CN1328190A - Method for preventing car jump between high road bed and bridge - Google Patents
Method for preventing car jump between high road bed and bridge Download PDFInfo
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- CN1328190A CN1328190A CN 00111138 CN00111138A CN1328190A CN 1328190 A CN1328190 A CN 1328190A CN 00111138 CN00111138 CN 00111138 CN 00111138 A CN00111138 A CN 00111138A CN 1328190 A CN1328190 A CN 1328190A
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- quicklime
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Abstract
A method for preventing carjump at the joint between bridge and road bed features that the mixture of aqueous expanding material such as calcium lime and mineral material is loaded in water-proof water-permeable bags, and said bags are added to the backfill material of the road bed near bridge end layer by layer in gradual decreasement mode. It the settlement of road way, said mixture is expanding to cancel said settlement, realizing the smooth joint between bridge and road bed.
Description
The invention belongs to the method for preventing and treating of a kind of back of the body sedimentation.
At present, the speedway that the whole nation puts into effect surpasses 10,000 kilometers, and these highways mostly are that country is the pulling economic development in recent years, build in the input process of increasing to infrastructure constructions such as highways.Because the roadbed of highway is higher, the construction period is shorter, the appearance that mostly degree is different after being open to traffic end of the bridge contain the top and jump the car phenomenon, particularly serious at high fill, soft foundation highway section.This has not only influenced the speed of service of vehicle, driving comfort, and some places even cause the fault and the traffic accident of vehicle become and are badly in need of the significant problem that solves in speedway and high fill highway construction and the operation.At this situation, many insiders further investigate this, have proposed the measure of prevention and punishment bumping at bridge-head.
The current high filling subgrade platform back of the body is contained the construction technology on top and end of the bridge and contained the top and jump the prophylactico-therapeutic measures of car and mainly contain, and: A. carries out to the former face of land that gauge pressure is real clearly, and soft foundation wherein carries out consolidation process (as powder spray piling, lime sand pile, throwing washer stone etc.).B. adopt can fixed shaping material (as rendzinas, two-ash soil etc.), the material (as sand, stone etc.) that is difficult for deforming, light material (as flyash) wait as the platform back of the body and contain the backfilling material that pushes up.C. according to the precompressed phase of roadbed height, make its abundant natural subsidence to the roadbed that built up and the back of the body of the platform after backfill regulation certain hour.D. in design and construction, increase transition slab at bridge head to alleviate the influence of platform back of the body sedimentation to driving.E. do interim low-cost pavement at the back filling behind abutment position, treat that sedimentation does regular road surface etc. after basicly stable again.
Though above method can reduce the sedimentation of the roadbed and the platform back of the body greatly, but because bridge belongs to two kinds of different structures with roadbed, the platform back of the body, the any roadbed or the platform back of the body all can not have the pile or the peculiar stability of pier of bridge, and the filler of any roadbed, the platform back of the body also can not have peculiar rigidity of bridge construction and stability.This just makes with regard to the relative bridge that the sedimentation that the sedimentation on the former face of land of high filling subgrade and roadbed and self compressive strain of platform back of the body filler are caused is an inevitable irreversible trend.Thereby the method before the present invention all is difficult to prevent and treat the stable preceding bumping at bridge-head disease of its natural subsidence.
Task of the present invention is: provide a kind of platform back of the body that can offset the sedimentation of the platform back of the body on demand to add material and job practices, make the natural subsidence of the platform back of the body obtain effectively low disappearing, thereby solve problem of bumping at bridge-head.
Solution of the present invention is: the particle of water-swellable material such as quicklime is carried out the individual particle parcel or its concentrates relative with mineral aggregate mixtures such as sand, aggregate chips will be added in the back filling behind abutment material after wrapping up, utilize the principle of its water-swellable, the natural subsidence of all or part of counteracting platform back of the body is with mild the coupling together of the roadbed of stable bridge and sedimentation.
Preparation method:
1. it is even that mineral aggregate mixs such as the big quicklime of back swell increment, the dry sand of pulverizing back adding 20～30% or aggregate chips are cleared up in choosing.
2. select the plastic woven cloth of uncoated suitable density to be sewn into the sack of diameter 10～15cm.
3. the mixture of the quicklime that mixes and sand being packed into, tamping ties mouth in the bag, makes the quicklime sand pocket.
Job practices:
1. carry on the back on the basis at the platform of handling well, the quicklime sand pocket is joined end to end by cross road base direction spacing 50～100cm put in a row.
2. insert filling compaction by the back filling behind abutment requirement.
3. putting the quicklime sand pocket by 1 method on the good filler of compacting, staggers in position and upper strata, and reduces by a row at shortcut Ji Chu.
4. 2,3 the process of repeating all adds until the quicklime sand pocket.
The consumption of expanding material:
According to the situations such as geology, the hydrology and roadbed materials of job location, the platform of the road of the similar situation that reference has been built up back of the body settling amount is measured the contingent settling amount of corresponding depth of fill roadbed.Again according to expanding material the final swell increment that can produce, the loss of swell increment with due regard to calculates the required expanding material quantity of this back filling behind abutment.
