CN102839595B - Method for treating bump at bridge-head - Google Patents
Method for treating bump at bridge-head Download PDFInfo
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- CN102839595B CN102839595B CN201210366600.0A CN201210366600A CN102839595B CN 102839595 B CN102839595 B CN 102839595B CN 201210366600 A CN201210366600 A CN 201210366600A CN 102839595 B CN102839595 B CN 102839595B
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- shrinkage joint
- paving
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- concrete
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Abstract
The invention discloses a method for treating bump at bridge-head. The method comprises the steps of road handling, expansion joints handling, asphalt filling and paving, expansion joints excavation and expansion joints recovery. According to the method for treating bump at bridge-head, with the adoption of novel anti-excavation technique, the paving and rolling compaction conditions of asphalt concrete close to the expansion joints are improved through road compaction and secondary excavation and recovery of the expansion joints, the compaction degree can be ensured, the height difference caused by secondary compaction of vehicle action can be reduced, and therefore, the condition of bump at bridge-head can be effectively improved.
Description
Technical field
The invention belongs to highway maintenance technology, be specifically related to a kind of method that adopts anti-excavation technology punishment bumping at bridge-head.
Background technology
Highway communication is occupied extremely important status in national economy and people's lives, is the important symbol of weighing a national economic strength and modernization level.Along with improving constantly of road quality classification, the shared proportion of the Highway Structural Materials such as bridge, culvert is increasing.According to statistics, only bridges and culverts, on average approximately 3/kilometer of high-grade highways.But from the high-grade highway operation situation having come into operation at present, exist some to enter not to the utmost people's will part, be especially embodied in the phenomenon of these structure back filling behind abutment place ubiquities " bumping at bridge-head ".So-called " bumping at bridge-head ", refers to that bridge structure thing and platform back of the body road structure, because sedimentation differs, cause the vehicle of running at high speed to be carried on the back with shrinkage joint place and produced the phenomenon of jolting and jumping by platform.Bumping at bridge-head is one of disease common in current highway maintenance, have a strong impact on road-ability, having reduced the travel speed of vehicle and the traffic capacity of road, is one of important hidden danger of traffic safety, has damaged the Social benefit and economic benefit of high-grade highway construction.
In general, bumping at bridge-head sinks mainly due to platform back of the body subgrade soil and pavement asphalt mixture secondary compaction causes.For operation process Zhong highway, the sedimentation of Bridgehead by Blastig soil tends towards stability substantially, therefore the subject matter facing in highway maintenance process is how to improve the compacting condition of end of the bridge asphalt concrete pavement, the settling amount that elimination or minimizing cause due to distortion under traffic effect after punishment.For this type of situation, existing bumping at bridge-head punishment common practices mainly comprises two kinds: one is that milling heavily spreads along connecing, be that near the asphalt concrete pavement of vehicle bridge head is jumped in milling, then heavily spread new bituminous concrete, make it to flush with deck expansion joint position along connecing, reduce to eliminate the discrepancy in elevation between shrinkage joint and road surface; It two is the shrinkage joint of reforming, and cuts whole shrinkage joint according to the absolute altitude of end of the bridge asphalt concrete pavement, again performs.
Produce principle from bumping at bridge-head, there is following drawback in above way: 1, heavily spreads along fetching for milling, because shrinkage joint is concrete structure, can not obtain good compacting with the bituminous mixture of its connecting position, after the compacting of hot-short driving process medium pitch concrete secondary, again produce the discrepancy in elevation.Therefore, the method can not solve the compaction problems of position, shrinkage joint bituminous mixture at all, and with shrinkage joint connecting position bituminous mixture conventionally because compacting is inadequate, under later stage vehicle repeat function, the new diseases such as further generation is loose, peel off, thus rideability and security performance affected; 2, for the shrinkage joint of reforming, because needs all cut shrinkage joint, and its construction technology is comparatively complicated, and construction period is longer, traffic is disturbed large, while is due to the feature of shrinkage joint construction technology, it unavoidably can cause certain loss to the structural performance of end of the bridge structure in transformation process, also can bring in addition new jumping car problem, i.e. the difference of shrinkage joint absolute altitude and deck paving absolute altitude, in addition, again perform the economy of shrinkage joint technical scheme poor.In conjunction with existing case history and effect thereof, the bumping at bridge-head carrying out in the manner described above punishment effect is very limited, and durability is not strong.
