CN208038951U - A kind of Plateau Permafrost Regions railway road-bridge transition section composite construction - Google Patents
A kind of Plateau Permafrost Regions railway road-bridge transition section composite construction Download PDFInfo
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- CN208038951U CN208038951U CN201820089726.0U CN201820089726U CN208038951U CN 208038951 U CN208038951 U CN 208038951U CN 201820089726 U CN201820089726 U CN 201820089726U CN 208038951 U CN208038951 U CN 208038951U
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- transition section
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- bridge transition
- composite construction
- air cooling
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/60—Planning or developing urban green infrastructure
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Abstract
The utility model is related to a kind of Plateau Permafrost Regions railway road-bridge transition section composite constructions, are performed between the abutment and roadbed of road-bridge transition section, and subgrade bed side is ladder slope surface form；Road-bridge transition section composite construction includes slabstone air cooling layer, rubble air cooling layer and graded broken stone layer from bottom to top.The utility model meet frost heaving resistant performance is strong, permeance property is good, packing material size meet specification provides, compaction capacity is good, can active protection of permafrost, air cooling porosity as big as possible, easily construction etc., be the composite construction for meeting above-mentioned condition equalization point；It solves the problem of frost heave of Abutment Back soil, while actively protecting ever-frozen ground；It can be not only used for newly built railway, it can also be used to Plateau Permafrost Regions existing railway maintenance.
Description
Technical field
The utility model is related to a kind of new-type embankment structures, and in particular to a kind of Plateau Permafrost Regions railway transition
Section composite construction.
Background technology
The diseases such as Plateau Permafrost Regions railroad bridge tends to occur beam-ends and abutment breastwork is held out against, abutment breastwork leans forward are existing
As abutment back roadbed filling frost heave is to cause the basic reason of disease, i.e.,：
（1）When this cylinder water content of road-bridge transition section roadbed is higher, the higher roadbed filling of fine grained soil content is i.e. because cold
Season congelation generates larger frost-heaving deformation；
（2）For platform carries on the back roadbed ontology, abutment is equivalent to supporting and retaining system building.Act on platform the back of the body horizontal frost-heaving remove with
The frost heave of bridge back filling has outside the Pass, also related to the constraint of frost heave with abutment.Abutment category rigid structure constrains frost heave tight
Weight, makes the frost heave soil body generate larger horizontal frost-heaving；
（3）When body frost heaving is deformed by abutment " constraint ", that is, the horizontal frost-heaving in abutment is acted, beam is caused
End is held out against with breastwork, breastwork leans forward.
To solve Plateau Permafrost Regions railway abutment frost failure phenomenon, ensure railway operation safety, it is suitable that there is an urgent need for one kind
Close the roadbed new construction of Plateau Permafrost Regions road-bridge transition section.
Invention content
The purpose of this utility model is to provide a kind of Plateau Permafrost Regions railway road-bridge transition section composite construction, solves bridge
Platform back roadbed filling problem of frost heave, actively protects ever-frozen ground, easily constructs under the conditions of train operation.
Technical solution used by the utility model is：
A kind of Plateau Permafrost Regions railway road-bridge transition section composite construction, it is characterised in that：
It is performed between the abutment and roadbed of road-bridge transition section, roadbed side is ladder slope surface form；
Road-bridge transition section road structure includes slabstone air cooling layer, rubble air cooling layer and graded broken stone layer from bottom to top.
Slabstone air cooling layer bottom is provided with two layers of medium coarse sand, and composite geo-membrane is provided between two layers of medium coarse sand.
Slabstone air cooling layer both lateral sides bottom of slope is provided with slabstone berm.
Rubble air cooling layer and graded broken stone layer both lateral sides are provided with slabstone bank protection.
Two layers of medium coarse sand and the outside draining horizontal slope that the roadbed top surface below composite geo-membrane is the gradient ≮ 4%.
The ladder slope surface gradient of subgrade bed side is 1:1.5.
The slope surface gradient of road-bridge transition section composite construction entirety both sides is 1:1.5.
The utility model has the following advantages：
The utility model meet frost heaving resistant performance is strong, permeance property is good, packing material size meet specification regulation, compaction capacity
Good, energy active protection of permafrost, air cooling porosity as big as possible, easily construction etc., i.e.,：Meet the composite junction of above-mentioned condition equalization point
Structure solves the problem of frost heave of Abutment Back soil, while actively protecting ever-frozen ground；It can be not only used for newly built railway, it is also possible to
In Plateau Permafrost Regions existing railway maintenance.New construction is to solve Plateau Permafrost Regions Abutment Back to banket problem of frost heave
New technology, new method are provided, Plateau Permafrost Regions railway road-bridge transition section structure type is enriched, has innovated suitable plateau
The roadbed key technology of ever-frozen ground feature, for from now on《Plateau railway prospective design specification》Modification, improve provide engineering reality
Example.
Description of the drawings
Fig. 1 road-bridge transition section skiagraphs；
Fig. 2 road-bridge transition section cross-sectional views（A-A）；
Fig. 3 road-bridge transition section cross-sectional views（B-B）.
In figure, 1- abutments, 2- rail top lines, 3- graded broken stone layers, 4- rubbles are gas-cooled layer, and 5- slabstones are gas-cooled layer, under 6- beddings
Portion, 7- bottom layer of subgrade, 8- surface layer of subgrade bed, 9- seasonally thaw layers, 10- frozen soil natural permafrost tables, 11- hight-ice-content permafrosts, 12- are existing
Roadbed, 13- excavate bottom surface, 14- medium coarse sands, 15- composite geo-membranes, 16- road-bridge transition sections, 17- graded broken stones, and 18- inclines washer
Stone, 19- rubbles, 20- slabstones.