The quicklime sand pocket adds the effect in the back filling behind abutment material:
After the quicklime sand pocket added in the back filling behind abutment material, because it can not be directly contact with moisture in the filler, thereby does not influence the water content and the compacting of filler, and the quicklime sand pocket after the compacting had the compactness close with filler.Along with the slow immersion of moisture, quicklime is slowly cleared up in the process of subgrade settlement, and volume slowly increases.Raise as meeting water level between base, subgrade moisture content increases, and causes subgrade settlement to speed up, and then the expansion of quicklime is also accelerated simultaneously, thereby has offset the sedimentation of the platform back of the body.Because nearly end of the bridge direction has been added the quicklime sand pocket of sufficient amount, can produce enough swell incremenies,, thereby make its former absolute altitude remain unchanged in order to the sedimentation of whole counteracting platform back ofs the body.The quicklime sand pocket of end of the bridge direction far away reduces gradually, and its swell increment also reduces gradually, and the ability of offsetting sedimentation weakens gradually, until settling amount near roadbed, thereby produced from end of the bridge to the mild transition of roadbed effect, make and jump the car phenomenon and be resolved.The adding of mineral aggregate, quicklime is cleared up after with it in conjunction with forming than hard intensity.
Embodiment: 25 meters of platform across backs, 20 meters of length, the prediction settling amount is 8cm, the quicklime swell increment that adopts is 2, final swell increment loss is 20%, calculating the quicklime consumption is 24 cubic metres, medium coarse sand mixes 7.2 cubic metres by 30%, and the density woven cloth is made the sack of diameter 15cm, long 250cm in the employing.
Preparation method:
1. it is even that mineral aggregate mixs such as the big quicklime of back swell increment, the dry sand of pulverizing back adding 30% or aggregate chips are cleared up in choosing.
2. select the plastic woven cloth of uncoated suitable density to be sewn into the sack of diameter 15cm.
3. the mixture of the quicklime that mixes and sand being packed into, tamping ties mouth in the bag, makes the quicklime sand pocket.
Job practices:
1. carry on the back on the basis at the platform of handling well, the quicklime sand pocket is joined end to end by cross road base direction spacing 50cm put in a row.
2. insert filling compaction by the back filling behind abutment requirement.
3. putting the quicklime sand pocket by 1 method on the good filler of compacting, staggers in position and upper strata, and reduces by a row at shortcut Ji Chu.
4. 2,3 the process of repeating all adds until the quicklime sand pocket.
Claims (2)
1, the method for preventing and treating of car jump between high road bed and bridge, the particle of water-swellable material such as quicklime is carried out the individual particle parcel or its concentrates relative with mineral aggregate mixtures such as sand, aggregate chips will be added in the back filling behind abutment material after wrapping up, utilize the principle of its water-swellable, the natural subsidence of all or part of counteracting platform back of the body, the roadbed of stable bridge and sedimentation is gently coupled together, it is characterized in that having added in the back filling behind abutment material slow expanding material.
2, the method for preventing and treating of car jump between high road bed and bridge according to claim 1 is characterized in that by the parcel to water-swellable material, makes artificial slow expanding material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00111138 CN1328190A (en) | 2000-06-14 | 2000-06-14 | Method for preventing car jump between high road bed and bridge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00111138 CN1328190A (en) | 2000-06-14 | 2000-06-14 | Method for preventing car jump between high road bed and bridge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1328190A true CN1328190A (en) | 2001-12-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00111138 Pending CN1328190A (en) | 2000-06-14 | 2000-06-14 | Method for preventing car jump between high road bed and bridge |
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| CN (1) | CN1328190A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102296506A (en) * | 2010-06-23 | 2011-12-28 | 刘斯宏 | Geotechnical bag back subgrade and application method |
| CN102322008A (en) * | 2011-07-13 | 2012-01-18 | 华南理工大学 | Compensation method for roadbed settlement |
| CN102995551A (en) * | 2012-11-21 | 2013-03-27 | 北京航空航天大学 | Method for adjusting bridge floor-road surface differential settlement at road-bridge joint of in-service highway |
| CN105178126A (en) * | 2015-08-31 | 2015-12-23 | 中国矿业大学 | Road-bridge transitional zone composite structure in permafrost region and construction method |
| CN115162084A (en) * | 2022-06-22 | 2022-10-11 | 浙江工业大学 | Method for preventing vehicle bump at bridge head by means of differential settlement self-compensation of transition section of newly-built road bridge |
-
2000
- 2000-06-14 CN CN 00111138 patent/CN1328190A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102296506A (en) * | 2010-06-23 | 2011-12-28 | 刘斯宏 | Geotechnical bag back subgrade and application method |
| CN102322008A (en) * | 2011-07-13 | 2012-01-18 | 华南理工大学 | Compensation method for roadbed settlement |
| CN102995551A (en) * | 2012-11-21 | 2013-03-27 | 北京航空航天大学 | Method for adjusting bridge floor-road surface differential settlement at road-bridge joint of in-service highway |
| CN105178126A (en) * | 2015-08-31 | 2015-12-23 | 中国矿业大学 | Road-bridge transitional zone composite structure in permafrost region and construction method |
| CN115162084A (en) * | 2022-06-22 | 2022-10-11 | 浙江工业大学 | Method for preventing vehicle bump at bridge head by means of differential settlement self-compensation of transition section of newly-built road bridge |
| CN115162084B (en) * | 2022-06-22 | 2024-04-09 | 浙江工业大学 | Method for preventing bridge head from jumping by differential settlement self-compensation of transition section of newly-built highway bridge |
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| C06 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |