CN1707035A - Hollow concrete block for protecting perenial frozen soil road bed and slope - Google Patents
Hollow concrete block for protecting perenial frozen soil road bed and slope Download PDFInfo
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- CN1707035A CN1707035A CN 200510065341 CN200510065341A CN1707035A CN 1707035 A CN1707035 A CN 1707035A CN 200510065341 CN200510065341 CN 200510065341 CN 200510065341 A CN200510065341 A CN 200510065341A CN 1707035 A CN1707035 A CN 1707035A
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Abstract
The hollow concrete block for protecting perennial frozen soil road bed and slope consists of plant stalks, cement, sand and soil, and is hollow cube with outer side length of 30-200 mm and wall thickness of 10-50 mm. It may be also hollow sphere, hollow cuboid or hollow cylinder. The present invention is simple in construction, low in cost, easy in maintenance, and has the merits of both sun shield and ballast revetment. Hollow blocks of different shapes are combined in certain thickness to reach excellent sun shielding effect and excellent ventilation and temperature lowering effect for protecting perennial frozen soil road bed and slope positively.
Description
Technical field
The present invention relates to a kind of concrete hollow block that is used to protect the subgrade in permafrost soil zone ramped surfaces.
Background technology
Frozen soil is that a kind of temperature is lower than 0 ℃ and contain the Tu Yan of ice, mainly is divided into seasonal frozen ground (first quarter moon is to the several months), ever-frozen ground (more than a year) by the length of frozen soil retention time, and its distributed areas are called Han Qu.Being covered by cold district more than 50% of world land area accounts for 75% and 21.5% of area at the area of China Han Qu and ever-frozen ground.China belongs to third place in the world frozen soil big country, and high height above sea level ever-frozen ground area then occupies the first in the world.
Frozen soil be not only because its character of existence of ice can be melted the change that complicated and essence take place soil, and in the ever-frozen ground district, by long-term evolution, development and variation, more can form the thick thick-layer ground ice that reaches several meters even tens meters, each tool form.In wide Permafrost Area, the mineral reserve that are richly stored with, forest and land resources.Because development of resources, thawing and frozen soil environment that the thick-layer ground ice is very easily brought out in the mankind's activity that increasingly sharpens change, and human engineering building and natural environment are brought material impact even disaster.Along with the continuous commentaries on classics of global climate is warm, make this form become severe more.
Qinghai-Tibet Railway, Qinghai-Tibet Highway object of construction production and the Xinjiang-Tibet highway that will carry out that China builds, Xinjiang-Tibet railway, south water to north west lineman's journey all face high temperature (be temperature near 0 ℃ ever-frozen ground), hight-ice-content permafrost (being that the volume ice content surpasses 30% ever-frozen ground substantially), weather changes many difficult problems such as the continuous degeneration of warm ever-frozen ground.How to resolve the interaction of roadbed and basis and ever-frozen ground, guarantee long-term year of roadbed and basis to stablize, guarantee that the engineering construction safe operation also just becomes the key scientific problems that needs to be resolved hurrily.
China cold district scientific worker is based on national conditions; around Qinghai-Tibet Railway country Important Project project; under guidance with " cooling roadbed " scientific thought; be the active protection ever-frozen ground; reach the long-term stability of frozen soil engineering; closely carried out positive exploration and system research, taken the lead in proposing the engineering measure of sunbreaker and the domatic cooling of jackstone rubble bank protection embankment around various engineering measures.Sunbreaker is that parallel embankment or cutting slope are domatic, lays layer of plate in the position of certain altitude, reaches the purpose of the domatic temperature of reduction by the direct radiation of the reflection sun.The field condition observed result shows that the domatic temperature of laying the sunbreaker measuring frequency section is more common domatic, will hang down twenties degree by day under the sufficiency at sunshine to thirties degree, by changing low approximately nearly ten degree of average temperature round the clock.It should be a kind of engineering measure that can effectively reduce roadbed bottom, road ever-frozen ground temperature.In engineering practice, be difficult to apply.Its reason is, if this kind measure cost is higher, damage easily under adverse circumstances such as Qinghai-Tibet strong wind, the big large tracts of land of maintenance cost use embankment domatic by the destruction of rain drop erosion part can't repair, can't carry out domatic vegetation recovery, because white reflection works the mischief to traffic safety easily and problems such as environmental protection.
The measure of rubble slope protection works is the rubble at the certain particle diameter of the domatic laying one deck of embankment, and flowing slowly therein by air-flow accumulates in the cold energy in the external world bottom of macadam gradually, finally reaches the purpose of protection frozen soil.But desirable not to the utmost from result's effect of engineering practice, mainly be reflected in and accumulate that cold energy is limited, construction technology is comparatively complicated, cost space very high, in the higher regional rubble of wind sand amount will be crammed by wind sand gradually, cause in ultimate failure.