Specific implementation mode
The utility model is described in detail With reference to embodiment.
The utility model is related to a kind of Plateau Permafrost Regions railway road-bridge transition section composite constructions, in road-bridge transition section 16
Abutment 1 and roadbed between perform, roadbed side be ladder slope surface form, the slope surface gradient be 1:1.5.
Road-bridge transition section road structure includes slabstone air cooling layer 5, rubble air cooling layer 4 and graded broken stone layer 3 from bottom to top.Piece
5 bottom of stone air cooling layer is provided with two layers of medium coarse sand 14, and composite geo-membrane 15 is provided between two layers of medium coarse sand 14.Road-bridge transition section
The slope surface gradient of composite construction entirety both sides is 1:1.5.
Slabstone air cooling 5 both lateral sides bottom of slope of layer is provided with 20 berm of slabstone.Rubble air cooling layer 4 and graded broken stone layer 3 are laterally
Both sides are provided with 20 bank protection of slabstone.
The roadbed top surface of two layers of medium coarse sand 14 and 15 lower section of composite geo-membrane is the outside draining horizontal slope of the gradient ≮ 4%.
The utility model sequence of construction is followed successively by：Excavate the soil body, geomembrane water barrier, washer rock layers of inclining, rubble air cooling layer,
Graded broken stone layer, slabstone bank protection.Specific construction process and technological process are as follows：
1. using construction beam overhead transmission line, roadbed is excavated from top to bottom to the above 1m in ground, the gradient ≮ 4% is made in top surface
Outside draining horizontal slope.
2. after excavating in place, 0.2m thickness medium coarse sand bed courses, centre folder paving composite geo-membrane are laid in bottom（Two cloth, one film）
Water barrier.
3. bedding washer rock layers below of inclining of constructing, slabstone is no grading, dysgeogenous hard stone, grain through 10~
30cm。
4. bottom layer of subgrade（Thickness 1.9m) fill rubble, 5~8cm of ballast grain sizes, compacting criteria：Ground coefficient K30 >=
130MPa/m, porosity<31%.
5. surface layer of subgrade bed（Thickness 0.6m) fill graded broken stone, compacting criteria：Ground coefficient K30 >=150MPa/m, hole
Rate<28%.
6. bedding rubble side slope sets slabstone bank protection（Top surface width 1.6m）Prevent rubble because above and below pedestrian, train vibrations tumble
Roadbed.
The content of the utility model is not limited to cited by embodiment, and those of ordinary skill in the art are new by reading this practicality
Type specification and to any equivalent transformation that technical solutions of the utility model are taken, be the claim institute of the utility model
Cover.
Claims (7)
1. a kind of Plateau Permafrost Regions railway road-bridge transition section composite construction, it is characterised in that：
In road-bridge transition section（16）Abutment（1）It is performed between roadbed, roadbed side is ladder slope surface form；
Road-bridge transition section road structure includes slabstone air cooling layer from bottom to top（5）, rubble be gas-cooled layer（4）With graded broken stone layer（3）.
2. a kind of Plateau Permafrost Regions railway road-bridge transition section composite construction according to claim 1, it is characterised in that：
Slabstone air cooling layer（5）Bottom is provided with two layers of medium coarse sand（14）, two layers of medium coarse sand（14）Between be provided with composite geo-membrane
（15）.
3. a kind of Plateau Permafrost Regions railway road-bridge transition section composite construction according to claim 1, it is characterised in that：
Slabstone air cooling layer（5）Both lateral sides bottom of slope is provided with slabstone（20）Berm.
4. a kind of Plateau Permafrost Regions railway road-bridge transition section composite construction according to claim 1, it is characterised in that：
Rubble air cooling layer（4）With graded broken stone layer（3）Both lateral sides are provided with slabstone（20）Bank protection.
5. a kind of Plateau Permafrost Regions railway road-bridge transition section composite construction according to claim 2, it is characterised in that：
Two layers of medium coarse sand（14）With composite geo-membrane（15）The roadbed top surface of lower section is the outside draining horizontal slope of the gradient ≮ 4%.
6. a kind of Plateau Permafrost Regions railway road-bridge transition section composite construction according to claim 1, it is characterised in that：
The ladder slope surface gradient of subgrade bed side is 1:1.5.
7. a kind of Plateau Permafrost Regions railway road-bridge transition section composite construction according to claim 1, it is characterised in that：
The slope surface gradient of road-bridge transition section composite construction entirety both sides is 1:1.5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820089726.0U CN208038951U (en) | 2018-01-19 | 2018-01-19 | A kind of Plateau Permafrost Regions railway road-bridge transition section composite construction |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820089726.0U CN208038951U (en) | 2018-01-19 | 2018-01-19 | A kind of Plateau Permafrost Regions railway road-bridge transition section composite construction |
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| CN208038951U true CN208038951U (en) | 2018-11-02 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114855518A (en) * | 2021-11-18 | 2022-08-05 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | Permafrost region hydrothermal protection roadbed structure |
| CN115125830A (en) * | 2022-06-30 | 2022-09-30 | 中国科学院西北生态环境资源研究院 | Rigidity balance structure for road and bridge transition section in permafrost region and construction method thereof |
-
2018
- 2018-01-19 CN CN201820089726.0U patent/CN208038951U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114855518A (en) * | 2021-11-18 | 2022-08-05 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | Permafrost region hydrothermal protection roadbed structure |
| CN115125830A (en) * | 2022-06-30 | 2022-09-30 | 中国科学院西北生态环境资源研究院 | Rigidity balance structure for road and bridge transition section in permafrost region and construction method thereof |
| CN115125830B (en) * | 2022-06-30 | 2023-04-28 | 中国科学院西北生态环境资源研究院 | Permafrost region road bridge transition section rigidity balance structure and construction method thereof |
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