CN103981802A - Structure and method for controlling jointless abutment back subsidence and pavement cracking by using reinforcement geotextile - Google Patents
Structure and method for controlling jointless abutment back subsidence and pavement cracking by using reinforcement geotextile Download PDFInfo
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- CN103981802A CN103981802A CN201410215377.9A CN201410215377A CN103981802A CN 103981802 A CN103981802 A CN 103981802A CN 201410215377 A CN201410215377 A CN 201410215377A CN 103981802 A CN103981802 A CN 103981802A
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Abstract
The invention relates to a structure and a method for controlling jointless abutment back subsidence and pavement cracking by using reinforcement geotextile. The bridge abutment of a jointless bridge is connected with an access board, backfill reinforced by multilayer reinforcement geotextile is arranged above the access board, backfill reinforced by multilayer reinforcement geotextile is also arranged under the access board, spacing is formed between the backfill reinforced by multilayer reinforcement geotextile and under the access board, and the wall body of the bridge abutment, an elastic material layer in the spacing is wrapped on the abutment back of the abutment, the wall body of the abutment is supported on a single rank of piles, the periphery of the single rank of piles is also wrapped by an elastic material layer, and the access board is obliquely arranged, and a discrete material layer is arranged at the tail end of the access board. With the reinforcement principle of the reinforcement geotextile and ingenious structural arrangement, a flexible structural layer with good overall integrity and higher rigidity is formed, so that the abutment back subsidence and pavement cracking of the jointless bridge are effectively controlled, the rigid-and-flexible stable transition of the road and bridge transition section is realized, and the structure and method are particularly applicable to jointless bridges with integral type abutments.
Description
Technical field
The present invention relates to reinforced geotextile and control structure and the method for sedimentation and pavement cracking after seamless abutment, be specially adapted to Integral Abutment seamless bridge, belong to bridge technology field.
Background technology
The usage quantity of seamless bridge constantly increases.The more traditional bridge of such bridge has more advantage, for example: seamless bridge abutment does not arrange the solution that (shrinkage joint and bearing) is any performance degradation of avoiding relevant with shrinkage joint, bearing, since cancelled shrinkage joint and bearing, so also with regard to not needing, they checked and are changed, having saved bridge life cycle cost.In order to cancel shrinkage joint, transition slab at bridge head is directly connected to the end of seamless bridge, therefore attachment strap is by the bridge deck displacement that is subject to due to temperature effect and concrete shrinkage, creeps and cause, its major effect is to make the soil body produce local distortion, and near causing transition slab at bridge head end, ground produces sedimentation, this sedimentation will affect ultimate service state, user's the comfortableness and increased maintenance cost because it has reduced the planeness of road pavement layer, soil and the interaction of structure are increased, and these factors are technical issues that need to address in seamless bridge evolution.
Especially in Integral Abutment seamless bridge, for fear of shrinkage joint is set, transition slab at bridge head is directly connected on Integral Abutment, therefore attachment strap will be subject to due to temperature effect and concrete shrinkage, the displacement of creeping and causing, its major effect is to make attachment strap end produce stress to concentrate, near causing attachment strap end, road surface produces sedimentation, thereby causes road cracking and vehicle bump at bridge ends occurs, thus the life-span of reducing road-ability and bridge.
Summary of the invention
In view of the deficiency of existing seamless beam bridge, technical problem to be solved by this invention is to provide a kind of structure and the method that reinforced geotextile is controlled sedimentation and pavement cracking after seamless abutment.
In order to solve the problems of the technologies described above, technical scheme one of the present invention is: a kind of reinforced geotextile is controlled the structure of sedimentation and pavement cracking after seamless abutment, the abutment of described seamless bridge is connected with attachment strap, described attachment strap top is provided with the backfill that multilayer reinforced geotextile is reinforced, the backfill top that described attachment strap top is reinforced by reinforced geotextile is provided with road surface, described attachment strap below is also provided with the backfill that some layers of reinforced geotextile are reinforced, between the backfill that described attachment strap below is reinforced by reinforced geotextile and abutment body of wall, leave spacing, described Abutment Back is coated with an elastomeric layer that is positioned at pitch space, described abutment body of wall is supported in single stake, described single stake is also enclosed with an elastomeric layer around, described attachment strap is obliquely installed and end is placed with a discrete material layer.