In sum, though the sunbreaker cooling-down effect is obvious, lack the domatic protection of road foundation; Though rock revetment can increase the domatic stability of road foundation, cooling-down effect is not satisfactory.Therefore, be badly in need of a kind of engineering measure in the engineering practice at present, when both playing better cooling-down effect, simultaneously, can play a very good protection to road foundation is domatic again roadbed is domatic.
Summary of the invention
The objective of the invention is according to China's Permafrost Area natural climate condition and environmental characteristic, fully with reference to existing scientific achievement and existing problems, in line with making full use of natural cold-energy, in conjunction with engineering practice, advantage with above-mentioned two kinds of measures is a starting point, has proposed the domatic concrete hollow block of a kind of roadbed.By being laid on a kind of special-type hollow piece of embankment or cutting ramped surfaces, can block and eliminate irradiation and the heat effect of the sun to ramped surfaces, overcome the solar radiation harmful effect that levee slope face frozen soil engineering caused of satisfying the need; Utilize effective natural convection of air further to reduce domatic temperature simultaneously, finally safeguard the long-term stability of ever-frozen ground and engineering construction.Meanwhile, also can play a very good protection to road foundation is domatic.
Purpose of the present invention can reach by following measure:
A kind of concrete hollow block of protecting the ever-frozen ground embankment domatic of being used to is made of plant stalk, sand and cement or sand and cement.The hollow pot of making is a cube, and the outer length of side of cube is 30～200mm, and wall thickness is 10～50mm.
Above-mentioned hollow pot is a cylinder, and the cylinder outer radius is 30～200mm, and height is 30～500mm, and wall thickness is 10～50mm.
Above-mentioned hollow pot is a cuboid, and the outer length of side is 30～200mm at the bottom of the cuboid, and wide is 20～150mm, and height is 30～500mm, and wall thickness is 10～50mm.
Above-mentioned hollow pot is a spheroid with holes, and the outer radius of spheroid is 10～100mm, and wall thickness is 10～50mm.
The beneficial effect of advantage of the present invention and generation is:
1, be easy to implement, cost is relatively low, easy maintenance.Because the material that uses is mainly cement, sand, engineering cost greatly reduces than sunbreaker and rubble bank protection.Main embodiment is field machining, laying since special section bar material simple shape can be a large amount of fast at the scene, processing, stack.In the big area of wind sand amount, treat that wind sand runs up to when influencing its usefulness can pulverize again fast, process, lay so need not frequent maintenance, saved spending;
2, usefulness obviously has very strong practicality.The present invention not only has sunbreaker measure sunshade, aeration-cooling usefulness, and has the cold-storage effect of rock revetment measure, finally can effectively reduce roadbed temperature and strengthen resistance to overturning.Meanwhile, be deposited in special section bar material on domatic and can effectively protect domaticly, prevent rain drop erosion, thereby can keep the long-term stability of frozen soil engineering;
3, preserve the ecological environment, promote the balance and the coordination of natural environment and human engineering.Enforcement by this concrete hollow block, the destruction that not only can avoid a large amount of quarrying stones that fragile ecological environment is produced, the white visual pollution of avoiding sunbreaker to give out light strongly causing, potential danger to highway driving safety is brought can also help the recovery of vegetation more by the material that adds heterogeneity;
4, meet the natural law more.This kind measure can also make full use of the latent heat that precipitation absorbs and further reduce surface temperature in evaporation process;
5, this kind measure can also be used for other cold district engineering, effectively protects ever-frozen ground and the long-term stability of keeping engineering construction.As needing the position of enhanced stability at petroleum pipeline, optical cable project etc., can reach the purpose of enhanced stability by stacking the special section bar material of this kind.
Description of drawings
Fig. 1 is a hollow cubic body schematic diagram of the present invention
Fig. 2 is the schematic diagram of hollow cylinder of the present invention
Fig. 3 is that the present invention is at the domatic enforcement hollow pot of roadbed schematic diagram
Fig. 4 is sunbreaker, rock revetment, the domatic cooling-down effect comparison diagram of three kinds of measures of hollow pot
The specific embodiment
Below in conjunction with accompanying drawing, the present invention is further described again:
Embodiment 1
A kind of concrete hollow block of protecting subgrade in permafrost soil zone domatic of being used to, hollow pot is that 20% cement and 45% sand constitute by weight 35% plant stalk and weight.The hollow pot of making is a cube 1, and cube is that the outer length of side is the square cube of 50mm, and wall thickness is the 20mm (see figure 1).
By field condition processing or indoor plant produced the tangerine bar is pulverized and cement.Sand mixes, and the water mixing form slurry that stirs charges into mould and solidifies, and one-shot forming is hollow cubic body 1.
The hollow cubic representative is deposited in the roadbed ramped surfaces according to certain mode, or stacks the position (see figure 3) that one deck necessarily is thicker than needs cooling.In stacking process, can form a lot of spaces between each hollow cubic body 1; hollow cell cube itself just has very large space simultaneously; therefore this being combined in not only has good shaded effects after reaching certain thickness; and have good aeration-cooling usefulness, can also can play a very good protection to road foundation is domatic.
