CN105088911B - One kind preventing and treating " pot cover effect " causes the new road based structures of disaster - Google Patents
One kind preventing and treating " pot cover effect " causes the new road based structures of disaster Download PDFInfo
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- CN105088911B CN105088911B CN201510455311.1A CN201510455311A CN105088911B CN 105088911 B CN105088911 B CN 105088911B CN 201510455311 A CN201510455311 A CN 201510455311A CN 105088911 B CN105088911 B CN 105088911B
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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
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Abstract
Cause the new road based structures of disaster this application discloses one kind preventing and treating " pot cover effect ", including be layed in the 37 lime earth layer close to and less than dew point depth；It is layed in the sandy gravel stratum of 37 lime earth layer upper surface；And it is arranged at the french drain of sandy gravel stratum both sides.Wherein：37 lime earth layer include the first rake and the second rake, 37 lime earth layer the boundary line on the first rake and the second rake axisymmetricly, and the first rake the gradient between 1%~5%.According to the scheme of the application, it is ensured that deep layer road base air in soil state water can be prevented to migrate and prevent insulating course from issuing angry state water condensation and forming secondary disaster upwards while road rheobase；And roadbed top ponding can be dredged, so as to play the purpose that preventing and treating " pot cover effect " causes disaster.
Description
Technical field
Patent of the present invention is related to a kind of preventing and treating " pot cover effect " to cause the new road based structures of disaster to be applied to preventing and treating airport
Runway road base disaster and analogue are got down the highway, railway bed disaster.
Background technology
" pot cover effect " in airfield runway road base refer to cause because road face is closed base top moisture can not discharge and
The road base increased phenomenon of shallow-layer water content of soil for causing.Arid area level of ground water is low, the upward water delivery of underground water capillarity
It is limited in scope, can hardly directly adds base top soil body moisture, shallow-layer soil body reclaimed water point is typically derived from the temperature difference and drives fortune
Deliver to the condensation of the vaporous water in shallow-layer low-temperature space on top.In arid and cold region this vapour complex and top cohesion
Phenomenon is especially prominent, is the important sources of airfield runway road base soil moisture.The presence of " pot cover effect ", prevents ponding from outflowing,
Cause base soil water content to continue to increase, can seriously trigger base soil intensity decreases, differential settlement, frost heave and road base to turn over
The serious engineering project disaster such as slurry.
The disaster that " pot cover effect " triggers is similar with subgrade frost heaving.
At present, the prevention and controls of subgrade frost heaving mainly have following several：
First, increase roadbed according to actual conditions, make the upper subgrade remotely lower or earth's surface water surface；Strengthen road surface or
Filled in easily causing the soil (such as silt) of frost boiling to change within certain depth under road surface native (such as gravel)；With slag, brickbat, the mud for compressing
Charcoal, pine and cypress skin etc. make insulating layer, prevent roadbed from freezing line and are elapsed to depths, thinning jelly layer.
Second, if horizontal french drain, the frost boiling section to highway longitudinal slope less than 3%, set under the groove of road horizontal french drain and
When discharge water penetration basic unit in longitudinal current and the spring melt excessive moisture when phase soil matrix thaws.
3rd, sewer is set, can be intercepted simultaneously using the level of ground water having near pipe sewer reduction roadbed or with sewer is intercepted
Exclusion flows to the intermediary water of roadbed；Improve pavement structure, lay Base with Sand Gravel Cushion, or rendzinas, cinder lime soil padding.
4th, lead warm layer as ventilative with evengranular gravel, rubble etc..
5th, administer road frost boiling, the service condition of road improvement using geosynthetics and anti-slurry roadbed is set
Structure control road frost boiling, surround roadbed etc. with polychloroethylene film.
However, prevention and controls as described above are only capable of solving to be increased by road face bottom water content caused by capillarity water delivery
The disaster of initiation, is not particularly suited for moving the disaster such as frost heave caused by the water content that causes of gaseous state water condensation increases.Therefore it is above-mentioned
" the pot cover effect " that method is not particularly suited in the case of Arid＆semi-arid area level of ground water is relatively low causes the preventing and treating of disaster.
The content of the invention
There is the disasters such as frost heave, frost boiling, differential settlement to prevent and treat the airfield runway caused by " pot cover effect ", it is ensured that
Its normal operation, the new road based structures that " pot cover effect " causes disaster are prevented and treated present invention aim at one kind is provided.
