CN107034756A - A kind of frozen earth roadbed structure of natural convection ventilation pipe - Google Patents
A kind of frozen earth roadbed structure of natural convection ventilation pipe Download PDFInfo
- Publication number
- CN107034756A CN107034756A CN201610073361.8A CN201610073361A CN107034756A CN 107034756 A CN107034756 A CN 107034756A CN 201610073361 A CN201610073361 A CN 201610073361A CN 107034756 A CN107034756 A CN 107034756A
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- Prior art keywords
- pipe
- roadbed
- upright pipe
- present
- inclined tube
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Classifications
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- 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
- E01C3/04—Foundations produced by soil stabilisation
Abstract
A kind of frozen earth roadbed structure of natural convection ventilation pipe, including roadbed, long upright pipe, inclined tube, short upright pipe and rain and snow cap, long upright pipe is positioned over the Schattenseite of roadbed, and short upright pipe is positioned over the tailo of roadbed；Long upright pipe is connected with short upright pipe by inclined tube.Inclined tube is more than 25o with ground-angle.The present invention is forced cold air in oblique Bottomhole pressure, is reached the purpose freezed to roadbed using the pressure differential between long upright pipe and short upright pipe.The roadbed both sides of the present invention mouth of pipe upward, and has rain and snow sunshade gear, can prevent drift-sand, rainwater from entering in pipe, and conventional flat opening ventilation pipe foundation has the unfavorable factor poured into by drift-sand blocking and excess surface water.Winter cold energy at utmost can be collected and stored in basis by the present invention, be played an important roll to the stabilization for maintaining frozen soil basis.
Description
Technical field
The present invention relates to Permafrost Area road structure, specifically a kind of frozen earth roadbed structure of natural convection ventilation pipe.
Background technology
In Permafrost Area, because the strong endothermic of highway black asphalt pavement acts on the degeneration so that bottom ever-frozen ground
It is more violent.Roadbed heat is melted subsidence problems and not solved very well also so far.With《National expressway network is planned》Progressively
Implement, wherein about 30% will be travelling through Frozen Area, 2% pass through Permafrost Area, particularly Qinghai-Tibet highway will be travelling through China
Permafrost Area the most wide.The increase of express highway pavement width and the increase of heat absorption capacity, engineering difficulty are increased.At present
Block Gravel road base, heat pipe roadbed and its it is composite road bed all have that difficulty of construction is big, construction quality is difficult to ensure that high with cost
It is not enough.Existing ventilation pipe foundation works also with the principle of forced ventilation.Ventilation pipe foundation using forced ventilation principle exists
Summer also can be brought into heat by hot blast and be adversely affected, and cause the temperature difference in roadbed to increase, unfavorable to subgrade stability.
Therefore, stabilization of the relatively low road structure of a kind of easy construction of research and development, cost to maintenance Permafrost Area roadbed
Property is significant.
The content of the invention
In view of it is above-mentioned, it is an object of the invention to provide a kind of air pipeline based structures of free convection, to remain many
The stabilization of year permafrost region roadbed.
Realizing the technical scheme that the purpose of the present invention is used is：
A kind of frozen earth roadbed structure of natural convection ventilation pipe, including roadbed, long upright pipe, inclined tube, short upright pipe and rain and snow cap,
Long upright pipe is positioned over the Schattenseite of roadbed, and short upright pipe is positioned over the tailo of roadbed；Long upright pipe passes through oblique with short upright pipe
Pipe is connected.Inclined tube is more than 25o with ground-angle.
Uprightly pipe and short upright pipe outer end are provided with rain and snow cap to above-mentioned length, and rain and snow cap can prevent rain, snow from entering pipe
It is interior.
The present invention operation principle be：
Pressure differential between long upright pipe and short upright pipe, forces cold air in oblique Bottomhole pressure, reaches the purpose freezed to roadbed.
