CN108411727A - A kind of frozen earth roadbed structure of wide cut - Google Patents
A kind of frozen earth roadbed structure of wide cut Download PDFInfo
- Publication number
- CN108411727A CN108411727A CN201810042270.7A CN201810042270A CN108411727A CN 108411727 A CN108411727 A CN 108411727A CN 201810042270 A CN201810042270 A CN 201810042270A CN 108411727 A CN108411727 A CN 108411727A
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- CN
- China
- Prior art keywords
- roadbed
- metalling
- wide cut
- ventilation duct
- frozen earth
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C3/00—Foundations for pavings
- E01C3/06—Methods or arrangements for protecting foundations from destructive influences of moisture, frost or vibration
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Road Paving Structures (AREA)
Abstract
The invention mainly relates to a kind of frozen earth roadbed structure of wide cut, including metalling, roadbed body is filled by metalling, and insulating layer is equipped between supercrust and metalling, and horizontally embedded ventilation duct in metalling, ventilation duct is equipped with several ventilation holes.The road structure can efficiently reduce subgrade soil temperature, and can soil temperature field asymmetry problem under the roadbed that brings of Yin Yang balancing slope effect.
Description
Technical field
The present invention relates to road traffic engineering field, especially a kind of frozen earth roadbed structure of wide cut.
Background technology
The requirement deepened constantly with strategy to develop western regions, and smoothly building up and safe operation in Qinghai-Tibet Railway
On the basis of, building for Qinghai-Tibet highway is particularly important.The width of high-grade wide cut highway embankment is significantly increased and is filled out
Native height is got higher, these change so that the heat that subgrade soil absorbs increases.And the driving road surface for using pitch or cement to be laid with
Year-round average temperature is higher by 2-3 oC than macadam pavement.Further, since line alignment and roadbed both sides solar radiation difference meeting
Cause embankment both sides temperature imbalance Slopes phenomenon.Under the effect of Slopes effect, the temperature field in subgrade soil will produce
Asymmetric distribution, causes roadbed that differential settlement transversely occurs.Under the comprehensive function of these problems, high-grade wide cut is public
The thermal stability on road receives serious influence.
Invention content
To solve the above problems, the present invention provides a kind of frozen earth roadbed structure of wide cut, which can efficiently reduce
Subgrade soil temperature, and can soil temperature field asymmetry problem under the roadbed that brings of Yin Yang balancing slope effect.
To achieve the above object, the present invention adopts the following technical scheme that：
A kind of frozen earth roadbed structure of wide cut, including roadbed body, roadbed body are made of metalling, and road surface is equipped on roadbed body
Layer, is equipped with insulating layer between supercrust and metalling, and the horizontally embedded ventilation duct in metalling is equipped with several on ventilation duct
Ventilation hole.
It is 5 ~ 20mm that the roadbed body, which selects grain size, the macadam gradating composition of 20 ~ 40mm, 40 ~ 80mm, 80 ~ 120mm.
The insulating layer selects one kind of polystyrene, polyethylene, polyurethane heat insulation material.
The ventilation duct is divided into both ends, and one end is roadbed tailo end, and the other end is roadbed Schattenseite end.
The roadbed tailo end of the ventilation duct is equipped with several ventilation holes, and the roadbed Schattenseite end of ventilation duct does not set ventilation then
Hole.
The present invention has the advantages that：
1, it is 5 ~ 20mm that roadbed body, which selects grain size, the macadam gradating composition of 20 ~ 40mm, 40 ~ 80mm, 80 ~ 120mm, to meet height
Standard highway code requirement strengthens the cooling-down effect of roadbed body by the convection action of air in winter road matrix pore.
2, insulating layer selects one kind of polystyrene, polyethylene, polyurethane heat insulation material, insulating layer that can reduce warm season by road
Face is passed to the heat of roadbed body.
3, the uneven cooling by combining the air flowing in ventilation duct to be given birth to the air stream movable property in the matrix pore of road
Effect, the soil temperature distribution asymmetry trend that can be generated with embankment Slopes offsets, lateral to reach balance roadbed
Temperature field ensures the purpose of frozen earth roadbed stabilization.