Along with the continuous sternness of highway maintenance situation, people improve constantly the requirement of road running comfortableness and safety in addition, improve, effect a radical cure highway bridgehead vehicle jump disease and become one of key task of Current Highway maintenance.Therefore, how effectively to eliminate bumping at bridge-head maybe by jumping the minimum level of car minimizing, become problem demanding prompt solution in highway maintenance.
Summary of the invention
The object of the invention is to overcome the deficiency of above-mentioned prior art, from the basic reason of Bridgehead-Jumping Disease generation, provides the Bridgehead-Jumping Disease Treatment Methods of a kind of functional performance excellence, better economy.
In order to achieve the above object, the invention provides a kind of Treatment Methods of bumping at bridge-head, comprise the following steps:
(1) treatment of road surfaces: milling end of the bridge place asphalt concrete pavement;
(2) shrinkage joint process: cut with road surface join end shrinkage joint; The described degree of depth that cuts is 4～5cm, and identical with the milling degree of depth on road surface in step (1);
(3) pitch is filled out paving: get bituminous concrete and fill out the road surface after milling in paving step (1), and extend the position, shrinkage joint spreading to after cutting in step (2); Then carry out spreading repeatedly to filling out the concrete road surface of black top and shrinkage joint;
(4) shrinkage joint excavation: shrinkage joint place in step (3) is filled out to the bituminous concrete excision of paving, and continued to cut shrinkage joint downwards along this excision face; The degree of depth at the described shrinkage joint place of cutting is 7～12cm;
(5) recover at shrinkage joint: the shrinkage joint that heavily spreads excavation in step (4); Shrinkage joint after described heavy paving flushes with asphalt concrete pavement and deck paving after spreading in step (3).
Wherein, adopt milling machine laterally to cut shrinkage joint in step (2), cutting width is 25cm.
Step (3) is carried out bituminous concrete and is filled out before paving, at the face that cuts pad one deck fine grained sand or the gunnysack at shrinkage joint.Specifically realized by following technical scheme:
In step (4), the place of cutting at shrinkage joint is skewed slot shape, is 12cm near one end degree of depth of described asphalt concrete pavement, and the other end degree of depth is 7cm.
In step (5), the heavily paving process at shrinkage joint is as follows:
A, bar planting: in the concrete at the middle shrinkage joint of described step (4) place of cutting, implant screw-thread steel,
B, epoxy resin apply: after bar planting, and the face that cuts at cleaning shrinkage joint, and on face, smear epoxy resin cutting;
C, steel mesh reinforcement are laid: in the groove forming at the place of cutting, lay steel mesh reinforcement;
D, again build: finally get C40 concrete and again build shrinkage joint.
The present invention has the following advantages compared to existing technology: the present invention adopts anti-excavation novel process, by the compacting of road pavement and the secondary excavation reparation at shrinkage joint, that has improved near bituminous concrete shrinkage joint paves, rolls condition, can ensure its degree of compaction, reduce the discrepancy in elevation that vehicle effect secondary compaction causes, and then effectively improve bumping at bridge-head situation.And the present invention heavily spreads road-surface milling and reforms with shrinkage joint that both combine, only need to carry out part to the shrinkage joint of shortcut face portion and cut, reduce cost, and there is good functional performance.Bridgehead-Jumping Disease punishment technology provided by the invention can better be improved highway bridge bumping at bridge-head situation, ensures Vehicle Driving Cycle comfortableness and safety.
Brief description of the drawings
Fig. 1 is end of the bridge shrinkage joint and road structure schematic diagram before bumping at bridge-head punishment;
Fig. 2 is that asphalt concrete pavement and shrinkage joint milling cut schematic diagram;
Fig. 3 is that bituminous concrete paves, rolls scope schematic diagram;
Fig. 4 is the anti-schematic diagram that excavates in shrinkage joint;
Fig. 5 is that schematic diagram is recovered at shrinkage joint.
In figure, 1-end of the bridge asphalt concrete pavement, 2-shrinkage joint, 3-shrinkage joint shaped steel, 4-shrinkage joint milling scope, 5-flexible pavement milling scope, 6-particulate layer of sand, the new asphalt concrete structure of 7-, 8-epoxy resin layer, 9-indented bars, 10-C40 cement concrete layer, 11-steel mesh reinforcement.
