 between the bottom plate of single-column pier 2 both sides girder 1 and cantilever beam 5, the upper surface of cantilever beam 5 keeps the parallel and level with the top surface of single-column pier 2, and cantilever beam support 6 equals with the height of single-column pier support 4. A buffer block 7 is arranged between the edge of the bottom plate and the cantilever beam 5. The single-column pier support 4 is arranged between the center of the top surface of the single-column pier 2 and the center line of the bottom plate of the main beam 1, the axis of the single-column pier 2 is perpendicular to the center line of the main beam 1, and the cantilever beam 5, the annular anchor ear 3, the inclined strut 8, the prestressed cable 9 and the cantilever beam support 6 are symmetrically arranged on two sides of the single-column pier 2 relative to the axis of the single-column pier 2. Buffer block 7 adopts the rubber buffer block, and the bottom surface of buffer block 7 is fixed on cantilever beam 5, leaves the clearance between the top surface of buffer block 7 and the bottom plate of girder 1, and the clearance between the buffer block 7 of girder 1 both sides and the bottom plate of girder 1 equals, and buffer block 7 is unanimous with cantilever beam 5 along the length of vertical bridge. The cantilever beam 5, the annular hoop 3 and the inclined strut 8 are all made of steel, and the cantilever beam support 6 is a basin-type rubber support.
In fig. 1, when the main beam 1 turns sideways leftwards, the right prestressed cable 9 and the inclined strut 8 provide tension, the left inclined strut 8 provides pressure, and the left cantilever beam support 6 can ensure that the main beam 1 has multi-point support, so that the anti-overturning capability of the main beam 1 is improved; when the overturning bending moment is large, besides the three parts providing the anti-overturning moment, the web plate on the left side of the main beam 1 is in contact with the buffer block 7, the buffer block 7 provides an additional layer of support, and the cantilever beam 5 can also provide the anti-overturning capacity. When the main beam 1 turns to the right, the anti-overturning mechanism of the device is similar to that of the main beam. Five parts of the cantilever beam, the cantilever beam support, the buffer block, the inclined strut and the prestressed cable are mutually coordinated and complementary, the anti-overturning capacity is provided jointly, and the safety of the single-column pier bridge in the operation period can be ensured.
Although the invention has been illustrated above by means of a specific example, this example is only intended to aid understanding of the method and the core idea of the invention, and should not be interpreted as limiting the invention, for example: the number of the newly-added supports 6, the number of the prestressed cables 9, the connection mode of the inclined struts 8 and the beam body and the like can be changed according to the actual condition of the bridge. Various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims, and all such changes and substitutions as fall within the scope of the appended claims are intended to be embraced therein.
Claims (8)
1. The utility model provides an antidumping device of single-column mound bridge which characterized in that: the cantilever beam (5) is fixed on the top of the single-column pier (2), the cantilever beam (5) is connected with the circumferential surface of the top of the single-column pier (2) through an annular hoop (3), and the cantilever beam (5) extends to the two sides of the single-column pier (2) in parallel to a cantilever plate of the main beam (1); inclined struts (8) are arranged between the webs on the two sides of the main beam (1) and the cantilever beams (5), and a plurality of prestressed cables (9) are vertically connected between the cantilever plates of the main beam (1) and the cantilever beams (5); the single column pier support (4) is arranged between the top surface of the single column pier (2) and the bottom plate of the main beam (1), a plurality of cantilever beam supports (6) are arranged between the bottom plate of the main beam (1) on two sides of the single column pier (2) and the cantilever beams (5), and the buffer block (7) is arranged between the edge of the bottom plate and the cantilever beams (5).
2. The anti-overturning device for the single-pier bridge of claim 1, wherein: the annular hoop (3) is composed of two semicircular parts, the edges of the two annular hoops (3) are in butt joint through first bolts (11), and a plurality of second bolts (12) are mounted on the surface of the annular hoop (3) and are connected with the circumferential surface of the top of the single-column pier (2).
3. The anti-overturning device for the single-pier bridge of claim 1, wherein: single-column pier support (4) set up between the bottom plate center line position of the top surface center of single-column pier (2) and girder (1), the axis of single-column pier (2) and the perpendicular quadrature of the center line of girder (1), cantilever beam (5), annular staple bolt (3), bracing (8), prestressed cable (9) and cantilever beam support (6) about the axis symmetrical arrangement of single-column pier (2) in the both sides of single-column pier (2).
4. The anti-overturning device for the single-pier bridge of claim 1, wherein: the upper surface of the cantilever beam (5) is kept flush with the top surface of the single-column pier (2), and the heights of the cantilever beam support (6) and the single-column pier support (4) are equal.
5. The anti-overturning device for the single-pier bridge according to claim 1 or 4, wherein: buffer block (7) adopt the rubber buffer block, the bottom surface of buffer block (7) is fixed on cantilever beam (5), leaves the clearance between the top surface of buffer block (7) and the bottom plate of girder (1), the clearance between buffer block (7) and girder (1) bottom plate of girder (1) both sides equals.
6. The anti-overturning device for the single-pier bridge of claim 1, wherein:
the length of the buffer block (7) along the longitudinal bridge direction is consistent with that of the cantilever beam (5).
7. The anti-overturning device for the single-pier bridge of claim 1, wherein: the cantilever beam (5), the annular hoop (3) and the inclined strut (8) are all made of steel, and the cantilever beam support (6) is a basin-type rubber support.
8. The anti-overturning device for the single-pier bridge of claim 1, wherein: the surface of the prestressed cable (9) is coated with a layer of epoxy resin anticorrosive paint and sleeved with a PVC pipe (10); the prestressed cable (9) penetrates through a reserved hole in the girder body of the girder (1) and is anchored at the top of the girder (1), and penetrates through a reserved hole in the girder body of the cantilever beam (5) and is anchored at the bottom of the cantilever beam (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922186890.0U CN211395406U (en) | 2019-12-09 | 2019-12-09 | Anti-overturning device of single-column pier bridge |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922186890.0U CN211395406U (en) | 2019-12-09 | 2019-12-09 | Anti-overturning device of single-column pier bridge |
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| CN211395406U true CN211395406U (en) | 2020-09-01 |
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| CN201922186890.0U Active CN211395406U (en) | 2019-12-09 | 2019-12-09 | Anti-overturning device of single-column pier bridge |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112663522A (en) * | 2021-01-12 | 2021-04-16 | 山西省交通科技研发有限公司 | Chemical treatment method for safety risk of single-column pier bridge |
| CN112663521A (en) * | 2021-01-12 | 2021-04-16 | 山西省交通科技研发有限公司 | Improvement and reconstruction method for transverse anti-overturning performance of bridge |
-
2019
- 2019-12-09 CN CN201922186890.0U patent/CN211395406U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112663522A (en) * | 2021-01-12 | 2021-04-16 | 山西省交通科技研发有限公司 | Chemical treatment method for safety risk of single-column pier bridge |
| CN112663521A (en) * | 2021-01-12 | 2021-04-16 | 山西省交通科技研发有限公司 | Improvement and reconstruction method for transverse anti-overturning performance of bridge |
| CN112663522B (en) * | 2021-01-12 | 2022-05-27 | 山西省交通科技研发有限公司 | Chemical treatment method for safety risk of single-column pier bridge |
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