A kind of combined type sand protection facilities suitable for extreme wind area
Technical field
The present invention relates to dust storm Prevention Technique field, more particularly to a kind of combined type sand prevention suitable for extreme wind area sets
Apply.
Background technology
The social economy of the research of China's dust storm prevention and cure project and practice calls close around NORTHWEST CHINA wind sandy land
Development is target with environment remediation.In NORTHWEST CHINA portion arid area, Gobi desert, desert are widely distributed, Gobi desert, desert area wind speed
Up to 20~60 meter per seconds, it is big that a high position takes husky amount, and wind erosion roadbed, sand bury track, wind and turn over the disaster accidents such as train and happens occasionally, sternly
Jeopardize rail facility and traffic safety again.Therefore, in order to ensure the safe operation of high-speed railway, highway under strong wind atmosphere, prevent
Husky measure is the important technological problems that windblown sand movement faces.
Although it is relatively early to the research of the windblown sand movement in desert, Gobi Region railway and highway and application both at home and abroad, and it is existing compared with
Rich experience and theory, but compared with general drift sand earth's surface, extreme wind area dust storm, gravel particle spring are higher, and wind-force is powerful,
Structure of wind-Sand Flow is in unique " trunk " effect, the characteristic with encroachment.At present both at home and abroad for Gobi desert, desert it is especially big
The research of wind area hazards of sand storms improvement and related feasible technical measures are very few, are that current dust storm prevention and control field is badly in need of asking for solution
Topic.
The solid protection system of resistance that present Gobi desert, desert area are generally used can be played to less than 2 meters of conventional stream
The good husky effect of checking resistance, but in the Gobi desert of especially big wind speed, desert area, its sand prevention effect has following defect:
1st, the high-order dust storm to 2~5 meters of height does not have stop interception function;
2nd, due to the stop to low level high speed dust storm, promote part low level dust storm to turn to, increased high-order dust storm amount, and accelerate height
Position stream;
3rd, under the effect of especially big wind speed, easily there is wind erosion failure in conventional sand protection facilities.
The content of the invention
The technical problem to be solved in the present invention is to provide that a kind of to integrate training for sediment, resistance husky, sand prevention suitable for extreme wind
The combined type sand protection facilities in area;The sand protection facilities can effectively stop the high-order dust storm of interception.
In order to solve the above-mentioned technical problem, the technical scheme that the present invention takes is as follows:A kind of group suitable for extreme wind area
Box-like sand protection facilities;The sand protection facilities is arranged on the windward side of highway or railway, including sand preventing dyke, the husky fence of resistance and sand hole,
Sand hole is arranged on the leeward side of sand preventing dyke, and the husky fence of resistance is arranged on sand preventing dyke.
Further:Sand preventing dyke is subtriangular, and windward side levee slope and ground angle are 32 °~50 °, leeward side levee slope
It it is 20 °~32 ° with ground angle;The husky fence of resistance is arranged on sand preventing dyke top;The husky fence bottom of resistance sets pillar ground.
The present invention uses triangle sand preventing dyke in the preventing and treating in Gobi desert, desert extreme wind area railway and highway, anti-with trapezoidal
Sand barrier is compared, and the training for sediment effect of triangle sand preventing dyke becomes apparent, and saves material, though sand effect is limited, especially big
In the presence of wind speed, sand preventing dyke can change stream direction, make stream more overprotection object so as to prevent or reduce sand damage,
It is the first line of defence of the combined type sand protection facilities.
Present invention handicapping sand fence on sand preventing dyke, it is possible to increase the resistance of stream motion, promotes its sedimentation of slowing down, retardance
Passed by stream with interception, most of sand is rested on the windward side of sand preventing dyke, be the second defence line of the sand protection facilities.
The present invention sets sand hole in the leeward side of sand preventing dyke, the sand for crossing the husky fence of resistance is deposited in sand hole, keeps away
Exempt from or reduce harm of the especially big wind speed leeward sand drift to railway or highway, be the three lines of defence of the sand protection facilities.
The present invention constitutes the sand prevention system of systems of scale, based on big residing for Gobi desert, Desert Highway or railway
Wind wind sand environment, the Dominant Facies of sand preventing dyke and the husky fence of resistance are combined, be it is a kind of effectively deter high-order stream, without wind erosion and
Suitable for strong wind, the combined type sand protection facilities for integrating training for sediment, resistance sand, sand prevention in extreme wind region, for desert and Gobi ground
Checking and resistance are husky under the especially big wind speed wind sand environment in area.Result of study shows that the present invention can effectively resist the high position in especially big wind speed area
Stream, avoid erode phenomenon, dustproof effect significantly, effectively prevent high speed stream to railway and the sand damage of highway.
Brief description of the drawings
Fig. 1 is structural representation of the invention.
In figure:1-sand preventing dyke, the husky fence of 2-resistance, 3-sand hole, 4-pillar ground, 5-highway or railway, α-meet
Wind side levee slope and ground angle, β-leeward side levee slope and ground angle.
Specific embodiment
In the description of the invention, it is to be understood that the side of the instruction such as term " windward side ", " leeward side ", " top "
It, based on orientation shown in the drawings or position relationship, is described with simplified for ease of the description present invention that position or position relationship are, and
It is not that the device or element for indicating or inferring meaning must have specific orientation, be specific azimuth configuration and operation, thus
It is not intended that the limitation to present invention protection content.
Direction in the present embodiment is with Fig. 1 as reference:Arrow show prevailing wind direction;Windward side is that prevailing wind direction is first passed through
Side, leeward side be after prevailing wind direction by side.
As shown in Figure 1:A kind of combined type sand protection facilities suitable for extreme wind area;The sand protection facilities is arranged on highway or iron
The windward side on road 5, the sand protection facilities includes the husky fence 2 of sand preventing dyke 1, resistance and sand hole 3, and sand hole 3 is arranged on the back of the body of sand preventing dyke 1
Wind side, the husky fence 2 of resistance is arranged on sand preventing dyke 1.Whole combined type sand protection facilities is arranged on the windward side of railway or highway 5, energy
Effectively prevent railway or highway from receiving hazards of sand storms.
Sand preventing dyke 1 is subtriangular, is highly 0.5~2m;Research shows that 32 ° is the angle of repose on sand dune, therefore windward side
Levee slope is 32 °~50 ° with ground angle α, and leeward side levee slope is 20 °~32 ° with ground angle β;The husky fence 2 of resistance is arranged on sand prevention
The top of dike 1, is highly 1.5~3m, can give full play to the husky effect of its high steric-hindrance amino, effectively stops and intercepts high-order dust storm;The husky grid of resistance
The bottom of column 2 is provided with pillar ground 4, the firm reliability of the husky fence of enhancing resistance.
Sand hole 3 is arranged on the side of highway or railway 5, and it is 2~4m that sand cheats 3 width, and depth is 1.5~3m, be will extend over
The sand of the husky fence of resistance is collected into sand hole.