Detailed description of the invention
Below in conjunction with concrete implementing process, the present invention is described in detail:
1, preparation of construction
Ground surface material: bituminous concrete, C40 concrete, early strength admixture, fine grained sand (or gunnysack), epoxy resin, indented bars (diameter 16mm), steel mesh reinforcement (diameter 10mm, spacing 10cm);
Plant and instrument: milling machine, pneumatic pick, paver, steel roller, forest fire extinguisher.
, treatment of road surfaces (milling of end of the bridge asphalt concrete pavement)
According to road gradient requirement, adopt milling machine to carry out milling to end of the bridge asphalt concrete pavement 1.For ensureing the bituminous mixture laying scope of operation, the length of road-surface milling scope 5 should not be less than 20m.
, shrinkage joint punishes in advance
Adopt milling machine to carry out horizontal milling to shrinkage joint 2, width 25cm, the degree of depth 5cm of shrinkage joint milling scope 4, apart from the about 20cm of distance of shrinkage joint shaped steel 3.As milling face does not meet the demands, should continue to adopt pneumatic pick to carry out artificial chisel and remove;
Utilize forest fire extinguisher that milling (cutting) face is cleaned out;
Before bituminous concrete paves, at the shrinkage joint of milling (cutting), position pad a layer thickness is 1cm left and right particulate layer of sand 6, also can utilize gunnysack when condition does not meet, to ensure that this region is convenient to cutting and removes paving after bituminous concrete.
, bituminous mixture laying and rolling
Get bituminous concrete and fill out milling scope 5 places that pave, and pave to shrinkage joint milling scope 4 places;
Adopt steel roller to roll for the bituminous concrete paving, should repeatedly roll near the end of the bridge asphalt concrete pavement 1 position, end of the bridge shrinkage joint, ensure that its degree of compaction can reach normal section level and requirement, finally form new asphalt concrete structure 7.
, shrinkage joint is counter excavates
After bituminous concrete decking and rolling completes, the bituminous concrete at new asphalt concrete structure 7 places is removed in shrinkage joint milling scope 4 internal cuttings;
Adopt forest fire extinguisher that the sand cushion cutting on face is cleaned clean;
The cut face original along shrinkage joint continues to cut shrinkage joint, and the about 2cm of the degree of depth that deck paving end continues to cut builds in order to improve the follow-up cement concrete of end of the bridge section simultaneously, vibrates, the quality such as health, and end of the bridge end cuts the about 7cm of the degree of depth.
, shrinkage joint recover
Shrinkage joint cement concrete after cutting is carried out to bar planting, and bar planting adopts the indented bars 9 of diameter 16mm;
After bar planting, adopt forest fire extinguisher cleaning is cut to face to clean out, and smear epoxy resin cutting on face, form epoxy resin layer 8, to strengthen the bonding between new-old concrete;
Cutting after cleaning laid steel mesh reinforcement 11(bar diameter 10mm, longitudinal and transverse spacing 10cm steel mesh reinforcement on face), recover the structural strength at shrinkage joint;
Again build the C40 concrete (meeting the engineering universal standard) containing early strength admixture, form surperficial C40 layer of concrete 10, before cement concrete initial set, guarantee that the cement concrete of again building is connected smooth-going with road surface, bridge floor.
, open to traffic
By clean construction area cleaning, form rear open to traffic until cement concrete health (72h) intensity.
, quality acceptance standard
Bumping at bridge-head punishment technical quality is carried out an acceptance inspection, and result is as shown in table 1 below.
Table 1 construction quality inspection result
As can be seen from the above table, after punishing by the present invention, through using after a while, asphalt concrete pavement, substantially without secondary compaction, flushes with shrinkage joint, and bumping at bridge-head situation has obtained obvious improvement.The Bridgehead-Jumping Disease punishment technology that the present invention proposes is mainly based on the anti-excavation method in shrinkage joint, heavily spread along connecing and reform shrinkage joint to substitute existing milling, both solved near bituminous mixture compaction problems shrinkage joint, improve bumping at bridge-head situation, than reforming, shrinkage joint method has been saved overall cost, reduce the interference to traffic, and facts have proved, this technology has good functional performance, and has reduced to a certain extent shrinkage joint position flexible pavement and produce loose, the disease such as to peel off risk.
