CN105064158B - Prevention method for disasters caused by "pot effect" of airport runway - Google Patents
Prevention method for disasters caused by "pot effect" of airport runway Download PDFInfo
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- CN105064158B CN105064158B CN201510397518.8A CN201510397518A CN105064158B CN 105064158 B CN105064158 B CN 105064158B CN 201510397518 A CN201510397518 A CN 201510397518A CN 105064158 B CN105064158 B CN 105064158B
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Abstract
The invention relates to a prevention method for disasters caused by the "pot effect" of an airport runway. The method comprises the step of paving a drainage gas insulation layer on the position, below the depth corresponding to the dew-point temperature, of a road foundation. The purpose of gas insulation is to guarantee that condensate water near the road foundation only comes from a soil body above the dew-point line, to reduce the condensate water amount to keep the moisture content of the upper soil body basically constant, and the purpose of drainage is to drain water possibly existing on the upper soil body in time. By adopting the scheme, engineering disasters of frost boiling of the road foundation and the like caused by the "pot effect" can be effectively prevented.
Description
Technical field
The application is related to technical field of civil engineering, more particularly to a kind of road base and " pot cover effect " to cause the preventing and treating of disaster
Method.
Background technology
Used as arid and semi-arid cold district airfield runway easily one of engineering project disaster of hair, " pot cover effect " causes engineering
The extensive concern in field." pot cover effect " refers to the road base for causing base top moisture to discharge and cause because road face is closed
Shallow-layer water content of soil increases the phenomenon of intensity decreases.Arid area level of ground water is low, the upward water delivery model of underground water capillarity
Limit is with, base top soil body moisture can hardly be directly added, shallow-layer soil body reclaimed water point is typically derived from altitude temperature difference effect and causes
The condensed water that is formed on top of water translocation.The temperature reduction of road face decreases shallow-layer soil temperature, shortcut face soil reclaimed water
Steam condenses in road basal part near zone.Also there is temperature between shallow-layer road base soil and the more constant deep layer road base soil of temperature simultaneously
Difference, causes the vapor in the gas of deep layer soil pores to be migrated upwards with air flow, and the aqueous vapor balance in deep soil maintains hole
Gas humidity is constant, therefore the aqueous water in deep soil can become vapor and be transported to shallow-layer, shallow soil reclaimed water by air flow
Steam continues to be condensed in Dao Mianchu causes topsoil water content to continue to increase.Base soil intensity decreases, road base can seriously be triggered
The serious engineering project disaster such as frost boiling.
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
The layer that exclusion flows to roadbed asks water；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 disaster caused by the water content increase that condensation causes.Therefore the above method and do not apply to
Cause the preventing and treating of disaster in " the pot cover effect " in the case of Arid＆semi-arid area level of ground water is relatively low.
The content of the invention
It is given below on brief overview of the invention, to provide the basic reason on certain aspects of the invention
Solution.It should be appreciated that this general introduction is not on exhaustive general introduction of the invention.It is not intended to determine key of the invention
Or pith, nor is it intended to limit the scope of the present invention.Its purpose only provides some concepts in simplified form, with
This is used as the preamble in greater detail discussed after a while.
One main purpose of the application is to provide a kind of side of the engineering project disaster that preventing and treating road " pot cover effect " causes
Case, and with low cost, construction is convenient.
According to the one side of the application, a kind of airfield runway " pot cover effect " causes the prevention and controls of disaster, including：From ground
Table excavates vertical duct；Determine corresponding first depth of dew-point temperature；And hydrophobic vapour barrier is laid in the second depth, wherein,
Second depth is more than and close to the first depth.Wherein, trapping is to ensure that condensed water only is from the top soil body, so as to reduce solidifying water
Measure and keep top water content of soil to be basically unchanged；Hydrophobic, being may ponding in order to dredge the top soil body in time.
