CN204608547U - A kind of Permafrost Area is for spreading the ventilation curb of flexible pavement heat - Google Patents
A kind of Permafrost Area is for spreading the ventilation curb of flexible pavement heat Download PDFInfo
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- CN204608547U CN204608547U CN201520282978.1U CN201520282978U CN204608547U CN 204608547 U CN204608547 U CN 204608547U CN 201520282978 U CN201520282978 U CN 201520282978U CN 204608547 U CN204608547 U CN 204608547U
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- permafrost
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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
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Abstract
The utility model relates to a kind of Permafrost Area for spreading the ventilation curb of flexible pavement heat.The highway engineering of Permafrost Area makes its Permafrost Degeneration that underlies violent due to the strong endothermic effect of highway dark asphalt rigid pavement, drastically influence the safe operation of Permafrost Area highway engineering.Ventilation curb of the present utility model is arranged at above roadbed along subgrade cross section direction; Inside top is provided with longitudinally recessed concrete pateriform gutter, and top outer is provided be connected with side slope outside roadbed domatic; Ventilation curb inside is provided with the gravity vent of multiple tracks lateral direction penetrating, and bottom is provided with multiple tracks and protrudes longitudinal Anti skid stop dog downwards, is integral prefabricated concrete element.The utility model is arranged in flexible pavement both sides, the heat side direction of flexible pavement is fully exchanged with extraneous cold, the Permafrost Degeneration that underlies that the effect of effective reduction asphalt concrete pavement strong endothermic causes, and then reach maintenance subgrade in permafrost soil zone stability.
Description
Technical field
the utility model belongs to transport development technical field, is specifically related to a kind of Permafrost Area for spreading the ventilation curb of flexible pavement heat.
Background technology
In Permafrost Area, because ever-frozen ground is strong to temperature sensitivity, road project can cause frozen soil heat absorption of underliing to melt, and then threaten the stability of upper part work, this Frozen soil problems is the major issue faced by the engineering construction of Permafrost Area, and the highway engineering of Permafrost Area is especially because the strong endothermic effect of highway dark asphalt rigid pavement makes its Permafrost Degeneration that underlies further violent, data shows, under Qinghai-Tibet Highway asphalt concrete pavement in summer, temperature is far above native state, about differ 8 ~ 14 DEG C, and the phase of thawing is relatively long, annual heat total income increase about 18%.After making flexible pavement, under roadbed, permafrost is persistently overheating, frozen soil upper limit constantly declines, particularly high temperature height ice amount section, fall is up to about 4m, makes roadbed integral sinking, produce wave, subgrade defect such as hole groove and differential settlement etc., within the scope of tens meters of roadbeds, the discrepancy in elevation of crest and trough can reach 0.3 ~ 0.5m, have even more than 0.5m, drastically influence the safe operation of Permafrost Area highway engineering.
In order to reduce the effect of asphalt concrete pavement strong endothermic, and then reach maintenance subgrade in permafrost soil zone stability object, Domestic Scientific Research worker starts with from change roadbed thermal conditions, namely surface layer is reduced to the absorptive capacity of solar radiant energy, improve reflectivity angle and propose series of measures and scheme, and test at Qinghai-Tibet Highway and national highway G214 line, build cement concrete pavement as adopted as a kind of measure solving and reduce roadbed thaw subsidence.But the cement concrete pavement built in Permafrost Area, due to the impact of human activity and climatic factor, anti-freezing property and the anti-deformation of adding cement concrete pavement are poor, and permafrost affects extremely responsive to external world, be easy to larger differential settlement occurs and causes subgrade and pavement to destroy.Qinghai-Tibet Highway Permafrost Area cement concrete pavement result on trial shows: the trial effect of Permafrost Area cement concrete pavement is very undesirable, Qinghai-Tibet Highway five road beam cement concrete pavement test section destroys extremely serious, almost full width is destroyed, the serious normal operation that have impact on traffic.In addition, as from reduction surface layer to the absorptive capacity of solar radiant energy, improve reflectivity, the measure such as in vain of the random polypropylene selecting look shallow (i.e. APP) top course binder and asphalt varnish.But show in the Experiment Road result of Qinghai-Tibet Highway Wudaoliang region (K273+000 ~+150) making; random polypropylene (i.e. APP) is though road surface has the effect of protection of permafrost; mechanical strength and bituminous mixture are substantially close; some index is still better than bituminous mixture (as stability, full water compressive strength); but compound rolls difficulty; road surface compactness is poor, and hole interlocks, and infiltration is serious.APP binder ductility is very poor, 0 ~ 65 DEG C of ductility excursion is 1.8 ~ 2.9cm, 5 DEG C of ductilities are only 2.9cm, the easy shrinkage cracking of APP mixture pavement under low temperature, rain, snow, ooze rear aggravation pavement disease under water, melt phase road surface bulk strength to decline, Experiment Road pattern cracking is general, draws under the weather conditions of drawing crack, anti-freezing property need be considered emphatically in Qinghai-Tibet Platean, should not adopt APP gravel mixture pavement.The white Study on Measures of asphalt varnish shows, after asphalt varnish is white, the maximum deeply comparatively paint Cynanchum glaucescens that melts obviously rises, but asphalt road finish paint is easily denuded in vain, and color is difficult to lastingly, limit the use on road.Road surface, current Permafrost Area is still based on the asphalt pavement structure of black.
