CN102041759B - Transition roadway for managing bumping at bridge-head - Google Patents
Transition roadway for managing bumping at bridge-head Download PDFInfo
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- CN102041759B CN102041759B CN2010105603647A CN201010560364A CN102041759B CN 102041759 B CN102041759 B CN 102041759B CN 2010105603647 A CN2010105603647 A CN 2010105603647A CN 201010560364 A CN201010560364 A CN 201010560364A CN 102041759 B CN102041759 B CN 102041759B
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- reinforced concrete
- concrete hollow
- bridge
- hollow slab
- bumping
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Abstract
The invention discloses a transition roadway for managing bumping at bridge-head, which is characterized in that one end of each reinforced concrete hollow slab of which the width is same as that of the roadway is embedded into an abutment with fixed reinforcing steel bars, and the reinforced concrete hollow slabs at the positions at which the fixed reinforcing steel bars locate are buried below a bed course; the other ends of the reinforced concrete hollow slabs are arranged on end strutting pieces closing to the original embankment, so that the reinforced concrete hollow slabs are obliquely arranged between the abutment and the end strutting pieces to form a transition roadway; and stiffness of the reinforced concrete hollow slabs is consistent with that of the abutment. The transition roadway provided by the invention is used, so that settlement and abrupt change of the road surface nearby the bridge head are not caused by continuous settlement, thus fundamentally solving the problem of bumping at bridge-head resulting from the settlement and abrupt change of the road surface.
Description
Technical field
The present invention relates to a kind of transition road structure that is used to administer the bumping at bridge-head phenomenon.
Background technology
Bumping at bridge-head is to produce a kind of phenomenon that bigger settlement difference causes that vehicle ' is jolted too greatly because of rigidity between abutment and the roadbed differs.Bumping at bridge-head has a strong impact on travel safety, comfortableness, and the shock loading of jumping the car generation simultaneously produces very adverse influence to abutment.Slowing down that bumping at bridge-head improves traveling security, comfortableness is a difficult problem of puzzlement engineering circle always, also is one of problem of needing badly in the highway engineering construction solution.Lot of domestic and international scholar has carried out big quantity research to mechanism and solution that the bumping at bridge-head phenomenon produces, and proposes some control measures.The measure that the segmentation that the patent of invention " variable rigidity treatment system of vehicle jumping at bridge head of highway " that the yellow luxuriant pine of existing treatment measures such as university of Tongji University etc. proposes adopts improves subgrade stiffness; The measure of the raising changeover portion subgrade stiffness that the utility model patent " pillar-shaped bridge soft patch " that the Xie Yongli of Chang An University etc. propose adopts etc.; These treatment measures are launched around improving roadbed part rigidity or intensity basically; Though make the excessive problem of end of the bridge settlement after construction obtain solving definitely; But handling the highway section and be untreated the highway section joining place, producing new sedimentation sudden change again, producing " secondary is jumped car ".Therefore problem of bumping at bridge-head is not solved so far completely, and especially bumping at bridge-head happens occasionally on speedway, has a strong impact on the application life of traffic safety and road.
Summary of the invention
The present invention is for avoiding above-mentioned existing in prior technology weak point; A kind of transition roadbed of administering bumping at bridge-head is provided; Make near the road surface continuous sedimentation of end of the bridge and can not produce the sedimentation sudden change, fundamentally solve the problem that causes bumping at bridge-head because of the roadbed subsidence sudden change.
Technical solution problem of the present invention adopts following technical scheme:
The transition subgrade structure characteristics that the present invention administers bumping at bridge-head be an end of reinforced concrete hollow slab that width is identical with width of subgrade with in the fixing reinforcing bar implantation abutment, fixedly the reinforced concrete hollow slab of reinforcing bar position is embedded under the bed course; The other end of said reinforced concrete hollow slab places on the end supports near former embankment position; Said reinforced concrete hollow slab is place obliquely to form the changeover portion roadbed between abutment and the end supports, the rigidity of rigidity and abutment that reinforced concrete hollow slab is set is consistent.
The transition subgrade structure characteristics that the present invention administers bumping at bridge-head also are:
The upper surface of said armored concrete slab is along being set to ladder on the incline direction of reinforced concrete hollow slab; The surface of each step is that the gradient is the slope table top of 1-5% in the said ladder, and the incline direction of said slope table top is opposite with the incline direction of reinforced concrete hollow slab.
For the reinforced concrete hollow slab of span above 5m, at the span centre position of said reinforced concrete hollow slab support member is set, the material of said middle part support member can be selected plain concrete or cement stabilized macadam for use.