Description of the drawings
Fig. 1 is the cross-section diagram of the present invention；
Fig. 2 is the sectional view of inventive vent;
Fig. 3,4,5,6 are the thermo parameters method figure inside present invention experiment roadbed.
Figure label：1, insulating layer；2, roadbed body；3, ventilation duct；4, supercrust；5, ventilation hole；A, roadbed tailo；B, road
Base Schattenseite.
Specific implementation mode
The present invention can be explained in more detail by following embodiment：
As shown in Figure 1, 2, the present invention provides a kind of frozen earth roadbed structure of wide cut, which includes roadbed body 2, roadbed body 2 be by
Metalling is constituted, and supercrust 4 is equipped on roadbed body 2, insulating layer 1 is equipped between supercrust 4 and metalling 2, in metalling 2
In horizontally embedded ventilation duct 3, on ventilation duct 3 be equipped with several ventilation holes 5.
It is 5 ~ 20mm that roadbed body 2, which selects grain size, the macadam gradating composition of 20 ~ 40mm, 40 ~ 80mm, 80 ~ 120mm, to meet
High-grade highway code requirement strengthens the cooling effect of roadbed body by the convection action of air in 2 hole of winter roadbed body
Fruit.
Insulating layer 1 selects one kind of polystyrene, polyethylene, polyurethane heat insulation material, insulating layer 1 that can reduce warm season by road
Face is passed to the heat of roadbed body.
Ventilation duct 3 divides for both ends, and one end is the ends roadbed tailo A, and the other end is the ends roadbed Schattenseite B.
The ends roadbed tailo A of ventilation duct 3 are equipped with several ventilation holes 5, and the ends roadbed Schattenseite B of ventilation duct 3 do not set ventilation then
The setting in hole 5, ventilation duct 3 can realize the change of surrounding soil temperature by quickly divulging information.
By the uneven cooling for combining the air flowing in ventilation duct 3 and the air stream movable property life in 2 hole of roadbed body
Effect, the soil temperature distribution asymmetry trend that can be generated with embankment Slopes offsets, lateral to reach balance roadbed
Temperature field ensures the purpose of frozen earth roadbed stabilization.
Fig. 3 be common fill subgrade Schattenseite and the tailo temperature difference at 2.25 DEG C, and road operation was on July 15th, 1
When（Year environment temperature highest）, the thermo parameters method figure inside roadbed can see, left side side slope from 0 DEG C of thermoisopleth in figure
（Tailo）The thaw depth of the lower soil body is significantly more than right side side slope（Schattenseite）Locate, temperature field is not right in roadbed caused by Slopes
Claim the state of distribution notable.Fig. 4 is the road structure of the present invention in the roadbed when the service time is identical as common fill subgrade
Thermo parameters method figure.From the figure, it can be seen that compared with common fill subgrade, in road structure of the invention 0 DEG C it is isothermal
Height has significantly been lifted, and the temperature field under embankment is symmetric substantially.
Fig. 5 and Fig. 6 is common fill subgrade and roadbed of the invention at January 15 day of the operation by the 11st year（Year environment
Temperature is minimum）, the thermo parameters method figure inside roadbed.By Fig. 6 it can be seen that the bulk temperature in roadbed occurs back to freeze completely,
Exist without region is melted, and the temperature field of embankment lower part has been symmetric, Slopes effect is significantly improved.
Claims (5)
1. a kind of frozen earth roadbed structure of wide cut, including roadbed body, roadbed body are made of metalling, and road surface is equipped on roadbed body
Layer, is equipped with insulating layer between supercrust and metalling, and the horizontally embedded ventilation duct in metalling is equipped with several on ventilation duct
Ventilation hole.
2. the frozen earth roadbed structure of a kind of wide cut according to claim 1, it is characterised in that：Roadbed body select grain size be 5~
The macadam gradating composition of 20mm, 20~40mm, 40~80mm, 80~120mm.
