CN104878687A - Semi-integral seamless slope bridge head structure - Google Patents
Semi-integral seamless slope bridge head structure Download PDFInfo
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- CN104878687A CN104878687A CN201510331482.3A CN201510331482A CN104878687A CN 104878687 A CN104878687 A CN 104878687A CN 201510331482 A CN201510331482 A CN 201510331482A CN 104878687 A CN104878687 A CN 104878687A
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- bridge
- abutment
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- attachment strap
- ground anchor
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Abstract
The invention discloses a semi-integral seamless slope bridge head structure which comprises a main beam, a semi-integral bridge abutment, a bridging slab, a ground anchor beam and an approach pavement, wherein the main beam and the bridge abutment adopt separate structures; the main beam is placed on the abutment cap of the bridge abutment through a support seat; a bridge abutment back wall is also arranged on the semi-integral bridge abutment; the near-abutment end of the bridging slab is connected together with the main beam through main reinforcement; the ground anchor beam is arranged at the far-abutment end of the bridging slab, and the ground anchor beam and the far-abutment end of the bridging slab form an integral through pouring; the ground anchor beam extends into a ground base layer; one or more layers of steel reinforcement are arranged in the bridging slab; each layer of the steel reinforcement downwards extends into the ground anchor beam; the approach pavement is continuously spread on the main beam and the bridging slab. The semi-integral seamless slope bridge head structure has the advantages that the deformation of the main beam is absorbed by a deck expansion joint at a relatively high elevation, and a slope base bridge head of a slope bridge does not deform, so that no expansion joint needs to be formed in the slope base bridge head, and then the maintenance cost and the noise pollution are reduced.
Description
Technical field
The invention belongs to bridge field, particularly relate to a kind of Ramp bridge end of the bridge structure adopting semi-integral bridge abutment in absolute altitude lower.
Background technology
For adapting to the requirement of bridge construction distortion, usually between two beam-ends, between beam-ends and abutment, shrinkage joint is set.But arranging of deck expansion joint can bring jumping car problem, jumps car and not only can cause very large impact force to bridge and road surface, but also can reduce the driving comfort level of driver and passenger.In addition deck expansion joint is fragile, needs periodic maintenance or replacing, not only increases maintenance cost, also can affect traffic during maintenance.Moreover for building the viaduct in city, the impact force that jumping car causes will produce larger noise, the life of resident near impact.
For the problems referred to above, bridge design person and the continuous design studies of builder go out various seamless bridge structure.
Chinese invention patent application numbers 200310110474.3 discloses one " complete seamless bridge in road ", attachment strap arranges relative to inclination by this bridge construction, and full duration arranges single or multiple lift earth working material in the above road surface of attachment strap or roadbed, when bridge deformation, attachment strap is out of shape with beam body, and after beam body deformability being passed to platform in soil structures, by earth working material, distortion is absorbed.But the bridge of this structure is by being only applicable to the situation adopting Asphalt Concrete Deck Pavement and bituminous concrete road pavement, the long scope of application of bridge is extremely limited, for also inapplicable Ramp bridge.
Application number be 200810107509.0 Chinese invention patent application disclose one " structure of continuously reinforced link road pavement for seamless bridge ", this seamless bridge is when being out of shape, attachment strap is out of shape with girder equally, and main beam deformation is passed in backstage soil structures and concrete joint circuit surface, link panel full duration arranges the elongated reinforcing bar of individual layer and is spread safely by larger main beam deformation and receive, thus reaches the seamless effect of bridge.This seamless bridge in actual use, allows link panel to form tiny crack to adapt to the distortion of girder, and be positioned at dry area or Drainage Design better area time, the impact of road slab fine cracks is little; But for comparatively moist south or the poor area of end of the bridge draining, then there is moisture and infiltrate road slab by crack and make the risk of corrosion of steel bar, and then affect the application life of road.
Application number be 201310149773.1 Chinese invention patent application disclose " a kind of seamless bridge neotectonics and construction method thereof adopting balance arm ", this seamless bridge utilizes the longitudinal strain freely swinging to realize bridge beam body of balance arm (i.e. Z-shaped attachment strap), and for the ease of the swing of balance arm (i.e. Z-shaped attachment strap), need to arrange expansion joint (E.J.) at balance arm (i.e. Z-shaped attachment strap) periphery.When girder temperature drop shrinks, then very easily form larger shrinkage crack at expansion joint (E.J.) place and reflex to road surface, and affecting the normal use of road.
Application number be 201320460439.3 Chinese utility model patent disclose " a kind of bridgehead structures of seamless type ", the thickening extension cracking that easily cause road surface same with the gap between transition slab at bridge head of this bridgehead structures leveling layer.