Further, described elastomeric layer is to be made by the thick low elastic modulus material of 20mm.
Further, the material of described elastomeric layer is expanded polystyrene (EPS).
Further, the geotextiles of described reinforced geotextile is to be applied and make through PVC by high strength polyester filament yarn, and its tensile strength is 70KN/M, and sizing grid is 35mm * 35mm.
Further, the geotextiles material of described reinforced geotextile is polypropylene, polyethylene, polyester, nylon or glass fiber.
Further, the reinforcement material of described reinforced geotextile is reinforcing bar, bamboo reinforcement, wicker, band steel band, steel band with ribbing, stainless steel belt or galvanized steel strip.
In order to solve the problems of the technologies described above, technical scheme two of the present invention is: a kind of reinforced geotextile is controlled the construction method of sedimentation and pavement cracking after seamless abutment, adopts above-mentioned structure, and carries out according to the following steps:
(1) first make single stake and abutment body of wall, then wrap up respectively an elastomeric layer around at Abutment Back and single stake;
(2) on the ground of compacting, lay successively the backfill that some layers of reinforced geotextile are reinforced, while laying every one deck, all use road roller compacting;
(3) first build tilting attachment strap, then lay a discrete material layer at attachment strap end;
(4) after the intensity that reaches expection until attachment strap, above attachment strap, lay successively the backfill that multilayer reinforced geotextile is reinforced, while laying every one deck, all use road roller compacting;
(5) build road surface.
Further, in step (3), described attachment strap with abutment is whole water together with.
Further, in step (5), described road surface adopts ductility fiber reinforced.
Compared with prior art, the present invention has following beneficial effect: the present invention utilizes the reinforcement principle of reinforced geotextile and structural configuration cleverly, formation good integrity, the flexible structure layer that rigidity is larger, thereby effectively control sedimentation and pavement cracking after the platform of seamless bridge, realized the hard and soft mild transition of road-bridge transition section.The reinforced geotextile of attachment strap of the present invention top is conducive to disperse and reduce the strain between the backfill soil body, thereby makes ground there will not be permanent crackle; The backfill that the reinforced geotextile of attachment strap below is reinforced carry on the back with platform between default elastomeric layer can significantly reduce gathering of soil pressure after platform; Single stake elastomeric layer around can provide enough lateral displacements, has reduced the restraint forces of superstructure, thus the sedimentation of the soil body after effective console.In addition, the present invention has that corrosion resistance is good, the strength of materials is high, cost is low, can effectively prevent the advantages such as soil body creep, is specially adapted to Integral Abutment seamless bridge.
Below in conjunction with the drawings and specific embodiments, the present invention will be further described in detail.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of the present invention.
Fig. 2 is the partial schematic diagram of the embodiment of the present invention.
Fig. 3 is the structural representation of reinforced geotextile.
In figure: 1-road surface, the backfill that the two-layer reinforced geotextile of 2-attachment strap top is reinforced, 3-discrete material layer, 4-attachment strap, the backfill that four layers of reinforced geotextile of 5-attachment strap below are reinforced, 6-elastomeric layer, the single stake of 7-, 8-abutment body of wall, 9-geotextiles, 10-reinforcement material, 11-Abutment Back.
The specific embodiment
As shown in Fig. 1 ~ 3, a kind of reinforced geotextile is controlled the structure of sedimentation and pavement cracking after seamless abutment, the abutment of described seamless bridge is connected with attachment strap 4, described attachment strap 4 tops are provided with the backfill 2 that two-layer reinforced geotextile is reinforced, backfill 2 tops that described attachment strap 4 tops are reinforced by two-layer reinforced geotextile are provided with road surface 1, described attachment strap 4 belows are also provided with the backfill 5 that four layers of reinforced geotextile are reinforced, between the backfill 5 that described attachment strap 4 belows are reinforced by four layers of reinforced geotextile and abutment body of wall 8, leave certain spacing, described Abutment Back 10 is coated with an elastomeric layer 6 that is positioned at pitch space, described abutment body of wall 8 is supported in single stake 7, described single stake 7 is also enclosed with an elastomeric layer 6 around, described attachment strap 4 is obliquely installed and end is placed with a discrete material layer 3.