3. the frozen earth roadbed structure of a kind of wide cut according to claim 1, it is characterised in that：Insulating layer selection polystyrene,
One kind of polyethylene, polyurethane heat insulation material.
4. the frozen earth roadbed structure of a kind of wide cut according to claim 1, it is characterised in that：Ventilation duct is divided into both ends, one end
For roadbed tailo end, the other end is roadbed Schattenseite end.
5. the frozen earth roadbed structure of a kind of wide cut according to claim 4, it is characterised in that：On the roadbed tailo end of ventilation duct
Equipped with several ventilation holes, the roadbed Schattenseite end of ventilation duct does not set ventilation hole then.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810042270.7A CN108411727A (en) | 2018-01-17 | 2018-01-17 | A kind of frozen earth roadbed structure of wide cut |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810042270.7A CN108411727A (en) | 2018-01-17 | 2018-01-17 | A kind of frozen earth roadbed structure of wide cut |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108411727A true CN108411727A (en) | 2018-08-17 |
Family
ID=63125942
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810042270.7A Pending CN108411727A (en) | 2018-01-17 | 2018-01-17 | A kind of frozen earth roadbed structure of wide cut |
Country Status (1)
| Country | Link |
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| CN (1) | CN108411727A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113373754A (en) * | 2021-07-01 | 2021-09-10 | 新疆铁道勘察设计院有限公司 | Air isolation layer construction method, isolation overhead net and frozen soil roadbed construction method |
| US11987937B1 (en) * | 2023-01-17 | 2024-05-21 | Northwest Institute Of Eco-Environment And Resources, Chinese Academy Of Sciences | Airflow-enhanced embankment ventilation structure, composite embankment structure, and construction method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004285707A (en) * | 2003-03-24 | 2004-10-14 | Iwate Kenko Kk | Thermal insulation roadbed course structure |
| CN101818471A (en) * | 2010-03-25 | 2010-09-01 | 中国科学院寒区旱区环境与工程研究所 | Application of transparent wall vent pipe-massive stone layer cooling and insulating composite road bed in wide road |
| CN204825539U (en) * | 2015-07-20 | 2015-12-02 | 宁夏大学 | Control difference in temperature prevents roadbed structure of cold mountain area highway inhomogeneous deformation |
| 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 |
| CN205617177U (en) * | 2016-03-17 | 2016-10-05 | 中国科学院寒区旱区环境与工程研究所 | Compound cold -storage roadbed structure suitable for permafrost region road engineering |
-
2018
- 2018-01-17 CN CN201810042270.7A patent/CN108411727A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004285707A (en) * | 2003-03-24 | 2004-10-14 | Iwate Kenko Kk | Thermal insulation roadbed course structure |
| CN101818471A (en) * | 2010-03-25 | 2010-09-01 | 中国科学院寒区旱区环境与工程研究所 | Application of transparent wall vent pipe-massive stone layer cooling and insulating composite road bed in wide road |
| CN204825539U (en) * | 2015-07-20 | 2015-12-02 | 宁夏大学 | Control difference in temperature prevents roadbed structure of cold mountain area highway inhomogeneous deformation |
| 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 |
| CN205617177U (en) * | 2016-03-17 | 2016-10-05 | 中国科学院寒区旱区环境与工程研究所 | Compound cold -storage roadbed structure suitable for permafrost region road engineering |
Non-Patent Citations (1)
| Title |
|---|
| 邰博文;刘建坤;房建宏;刘晖;田亚护;: "高温冻土区高速公路特殊结构路基地温分布特征及降温效果分析", 岩石力学与工程学报, no. 1, pages 3696 - 3704 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113373754A (en) * | 2021-07-01 | 2021-09-10 | 新疆铁道勘察设计院有限公司 | Air isolation layer construction method, isolation overhead net and frozen soil roadbed construction method |
| US11987937B1 (en) * | 2023-01-17 | 2024-05-21 | Northwest Institute Of Eco-Environment And Resources, Chinese Academy Of Sciences | Airflow-enhanced embankment ventilation structure, composite embankment structure, and construction method thereof |
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