The airfield runway " pot cover effect " of the application causes the prevention and controls of disaster, can effectively prevent because " pot cover is imitated
Should " engineering project disaster such as the road base frost boiling that triggers.
Brief description of the drawings
Below with reference to the accompanying drawings illustrate embodiments of the invention, can be more readily understood that more than of the invention and it
Its objects, features and advantages.Part in accompanying drawing is intended merely to show principle of the invention.In the accompanying drawings, identical or similar
Technical characteristic or part will be represented using same or similar reference.
Fig. 1 shows the indicative flowchart of the prevention and controls of " the pot cover effect " according to the application one embodiment.
Specific embodiment
Illustrate embodiments of the invention with reference to the accompanying drawings.Retouched in an accompanying drawing of the invention or a kind of implementation method
The element and feature that the element and feature stated can show in one or more other accompanying drawings or implementation method are combined.Should
Work as attention, for purposes of clarity, eliminated known to unrelated to the invention, those of ordinary skill in the art in accompanying drawing and explanation
Part and treatment expression and description.
It is shown in Figure 1, it is the indicative flowchart of the prevention and controls of " the pot cover effect " of the application one embodiment.
Specifically, in step 110, vertical duct is excavated from earth's surface.The depth in vertical duct can be relatively deep, for example,
Corresponding first depth of dew-point temperature can be significantly greater than.
Then, in the step 120, corresponding first depth of dew-point temperature is determined.
And, in step 130, hydrophobic vapour barrier is laid in the second depth.Herein, the second depth is deep more than first
Degree.For example, the laying depth of laying road base may be located at the first depth corresponding more than dew-point temperature, and near first depth
Depth.
After laying hydrophobic vapour barrier, trapping is to ensure that condensed water only is from the top soil body so as to reduce condensate flow and keep
Nearby water content of soil is basically unchanged road base, hydrophobic, and being may ponding in order to dredge the top soil body in time.
In some implementations, corresponding first depth of the determination dew-point temperature of step 120 can include：Step 121,
Vapour pressure is determined based on constant subsurface temperature and relative humidity.Step 122, dew-point temperature is determined based on vapour pressure；And step
123, the first depth corresponding with dew-point temperature is determined based on ground temperature-depth profile curve.
In the application scenes of these implementations, for example, in step 121, the perseverance that can be obtained according to measurement
Determining subsurface temperature utilizes following formula (1) to obtain saturated vapor pressure at this temperature：
Wherein, uv,satIt is saturated vapor pressure, T is constant subsurface temperature.
Then, relative humidity is obtained according to measurement and the saturated vapor pressure that is obtained by formula (1), using following formula
(2) vapour pressure is obtained：
Wherein, RH is relative humidity, uvIt is vapour pressure.
In Relative Humidity Measuring, for example, can be with graduated rope by moisture meter vertical transport to specified depth
At the degree soil body, and upper end rope is fixed makes hygrometer hanging in the soil body, and closed earth's surface hole, standing a period of time treats that humidity is surveyed
Gauge registration stabilization, the humidity at the moisture readings for now reading, as underground designated depth.Five surveys are taken in measured zone
Point repeats aforesaid operations respectively, the soil body air humidity value of constant ground temperature depth in measuring channels base soil scope, and averages
As the relative humidity of soil body air at constant ground temperature.
Then, in step 112, dew-point temperature can be obtained based on following formula (3)：
Wherein, TdIt is the dew-point temperature for calculating.
Finally, based on ground temperature-depth profile curve, just can determine that the first depth corresponding with dew-point temperature.
When the second depth more than the first depth lays hydrophobic vapour barrier, each under it one layer of fine grained soil can be spread to dredging
Water vapour barrier is protected, to extend the service life of hydrophobic vapour barrier.
