CN205557219U - Full wall ventilation formula frozen soil ventilation embankment structure - Google Patents
Full wall ventilation formula frozen soil ventilation embankment structure Download PDFInfo
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- CN205557219U CN205557219U CN201620215386.2U CN201620215386U CN205557219U CN 205557219 U CN205557219 U CN 205557219U CN 201620215386 U CN201620215386 U CN 201620215386U CN 205557219 U CN205557219 U CN 205557219U
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Abstract
The utility model relates to a full wall ventilation formula frozen soil ventilation embankment structure, this structure is including establishing the semicircular groove in embankment filled soil and burying underground semicircular groove last and with the communicating type of the falling U ventilation pipe in the external world. The utility model discloses has changed the heat exchange mechanism of ventilation pipe in the past, has improved ventilation tube roadbed's heat exchange efficiency by a wide margin, not only the evaporation through moisture effectively reduce the condition that the road bed disease produced, through the regulation and control of effectual heat convection, permafrost region's cold energy natural condition has been utilized to the at utmost in addition, when constantly reducing frozen earth temperature, effectively promotes frozen soil roadbed's stability.
Description
Technical field
This utility model relates to frozen soil engineering technical field, particularly relates to full wall ventilated formula frozen soil ventilation path embankment structure.
Background technology
In Permafrost Areas such as China Qinghai-Tibet Platean, northeast, by long-term evolution, develop and change, define thickness and reach several meters, even tens meters, each Thick Underground Ice having form.Along with change, the impact of Human dried bloodstains of climatic environment, frozen soil and ground ice can be caused to degenerate and melt, thus cause the generation of various engineering project disaster, various Important Project structural stability are produced material impact.
Employing by protection of permafrost engineering measure; active cooling frozen soil basis, is to ensure that the operation of frozen soil engineering long-term safety, stable critical path, and in these measures; the Convective Heat Transfer of Effective Regulation frozen soil engineering, is a type of the basic important engineering measure of protection of permafrost.Such measure is by effectively facilitating basis and the heat transfer process of external environment under winter or cool night temperatures environmental condition, and the effective heat transfer process on basis under suppression warm season or daytime high ambient conditions, thus reach cold energy in constantly storage roadbed within, the purpose that constantly reduction, stability of foundation constantly strengthen of frozen soil ground temperature.
Ventilated embankment is the one in the important engineering measure of Permafrost Area protection of permafrost.But, owing to the difference of structural shape, the difference of ventilation duct tube wall heat exchange property all can produce material impact to the overall heat exchange usefulness of roadbed.Thus, the emphasis of many technical concerns and research and development is the most just become.
" the transmural formula ventilation duct in frozen soil engineering " (Ge Xiurun, 02139009.6), although ventilation duct tube wall has the hole that ventilates in a large number, air the soil property directly and around ventilation duct can directly carry out heat exchange, but air velocity less in less hole, ventilation duct, it is difficult to play heat convection effect.Conversely, because air conduction coefficient is only 0.027W/m K, instead the air layer being detained in hole plays heat-blocking action, instead reduce the heat convection effect of ventilation duct.
" a kind of ventilation block stone layer wide cut road structure " (Fang Jianhong, 201420799258.8), being limited by the block stone air permeable rate of the confined space, air flow process, heat convection in block stone layer are all very limited, it is difficult to effectively carry out the cooling of roadbed.
Further, since Qinghai-Tibet exceedingly odious natural environment so that job site is difficult to the concrete prefabricated production of ventilation duct.And the ventilation duct produced in height above sea level lower ground district, owing to predominantly occupying the hollow unit of volume so that the freight volume of per car is very limited, increase engineering construction cost the most to a great extent.
In the face of the appearance of country's " 13 " strategical planning, Qinghai-Tibet highway will face build, but, highway is compared with common road, and common road Frozen soil problems compared with railway is the most prominent.There are some researches show (Yu Qihao etc. key issue research built by China's Permafrost Area highway. Chinese science (science of technology), 2014,44(4): 425 ~ 432), strong endothermic, bituminous paving water proof and the impact of prevention moisture evaporative heat loss due to dark-coloured pavement, making the get down the highway heat absorption intensity of roadbed of the same terms is more than 3 times of railway, and the main path of roadbed heat absorption is concentrated mainly on the centre of embankment, and it is difficult to dispel the heat to frozen soil around.And highway is compared with common road, more exacerbate the appearance of this phenomenon.When highway subgrade width increase about 1 times, the heat absorption intensity increase of embankment bottom surface about 0.6 times, roadbed heat absorption is gathered in the centre of roadbed further, thus produces " the heat build-up effect " become apparent from, and cause frozen soil more quickly to be degenerated.In the face of higher technical standard, broader highway pavement, the heat effect between highway and frozen soil is more significantly, and building highway in Permafrost Area will be in the face of the most prominent Frozen soil problems and build technical barrier.Due to the radical change of the aspect such as heat transfer path, intensity, the successful experience, the advanced technology that are obtained by Qinghai-Tibet Railway etc. are difficult to directly apply in the expressway construction of Qinghai-Tibet.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of full wall ventilated formula frozen soil ventilation path embankment structure strengthening frozen earth roadbed heat convection usefulness.