Because global warming and Human dried bloodstains increasingly sharpen, Permafrost Degeneration is accelerated, and this makes the engineering construction of Permafrost Area more difficult.In addition, along with the develop rapidly of Structure Dynamics In The Qinghai-tibet Region economic society, build the inexorable trend that speedway has become highway in China transport development development in Plateau Permafrost Regions.For the speedway passing through In Permafrost Regions of Qinghai-xizang Plateau, framing width of subgrade is increased to 12.25m by 10m, and integral subgrade is then 24.5m or wider, and along with the increase of width of subgrade, its caloric receptivity is larger, and frozen earth roadbed thermally-stabilised problem is more severe.
Summary of the invention
The purpose of this utility model is to provide a kind of Permafrost Area for spreading the ventilation curb of flexible pavement heat, effectively can spread ever-frozen ground flexible pavement superstructure heat, reaches the object maintaining subgrade in permafrost soil zone stability.
The technical scheme that the utility model adopts is:
Permafrost Area, for spreading a ventilation curb for flexible pavement heat, is characterized in that:
Ventilation curb is arranged at above roadbed along subgrade cross section direction;
Ventilation curb inside top is provided with longitudinally recessed concrete pateriform gutter, and ventilation curb top outer is provided be connected with side slope outside roadbed domatic;
Ventilation curb inside is provided with the gravity vent of multiple tracks lateral direction penetrating.
Be provided with multiple tracks bottom ventilation curb and protrude longitudinal Anti skid stop dog downwards.
Ventilation curb is integral prefabricated concrete element.
The utility model has the following advantages:
The utility model is Prefabricated, and intensity is high, good integrity, and unified installation is assembled, and construction technology is easy, practical, can reach logical wind action after installation, and structure is simple, with low cost, economical and practical.
The gravity vent of ventilation curb is connected with flexible pavement, the heat of flexible pavement can be made to carry out interchange of heat in side direction and air by the gravity vent of ventilated embankment, the heat-absorbing action of effective reduction flexible pavement in summer makes its Permafrost Degeneration that underlies, and then reaches maintenance subgrade in permafrost soil zone stability object.
Accompanying drawing explanation
Fig. 1 the utility model facade structures arrangement diagram.
Fig. 2 the utility model elevation.
Fig. 3 the utility model side view.
Fig. 4 is the utility model three-dimensional structure diagram.
In figure, 1-roadbed, 2-bed course, 3-sub-surface, 4-bituminous pavement top, 5-ventilation curb, 6-concrete pateriform gutter, 7-gravity vent, 8-Anti skid stop dog.
Detailed description of the invention
Below in conjunction with detailed description of the invention, the utility model is described in detail.
A kind of Permafrost Area that the utility model relates to is for spreading the ventilation curb of flexible pavement heat, be arranged at above roadbed 1 along roadbed 1 cross-sectional direction, being positioned at the top of bed course 2 and sub-surface 3, is bituminous pavement top 4 above the sub-surface 3 inside road both sides ventilation curb 5.
Ventilation curb 5 is integral prefabricated concrete element, and inside top is provided with longitudinally recessed concrete pateriform gutter 6, and ventilation curb 5 top outer is provided be connected with side slope outside roadbed 1 domatic.Ventilation curb 5 inside is provided with the gravity vent 7 of multiple tracks lateral direction penetrating, can be arranged in parallel three roads, contacts with bituminous pavement top 4, makes bituminous pavement top 4 can side direction and outside air generation heat transfer effect, thus the heat of diffusion flexible pavement, reach the effect of cooling roadbed.Be provided with multiple tracks bottom ventilation curb 5 and protrude longitudinal Anti skid stop dog 8 downwards.
During construction:
(1) first according to the prefabricated ventilation curb 5 of design size.