In apparatus and method of the invention, it is clear that each part or each step can be after decomposing, combine and/or decomposing
Reconfigure.These decompose and/or reconfigure and should be regarded as equivalents of the invention.Meanwhile, have to the present invention above
In the description of body embodiment, the feature for describing and/or showing for a kind of implementation method can be existed in same or similar mode
Used in one or more other embodiments, it is combined with feature in other embodiment, or substitute other embodiment party
Feature in formula.
It should be emphasized that term "comprises/comprising" refers to the presence of feature, key element, step or component when being used herein, but simultaneously
It is not excluded for the presence of one or more further features, key element, step or component or additional.
Although the present invention and its advantage has been described in detail it should be appreciated that without departing from by appended claim
Various changes can be carried out in the case of the spirit and scope of the present invention for being limited, is substituted and is converted.And, the model of the application
Enclose process, equipment, means, the specific embodiment of method and steps for being not limited only to described by specification.In the art is common
Technical staff will readily appreciate that from the disclosure, can be used according to the present invention and performed and corresponding reality described herein
Apply the essentially identical function of example or obtain process essentially identical with it result, existing and that future is to be developed, equipment,
Means, method or step.Therefore, appended claim is directed at including such process, equipment, hand in the range of them
Section, method or step.
Claims (1)
1. a kind of prevention and controls of road frost boiling, it is characterised in that including：
Vertical duct is excavated from earth's surface；
Determine corresponding first depth of dew-point temperature；And
Hydrophobic vapour barrier is laid in the second depth, wherein, second depth is more than and close to first depth；
It is described to determine that corresponding first depth of dew-point temperature includes：
Vapour pressure is determined based on constant subsurface temperature and relative humidity；
Dew-point temperature is determined based on vapour pressure；
The first depth corresponding with the dew-point temperature is determined based on ground temperature-depth profile curve.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510397518.8A CN105064158B (en) | 2015-07-08 | 2015-07-08 | Prevention method for disasters caused by "pot effect" of airport runway |
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| CN201510397518.8A CN105064158B (en) | 2015-07-08 | 2015-07-08 | Prevention method for disasters caused by "pot effect" of airport runway |
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| CN105064158A CN105064158A (en) | 2015-11-18 |
| CN105064158B true CN105064158B (en) | 2017-05-24 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| CN110387781B (en) * | 2019-06-04 | 2021-10-22 | 北京中企卓创科技发展有限公司 | Method for preventing and treating disasters caused by 'pot cover effect' of airport flying pavement |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1061823A (en) * | 1991-12-21 | 1992-06-10 | 天津市水利科学研究所 | Fast drying and consolidating method with vacuum precompression for blown soil fill |
| CN101476317A (en) * | 2009-01-11 | 2009-07-08 | 中国水产广州建港工程公司 | Mud surface curing process |
| CN101736735A (en) * | 2009-12-22 | 2010-06-16 | 叶吉 | Composite reinforcing method for combining soft foundation light well point pipe with plastic drainage plate |
| KR20100129472A (en) * | 2009-06-01 | 2010-12-09 | 한상남 | Pre-loading method for water drainage in the soft ground and the same pre-loading material |
-
2015
- 2015-07-08 CN CN201510397518.8A patent/CN105064158B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1061823A (en) * | 1991-12-21 | 1992-06-10 | 天津市水利科学研究所 | Fast drying and consolidating method with vacuum precompression for blown soil fill |
| CN101476317A (en) * | 2009-01-11 | 2009-07-08 | 中国水产广州建港工程公司 | Mud surface curing process |
| KR20100129472A (en) * | 2009-06-01 | 2010-12-09 | 한상남 | Pre-loading method for water drainage in the soft ground and the same pre-loading material |
| CN101736735A (en) * | 2009-12-22 | 2010-06-16 | 叶吉 | Composite reinforcing method for combining soft foundation light well point pipe with plastic drainage plate |
Non-Patent Citations (1)
| Title |
|---|
| 土体的"锅盖效应";李强;《工业建筑》;20140228;第44卷(第2期);全文 * |
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