For solving the problems referred to above, full wall described in the utility model ventilated formula frozen soil ventilation path embankment structure, it is characterised in that: this structure includes the semi-circular recesses being located in embankment filled soil and the inverted U ventilation duct being embedded on described semi-circular recesses and communicating with the external world.
Described inverted U ventilation duct agrees with mutually with described semi-circular recesses, and by connect as one in semicircle or parabolic end face section, skew wall supporting section and base section are constituted.
The height of described end face section is 5 ~ 20cm.
The height of described skew wall supporting section is 0 ~ 20cm, and is 0 ~ 45 ° with the angle of vertical line.
The degree of depth of described semi-circular recesses is 0 ~ 20cm.
This utility model compared with prior art has the advantage that
1, the change of heat exchanged mechanism.
First, changing original draft tube aeration roadbed Convective Heat Transfer, the heat transfer process of conventional ventilation pipe foundation is the heat transfer by concrete ventilation duct tube wall, it is achieved embankment filled soil and the indirect heat exchange of convected air.This utility model is then to banket and direct heat transfer between convected air；Secondly, moisture evaporation, the heat transfer process of heat dissipation are added.The ventilation duct partition effect to the soil body in the past so that the moisture within embankment is difficult to distribute, and this utility model heat exchanging mode and the change of approach, can absorb substantial amounts of heat by the evaporation of moisture, phase transition process.Due to the drought environment condition of Qinghai-Tibet Platean, this kind of heat exchanged mechanism is all made to occupy bigger proportion in overall heat exchange.
2, significantly more heat exchange, cooling usefulness.
Firstly, since above-mentioned Dual heat exchange mechanism changes so that roadbed overall heat exchange ability significantly strengthens；Secondly as the minimizing of embankment moisture, the heat conductivity of the soil body is also made to increase, heat conductivility strengthens so that embankment overall heat exchange ability is inherently further improved；Effectively combine of both just so that the cooling usefulness of this kind of measure is significantly increased.
3, effective reduction of potential engineering disease.
Frozen earth roadbed engineering disease is mainly frost heave, thaw collapse, and the reason that needs producing this kind of disease is the freezing of roadbed internal moisture, melts.In original ventilated embankment structure, precast concrete pipeline satisfies the need the enclosed construction of dike internal moisture, has cut off the evaporation channel of embankment moisture.And this utility model, the ventilation type structure bottom heat convection so that the moisture within embankment can effectively distribute, and the most effectively reduces the moisture within roadbed, and the disease rate of frost heave, thaw collapse thus can be greatly reduced.
4, the raising of the reduction of engineering building material cost, cost performance.
First, it is to use the reduction about 30 ~ 40% of prefabricated reinforced concrete material；Secondly, the precast member for reinforcing bar concrete of this utility model design, have and can mutually stack advantage, while bicycle volume of transport being greatly improved, reduces cost of transportation, decrease breaking damage of goods rate.Effectively conventional ventilation duct is hollow, accounting space is big, cost of transportation is high, the big problems of breakage rate in elimination.The most effectively reduce engineering building material cost.
5, the reduction in engineering construction cycle.
In the past in the construction of precast concrete ventilation duct, for ensureing to bury underground the stability of ventilation duct, needing in the embankment filled soil after closely knit, excavation ventilation duct is buried groove, again splicing underground and is installed ventilation duct again.Will also result in ventilation duct to be difficult to be in close contact with surrounding soil simultaneously, and affect the heat transfer process to ventilation duct Yu surrounding soil.And this utility model, can specify that position, closely knit after embankment filled soil layer on directly lay, assembled ventilation duct, not only technique simplifies, and the construction period shortens.
Accompanying drawing explanation
Below in conjunction with the accompanying drawings detailed description of the invention of the present utility model is described in further detail.
Fig. 1 is structural representation of the present utility model.
Fig. 2 is side view of the present utility model.
Fig. 3 is inverted U-shaped ventilation duct structural representation in this utility model.
Fig. 4 is the engineering structure schematic three dimensional views in this utility model in embodiment.
In figure: 1 embankment filled soil；2 inverted U-shaped ventilation ducts；3 end face sections；4 skew wall supporting sections；5 base section；6 semi-circular recesses.
Detailed description of the invention
As shown in Fig. 1 ~ 4, full wall ventilated formula frozen soil ventilation path embankment structure, this structure includes the semi-circular recesses 6 being located in embankment filled soil 1 and the inverted U ventilation duct 2 being embedded on semi-circular recesses 6 and communicating with the external world.
Wherein:
Inverted U ventilation duct 2 agrees with semi-circular recesses 6 phase, and by connect as one in semicircle or parabolic end face section 3, skew wall supporting section 4 and base section 5 are constituted.The height of end face section 3 is 5 ~ 20cm.The height of skew wall supporting section 4 is 0 ~ 20cm, and is 0 ~ 45 ° with the angle of vertical line.
Inverted U ventilation duct 2 is the one in prefabricated reinforced concrete prefabricated component and the armored concrete of cast-in-site, concrete, foamed concrete.