According to the one side of the application, a kind of road based structures, including：It is layed in the pseudo-ginseng ash close to and less than dew point depth
Soil layer；It is layed in the sandy gravel stratum of 37 lime earth layer upper surface；And it is arranged on the french drain of sandy gravel stratum both sides；Wherein：37 lime earth
Layer includes the first rake and the second rake, and 37 lime earth boundary line of the layer on the first rake and the second rake is in axle
Symmetrically, and the first rake the gradient between 1%~5%.
The road based structures are included lays one layer of closely knit 37 lime earth layer near dew point position, it is ensured that while intensity
It is main prevent deep layer road base air in soil state water migrate upwards and prevent from producing under layer vaporous water condensation and ponding；And in pseudo-ginseng ash
Soil layer top lays the larger slope sandy gravel stratum of hole to dredge roadbed top ponding, and hydrophobic gas shutoff plays preventing and treating " pot cover effect "
Cause the purpose of disaster.
Brief description of the drawings
By the detailed description made to non-limiting example made with reference to the following drawings of reading, the application other
Feature, objects and advantages will become more apparent upon：
Fig. 1 shows the road based structures for causing disaster according to the preventing and treating " pot cover effect " of the application one embodiment.
Specific embodiment
The application is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is used only for explaining related invention, rather than the restriction to the invention.It also should be noted that, in order to
It is easy to description, the part related to invention is illustrate only in accompanying drawing.
It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the application can phase
Mutually combination.Describe the application in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
Fig. 1 shows the road based structures for causing disaster according to the preventing and treating " pot cover effect " of the application one embodiment.
As shown in figure 1, road based structures of the invention include being layed in the 37 lime earth layer 10 close to and less than dew point depth
And be layed in the sandy gravel stratum 20 of 37 lime earth layer upper surface and be arranged on the french drain 30 of the both sides of sandy gravel stratum 20.Herein, reveal
Point depth is depth corresponding with dew-point temperature.
Wherein, 37 lime earth layer 10 includes the first rake 11 and the second rake 12.37 lime earth layer inclines on first
The boundary line of inclined portion 11 and second rake 12 axisymmetricly, and the first rake the gradient between 1%~5%.
In some implementations, the first rake 11 and the second rake 12 be crossed to form 37 lime earth layer top with
The distance between dew point depth 40 d can be between 20~30 centimetres.
In some implementations, the thickness of 37 lime earth layer 10 can be between 20~30 centimetres.
In some implementations, the thickness of sandy gravel stratum 20 can be between 20~30 centimetres.
Road based structures in the present invention, the laying of 37 lime earth layer 10 can prevent deep layer vaporous water from migrating upwards, and three
Seven grey soil layers 10 are laid on below dew point depth can be prevented from producing vaporous water to condense to form new disaster under layer.
In some implementations, determine that dew point depth can include：Determine to steam based on the gentle relative humidity in thermostat layer ground
Vapour pressure；Dew-point temperature is determined based on vapour pressure；And dew point depth is determined based on ground temperature-depth profile curve.
In the application scenes of these implementations, for example, can be according to monitoring the soil body thermostat layer that obtains throughout the year
Ground temperature obtains saturated vapor pressure at this temperature using following formula (1)：
Wherein, uv,satIt is saturated vapor pressure, T is thermostat layer ground temperature.
Then relative humidity, according to soil body hole gas at a temperature of the thermostat layer that obtains of measurement and obtained by formula (1)
Saturated vapor pressure, obtain vapour pressure using following formula (2)：
uv=RHuv,sat (2)
Wherein, RH is relative humidity, uvIt is vapour pressure.
In soil body hole gas relative humidity at a temperature of measuring thermostat layer, for example, can be wet with thermocouple psychrometer, Cold Mirrors
The equipment such as degree meter, polymer resistive/capacitance sensor are sampled measurement.
Then, by counted vapour pressure u in formula (2)vBring following formula (3) into and obtain dew-point temperature：
Wherein, TdIt is the dew-point temperature for calculating.
Finally, based on monitoring gained ground temperature-depth profile curve throughout the year, just can determine that dew point depth.
Road based structures of the invention fundamentally prevent vaporous water upward using the trapping effect of closely knit 37 lime earth layer
Migration；Trapping can prevent condensed water from being produced under vapour barrier at dew point position, it is therefore prevented that secondary disaster is in 37 lime earth layer
Bottom is formed；The 37 lime earth layer top road possible ponding of base can in time be discharged using slope sandy gravel stratum, prevented from earth's surface
The accumulation of infiltration.