In addition, existing seamless bridge structure is not all suitable for the Ramp bridge structure having certain slope, and also because the inclination main beam structure of Ramp bridge has the weight component of moving under slope, thus it is extremely uneven that beam-ends is stretched with the distortion of contracting.Moreover, inventor thinks, being out of shape due to bridge temperature influence is objective fact, therefore fully phasing out shrinkage joint can only cause road pavement damaged, for this reason only by reducing the quantity at shrinkage joint to reduce maintenance cost and noise pollution as far as possible, inventor is set out by this point just, through long-term practice research, has this case to produce eventually.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of seamless Ramp bridge end of the bridge structure of semi-monolithic formula cancelling end of the bridge shrinkage joint at the bottom of Ramp bridge slope.
For solving the problems of the technologies described above, technical solution of the present invention is:
A kind of semi-monolithic formula Ramp bridge end of the bridge structure, comprise girder, semi-integral bridge abutment, attachment strap, anchor beam and road pavement; This girder and abutment are that split constructs, and it is placed on the platform cap of abutment by bearing, and this abutment is also provided with abutment parados; The near platform end of this attachment strap and this girder are linked together by main muscle, and the far platform end of this attachment strap is provided with to water with it and builds up an overall described ground anchor beam, and this ground anchor beam extend within ground layer; Be provided with at least one deck reinforcing bar in described attachment strap, and every layer of reinforcing bar all extends downward within described ground anchor beam; This road pavement continuous laying is above girder and attachment strap.
Preferably, be provided with top reinforcement and the two-layer reinforcing bar of lower floor's reinforcing bar in described attachment strap, two-layer reinforcing bar all extends downward within described ground anchor beam.
Preferably, described main muscle becomes an entirety with the superiors' bar connecting in described attachment strap.
Preferably, multiple monobloc cast with it ground anchor beam together can be provided with under described attachment strap.
Preferably, should with described girder consolidation from the bridge pier that described abutment is nearest below described girder.
After adopting such scheme, because the present invention is provided with the ground anchor beam be cast in it together below attachment strap far platform end, thus make the end of the bridge of Ramp bridge tightly be stabilized in the basic unit on road surface, therefore can be withstood by ground anchor beam and attachment strap when main beam deformation extends and make girder to the distortion of top, slope, then by attachment strap pulling force and girder deadweight component, girder is out of shape at the bottom of slope when main beam deformation shortens, the shrinkage joint that the distortion of such girder is all pushed up by slope is received, at the bottom of the slope of Ramp bridge, end of the bridge does not produce distortion, thus without the need to arranging shrinkage joint, and then reduce maintenance cost and noise pollution.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
Disclosed is a kind of seamless Ramp bridge end of the bridge structure adopting semi-integral bridge abutment in absolute altitude lower, as shown in Figure 1, is preferred embodiment of the present invention.Described seamless Ramp bridge end of the bridge comprise girder 1, semi-integral bridge abutment 3, attachment strap 5, anchor beam 6 and road pavement 7.Wherein:
Described girder 1 is with abutment 3 for split constructs, and it is placed on the platform cap of abutment 3 by bearing 12, and this semi-integral bridge abutment 3 is also provided with abutment parados 4.
Described attachment strap 5 near platform end and described girder 1 are linked together by main muscle 8, and the far platform end of this attachment strap 5 is provided with to water with it and builds up an overall ground anchor beam 6, and this ground anchor beam 6 extend within ground layer 11.
Be provided with at least one deck reinforcing bar in described attachment strap 5, in the present embodiment, be provided with top reinforcement 9 and the two-layer reinforcing bar of lower floor's reinforcing bar 10, and every layer of reinforcing bar all extends downward within described ground anchor beam 6.
Described road pavement 7 continuous laying is above girder 1 and attachment strap 5.
Further, supported by some bridge piers 2 below described girder 1, and should with described girder 1 consolidation from the nearest bridge pier 2 of described semi-integral bridge abutment 3, to increase the thrust stiffness of seamless end of the bridge.
After adopting said structure, because attachment strap 5 is linked together with girder 1 by main muscle 8, thus attachment strap 5 can be out of shape with girder 1, and attachment strap 5 also can be securely fixed in ground layer 11 by the ground anchor beam 6 that the far platform end of attachment strap 5 is arranged.Like this, when girder 1 extends because of expanded by heating, ground anchor beam 6 and attachment strap 5 will upwards withstand girder 1, make girder 1 only can to top, the slope Direction distortion of Ramp bridge, thus push up in the shrinkage joint at place by being out of shape to receive to slope; And when beam 1 stretches because catching a cold and shortens, the anchorage effect of ground anchor beam 6 and the deadweight component of girder 1 make the distortion of girder 1 only to direction at the bottom of slope, distortion can be received by the shrinkage joint on top, slope equally.Such structure, makes bottom, slope no longer produce distortion, therefore at the bottom of slope, can not arrange shrinkage joint by bridgehead position, thus reduces the quantity of bridge expanssion joint.And facts have proved, the jumping car that the shrinkage joint of bottom, slope produces and noise are greater than top, slope and flat slope place, and the shrinkage joint therefore eliminating bottom, slope will reduce maintenance cost and noise pollution greatly.