The degree of depth of semi-circular recesses 6 is 0 ~ 20cm.
This utility model is specifically appliedExample 1:
(1), at the natural surface of Permafrost Area, lay according to 0.3 ~ 0.5m thickness direct layering, compact embankment bankets 1, to 1.5m height.
(2) carry out place smooth, use vibration type forcing press compaction subgrade banket 1 degree of compaction to 0.95.
(3) the construction of semi-circular recesses 6 it is aerated according to the spacing of 100cm.Use semicircle jump bit, vertical road-trend, carry out sequentially impacting the degree of depth to 10cm along the construction line drawn in advance.It is consequently formed semi-circular recesses 6 continuous, smooth, that the degree of depth is 10cm.
(4) the inverted U ventilation duct 2 using semicircle, height to be 20cm end face section 3.
By machinery or manually carry out the laying of inverted U-shaped ventilation duct 2, splice in proper order.Meanwhile, embankment filled soil 1 both sides 20cm is stretched out bottom inverted U-shaped ventilation duct 2.Thus complete the installation of a wherein inverted U-shaped ventilation duct 2.Thus circulate, complete the installation of the inverted U-shaped ventilation duct of whole construction section 2.
(6), according to conventional construction operation, carried out filling and advancing of embankment filled soil 1 by one of the installation completing the inverted U-shaped ventilation duct of whole construction section 2.For protecting the safety of inverted U-shaped ventilation duct 2, the control thickness that bankets of this time is 50cm.Then carry out flattening and vibroroller cmpacting.Then according to conventional, carry out follow-up engineering construction.
This utility model is specifically appliedExample 2:
Without carrying out step construction (3).Directly carry out the installation of inverted U-shaped ventilation duct 2.Then according to conventional, carry out follow-up construction in proper order.Improve work efficiency the most further.
Claims (5)
1. full wall ventilated formula frozen soil ventilation path embankment structure, it is characterised in that: this structure includes the semi-circular recesses (6) being located in embankment filled soil (1) and is embedded in the inverted U ventilation duct (2) that described semi-circular recesses (6) is upper and communicates with the external world.
2. full wall ventilated formula frozen soil ventilation path embankment structure as claimed in claim 1, it is characterized in that: described inverted U ventilation duct (2) is agreed with mutually with described semi-circular recesses (6), and by connect as one in semicircle or parabolic end face section (3), skew wall supporting section (4) and base section (5) are constituted.
3. full wall ventilated formula frozen soil ventilation path embankment structure as claimed in claim 2, it is characterised in that: the height of described end face section (3) is 5 ~ 20cm.
4. wall ventilated formula frozen soil ventilation path embankment structure as claimed in claim 2 complete, it is characterised in that: the height of described skew wall supporting section (4) is 0 ~ 20cm, and is 0 ~ 45 ° with the angle of vertical line.
5. full wall ventilated formula frozen soil ventilation path embankment structure as claimed in claim 1, it is characterised in that: the degree of depth of described semi-circular recesses (6) is 0 ~ 20cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620215386.2U CN205557219U (en) | 2016-03-17 | 2016-03-17 | Full wall ventilation formula frozen soil ventilation embankment structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620215386.2U CN205557219U (en) | 2016-03-17 | 2016-03-17 | Full wall ventilation formula frozen soil ventilation embankment structure |
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| CN205557219U true CN205557219U (en) | 2016-09-07 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107201701A (en) * | 2016-03-17 | 2017-09-26 | 中国科学院寒区旱区环境与工程研究所 | The complete ventilated formula frozen soil ventilation embankment of wall |
| CN110502772A (en) * | 2019-05-09 | 2019-11-26 | 中铁二院工程集团有限责任公司 | Slope permafrost region assembled self-ventilation road structure and design method |
| CN115627668A (en) * | 2022-10-27 | 2023-01-20 | 重庆交通大学 | Drainage ventilation structure of deep soil-containing heavy ice layer block stone roadbed at alpine and high altitude |
-
2016
- 2016-03-17 CN CN201620215386.2U patent/CN205557219U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107201701A (en) * | 2016-03-17 | 2017-09-26 | 中国科学院寒区旱区环境与工程研究所 | The complete ventilated formula frozen soil ventilation embankment of wall |
| CN110502772A (en) * | 2019-05-09 | 2019-11-26 | 中铁二院工程集团有限责任公司 | Slope permafrost region assembled self-ventilation road structure and design method |
| CN115627668A (en) * | 2022-10-27 | 2023-01-20 | 重庆交通大学 | Drainage ventilation structure of deep soil-containing heavy ice layer block stone roadbed at alpine and high altitude |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200821 Address after: 730000 No.318, Donggang West Road, Chengguan District, Lanzhou City, Gansu Province Patentee after: NORTHWEST INSTITUTE OF ECO-ENVIRONMENT AND RESOURCES, CAS Address before: Chengguan District of Gansu city of Lanzhou province Donggang West Road 730000 No. 320 Patentee before: Institute of environment and Engineering in cold and dry areas, Chinese Academy of Sciences |