In the present embodiment, in order to prevent, between backfill that reinforced geotextile reinforces and attachment strap 4, relative slippage occurs, the backfill that described attachment strap 4 top reinforced geotextiles are reinforced is fixed on attachment strap 4, can weld or be connected by the engaging lug default with reinforced geotextile of pre-buried connecting pin on attachment strap 4 with the reinforcing bar in reinforced geotextile by embedded bar on attachment strap 4, realize the fixing of itself and attachment strap 4.Described elastomeric layer 6 is to be made by the thick low elastic modulus material of 20mm, for example adopt this class material of expanded polystyrene (EPS) (EPS), be used for waterproof and provide distortion to reduce soil pressure, even in the situation that not activating passive earth pressure, bridge self still can bear 20% large deformation in thermal expansion process.The ductility fiber on described road surface 1 can adopt steel fibre.Described discrete material layer 3 can adopt the materials such as sand.
In the present embodiment, in order to increase the intensity of backfill, the present invention has adopted several layers of reinforced geotextile, the geotextiles of described reinforced geotextile is by high strength polyester filament yarn, through PVC, to be applied the net structure of making, its tensile strength is 70KN/M, sizing grid is 35mm * 35mm, and the reinforcement material of described reinforced geotextile is reinforcing bar, can effectively increase the frictional force between the soil body.Certainly, the geotextiles material of described reinforced geotextile also can adopt polypropylene, polyethylene, polyester, nylon or glass fiber etc., and the reinforcement material of described reinforced geotextile also can adopt bamboo reinforcement, wicker, band steel band, steel band with ribbing, stainless steel belt or galvanized steel strip etc.
As shown in Fig. 1 ~ 3, a kind of reinforced geotextile is controlled the construction method of sedimentation and pavement cracking after seamless abutment, adopts above-mentioned structure, and carries out according to the following steps:
(1) first make single stake 7 and abutment body of wall 8, then wrap up respectively an elastomeric layer 6 around at Abutment Back 10 and single stake 7;
(2) on the ground of compacting, lay successively the backfill 5 that four layers of reinforced geotextile are reinforced, while laying every one deck, all use road roller compacting;
(3) first build tilting attachment strap 4, then lay a discrete material layer 3 at attachment strap 4 ends;
(4) after the intensity that reaches expection until attachment strap 4, above attachment strap 4, lay successively the backfill 2 that two-layer reinforced geotextile is reinforced, while laying every one deck, all use road roller compacting;
(5) build road surface 1.
In step (1), described Abutment Back 10 and single stake 7 be default elastomeric layer 6 around, can effectively reduce the restraint forces of superstructure.
In step (2), the backfill 5 that four layers of reinforced geotextile of described attachment strap 4 belows are reinforced from the bottom up length is consistent, and maintain a certain distance with Abutment Back 10, this design can reduce gathering of soil pressure after platform, and has avoided the settlement issues that cannot this part backfill soil body of compacting produces due to narrow space when Abutment Back 10 construction due to compacting machine.Certainly, according to actual the thickness of the layer, the present invention can also arrange the backfill 5 that more multi-layered reinforced geotextile is reinforced.
In step (3), described attachment strap 4 can with abutment is whole water together with, described road surface 1 also with abutment is whole water together with.
In step (4), the length of the backfill 2 that the two-layer reinforced geotextile of described attachment strap 4 tops is reinforced should be greater than the area of stress concentration of attachment strap 4 ends, thus the strain between dispersion and the minimizing backfill soil body.
In step (5), described road surface 1 adopts ductility fiber reinforced, and the road surface 1 of transition region adopts ductility fibre reinforced concrete to build, and described ductility fiber can adopt steel fibre.