Moreover described main muscle 8 can be connected in aggregates with the superiors' reinforcing bar 9 in described attachment strap 5, to increase the bonding strength between girder 1 and attachment strap 5.
In addition, multiple monobloc cast with it ground anchor beam 6 together can be set, to increase the anchoring strength of attachment strap 5 below described attachment strap 5.
The above is only preferred embodiment of the present invention, not imposes any restrictions technical scope of the present invention, therefore the change in every case done according to claim of the present invention and manual or modification, all should belong within scope that patent of the present invention contains.
Claims (5)
1. the seamless Ramp bridge end of the bridge structure of a semi-monolithic formula, is characterized in that: comprise girder (1), semi-integral bridge abutment (3), attachment strap (5), anchor beam (6) and road pavement (7); This girder (1) is with abutment (3) for split constructs, and it is placed on the platform cap of abutment (3) by bearing (12), this abutment (3) is also provided with abutment parados (4); Near platform end and this girder (1) of this attachment strap (5) are linked together by main muscle (8), and the far platform end of this attachment strap (5) is provided with to water with it and builds up an overall described ground anchor beam (6), and this ground anchor beam (6) extend within ground layer (11); Be provided with at least one deck reinforcing bar in described attachment strap (5), and every layer of reinforcing bar all extends downward within described ground anchor beam (6); This road pavement (7) continuous laying is in girder (1) and attachment strap (5) top.
2. the seamless Ramp bridge end of the bridge structure of semi-monolithic formula according to claim 1, it is characterized in that: be provided with top reinforcement (9) and lower floor's reinforcing bar (10) two-layer reinforcing bar in described attachment strap (5), two-layer reinforcing bar all extends downward within described ground anchor beam (6).
3. the seamless Ramp bridge end of the bridge structure of semi-monolithic formula according to claim 1 and 2, is characterized in that: described main muscle (8) becomes an entirety with the superiors' bar connecting in described attachment strap (5).
4. the seamless Ramp bridge end of the bridge structure of semi-monolithic formula according to claim 1 and 2, is characterized in that: described attachment strap (5) below is provided with multiple monobloc cast with it ground anchor beam (6) together.
5. semi-monolithic formula according to claim 1 and 2 seamless Ramp bridge end of the bridge structure, is characterized in that: described girder (1) below is from the nearest bridge pier (2) of described abutment (3) and described girder (1) consolidation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510331482.3A CN104878687B (en) | 2015-06-16 | 2015-06-16 | Semi-monolithic formula is seamless, and Ramp bridge end of the bridge constructs |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510331482.3A CN104878687B (en) | 2015-06-16 | 2015-06-16 | Semi-monolithic formula is seamless, and Ramp bridge end of the bridge constructs |
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| CN104878687A true CN104878687A (en) | 2015-09-02 |
| CN104878687B CN104878687B (en) | 2016-06-15 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101440602A (en) * | 2008-12-19 | 2009-05-27 | 湖南大学 | Structure of continuously reinforced link road pavement for seamless bridge |
| CN102852086A (en) * | 2012-10-09 | 2013-01-02 | 福州大学 | High-performance semi-integral abutment structure and construction method thereof |
| CN103194964A (en) * | 2013-04-26 | 2013-07-10 | 福州大学 | Novel seamless bridge structure adopting swing beam and construction method for novel seamless bridge structure |
| JP5389293B1 (en) * | 2013-06-11 | 2014-01-15 | 株式会社ハナミズキ・ブリッジ・プランニング | Fixed structure |
| CN104652257A (en) * | 2015-02-09 | 2015-05-27 | 上海勘测设计研究院有限公司 | Jointless abutment structure |
| CN204728196U (en) * | 2015-06-16 | 2015-10-28 | 厦门理工学院 | Semi-monolithic formula is seamless, and Ramp bridge end of the bridge constructs |
-
2015
- 2015-06-16 CN CN201510331482.3A patent/CN104878687B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101440602A (en) * | 2008-12-19 | 2009-05-27 | 湖南大学 | Structure of continuously reinforced link road pavement for seamless bridge |
| CN102852086A (en) * | 2012-10-09 | 2013-01-02 | 福州大学 | High-performance semi-integral abutment structure and construction method thereof |
| CN103194964A (en) * | 2013-04-26 | 2013-07-10 | 福州大学 | Novel seamless bridge structure adopting swing beam and construction method for novel seamless bridge structure |
| JP5389293B1 (en) * | 2013-06-11 | 2014-01-15 | 株式会社ハナミズキ・ブリッジ・プランニング | Fixed structure |
| CN104652257A (en) * | 2015-02-09 | 2015-05-27 | 上海勘测设计研究院有限公司 | Jointless abutment structure |
| CN204728196U (en) * | 2015-06-16 | 2015-10-28 | 厦门理工学院 | Semi-monolithic formula is seamless, and Ramp bridge end of the bridge constructs |
Non-Patent Citations (1)
| Title |
|---|
| 金晓勤等: "新型半整体式无缝桥梁的研究", 《公路》 * |
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