Compared with present technology, beneficial effect of the present invention is embodied in:
1, the present invention is that the reinforcement placing concrete core unit forms the changeover portion roadbed between abutment is extremely than distant place roadbed section; It is consistent that the rigidity of changeover portion roadbed is enhanced to abutment rigidity gradually by normal roadbed; Thereby the deformation that makes this changeover portion roadbed is tending towards relaxing, and " the secondary jumping car " that traditional control measures brings can not appear thus prevent the generation of bumping at bridge-head effectively.
2, the upper surface of reinforced concrete hollow slab is set to ladder among the present invention, and the effectively fixing roadbed of setting of ledge surface slope in the ladder, prevents the roadbed slippage of banketing.
Description of drawings
Fig. 1 is a transition roadbed segment structure sketch map of the present invention;
Fig. 2 also is the A portion enlarged diagram of Fig. 1 for the local enlarged diagram of reinforced concrete hollow slab of the present invention;
Fig. 3 is a transition roadbed section stiffness variation sketch map of the present invention;
Fig. 4 changes sketch map for foundation settlement before the abutment of the present invention.
Label among the figure: Bridge 1 platform, 2 backfill, 3 reinforced concrete hollow slabs, 4 are reinforcing bar, 5 bed courses, 6 former embankments, 7 supercrusts, 8 former roadbeds, 9 pile foundations, 10 bridge piers, 11 end supports, 12 middle part support members, 13 reinforcements fixedly.
The specific embodiment
In the present embodiment, shown in Figure 1, bridge includes pile foundation 9, bridge pier 10 and abutment 1; The transition highway section includes road surface, reinforced concrete hollow slab 3 and backfill 2; The road surface is divided into supercrust 7, bed course 5 and former roadbed 8.
Referring to Fig. 1, present embodiment be an end of reinforced concrete hollow slab 3 that width is identical with width of subgrade with in the fixing reinforcing bar 4 implantation abutments 1, fixedly the reinforced concrete hollow slab 3 of reinforcing bar 4 positions is embedded under the bed course 5; The other end of reinforced concrete hollow slab 3 places on the end supports 11 near former embankment 6 positions; Reinforced concrete hollow slab 3 is place obliquely to form the changeover portion roadbed between abutment 1 and the end supports 11, it is consistent or be close that the rigidity of rigidity and abutment 1 of reinforced concrete hollow slab 3 is set.
In the practical implementation; As shown in Figure 2; The upper surface that armored concrete slab is set is along being set to ladder on the incline direction of reinforced concrete hollow slab; The surface of each step is that the gradient is the slope table top of 1-5% in the ladder, and the incline direction of slope table top is opposite with the incline direction of reinforced concrete hollow slab, and this structure can effectively prevent the slippage along the hollowcore slab tangential that causes owing to foundation settlement.
For the reinforced concrete hollow slab 3 of span above 5m, middle part support member 12 is set at the span centre position of reinforced concrete hollow slab 3, the material of middle part support member 12 can be selected plain concrete or cement stabilized macadam for use.
In end supports 11 bottoms reinforcement 13 is set, fills rubble in the reinforcement 13, grit improves this part rigidity, make that rigidity realizes that continous-stable changes, and has avoided the generation of " secondary jumping car " phenomenon between transition roadbed and the former roadbed.
Reinforced concrete hollow slab 3 according to engineering is actual can cast-in-site or prefabricated.
When the span of reinforced concrete hollow slab 3 surpasses 5 meters, need set up support member 12 at the span centre position of reinforced concrete hollow slab 3, the material of support member 12 can be selected plain concrete or cement stabilized macadam for use.
Inclined type is placed the unfavorable sedimentation that method mainly is employing rigidity and abutment steel concrete swash plate 3 consistent or that be close comes even transition end of the bridge highway section that reinforced concrete hollow slab 3 is handled bumping at bridge-head in the present embodiment.
Shown in Fig. 3 stiffness curve and Fig. 4 subsidence curve, the rigidity of the rigidity of abutment 1 and former roadbed 8 differs too big.Curve a adopts reinforced concrete hollow slab 3 rigidity and subsidence curve afterwards among the figure, and curve b changes for part and bankets, and the technological means of raising roadbed part rigidity such as geo-grid sheet and intensity is handled rigidity and the subsidence curve behind the bumping at bridge-head.Both contrasts can be found out with technical scheme of the present invention and adopt the stiffness curve after the reinforced concrete hollow slab 3 to be steady decline until subgrade stiffness; Make the sedimentation of end of the bridge highway section ground change continuously; Can not produce the sedimentation sudden change at changeover portion; And the foundation strength that adopts original technical method can strengthen changeover portion makes rigidity and subsidence curve vary stable, and the bigger variation that the joining place in the processing section and the highway section of being untreated can produce rigidity, the settling amount here also sharply increases; Can produce the phenomenon of " secondary jumping car ", contrast can find out that technical scheme of the present invention can effectively prevent the generation of bumping at bridge-head phenomenon.