The foregoing is only preferred embodiment of the present invention, all equalizations of doing according to the present patent application the scope of the claims change and modify, and all should belong to covering scope of the present invention.
Claims (10)
1. a reinforced geotextile is controlled the structure of sedimentation and pavement cracking after seamless abutment, the abutment of described seamless bridge is connected with attachment strap, it is characterized in that: described attachment strap top is provided with the backfill that multilayer reinforced geotextile is reinforced, the backfill top that described attachment strap top is reinforced by reinforced geotextile is provided with road surface, described attachment strap below is also provided with the backfill that some layers of reinforced geotextile are reinforced, between the backfill that described attachment strap below is reinforced by reinforced geotextile and abutment body of wall, leave spacing, described Abutment Back is coated with an elastomeric layer that is positioned at pitch space, described abutment body of wall is supported in single stake, described single stake is also enclosed with an elastomeric layer around, described attachment strap is obliquely installed and end is placed with a discrete material layer.
2. reinforced geotextile according to claim 1 is controlled the structure of sedimentation and pavement cracking after seamless abutment, it is characterized in that: described elastomeric layer is to be made by the thick low elastic modulus material of 20mm.
3. reinforced geotextile according to claim 1 and 2 is controlled the structure of sedimentation and pavement cracking after seamless abutment, it is characterized in that: the material of described elastomeric layer is expanded polystyrene (EPS).
4. reinforced geotextile according to claim 1 is controlled the structure of sedimentation and pavement cracking after seamless abutment, it is characterized in that: the geotextiles of described reinforced geotextile is to be applied and make through PVC by high strength polyester filament yarn, its tensile strength is 70KN/M, and sizing grid is 35mm * 35mm.
5. reinforced geotextile according to claim 1 is controlled the structure of sedimentation and pavement cracking after seamless abutment, it is characterized in that: the geotextiles material of described reinforced geotextile is polypropylene, polyethylene, polyester, nylon or glass fiber.
6. according to the reinforced geotextile described in claim 1,4 or 5, control the structure of sedimentation and pavement cracking after seamless abutment, it is characterized in that: the reinforcement material of described reinforced geotextile is reinforcing bar, bamboo reinforcement, wicker, band steel band, steel band with ribbing, stainless steel belt or galvanized steel strip.
7. reinforced geotextile according to claim 1 is controlled the structure of sedimentation and pavement cracking after seamless abutment, it is characterized in that: described road surface adopts ductility fiber reinforced.
8. reinforced geotextile is controlled a construction method for sedimentation and pavement cracking after seamless abutment, it is characterized in that, adopts any reinforced geotextile in claim 1 to 6 to control the structure of sedimentation and pavement cracking after seamless abutment, and carries out according to the following steps:
(1) first make single stake and abutment body of wall, then wrap up respectively an elastomeric layer around at Abutment Back and single stake;
(2) on the ground of compacting, lay successively the backfill that some layers of reinforced geotextile are reinforced, while laying every one deck, all use road roller compacting;
(3) first build tilting attachment strap, then lay a discrete material layer at attachment strap end;
(4) after the intensity that reaches expection until attachment strap, above attachment strap, lay successively the backfill that multilayer reinforced geotextile is reinforced, while laying every one deck, all use road roller compacting;
(5) build road surface.
9. reinforced geotextile according to claim 8 is controlled the construction method of sedimentation and pavement cracking after seamless abutment, it is characterized in that: in step (3), described attachment strap with abutment is whole water together with.