Above description is only the preferred embodiment and the explanation to institute's application technology principle of the application.People in the art
Member is it should be appreciated that involved invention scope in the application, however it is not limited to the technology of the particular combination of above-mentioned technical characteristic
Scheme, while should also cover in the case where the inventive concept is not departed from, is carried out by above-mentioned technical characteristic or its equivalent feature
Other technical schemes for being combined and being formed.Such as features described above has similar work(with (but not limited to) disclosed herein
The technical scheme that the technical characteristic of energy is replaced mutually and formed.
Claims (4)
1. a kind of road based structures, it is characterised in that including：
It is layed in the 37 lime earth layer close to and less than dew point depth；
It is layed in the sandy gravel stratum of the 37 lime earth layer upper surface；And it is arranged at the french drain of the sandy gravel stratum both sides；
Wherein：
The 37 lime earth layer includes the first rake and the second rake, and the 37 lime earth layer is on the first rake and institute
State the boundary line of the second rake axisymmetricly, and first rake the gradient between 1%~5%；
Wherein, dew point depth is determined based on following steps：
Vapour pressure is determined based on the gentle relative humidity in thermostat layer ground；
Dew-point temperature is determined based on vapour pressure；And
Dew point depth is determined based on ground temperature-depth profile curve.
2. road based structures according to claim 1, it is characterised in that：
Distance is 20~30 centimetres between the top of the 37 lime earth layer and the dew point depth.
3. road based structures according to claim 1 and 2, it is characterised in that：
The thickness of the 37 lime earth layer is 20~30 centimetres.
4. road based structures according to claim 3, it is characterised in that：
The thickness of the sandy gravel stratum is 20~30 centimetres.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510455311.1A CN105088911B (en) | 2015-07-29 | 2015-07-29 | One kind preventing and treating " pot cover effect " causes the new road based structures of disaster |
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| CN201510455311.1A CN105088911B (en) | 2015-07-29 | 2015-07-29 | One kind preventing and treating " pot cover effect " causes the new road based structures of disaster |
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| CN105088911A CN105088911A (en) | 2015-11-25 |
| CN105088911B true CN105088911B (en) | 2017-06-30 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107102115A (en) * | 2017-04-24 | 2017-08-29 | 北京航空航天大学 | A kind of method and device of " pot cover effect " site-models experiment |
| CN109537386B (en) * | 2018-10-31 | 2021-08-24 | 广东省交通规划设计研究院股份有限公司 | Roadbed structure and roadbed construction method |
| CN109610562B (en) * | 2018-12-19 | 2020-09-22 | 北京航空航天大学 | Method for collecting water generated by pot cover effect |
| CN109610258A (en) * | 2019-01-17 | 2019-04-12 | 河海大学 | A kind of joint electro-osmosis method prevention and treatment " pot cover effect " causes the road based structures of disaster |
| CN114892759B (en) * | 2022-02-25 | 2023-03-21 | 北京航空航天大学 | Desert shallow water storage technology utilizing pot cover effect |
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| JPH0688303A (en) * | 1992-09-07 | 1994-03-29 | Shin Etsu Chem Co Ltd | Method for constructing road |
| CN1730822A (en) * | 2005-08-23 | 2006-02-08 | 中国科学院寒区旱区环境与工程研究所 | Composite ventilating and cold energy gathering roadbed |
| CN101914882A (en) * | 2010-07-30 | 2010-12-15 | 东南大学 | Low embankment structure in phreatic high slity soil region and construction method thereof |
| CN103243624A (en) * | 2013-05-14 | 2013-08-14 | 中铁二十一局集团第四工程有限公司 | Construction method for salty soil district railway roadbed with water content lower than liquid limit |
| CN103966934A (en) * | 2014-04-30 | 2014-08-06 | 长沙理工大学 | Method for improving frozen stability of highway subgrade in seasonal frozen region |
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2015
- 2015-07-29 CN CN201510455311.1A patent/CN105088911B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0688303A (en) * | 1992-09-07 | 1994-03-29 | Shin Etsu Chem Co Ltd | Method for constructing road |
| CN1730822A (en) * | 2005-08-23 | 2006-02-08 | 中国科学院寒区旱区环境与工程研究所 | Composite ventilating and cold energy gathering roadbed |
| CN101914882A (en) * | 2010-07-30 | 2010-12-15 | 东南大学 | Low embankment structure in phreatic high slity soil region and construction method thereof |
| CN103243624A (en) * | 2013-05-14 | 2013-08-14 | 中铁二十一局集团第四工程有限公司 | Construction method for salty soil district railway roadbed with water content lower than liquid limit |
| CN103966934A (en) * | 2014-04-30 | 2014-08-06 | 长沙理工大学 | Method for improving frozen stability of highway subgrade in seasonal frozen region |
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