Claims (5)
1. a Treatment Methods for bumping at bridge-head, is characterized in that, comprises the following steps:
(1) treatment of road surfaces: milling end of the bridge place asphalt concrete pavement;
(2) shrinkage joint process: cut with road surface join end shrinkage joint; The described degree of depth that cuts is 4～5cm, and identical with the milling degree of depth on road surface in step (1);
(3) pitch is filled out paving: get bituminous concrete and fill out the road surface after milling in paving step (1), and extend the position, shrinkage joint spreading to after cutting in step (2); Then carry out spreading repeatedly to filling out the concrete road surface of black top and shrinkage joint;
(4) shrinkage joint excavation: shrinkage joint place in step (3) is filled out to the bituminous concrete excision of paving, and continued to cut shrinkage joint downwards along this excision face; The degree of depth at the described shrinkage joint place of cutting is 7～12cm;
(5) recover at shrinkage joint: the shrinkage joint that heavily spreads excavation in step (4); Shrinkage joint after described heavy paving flushes with asphalt concrete pavement and deck paving after spreading in step (3).
2. Treatment Methods according to claim 1, is characterized in that, in described step (4), the place of cutting at shrinkage joint is skewed slot shape, is 12cm near one end degree of depth of described asphalt concrete pavement, and the other end degree of depth is 7cm.
3. Treatment Methods according to claim 1, is characterized in that, in described step (5), the heavily paving process at shrinkage joint is as follows:
A, bar planting: in the concrete at the middle shrinkage joint of described step (4) place of cutting, implant screw-thread steel;
B, epoxy resin layer apply: after bar planting, and the face that cuts at cleaning shrinkage joint, and on face, smear epoxy resin cutting;
C, steel mesh reinforcement are laid: in the groove forming at the place of cutting, lay steel mesh reinforcement;
D, again build: finally get C40 concrete and again build shrinkage joint.
4. according to the arbitrary described Treatment Methods of claims 1 to 3, it is characterized in that, in described step (2), adopt milling machine laterally to cut shrinkage joint, cutting width is 25cm.
5. according to the arbitrary described Treatment Methods of claims 1 to 3, it is characterized in that, described step (3) is carried out bituminous concrete and is filled out before paving, at the face that cuts pad one deck fine grained sand or the gunnysack at shrinkage joint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210366600.0A CN102839595B (en) | 2012-09-26 | 2012-09-26 | Method for treating bump at bridge-head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210366600.0A CN102839595B (en) | 2012-09-26 | 2012-09-26 | Method for treating bump at bridge-head |
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| Publication Number | Publication Date |
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| CN102839595A CN102839595A (en) | 2012-12-26 |
| CN102839595B true CN102839595B (en) | 2014-12-10 |
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| CN201210366600.0A Expired - Fee Related CN102839595B (en) | 2012-09-26 | 2012-09-26 | Method for treating bump at bridge-head |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108755310B (en) * | 2018-06-11 | 2020-05-12 | 河南省公路工程试验检测中心有限公司 | Quantitative detection and treatment method for bump at bridge head |
| CN110792009A (en) * | 2019-10-17 | 2020-02-14 | 龙德建设有限公司 | Bridge head bump prevention and control structure based on concrete composite pavement and laying method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5105494A (en) * | 1990-12-03 | 1992-04-21 | Highway Construction Bridge Systems, Inc. | Continuously moving highway reconstruction device |
| CN101718075A (en) * | 2009-10-30 | 2010-06-02 | 长安大学 | Repair method of bridge head jump-driving road section surface |
| CN101967794A (en) * | 2010-09-18 | 2011-02-09 | 余闯 | New technology for treating vehicle bump at bridge ends |
| CN102051861A (en) * | 2009-11-02 | 2011-05-11 | 郑州优特基础工程维修有限公司 | Bridgehead vehicle bump prevention and control high polymer grouting technique and construction method thereof |
-
2012
- 2012-09-26 CN CN201210366600.0A patent/CN102839595B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5105494A (en) * | 1990-12-03 | 1992-04-21 | Highway Construction Bridge Systems, Inc. | Continuously moving highway reconstruction device |
| CN101718075A (en) * | 2009-10-30 | 2010-06-02 | 长安大学 | Repair method of bridge head jump-driving road section surface |
| CN102051861A (en) * | 2009-11-02 | 2011-05-11 | 郑州优特基础工程维修有限公司 | Bridgehead vehicle bump prevention and control high polymer grouting technique and construction method thereof |
| CN101967794A (en) * | 2010-09-18 | 2011-02-09 | 余闯 | New technology for treating vehicle bump at bridge ends |
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Granted publication date: 20141210 |