Advantages of the present invention and the beneficial effect produced are：
1st, the problem of present invention can avoid conventional forced ventilation pipe laying height.That is tradition ventilation pipeline base must from the ground one
Fixed height；The operation principle of the present invention is different from other ventilation pipe foundations, can be laid with ground proximity.
2nd, the roadbed both sides of the present invention mouth of pipe upward, and have rain and snow sunshade gear, can prevent drift-sand, rainwater enter pipe
It is interior, and conventional flat opening ventilation pipe foundation has the unfavorable factor for being blocked and being poured into excess surface water by drift-sand.
3rd, winter cold energy at utmost can be collected and stored in basis by the present invention, to maintaining the stable of frozen soil basis to have
Play an important role.
4th, the present invention can be such that construction more facilitates using ventilation duct segmentation.
Theoretical governing equation involved in the present invention is as follows：
1st, soil body region：
2nd, ventilation duct region：
（1）Continuity equation：
（2）The X-direction equation of momentum：
（3）The Y-direction equation of momentum：
（4）The Z-direction equation of momentum：
（5）Pulse energy k equations：
（6）Dissipative shock wave ε equations：
（7）Coefficient of eddy viscosity equation：
（8）Energy equation：
Brief description of the drawings
Fig. 1 is the frozen earth roadbed cross-sectional view of the present invention.
Fig. 2 is the frozen earth roadbed hygrogram of common wide cut.
Fig. 3 is the frozen earth roadbed hygrogram of wide cut of the present invention.
In figure：The upright pipe 1 of 1- length, 2- inclined tubes 2, the short upright pipes of 3-, 3- Roadbed Soils 4,5- rain and snow caps.
Embodiment
To more fully understand the present invention, it is further described below by embodiment, but not limitation of the invention.
As shown in figure 1, a kind of frozen earth roadbed structure of natural convection ventilation pipe, including it is roadbed 4, long upright pipe 1, inclined tube 2, short
Upright pipe 3 and rain and snow cap 5, long upright pipe 1 are positioned over the Schattenseite of roadbed 4, and short upright pipe 3 is positioned over the tailo of roadbed 4；It is long straight
Standpipe 1 is connected with short upright pipe 3 by inclined tube 2.
The upright pipe 1 of above-mentioned length and the short outer end of upright pipe 3 are provided with rain and snow cap 5.
Above-mentioned inclined tube 2 is more than 25o with ground-angle.
In order to confirm the feasibility and validity of above-mentioned technical proposal, the present invention utilizes theoretical governing equation（Formula 1-9）
Comparative study is carried out with banketed to common wide cut road structure frozen earth roadbed and of the present invention of numerical value simulating experimental（Fig. 2, figure
3）, by Fig. 2 and Fig. 3 comparative analysis, roadbed temperature is significantly lower than the roadbed temperature in Fig. 2 in Fig. 3, is more beneficial for frozen soil road
The protection of base, thus roadbed of the present invention compared to common wide cut banket it is frozen earth roadbed have significant cooling-down effect.
Claims (2)
1. a kind of frozen earth roadbed structure of natural convection ventilation pipe, including roadbed（4）, long upright pipe（1）, inclined tube（2）, short upright pipe
（3）With rain and snow cap（5）, it is characterised in that：The length is uprightly managed（1）It is positioned over roadbed（4）Schattenseite, the short upright pipe
（3）It is positioned over roadbed（4）Tailo；The length is uprightly managed（1）With short upright pipe（3）Pass through inclined tube（2）Connection.