(2), after surface layer and cutting optimal have been constructed in roadbed 1, bed course 2, sub-surface 3 and bituminous pavement top 4, setting-out is carried out according to design elevation and coordinate position to by roadbed 1.
(3) at Anti skid stop dog 8 design section fluting, and along route direction, prefabricated ventilation curb 5 is installed successively.
(4) mounted ventilation curb 5 is adjusted, ensure the surfacing of ventilation curb 5, after height is consistent with design, adopt mortar to carry out jointing to mounted prefabricated ventilation curb 5.
(5) upper layer of making bituminous pavement top 4, and maintenance is carried out to mortar-chalked joint.
Content of the present utility model is not limited to cited by embodiment, and the conversion of those of ordinary skill in the art by reading the utility model manual to any equivalence that technical solutions of the utility model are taked, is claim of the present utility model and contains.
Claims (3)
1. Permafrost Area is for spreading a ventilation curb for flexible pavement heat, it is characterized in that:
Ventilation curb (5) is arranged at roadbed (1) top along roadbed (1) cross-sectional direction;
Ventilation curb (5) inside top is provided with longitudinally recessed concrete pateriform gutter (6), and ventilation curb (5) top outer is provided be connected with roadbed (1) outside side slope domatic;
Ventilation curb (5) inside is provided with the gravity vent (7) of multiple tracks lateral direction penetrating.
2. a kind of Permafrost Area according to claim 1 is for spreading the ventilation curb of flexible pavement heat, it is characterized in that:
Ventilation curb (5) bottom is provided with multiple tracks and protrudes longitudinal Anti skid stop dog (8) downwards.
3. a kind of Permafrost Area according to claim 2 is for spreading the ventilation curb of flexible pavement heat, it is characterized in that:
Ventilation curb (5) is integral prefabricated concrete element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520282978.1U CN204608547U (en) | 2015-05-05 | 2015-05-05 | A kind of Permafrost Area is for spreading the ventilation curb of flexible pavement heat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520282978.1U CN204608547U (en) | 2015-05-05 | 2015-05-05 | A kind of Permafrost Area is for spreading the ventilation curb of flexible pavement heat |
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| Publication Number | Publication Date |
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| CN204608547U true CN204608547U (en) | 2015-09-02 |
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| CN201520282978.1U Active CN204608547U (en) | 2015-05-05 | 2015-05-05 | A kind of Permafrost Area is for spreading the ventilation curb of flexible pavement heat |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106087636A (en) * | 2016-08-05 | 2016-11-09 | 中交第公路勘察设计研究院有限公司 | Permafrost Area freeze thawing resistance heat accumulation horizontal proliferation ventilation curb structure |
| CN112342856A (en) * | 2020-10-27 | 2021-02-09 | 东南大学 | Prefabricated reinforced concrete hollow slab pavement for permafrost region and preparation method thereof |
| CN112342858A (en) * | 2020-10-27 | 2021-02-09 | 东南大学 | Permafrost region precast hollow slab base pavement structure |
| CN112342857A (en) * | 2020-10-27 | 2021-02-09 | 东南大学 | Permafrost region precast hollow slab base pavement structure capable of accelerating construction speed |
| CN114182590A (en) * | 2021-11-19 | 2022-03-15 | 中铁隧道勘察设计研究院有限公司 | Novel hard road shoulder pavement structure suitable for highway excavation section road bed drainage |
-
2015
- 2015-05-05 CN CN201520282978.1U patent/CN204608547U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106087636A (en) * | 2016-08-05 | 2016-11-09 | 中交第公路勘察设计研究院有限公司 | Permafrost Area freeze thawing resistance heat accumulation horizontal proliferation ventilation curb structure |
| CN112342856A (en) * | 2020-10-27 | 2021-02-09 | 东南大学 | Prefabricated reinforced concrete hollow slab pavement for permafrost region and preparation method thereof |
| CN112342858A (en) * | 2020-10-27 | 2021-02-09 | 东南大学 | Permafrost region precast hollow slab base pavement structure |
| CN112342857A (en) * | 2020-10-27 | 2021-02-09 | 东南大学 | Permafrost region precast hollow slab base pavement structure capable of accelerating construction speed |
| CN112342856B (en) * | 2020-10-27 | 2022-04-15 | 东南大学 | Prefabricated reinforced concrete hollow slab pavement for permafrost region and preparation method thereof |
| CN114182590A (en) * | 2021-11-19 | 2022-03-15 | 中铁隧道勘察设计研究院有限公司 | Novel hard road shoulder pavement structure suitable for highway excavation section road bed drainage |
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