The sand of getting weight and be 40% cement and 60% adds water and stirs, and processing is as embodiment 1.Making outer radius is 40mm, and height is 50mm, and wall thickness is the hollow cylinder 2 of 25mm.Hollow cylinder 2 is deposited in the domatic of cutting, can reaches the effect of embodiment 1 equally.
Experimental example
The laboratory test results contrast
For verifying the validity of this kind technology, carried out indoor small-sized simulated test in frozen soil engineering National Key Laboratory.At first set up the domatic of embankment with the gradient by a certain percentage at the stable simulation laboratory of ambient conditions (comprising temperature, humidity, air-flow); Secondly above domatic, according to same ratio the radiation bulb of some is installed according to open-air intensity of solar radiation, and the every day of opening and closing at the appointed time; Near laying high-sensitive thermistor temp probe (precision is for ± 0.01 ℃) in the domatic soil layer, promptly set up the temperature observation field, the temperature observation result is gathered and storage by the DT500 data collecting instrument automatically by computer control; With domatic vertical division is two zones, and the left side is the trial zone, and the right is to the contrast district; On domatic trial zone, lay at last the special section bar material that sunbreaker, rubble and the present invention mention respectively.By the analysis to observed result, under the simulation sunshine condition, in three kinds of different measure processs of the test, the temperature of contrast district is basic identical, i.e. the background condition of several measures is basic identical, and result of the test can be carried out analogy.
Fig. 4 has reflected sunbreaker, rock revetment, the domatic cooling observation of three kinds of measures of special section bar material comparing result.As seen from the figure, the cooling-down effect of sunbreaker is the most obvious, has prevented the rising of domatic temperature substantially: secondly for concrete hollow block, can reduce about 80% of domatic temperature substantially; What effect was the poorest is rock revetment, about 15% of the domatic temperature of only demoting, its reason is mainly the jackstone thickness of laying, and some is not enough, simultaneously, its cooling is main according to changing round the clock, reaching cooling-down effect by assembling cold energy, be a process slowly, but its general effect still is not equal to before both.
Claims (4)
1, a kind of concrete hollow block of protecting subgrade in permafrost soil zone domatic of being used to is made of plant stalk, cement and sand or sand and cement, it is characterized in that hollow pot is a cube, and the outer length of side of cube is 30～200mm, and wall thickness is 10～50mm.
2, a kind of domatic concrete hollow block of ever-frozen ground embankment base that is used to protect as claimed in claim 1 is characterized in that above-mentioned hollow pot is a cylinder, and the cylinder outer radius is 30～200mm, and height is 30～500mm, and wall thickness is 10～50mm.
3, a kind of domatic concrete hollow block of ever-frozen ground embankment base that is used to protect as claimed in claim 1; it is characterized in that above-mentioned hollow pot is a cuboid, the outer length of side of cuboid is 30～200mm, and wide is 20～150mm; height is 30～500mm, and wall thickness is 10～50mm.
4, a kind of domatic concrete hollow block of ever-frozen ground embankment base that is used to protect as claimed in claim 1 is characterized in that above-mentioned hollow pot is a spheroid with holes, and the outer radius of spheroid is 10-100mm, and wall thickness is 10～50mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100653418A CN100368636C (en) | 2005-04-04 | 2005-04-04 | Hollow concrete block for protecting perenial frozen soil road bed and slope |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100653418A CN100368636C (en) | 2005-04-04 | 2005-04-04 | Hollow concrete block for protecting perenial frozen soil road bed and slope |
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| Publication Number | Publication Date |
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| CN1707035A true CN1707035A (en) | 2005-12-14 |
| CN100368636C CN100368636C (en) | 2008-02-13 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107201709A (en) * | 2016-03-17 | 2017-09-26 | 中国科学院寒区旱区环境与工程研究所 | A kind of roadbed of overall balanced cooling cold-storage |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1279221A (en) * | 1999-06-30 | 2001-01-10 | 张雪峰 | Thermally insulating material for building |
| JP2002322651A (en) * | 2001-04-26 | 2002-11-08 | Nippon Biso Kogyo Kk | Concrete building material |
| CN100419160C (en) * | 2002-11-27 | 2008-09-17 | 中国科学院寒区旱区环境与工程研究所 | Thermal-insulating cold-conductive device for protecting frozen soil |
| CN1255351C (en) * | 2003-11-25 | 2006-05-10 | 湖北龙阳建筑工程材料科技开发有限公司 | Cement reinforced composite heat preservation brickwork and its production method |
| CN2856174Y (en) * | 2005-04-04 | 2007-01-10 | 中国科学院寒区旱区环境与工程研究所 | Hollow blocks laying on slope of roadbed |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107201709A (en) * | 2016-03-17 | 2017-09-26 | 中国科学院寒区旱区环境与工程研究所 | A kind of roadbed of overall balanced cooling cold-storage |
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| Publication number | Publication date |
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| CN100368636C (en) | 2008-02-13 |
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Granted publication date: 20080213 Termination date: 20140404 |