Claims (3)
1. transition roadbed of administering bumping at bridge-head; An end that it is characterized in that the reinforced concrete hollow slab that width is identical with width of subgrade (3) is with in fixing reinforcing bar (4) the implantation abutment (1), and fixedly the reinforced concrete hollow slab (3) of reinforcing bar (4) position is embedded under the bed course (5); The other end of said reinforced concrete hollow slab (3) places on the end supports (11) near former embankment (6) position; Said reinforced concrete hollow slab (3) is place obliquely to form the changeover portion roadbed between abutment (1) and the end supports (11), the rigidity of rigidity and abutment (1) that reinforced concrete hollow slab (3) is set is consistent.
2. the transition roadbed of improvement bumping at bridge-head according to claim 1; The upper surface that it is characterized in that said armored concrete slab (3) is along being set to ladder on the incline direction of reinforced concrete hollow slab; The surface of each step is that the gradient is the slope table top of 1-5% in the said ladder, and the incline direction of said slope table top is opposite with the incline direction of reinforced concrete hollow slab.
3. the transition roadbed of improvement bumping at bridge-head according to claim 1; It is characterized in that surpassing the reinforced concrete hollow slab (3) of 5m for span; At the span centre position of said reinforced concrete hollow slab (3) support member (12) is set, the material of said middle part support member (12) can be selected plain concrete or cement stabilized macadam for use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105603647A CN102041759B (en) | 2010-11-26 | 2010-11-26 | Transition roadway for managing bumping at bridge-head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105603647A CN102041759B (en) | 2010-11-26 | 2010-11-26 | Transition roadway for managing bumping at bridge-head |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102041759A CN102041759A (en) | 2011-05-04 |
| CN102041759B true CN102041759B (en) | 2012-06-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010105603647A Expired - Fee Related CN102041759B (en) | 2010-11-26 | 2010-11-26 | Transition roadway for managing bumping at bridge-head |
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| CN (1) | CN102041759B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102979021B (en) * | 2012-11-21 | 2015-04-08 | 邢台路桥建设总公司 | Construction method for treating vehicle jump at bridge head in highway |
| CN103952957B (en) * | 2014-04-15 | 2016-02-10 | 浙江大学宁波理工学院 | Can the roadbase structure of solving problem of vehicle bump at bridge head |
| CN106192724B (en) * | 2016-07-21 | 2018-01-12 | 桂林理工大学 | A kind of attachment structure for being used to handle the abutment and roadbed of problem of bumping at bridge-head |
| CN106284053A (en) * | 2016-08-06 | 2017-01-04 | 桂林理工大学 | A kind of road and bridge attachment structure effectively slowing down bumping at bridge-head |
| CN106676993B (en) * | 2017-01-20 | 2023-03-31 | 山西省交通科学研究院 | Reinforced broken stone frame structure roadbed reinforcing system and reinforcing method thereof |
| CN114575209B (en) * | 2022-03-31 | 2024-09-13 | 浙江数智交院科技股份有限公司 | Road rigid pile and preloading soft foundation treatment transition structure and construction method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2533153Y (en) * | 2002-03-20 | 2003-01-29 | 宁波市城市建设设计院 | Bridge approach capable of preventing car from skipping |
| CN2622245Y (en) * | 2003-05-09 | 2004-06-30 | 华南理工大学 | Bridge end chain type transitional means |
| CN2627054Y (en) * | 2003-05-30 | 2004-07-21 | 长安大学 | Rib form abutment soft patch |
| CN2828124Y (en) * | 2005-11-22 | 2006-10-18 | 游洪臣 | Installation for preventing differential settlement of road |
| CN201924249U (en) * | 2010-11-26 | 2011-08-10 | 合肥工业大学科教开发部 | Transition roadbed for dealing with vehicle bump |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000087356A (en) * | 1998-09-10 | 2000-03-28 | Sekisui Chem Co Ltd | Stabilizing method for soil structure on soft ground |
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2010
- 2010-11-26 CN CN2010105603647A patent/CN102041759B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2533153Y (en) * | 2002-03-20 | 2003-01-29 | 宁波市城市建设设计院 | Bridge approach capable of preventing car from skipping |
| CN2622245Y (en) * | 2003-05-09 | 2004-06-30 | 华南理工大学 | Bridge end chain type transitional means |
| CN2627054Y (en) * | 2003-05-30 | 2004-07-21 | 长安大学 | Rib form abutment soft patch |
| CN2828124Y (en) * | 2005-11-22 | 2006-10-18 | 游洪臣 | Installation for preventing differential settlement of road |
| CN201924249U (en) * | 2010-11-26 | 2011-08-10 | 合肥工业大学科教开发部 | Transition roadbed for dealing with vehicle bump |
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| Publication number | Publication date |
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| CN102041759A (en) | 2011-05-04 |
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Granted publication date: 20120613 Termination date: 20161126 |