2. a kind of frozen earth roadbed structure of natural convection ventilation pipe as claimed in claim 1, it is characterised in that：Described length is upright
Pipe（1）With short upright pipe（3）Outer end is provided with rain and snow cap（5）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610073361.8A CN107034756A (en) | 2016-02-03 | 2016-02-03 | A kind of frozen earth roadbed structure of natural convection ventilation pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610073361.8A CN107034756A (en) | 2016-02-03 | 2016-02-03 | A kind of frozen earth roadbed structure of natural convection ventilation pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107034756A true CN107034756A (en) | 2017-08-11 |
Family
ID=59532995
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610073361.8A Pending CN107034756A (en) | 2016-02-03 | 2016-02-03 | A kind of frozen earth roadbed structure of natural convection ventilation pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107034756A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108118571A (en) * | 2018-01-26 | 2018-06-05 | 四川农业大学 | Suitable for the direct drawing-in type active aeration-cooling device of subgrade in permafrost soil zone |
| CN111042156A (en) * | 2019-11-29 | 2020-04-21 | 花王生态工程股份有限公司 | Roadbed slope water-blocking ventilation type protection structure |
| CN113756280A (en) * | 2021-10-13 | 2021-12-07 | 中国科学院西北生态环境资源研究院 | Ventilation cooling system for roadbed slope in snowy permafrost region and construction method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2583200Y (en) * | 2002-11-14 | 2003-10-29 | 中国科学院寒区旱区环境与工程研究所 | Heat insulating cold transmitting building block used for protecting frozen earth |
| CN101012632A (en) * | 2007-01-12 | 2007-08-08 | 中国科学院寒区旱区环境与工程研究所 | Reinforced ventilating heat-proof foundation |
| CN201678924U (en) * | 2010-03-25 | 2010-12-22 | 中国科学院寒区旱区环境与工程研究所 | Permeable-wall ventilation tube-block and detritus layer cooling and heat-insulation composite roadbed |
| CN103388294A (en) * | 2013-07-31 | 2013-11-13 | 中国科学院寒区旱区环境与工程研究所 | Inverted T-shaped ventilating wide roadbed structure |
| CN205399114U (en) * | 2016-02-03 | 2016-07-27 | 中国科学院寒区旱区环境与工程研究所 | Natural convection ventilation pipe frozen soil roadbed structure |
-
2016
- 2016-02-03 CN CN201610073361.8A patent/CN107034756A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2583200Y (en) * | 2002-11-14 | 2003-10-29 | 中国科学院寒区旱区环境与工程研究所 | Heat insulating cold transmitting building block used for protecting frozen earth |
| CN101012632A (en) * | 2007-01-12 | 2007-08-08 | 中国科学院寒区旱区环境与工程研究所 | Reinforced ventilating heat-proof foundation |
| CN201678924U (en) * | 2010-03-25 | 2010-12-22 | 中国科学院寒区旱区环境与工程研究所 | Permeable-wall ventilation tube-block and detritus layer cooling and heat-insulation composite roadbed |
| CN103388294A (en) * | 2013-07-31 | 2013-11-13 | 中国科学院寒区旱区环境与工程研究所 | Inverted T-shaped ventilating wide roadbed structure |
| CN205399114U (en) * | 2016-02-03 | 2016-07-27 | 中国科学院寒区旱区环境与工程研究所 | Natural convection ventilation pipe frozen soil roadbed structure |
Non-Patent Citations (1)
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| 马巍等: "多年冻土地区主动冷却地基方法研究", 《冰川冻土》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108118571A (en) * | 2018-01-26 | 2018-06-05 | 四川农业大学 | Suitable for the direct drawing-in type active aeration-cooling device of subgrade in permafrost soil zone |
| CN111042156A (en) * | 2019-11-29 | 2020-04-21 | 花王生态工程股份有限公司 | Roadbed slope water-blocking ventilation type protection structure |
| CN113756280A (en) * | 2021-10-13 | 2021-12-07 | 中国科学院西北生态环境资源研究院 | Ventilation cooling system for roadbed slope in snowy permafrost region and construction method thereof |
| CN113756280B (en) * | 2021-10-13 | 2023-08-11 | 中国科学院西北生态环境资源研究院 | Ventilation cooling system for roadbed slope in snowy permafrost region and construction method thereof |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170811 |
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| RJ01 | Rejection of invention patent application after publication |