10. reinforced geotextile according to claim 8 is controlled the construction method of sedimentation and pavement cracking after seamless abutment, it is characterized in that: in step (5), described road surface adopts ductility fiber reinforced.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410215377.9A CN103981802B (en) | 2014-05-21 | 2014-05-21 | Reinforced geotextile controls structure and the method for sedimentation and pavement cracking after seamless abutment |
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| CN201410215377.9A CN103981802B (en) | 2014-05-21 | 2014-05-21 | Reinforced geotextile controls structure and the method for sedimentation and pavement cracking after seamless abutment |
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| CN103981802A true CN103981802A (en) | 2014-08-13 |
| CN103981802B CN103981802B (en) | 2016-03-30 |
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Cited By (9)
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| CN104452578A (en) * | 2014-12-17 | 2015-03-25 | 福州大学 | Seismic-resistant integral abutment bridge with energy absorption materials embedded in pier tops and construction method of seismic-resistant integral abutment bridge |
| CN104499425A (en) * | 2014-12-24 | 2015-04-08 | 福州大学 | Structure and construction process for reducing power impact response at back of seamless bridge abutment |
| CN104594185A (en) * | 2014-12-17 | 2015-05-06 | 福州大学 | Semi-integrated type bridge abutment bridge with multiple portions embedded with energy absorption materials and construction method thereof |
| CN104652256A (en) * | 2014-12-24 | 2015-05-27 | 福州大学 | Seamless bridge abutment structure capable of improving lateral anti-seismic performance |
| CN106638277A (en) * | 2017-02-14 | 2017-05-10 | 上海市城市建设设计研究总院（集团）有限公司 | Expansible bridge abutment approach slab structure |
| CN106638291A (en) * | 2017-02-14 | 2017-05-10 | 上海市城市建设设计研究总院（集团）有限公司 | Structure of arc-shaped lap-joint slab capable of reducing bridge circulation control joint swelling and shrinking |
| CN106758782A (en) * | 2017-02-14 | 2017-05-31 | 上海市城市建设设计研究总院（集团）有限公司 | The construction of bridge hazard to bridge's pier end horizontal active force can be reduced |
| CN112176853A (en) * | 2020-11-04 | 2021-01-05 | 武汉大学 | Pile-supported damping reinforced earth abutment and construction method thereof |
| CN112376448A (en) * | 2020-11-24 | 2021-02-19 | 天津市公路工程总公司 | Bridge repairing and maintaining structure and construction method thereof |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104452578A (en) * | 2014-12-17 | 2015-03-25 | 福州大学 | Seismic-resistant integral abutment bridge with energy absorption materials embedded in pier tops and construction method of seismic-resistant integral abutment bridge |
| CN104594185A (en) * | 2014-12-17 | 2015-05-06 | 福州大学 | Semi-integrated type bridge abutment bridge with multiple portions embedded with energy absorption materials and construction method thereof |
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| CN104499425A (en) * | 2014-12-24 | 2015-04-08 | 福州大学 | Structure and construction process for reducing power impact response at back of seamless bridge abutment |
| CN104652256A (en) * | 2014-12-24 | 2015-05-27 | 福州大学 | Seamless bridge abutment structure capable of improving lateral anti-seismic performance |
| CN106638277A (en) * | 2017-02-14 | 2017-05-10 | 上海市城市建设设计研究总院（集团）有限公司 | Expansible bridge abutment approach slab structure |
| CN106638291A (en) * | 2017-02-14 | 2017-05-10 | 上海市城市建设设计研究总院（集团）有限公司 | Structure of arc-shaped lap-joint slab capable of reducing bridge circulation control joint swelling and shrinking |
| CN106758782A (en) * | 2017-02-14 | 2017-05-31 | 上海市城市建设设计研究总院（集团）有限公司 | The construction of bridge hazard to bridge's pier end horizontal active force can be reduced |
| CN106758782B (en) * | 2017-02-14 | 2021-05-11 | 上海市城市建设设计研究总院（集团）有限公司 | Structure capable of reducing horizontal acting force at end part of bridge abutment butt strap |
| CN106638291B (en) * | 2017-02-14 | 2021-08-31 | 上海市城市建设设计研究总院（集团）有限公司 | Arc-shaped lapping plate structure capable of reducing expansion and contraction amount of bridge circulation control joint |
| CN112176853A (en) * | 2020-11-04 | 2021-01-05 | 武汉大学 | Pile-supported damping reinforced earth abutment and construction method thereof |
| CN112376448A (en) * | 2020-11-24 | 2021-02-19 | 天津市公路工程总公司 | Bridge repairing and maintaining structure and construction method thereof |
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